A hood outer panel part flanging die and a flanging and unloading method

Abstract

The application discloses an engine cover outer plate part flanging die and a flanging and discharging method, which comprises a lower die base and an upper die base, the lower die base is provided with a fixed punch, the upper die base is provided with an upper die inclined wedge flanging cutter, and the upper die base is further provided with a first linear module and a second linear module, the moving end of each first linear module is connected with an inclined wedge movable punch, the moving end of the second linear module is connected with a horizontal movable punch, the horizontal movable punch is provided with a fixed positioning, and the lower die base is provided with a floating positioning. Through a set of variable part positioning system and three movable punch components matched with the set of variable part positioning system, the part horizontal displacement type discharging can be realized. Compared with the discharging method always used in the industry, the application can effectively improve the production efficiency and reduce the investment cost, and meets the high-speed low-energy consumption stamping production line of the passenger car engine cover outer plate part flanging die required by the environmental protection policy.

Description

Technical Field

[0001] This invention belongs to the field of cold stamping technology, and specifically discloses a flanging die and a flanging unloading method for an engine hood outer panel part. Background Technology

[0002] In existing technology, a car engine hood is formed by binding together an outer hood panel and an inner hood panel, used to cover the car engine and engine compartment components. Before binding, the outer hood panel is manufactured by stamping, and the stamping process generally includes: blanking → drawing → trimming → flanging. The molds used to form the car engine hood are generally called flanging molds or folding molds.

[0003] Flanging or folding dies are one of the basic die types used in the stamping of passenger vehicle engine hood outer panel parts. The specific function of a flanging or folding die is to create a flange of 90° or less on the edge of the part. After flanging, the part will be stuck on the die and cannot be directly grasped by the robot. Unloading is required first to demold the part before it can be grasped by the robot. Currently, there are two main unloading methods:

[0004] 1.1.1 Pneumatic Ejector Unloading Method Based on Time-Sequence Control: This method is a one-time flanging forming process. The principle is to use compressed air to drive a telescopic cylinder, causing the ejector sliders to push the part in a time sequence to complete the demolding process. This method includes: Step 1: Placing two sets of pneumatic ejector devices (a total of 12 ejector sliders) on the front, back, left, right, and four corners of the engine hood outer panel part, plus a pneumatic rubber ejector tray in the middle area of ​​the part, and movable punches driven by large cylinders on the left and right sides of the mold. Step 2: Using 3 or 4 sets of automated air source controllers on the press trolley, all the above pneumatic devices are controlled in a time sequence, so that the movable punches on the left and right sides of the mold sink first, and then the 12 ejector sliders push in the order of ① rear ② left and right ③ front ④ four corners to demold the part. Step 3: The ejector tray in the middle of the part pushes to complete the unloading. Step 4: Robot gripping. The disadvantages of the time-sequence-controlled pneumatic ejector slider unloading method are as follows: 1. Slow unloading speed: The entire unloading process involves multiple time sequences that cannot be parallelized, resulting in significant time waste and becoming a bottleneck process in automated production lines, leading to low CT values. 2. Energy waste: It requires 12 medium-sized cylinders and 3 large cylinders, resulting in a large total consumption of compressed air and energy waste. 3. High failure rate: The thickness of parts is generally between 0.5 and 1 mm. If the gap between the ejector slider and the punch is too small, the resistance is high, affecting the unloading speed. If the gap is too large, the parts may get stuck between the ejector slider and the punch or deform. Furthermore, the rapid switching of multiple cylinders leads to unstable air pressure, which also affects normal unloading. Therefore, the overall failure rate is high.

[0005] 1.2.1 Unloading Method Based on Multiple Molds for Separate Flanging Forming: This method involves a multi-stage flanging forming process. The principle is to break down the flanging process into 2-3 separate molds for flanging (each mold only completes flanging on one side). This eliminates the problem of the engine hood outer panel being stuck on the mold punches from all four directions after a single flanging formation, allowing the robot to grasp the part and complete unloading through trajectory adjustment. Compared to the time-controlled pneumatic ejection unloading method, the overall production line speed is faster. The disadvantages of the multi-mold separate flanging forming unloading method are: 1. High cost: This method requires manufacturing 2-3 additional molds for flanging the parts separately. Each additional mold requires an additional press and a set of robots, resulting in a large footprint and extremely high investment costs. 2. Energy waste: The need for additional presses and robots leads to energy waste. Therefore, it is urgent to develop a flanging mold for engine hood outer panel parts to solve the above defects. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this invention provides a flanging die and flanging unloading method for engine hood outer panel parts. It is not only simple in structure, but also effectively improves production efficiency and reduces investment costs, meeting the requirements of environmental protection policies for a high-speed, low-energy stamping production line for passenger car engine hood outer panel parts flanging die.

[0007] This invention discloses a flanging die for an engine hood outer panel, comprising a lower die base and an upper die base. The lower die base is provided with a fixed punch, and the upper die base is provided with an upper die oblique wedge flanging cutter. It also includes two first linear modules spaced apart along the Y-axis and one second linear module extending along the X-axis, disposed between the lower die base and the upper die base. The two first linear modules are mirror-symmetrically arranged with respect to the fixed punch, and each first linear module has an included angle with the Y-axis. A wedge-shaped movable punch is connected to the moving end of each first linear module. The second linear module... The moving end of the module is connected to a horizontal movable punch. The fixed punch and the horizontal movable punch are arranged at intervals along the X-axis. The horizontal movable punch is provided with a fixed positioning extending along the Z-axis. The lower die base is provided with a floating positioning for assisting in positioning the engine hood parts. The floating positioning includes a fixed floating positioning that can only realize the Z-axis displacement degree of freedom and a stroke floating positioning that can realize both Z-axis and X-axis displacement. The upper die base is provided with an upper die floating positioning drive rod for driving the fixed floating positioning and the stroke floating positioning to move along the Z-axis.

[0008] In a preferred embodiment of the present invention, the fixed floating positioning includes a guide sleeve extending along the Z-axis. One end of the guide sleeve is connected to the lower mold base via a nitrogen spring, and the other end of the guide sleeve is connected to a positioning mounting block. A positioning rod extending along the Z-axis is provided on the positioning mounting block.

[0009] In a preferred embodiment of the present invention, the stroke floating positioning includes a guide sleeve extending along the Z-axis, one end of the guide sleeve being connected to the lower mold base via a nitrogen spring, and the other end of the guide sleeve being connected to a positioning mounting block. A stroke cylinder extending along the X-axis is provided on the positioning mounting block, and a telescopic positioning assembly is connected to the piston rod end of the stroke cylinder.

[0010] In a preferred embodiment of the present invention, the telescopic positioning assembly includes a first rod, a second rod, and a positioning rod. The first rod is fixedly connected to the piston rod end of the stroke cylinder, the second rod is fixedly connected to the first rod, and there is an included angle between the second rod and the first rod. The end of the second rod is provided with a positioning rod extending along the Z-axis.

[0011] In a preferred embodiment of the present invention, the first linear module includes a guide rail slider assembly and an inclined surface drive assembly. The guide rail slider assembly is fixed to the lower mold base and extends along the Y-axis. The sliding end of the guide rail slider assembly is connected to the inclined wedge movable punch. The inclined surface drive assembly includes an inclined wedge movable punch driven guide plate fixed to the inclined wedge movable punch, an inclined wedge movable punch drive guide plate fixed to the upper mold base, and a nitrogen spring B arranged on the lower mold base and extending parallel to the Y-axis. The inclined wedge movable punch driven guide plate and the inclined wedge movable punch drive guide plate are arranged in a one-to-one correspondence, and the inclined wedge movable punch driven guide plate and the inclined wedge movable punch drive guide plate are engaged on their inclined surfaces.

[0012] In a preferred embodiment of the present invention, the second linear module includes a horizontal sliding guide plate arranged along the X-axis and a stroke drive cylinder. The horizontal movable punch is slidably connected to the horizontal sliding guide plate, and the horizontal movable punch is connected to the piston rod end of the stroke drive cylinder.

[0013] In a preferred embodiment of the present invention, a horizontal movable punch driven guide plate is provided on the horizontal movable punch, and a horizontal movable punch driving guide plate is provided on the upper die base. The horizontal movable punch driven guide plate and the horizontal movable punch driving guide plate are arranged in a one-to-one correspondence, and the horizontal movable punch driven guide plate and the horizontal movable punch driving guide plate are engaged with each other on inclined surfaces.

[0014] In a preferred embodiment of the present invention, the fixed floating positioning includes at least three, the travel floating positioning includes at least two, and the fixed floating positioning and the travel floating positioning are arranged at intervals along the outer peripheral surface of the engine hood part.

[0015] This invention also discloses a method for unloading engine hood outer panel parts by flanging. The method uses a flanging die for engine hood outer panel parts to stamp and form the engine hood parts by flanging. The flanging angle of the formed engine hood parts is less than or equal to 90°. After the engine hood parts are flanged, when the lower die base and the upper die base separate, the inclined wedge movable punch first completes the separation of the engine hood parts from the inclined wedge movable punch under the action of nitrogen spring B. Then, the stroke drive cylinder works, and the fixed positioning on the horizontal movable punch achieves the separation of the engine hood parts from the fixed punch along the X-axis.

[0016] In a preferred embodiment of the present invention, the present invention includes a variable part positioning system, and a horizontal movable punch, a left oblique wedge movable punch, and a right oblique wedge movable punch for demolding parts in conjunction with the variable part positioning system; it also includes a lower mold base, a fixed punch, and an upper mold base for fixing the above components.

[0017] In a preferred embodiment of the present invention, the variable part positioning system is designed with two sets of positioning on each of the four sides of the fixed punch, including two sets of fixed positioning and six sets of floating positioning. The fixed positioning is installed on the horizontal movable punch; the floating positioning includes two sets of fixed floating positioning on each of the left and right sides of the lower die base and two sets of stroke floating positioning in front. Each set of fixed floating positioning consists of a nitrogen spring A, a positioning mounting block, a positioning rod, a guide sleeve, and an upper die floating positioning drive rod. The positioning rod is installed on the positioning mounting block, the positioning mounting block is installed on the guide sleeve, the guide sleeve contains the nitrogen spring A, the nitrogen spring A is installed on the lower die base, and the upper die floating positioning drive rod is installed on the upper die base at the coaxial position corresponding to the nitrogen spring A.

[0018] In a preferred embodiment of the present invention, a stroke cylinder is added to the fixed floating positioning system. The cylinder extension rod is connected to the positioning rod to form a stroke cylinder extension positioning rod.

[0019] In a preferred embodiment of the present invention, the horizontal movable punch includes a rear flanging punch, a horizontal sliding guide plate, a stroke drive cylinder, a horizontal movable punch driven guide plate, and a horizontal movable punch drive guide plate. Four inclined wedge driven guide plates are vertically installed behind the rear flanging punch, and a horizontal sliding guide plate is installed on its bottom surface. The flanging punch slider is placed on a horizontal guide surface behind the lower die base. The stroke cylinder is installed on the lower die base directly below the fixed punch, and its cylinder extension rod is connected to the flanging punch slider. The horizontal movable punch drive guide plate is installed on the upper base.

[0020] In a preferred embodiment of the present invention, the left-side oblique wedge movable punch includes a left-side flanging oblique wedge punch slider, a sliding guide plate, an oblique wedge movable punch driven guide plate, an oblique wedge movable punch drive guide plate, and a nitrogen spring B. The sliding guide plate mounted on the bottom surface of the left-side flanging punch slider contacts the left-side oblique wedge guide surface of the lower die base, and the angle between the guide surface and the horizontal angle ranges from 10° to 60°. The oblique wedge drive guide plate is vertically mounted on the flanging punch slider. The seat surface of the nitrogen spring B is fixedly mounted on the left side of the lower die base, and the elastic part contacts the left end face of the flanging punch slider.

[0021] In a preferred embodiment of the present invention, the right oblique wedge movable punch and the left oblique wedge movable punch are mirror images of each other with respect to the center line of the mold.

[0022] In a preferred embodiment of the present invention, the designed stroke of the stroke cylinders installed on the two sets of stroke floating positioning devices located in front of the punch should be equal to the movement distance of the horizontally movable punch.

[0023] In a preferred embodiment of the present invention, the movement distances of the horizontal movable punch, the left oblique wedge movable punch, and the right oblique wedge movable punch are all designed to be greater than the flange height designed for the part.

[0024] In a preferred embodiment of the present invention, when the floating positioning rises to its highest point, the upper end face of the positioning rod should be at least 50mm higher than the convex mold surface; when the mold is fully closed, when the floating positioning sinks to its lowest point, it should ensure that there is no interference between the positioning and the flange wedge, and a safety margin of 5mm should be reserved.

[0025] In a preferred embodiment of the present invention, the specific steps include:

[0026] S1, the upper die base is located at the upper limit position of the press slide; the stroke drive cylinder of the horizontal movable punch extends, causing the rear flanging punch to move away from the fixed punch; the nitrogen spring B of the left oblique wedge movable punch extends, causing the flanging oblique wedge punch slide to sink below the fixed punch; the nitrogen spring pushes the fixed floating positioning and the stroke floating positioning to the floating position; the stroke cylinder of the stroke floating positioning extends, causing the stroke cylinder extension positioning rod to approach the fixed punch; the fixed positioning then the side flanging punch moves away from the fixed punch;

[0027] S2. The part is put into the mold, and under the action of the variable part positioning system, the part is completely fitted with the fixed punch.

[0028] S3. The press starts working. The upper die base moves downward with the press slide. The inclined wedge movable punch drive guide plate on the upper die base contacts the inclined wedge movable punch driven guide plate, driving the flanging inclined wedge punch slide to move obliquely upward, so that the flanging inclined wedge punch slide, the fixed punch and the rear flanging punch are spliced ​​together to form a complete flanging punch surface; the horizontal movable punch drive guide plate on the upper die base contacts the horizontal movable punch driven guide plate, limiting the rear flanging punch; the upper die floating positioning drive rod contacts the floating positioning positioning mounting block, causing the fixed floating positioning and the stroke floating positioning to sink, in order to avoid the upper die inclined wedge flanging cutter;

[0029] S4. When the press slide moves to the lower limit position, the mold is completely closed, and the upper die oblique wedge flanging knife flanging the engine hood part to form the engine hood part flanging.

[0030] S5. The press slide begins its return stroke. The inclined wedge movable punch drive guide plate of the left inclined wedge movable punch disengages from the inclined wedge movable punch driven guide plate. Nitrogen spring B extends, pushing the flanging inclined wedge punch slide downwards, causing the flanging inclined wedge punch slide to disengage from the left flanging edge of the engine hood part. The movement of the right inclined wedge movable punch is a mirror image of the left inclined wedge movable punch about the mold centerline, causing the right flanging edge of the engine hood part to disengage. The upper mold floating positioning drive rod disengages from the positioning mounting block, causing the fixed floating positioning and stroke floating positioning to float upwards.

[0031] S6. When the press slide returns to 50%, the stroke cylinder of the stroke floating positioning retracts, so that the stroke cylinder extension positioning rod is in a position away from the fixed punch; the stroke drive cylinder of the horizontal moving punch retracts, pulling the rear flanging punch closer to the fixed punch; the fixed positioning on the rear flanging punch pushes the engine hood part forward to the position of the stroke cylinder extension positioning rod, so that the flanging of the engine hood part in front of the engine hood part is separated from the fixed punch;

[0032] S7. The press slide returns to its upper limit, the part has been unloaded, and the robot enters the mold to grab the part.

[0033] The beneficial effects of this invention are: it has the advantages of simple structure, convenient use, low cost, high precision, and high efficiency. By introducing a variable part positioning system and three cooperating movable punch components, this invention achieves horizontal displacement unloading of stamped engine hood outer panel parts. Compared with the unloading methods used in the industry, this invention solves the following problems: it firstly overcomes the disadvantages of high equipment investment costs, large footprint, and high energy consumption associated with the multi-die flanging unloading method. Secondly, compared to the time-controlled pneumatic ejector slider unloading method, which suffers from long operation time, high energy consumption, and high failure rate, this invention also has the following advantages over existing technologies: 1. It eliminates complex time-controlled pneumatic actions, eliminating unloading waiting time and increasing the production line speed SPM value from 10 to over 20; 2. The number of pneumatic drive units is reduced from 15 to 3, reducing total air consumption by 85% and significantly reducing pressure loss air energy consumption; 3. It eliminates the ejector unloading device, thus eliminating the need for a gap-fit ​​unloading structure and completely eliminating the failure rate caused by material jamming leading to robot grasping failure. Furthermore, it has significant advantages in simplifying mold universal design, accelerating mold assembly and debugging, and shortening the rapid stabilization cycle for new mold introduction. It ensures the production stability of an efficient and green factory and has great promotional value.

[0034] Furthermore, the present invention includes a lower die base and an upper die base. The lower die base is provided with a fixed punch, and the upper die base is provided with an upper die wedge-shaped flanging cutter. It also includes two first linear modules spaced apart along the Y-axis and one second linear module extending along the X-axis, disposed between the lower die base and the upper die base. The two first linear modules are arranged mirror-symmetrically with respect to the fixed punch, and each first linear module has an included angle with the Y-axis. A wedge-shaped movable punch is connected to the moving end of each first linear module, and a horizontal movable punch is connected to the moving end of the second linear module. The fixed punch and the horizontal movable punch are spaced apart along the X-axis, and the horizontal movable punch is provided with a wedge-shaped flanging cutter extending along the Z-axis. The fixed positioning system includes a floating positioning system on the lower die base to assist in positioning the engine hood parts. The floating positioning system includes a fixed floating positioning system that can only achieve Z-axis displacement and a stroke floating positioning system that can achieve Z-axis and X-axis displacement. The upper die base is equipped with an upper die floating positioning drive rod to drive the fixed floating positioning system and the stroke floating positioning system to move along the Z-axis. The fixed positioning system and the floating positioning system work together to ensure the positioning of the engine hood parts during loading and to ensure that the engine hood parts are completely fitted with the fixed punch. At the same time, the floating positioning system ensures that the upper die's oblique wedge flanging cutter will not interfere with the variable part positioning system when the engine hood parts are being formed and flanged.

[0035] Furthermore, the fixed floating positioning of the present invention includes a guide sleeve extending along the Z-axis. One end of the guide sleeve is connected to the lower mold base through a nitrogen spring, and the other end of the guide sleeve is connected to a positioning mounting block. A positioning rod extending along the Z-axis is provided on the positioning mounting block. This structural design has the advantages of simple structure, good stability and easy assembly.

[0036] Furthermore, the stroke floating positioning of the present invention includes a guide sleeve extending along the Z-axis. One end of the guide sleeve is connected to the lower die base via a nitrogen spring, and the other end of the guide sleeve is connected to a positioning mounting block. A stroke cylinder extending along the X-axis is provided on the positioning mounting block, and a telescopic positioning component is connected to the piston rod end of the stroke cylinder. This can effectively avoid interference problems when the engine hood parts are unloaded after stamping. At the same time, the structural design has the advantages of simple structure, high compatibility, good stability, and easy assembly. When combined with the fixed floating positioning, it can stably limit the engine hood parts.

[0037] Furthermore, the telescopic positioning assembly of the present invention includes a first rod, a second rod, and a positioning rod. The first rod is fixedly connected to the piston rod end of the stroke cylinder, the second rod is fixedly connected to the first rod, and there is an included angle between the second rod and the first rod. The end of the second rod is provided with a positioning rod extending along the Z-axis. This structural design can ensure its contact with various types and sizes of limiting engine hood parts, thus improving the compatibility of the present invention.

[0038] Furthermore, the first linear module of the present invention includes a guide rail slider assembly and an inclined surface drive assembly. The guide rail slider assembly is fixedly connected to the lower mold base and extends along the Y-axis. The sliding end of the guide rail slider assembly is connected to a wedge movable punch. The inclined surface drive assembly includes a wedge movable punch driven guide plate fixedly connected to the wedge movable punch, a wedge movable punch drive guide plate fixedly connected to the upper mold base, and a nitrogen spring B arranged on the lower mold base and extending parallel to the Y-axis. The wedge movable punch driven guide plate and the wedge movable punch drive guide plate are arranged in a one-to-one correspondence. The wedge movable punch driven guide plate and the wedge movable punch drive guide plate are engaged on inclined surfaces. This structural design has the advantages of compact structure and good stability.

[0039] Furthermore, the second linear module of the present invention includes a horizontal sliding guide plate and a stroke drive cylinder arranged along the X-axis. A horizontal movable punch is slidably connected to the horizontal sliding guide plate. The horizontal movable punch is connected to the piston rod end of the stroke drive cylinder. This structural design only requires one stroke drive cylinder to achieve demolding control, and has the advantage of compact structure.

[0040] Furthermore, a horizontal movable punch driven guide plate is provided on the horizontal movable punch, and a horizontal movable punch driving guide plate is provided on the upper die base. The horizontal movable punch driven guide plate and the horizontal movable punch driving guide plate are arranged in a one-to-one correspondence, and the two horizontal movable punch driven guide plates are engaged by inclined surfaces. The presence of the horizontal movable punch driven guide plate and the horizontal movable punch driving guide plate enables precise adjustment of the position of the rear flanging punch 51, thereby ensuring the accuracy of the part flanging. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a flanged mold for an engine hood outer panel part according to the present invention;

[0042] Figure 2 This is a perspective view of the upper mold of a flanged mold for an engine hood outer panel part according to the present invention;

[0043] Figure 3 This is a perspective view of the lower mold of a flanged mold for an engine hood outer panel part according to the present invention;

[0044] Figure 4 This is an assembly drawing of the lower mold component of a flanged mold for an engine hood outer panel part according to the present invention;

[0045] Figure 5 This is a perspective view of a variable part positioning system for an engine hood outer panel part flanging mold according to the present invention;

[0046] Figure 6 This is a three-dimensional view of a fixed floating positioning mold for an engine hood outer panel part according to the present invention;

[0047] Figure 7 This is an isometric view of the stroke floating positioning of a flange mold for an engine hood outer panel part according to the present invention;

[0048] Figure 8 This is a top view of the stroke floating positioning of a flange mold for an engine hood outer panel part according to the present invention;

[0049] Figure 9 This is a side view of the horizontal movable punch of a flanged die for an engine hood outer panel part according to the present invention;

[0050] Figure 10 This is a side view of the horizontal movable punch of the flange mold for an engine hood outer panel part according to the present invention;

[0051] Figure 11 This is a top view of the lower die of a flanged mold for an engine hood outer panel part according to the present invention;

[0052] Figure 12 yes Figure 11 AA section view;

[0053] Figure 13 yes Figure 11 BB cross-sectional view (Schematic diagram of unloading the left side of the engine hood part);

[0054] Figure 14 This invention relates to an engine hood outer panel part flanging mold for an engine hood part;

[0055] Figure 15 yes Figure 11 DD sectional view;

[0056] Figure 16 This is a schematic diagram of the unloading of the left side of the engine hood part in the engine hood outer panel part flange mold of the present invention;

[0057] Figure 17 This is a schematic diagram of the front flange unloading of an engine hood part using a flange mold for an engine hood outer panel part according to the present invention.

[0058] In the diagram: 1-Lower die base; 2-Upper die base; 3-Fixed punch; 4-Variable part positioning system; 5-Horizontal movable punch; 6-Left side inclined wedge movable punch; 7-Right side inclined wedge movable punch; 8-Upper die inclined wedge flanging cutter; 41-Fixed positioning; 42-Fixed floating positioning; 43-Stroke floating positioning; 44-Nitrogen spring A; 45-Guide sleeve; 46-Positioning mounting block; 47-Positioning rod; 48-Upper die floating positioning drive rod; 49-Stroke cylinder; 50 - Stroke cylinder telescopic positioning rod; 51 - Rear flanging punch; 52 - Horizontal sliding guide plate; 53 - Stroke drive cylinder; 54 - Horizontal movable punch driven guide plate; 55 - Horizontal movable punch drive guide plate; 61 - Flanging wedge punch slider; 62 - Sliding guide plate; 63 - Wedge movable punch driven guide plate; 64 - Nitrogen spring B; 65 - Inclined guide surface; 71 - Wedge movable punch drive guide plate; 100 - Engine hood part; 101 - Engine hood part flanging. Detailed Implementation

[0059] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0060] This invention discloses a flanging mold for an engine hood outer panel part, including a lower mold base 1 and an upper mold base 2. The lower mold base 1 is provided with a fixed punch 3, and the upper mold base 2 is provided with an upper mold oblique wedge flanging cutter 8. It also includes two first linear modules spaced apart along the Y-axis and one second linear module extending along the X-axis, disposed between the lower mold base 1 and the upper mold base 2. The two first linear modules are arranged mirror-symmetrically with respect to the fixed punch 3, and each first linear module has an included angle with the Y-axis (the included angle ranges from 10° to 60°). A wedge is connected to the moving end of each first linear module. The punch, the moving end of the second linear module is connected to a horizontal movable punch 5, the fixed punch 3 and the horizontal movable punch 5 are arranged at intervals along the X-axis, the horizontal movable punch 5 is provided with a fixed positioning 41 extending along the Z-axis, the lower die base 1 is provided with a floating positioning for assisting in positioning the engine hood part 100, the floating positioning includes a fixed floating positioning 42 that can only realize the Z-axis displacement degree of freedom and a stroke floating positioning 43 that can realize Z-axis and X-axis displacement, the upper die base 2 is provided with an upper die floating positioning drive rod 48 for driving the fixed floating positioning 42 and the stroke floating positioning 43 to move along the Z-axis. Figure 3 As shown, the X-axis is Figure 3 The front-back direction in the middle, the Y-axis is Figure 3 The left and right directions, and the Z-axis is Figure 3 The vertical direction perpendicular to the plane containing the X and Y axes can be understood as the X, Y, and Z axes forming a Cartesian coordinate system.

[0061] Preferably, the fixed floating positioning 42 includes a guide sleeve 45 extending along the Z-axis. One end of the guide sleeve 45 is connected to the lower mold base 1 via a nitrogen spring, and the other end of the guide sleeve 45 is connected to a positioning mounting block 46. A positioning rod 47 extending along the Z-axis is provided on the positioning mounting block 46.

[0062] Preferably, the stroke floating positioning 43 includes a guide sleeve 45 extending along the Z-axis. One end of the guide sleeve 45 is connected to the lower mold base 1 via a nitrogen spring, and the other end of the guide sleeve 45 is connected to a positioning mounting block 46. A stroke cylinder 49 extending along the X-axis is provided on the positioning mounting block 46, and a telescopic positioning assembly is connected to the piston rod end of the stroke cylinder 49.

[0063] Preferably, the telescopic positioning assembly includes a first rod, a second rod, and a positioning rod. The first rod is fixedly connected to the piston rod end of the stroke cylinder 49, the second rod is fixedly connected to the first rod, and there is an included angle between the second rod and the first rod. The end of the second rod is provided with a positioning rod extending along the Z-axis.

[0064] Preferably, the first linear module includes a guide rail slider assembly and an inclined plane drive assembly. The guide rail slider assembly is fixed to the lower mold base 1 and extends along the Y-axis. The sliding end of the guide rail slider assembly is connected to a wedge movable punch. The inclined plane drive assembly includes a wedge movable punch driven guide plate 63 fixed to the wedge movable punch, a wedge movable punch drive guide plate 71 fixed to the upper mold base 2, and a nitrogen spring B64 arranged on the lower mold base 1 and extending parallel to the Y-axis. The wedge movable punch driven guide plate 63 and the wedge movable punch drive guide plate 71 are arranged in a one-to-one correspondence, and the wedge movable punch driven guide plate 63 and the wedge movable punch drive guide plate 71 are engaged by inclined surfaces.

[0065] Preferably, the second linear module includes a horizontal sliding guide plate 52 arranged along the X-axis and a stroke drive cylinder 53. A horizontal movable punch 5 is slidably connected to the horizontal sliding guide plate 52, and the horizontal movable punch 5 is connected to the piston rod end of the stroke drive cylinder 53.

[0066] Preferably, a horizontal movable punch driven guide plate 54 is provided on the horizontal movable punch 5, and a horizontal movable punch driving guide plate 55 is provided on the upper die base 2. The horizontal movable punch driven guide plate 54 and the horizontal movable punch driving guide plate 55 are arranged in a one-to-one correspondence, and the horizontal movable punch driven guide plate 54 and the horizontal movable punch driving guide plate 55 are engaged by inclined surfaces.

[0067] Preferably, at least three fixed floating positions 42 are included, and at least two travel floating positions 43 are included. The fixed floating positions 42 and travel floating positions 43 are arranged at intervals along the outer peripheral surface of the engine hood part 100.

[0068] This invention also discloses a method for unloading engine hood outer panel parts by flanging. The method uses an engine hood outer panel part flanging die to stamp engine hood part 100 into engine hood part flanging 101. The angle of the formed engine hood part flanging 101 is less than or equal to 90°. After the engine hood part flanging 101 is completed, when the lower die base 1 and the upper die base 2 are separated, the inclined wedge movable punch first completes the separation of engine hood part flanging 101 and inclined wedge movable punch under the action of nitrogen spring B64. Then, the stroke drive cylinder 53 works, and the fixed positioning 41 on the horizontal movable punch 5 realizes the separation of engine hood part flanging 101 from fixed punch 3 along the X-axis of engine hood part 100.

[0069] Preferably, the specific steps include:

[0070] S1, the upper die base 2 is located at the limit position of the press slide; the stroke drive cylinder 53 of the horizontal movable punch 5 extends, causing the rear flanging punch 51 to move away from the fixed punch 3; the nitrogen spring B64 of the left oblique wedge movable punch 6 extends, causing the flanging oblique wedge punch slide 61 to sink below the fixed punch 3; the nitrogen spring 44 pushes the fixed floating positioning 42 and the stroke floating positioning 43 to the floating position; the stroke cylinder 49 of the stroke floating positioning 43 extends, causing the stroke cylinder telescopic positioning rod 50 to approach the fixed punch 3; the fixed positioning 41 then moves the flanging punch 51 away from the fixed punch 3;

[0071] S2. The part is put into the mold, and under the action of the variable part positioning system 4, the part is completely fitted with the fixed punch 3.

[0072] S3. The press starts working. The upper die base 2 moves downward with the press slide. The inclined wedge movable punch drive guide plate 71 on the upper die base 2 contacts the inclined wedge movable punch driven guide plate 63, driving the flanging inclined wedge punch slide 61 to move obliquely upward, so that the flanging inclined wedge punch slide 61 splices with the fixed punch 3 and the rear flanging punch 51 to form a complete flanging punch surface. The horizontal movable punch drive guide plate 55 on the upper die base 2 contacts the horizontal movable punch driven guide plate 54, limiting the rear flanging punch 51. The upper die floating positioning drive rod 48 contacts the floating positioning positioning mounting block 46, causing the fixed floating positioning 42 and the stroke floating positioning 43 to sink, in order to avoid the upper die inclined wedge flanging cutter 8.

[0073] S4. When the press slide moves to the lower limit position, the mold is completely closed, and the upper die oblique wedge flanging knife 8 flanging and forming the engine hood part 101 on the engine hood part 100.

[0074] S5. The press slide begins its return stroke. The inclined wedge movable punch drive guide plate 71 of the left inclined wedge movable punch 6 disengages from the inclined wedge movable punch driven guide plate 63. The nitrogen spring B64 extends, pushing the flange inclined wedge punch slide 61 downward, causing the flange inclined wedge punch slide 61 to disengage from the left flange 101 of the engine hood part. The movement of the right inclined wedge movable punch 7 is a mirror image of the left inclined wedge movable punch 6 with respect to the mold centerline, causing the right flange 101 of the engine hood part to disengage. The upper mold floating positioning drive rod 48 disengages from the positioning mounting block 46, causing the fixed floating positioning 42 and the stroke floating positioning 43 to float upward.

[0075] S6. When the press slide returns to 50%, the stroke cylinder 49 of the stroke floating positioning 43 retracts, so that the stroke cylinder extension positioning rod 50 is in a position away from the fixed punch 3; the stroke drive cylinder 53 of the horizontal movable punch 5 retracts, pulling the rear flanging punch 51 closer to the fixed punch 3; the fixed positioning 41 on the rear flanging punch 51 pushes the engine hood part 100 forward to the position of the stroke cylinder extension positioning rod 50, so that the engine hood part flanging 101 in front of the engine hood part 100 disengages from the fixed punch 3;

[0076] S7. The press slide returns to its upper limit, the part has been unloaded, and the robot enters the mold to grab the part.

[0077] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0078] like Figure 1-3 The high-speed, low-energy-consumption passenger vehicle engine hood outer panel part flanging die shown includes a fixed punch 3 mounted on the lower die base 1, a variable part positioning system 4, a horizontal movable punch 5, a left oblique wedge movable punch 6, a right oblique wedge movable punch 7, an upper die floating positioning drive rod 48 mounted on the upper die base 2, a horizontal movable punch drive guide plate 55, an oblique wedge movable punch drive guide plate 71, and an upper die oblique wedge flanging cutter 8.

[0079] like Figure 4 The fixed punch 3 is fixedly installed in the middle of the lower die base 1. The horizontal movable punch 5 is placed on the horizontal guide surface of the lower die base 1 behind the fixed punch 3. The left inclined wedge movable punch 6 and the right inclined wedge movable punch 7 are respectively placed on the inclined guide surfaces 65 on the left and right sides of the lower die base 1. The angle between the inclined guide surface 65 and the horizontal XY plane is 10°~60°.

[0080] like Figure 1-7 The variable part positioning system 4 shown has two fixed positioning units 41 installed on the horizontal movable punch 5 behind the fixed punch 3; two sets of fixed floating positioning units 42 are installed on the lower die base 1 on both sides of the fixed punch 3. The fixed floating positioning units 42 are composed of a nitrogen spring A 44, a positioning mounting block 46, a positioning rod 47, a guide sleeve 45, and an upper die floating positioning drive rod 48. The positioning rod 47 is installed on the positioning mounting block 46, the positioning mounting block 46 is installed on the guide sleeve 45, the nitrogen spring A 44 is placed inside the guide sleeve 45, the nitrogen spring A 44 is installed on the lower die base 1, and the upper die floating positioning drive rod 48 is installed on the upper die base 2 corresponding to the coaxial position of the nitrogen spring A 44; two sets of stroke floating positioning units 43 are installed on the lower die base 1 in front of the fixed punch 3. The stroke floating positioning units 43 are formed by replacing the positioning rod 47 of the fixed floating positioning units 42 with a stroke cylinder 49 and a stroke cylinder telescopic positioning rod 50.

[0081] like Figure 8-10 The horizontal movable punch 5 shown includes: a rear flanging punch 51 for flanging the rear side of the engine hood part; a horizontal movable punch driven guide plate 54 for ensuring the stamping position accuracy; a horizontal sliding guide plate 52 installed below the horizontal movable punch 5 to ensure smooth sliding; and a stroke drive cylinder 53 installed on the lower die base 1 and located directly below the fixed punch 3 for providing driving force.

[0082] like Figure 11-13 The left-side oblique wedge movable punch 6 includes: a flanging oblique wedge punch slider 61 for flanging the left side of the engine hood part 100; an oblique wedge movable punch driven guide plate 63 for driving the flanging oblique wedge punch slider 61 to move upward and to the left along the oblique guide surface 65 on the left side of the lower die base 1; an oblique wedge movable punch drive guide plate 71 mounted on the upper die base 2 for driving the oblique wedge movable punch driven guide plate 63; a sliding guide plate 62 mounted below the flanging oblique wedge punch slider 61 to ensure smooth sliding; and a nitrogen spring B 64 for pushing the flanging oblique wedge punch slider 61 to move downward and to the right along the oblique guide surface 65. The right-side oblique wedge movable punch 7 and the left-side oblique wedge movable punch 6 are mirror images of each other with respect to the die centerline.

[0083] like Figure 14-15 The image shows that after the engine hood part 100 is formed by flanging, engine hood part flanges 101 are formed around the part.

[0084] Stamping process parameter design:

[0085] The position settings of the variable part positioning system 4 in the feeding preparation state are as follows: the positioning parts of the fixed positioning 41, the fixed floating positioning 42, and the stroke floating positioning 43 should maintain a gap of 0.5mm with the outline of the trimmed part in the previous process, and the top of the positioning guide part should be higher than the highest point of the part.

[0086] The extension and retraction of the stroke cylinder 49 of the stroke floating positioning 43 is equal to the extension and retraction of the stroke drive cylinder 53 of the horizontal movable punch 5, and ensures that the extension and retraction is greater than the length of the part flange 101 by about 3mm or more.

[0087] The displacement of the left and right inclined wedge movable punches 6 and 7 is equal to the thickness of the driven guide plate 63 of the inclined wedge movable punch, and the displacement is more than 3 mm greater than the length of the part flange 101. At the same time, when the flange inclined wedge punch slider 61 rises to its highest point, it should be aligned with the fixed punch 3 (without step difference), and the working length of the nitrogen spring B 64 should be 20% greater than the thickness of the driven guide plate 63 of the inclined wedge movable punch.

[0088] Mold working process:

[0089] S1, Material Feeding Preparation State: The upper die base 2 is located at the upper limit position of the press slide; the stroke drive cylinder 53 of the horizontal movable punch 5 extends, causing the rear flanging punch 51 to move away from the fixed punch 3; the nitrogen spring B 64 of the left oblique wedge movable punch 6 extends, causing the flanging oblique wedge punch slide 61 to sink below the fixed punch 3 (at this time, the flanging oblique wedge punch slide 61 and the fixed punch 3 have a step difference); the right oblique wedge movable punch 7 is the same as the left oblique wedge movable punch 6; the nitrogen spring A 44 pushes the fixed floating positioning 42 and the stroke floating positioning 43 to the floating position; the stroke cylinder 49 of the stroke floating positioning 43 extends, causing the stroke cylinder extension positioning rod 50 to approach the fixed punch 3; the fixed positioning 41 then moves the flanging punch 51 away from the fixed punch 3.

[0090] S2. The part is put into the mold, and under the action of the variable part positioning system 4, the part is completely attached to the fixed punch 3.

[0091] S3. The press starts working, and the upper die base 2 moves downward with the press slide. The inclined wedge movable punch drive guide plate 71 on the upper die base 2 contacts the inclined wedge movable punch driven guide plate 63, driving the flange inclined wedge punch slide 61 to move obliquely upward (e.g., Figure 13 As shown), the slanting wedge punch slider 61 is spliced ​​with the fixed punch 3 and the rear slanting punch 51 to form a complete slanting punch surface; the horizontal movable punch drive guide plate 55 on the upper die base 2 contacts the horizontal movable punch driven guide plate 54 (the stroke drive cylinder 53 realizes coarse adjustment, and the horizontal movable punch drive guide plate 55 and the horizontal movable punch driven guide plate 54 cooperate with the position of the rear slanting punch 51 to ensure the accuracy of the part flanging), limiting the rear slanting punch 51; the upper die floating positioning drive rod 48 contacts the floating positioning positioning mounting block 46, causing the fixed floating positioning 42 and the stroke floating positioning 43 to sink, in order to avoid the upper die slanting wedge flanging cutter 8 (avoiding interference from the slanting wedge flanging cutter 8 positioning rod 47).

[0092] S4. When the press slide reaches its lower limit position, the mold is completely closed. The upper die oblique wedge flanging cutter 8 flanging and forming the engine hood part 101 on the engine hood part 100.

[0093] S5. The press slide begins its return stroke. The inclined wedge movable punch drive guide plate 71 of the left inclined wedge movable punch 6 disengages from the inclined wedge movable punch driven guide plate 63. The nitrogen spring B 64 extends, pushing the flange inclined wedge punch slide 61 downward, causing the flange inclined wedge punch slide 61 to disengage from the left flange of the engine hood part (e.g., Figure 15 (As shown); the movement of the right inclined wedge movable punch 7 and the left inclined wedge movable punch 6 are mirror images of each other with respect to the mold centerline, causing the right edge of the engine hood part to detach; the upper mold floating positioning drive rod 48 detaches from the positioning mounting block 46, causing the fixed floating positioning 42 and the stroke floating positioning 43 to float upward.

[0094] S6. When the press slide returns to 50%, the stroke cylinder 49 of the stroke floating positioning 43 retracts, causing the stroke cylinder extension positioning rod 50 to be positioned away from the fixed punch 3; the stroke drive cylinder 53 of the horizontal movable punch 5 retracts, pulling the rear flanging punch 51 closer to the fixed punch 3; the fixed positioning 41 on the rear flanging punch 51 pushes the engine hood part 100 forward to the position of the stroke cylinder extension positioning rod 50, causing the engine hood part flange 101 in front of the engine hood part 100 to disengage from the fixed punch 3 (e.g., Figure 16 (As shown).

[0095] S7. The press slide returns to its upper limit, the part has been unloaded, and the robot enters the mold to grab the part.

[0096] Those skilled in the art will readily understand that the above are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, combinations, substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A flanged die for an engine hood outer panel, comprising a lower die base (1) and an upper die base (2), wherein the lower die base (1) is provided with a fixed punch (3), and the upper die base (2) is provided with an upper die oblique wedge flanged die (8), characterized in that: It also includes two first linear modules extending along the Y-axis and one second linear module extending along the X-axis, disposed between the lower mold base (1) and the upper mold base (2). The two first linear modules are arranged mirror-symmetrically with respect to the fixed punch (3). Each first linear module has an included angle with the Y-axis. The moving end of each first linear module is connected to a wedge-shaped movable punch. The moving end of the second linear module is connected to a horizontal movable punch (5). The fixed punch (3) and the horizontal movable punch (5) are arranged at intervals along the X-axis. The horizontal movable punch (5) is provided with a wedge extending along the Z-axis. A fixed positioning (41) is provided on the lower die base (1) to support and position the engine hood part (100) during unloading, so as to realize the horizontal displacement unloading of the engine hood part (100) from the fixed punch (3) when the die is opened. A floating positioning is provided on the lower die base (1) to assist in positioning the engine hood part (100). The floating positioning includes a fixed floating positioning (42) that can only realize the Z-axis displacement degree of freedom and a stroke floating positioning (43) that can realize Z-axis and X-axis displacement. A driving fixed floating positioning (42) and a stroke floating positioning are provided on the upper die base (2). Positioning (43) is a floating positioning drive rod (48) for the upper mold that is displaced along the Z-axis; the fixed floating positioning (42) includes a guide sleeve (45) extending along the Z-axis, one end of the guide sleeve (45) being connected to the lower mold base (1) via a nitrogen spring, and the other end of the guide sleeve (45) being connected to a positioning mounting block (46), on which a positioning rod (47) extending along the Z-axis is provided; the stroke floating positioning (43) includes a guide sleeve (45) extending along the Z-axis, one end of the guide sleeve (45) being connected to the lower mold base (1) via a nitrogen spring. The mold base (1) is connected, and the other end of the guide sleeve (45) is connected to a positioning mounting block (46). The positioning mounting block (46) is provided with a stroke cylinder (49) extending along the X-axis. The piston rod end of the stroke cylinder (49) is connected to a telescopic positioning assembly. The telescopic positioning assembly includes a first rod, a second rod and a positioning rod. The first rod is fixedly connected to the piston rod end of the stroke cylinder (49), the second rod is fixedly connected to the first rod, and there is an included angle between the second rod and the first rod. The end of the second rod is provided with a positioning rod extending along the Z-axis.The engine hood part (100) is stamped and formed into an engine hood part flange (101) using an engine hood outer panel part flange die. The flange angle of the formed engine hood part flange (101) is less than or equal to 90°. After the engine hood part flange (101) is completed, when the lower die base (1) and the upper die base (2) separate, the inclined wedge movable punch first completes the separation of the engine hood part flange (101) and the inclined wedge movable punch under the action of nitrogen spring B (64). Then, the stroke drive cylinder (53) works, and the fixed positioning (41) on the horizontal movable punch (5) moves along the X-axis of the engine hood part (100) to realize the separation of the engine hood part flange (101) from the fixed punch (3).

2. The engine hood outer panel part flanging die according to claim 1, characterized in that: The first linear module includes a guide rail slider assembly and an inclined surface drive assembly. The guide rail slider assembly is fixed to the lower mold base (1) and extends along the Y-axis. The sliding end of the guide rail slider assembly is connected to the inclined wedge movable punch. The inclined surface drive assembly includes an inclined wedge movable punch driven guide plate (63) fixed to the inclined wedge movable punch, an inclined wedge movable punch drive guide plate (71) fixed to the upper mold base (2), and a nitrogen spring B (64) arranged on the lower mold base (1) and extending parallel to the Y-axis. The inclined wedge movable punch driven guide plate (63) and the inclined wedge movable punch drive guide plate (71) are arranged in a one-to-one correspondence. The inclined wedge movable punch driven guide plate (63) and the inclined wedge movable punch drive guide plate (71) are inclined surface engaged.

3. The engine hood outer panel part flanging die according to claim 1, characterized in that: The second linear module includes a horizontal sliding guide plate (52) arranged along the X-axis and a stroke drive cylinder (53). The horizontal sliding guide plate (52) is slidably connected to the horizontal movable punch (5), and the horizontal movable punch (5) is connected to the piston rod end of the stroke drive cylinder (53).

4. The flanging die for the outer panel of the engine hood according to claim 3, characterized in that: The horizontal movable punch (5) is provided with a horizontal movable punch driven guide plate (54), and the upper die base (2) is provided with a horizontal movable punch driving guide plate (55). The horizontal movable punch driven guide plate (54) and the horizontal movable punch driving guide plate (55) are arranged in a one-to-one correspondence, and the horizontal movable punch driven guide plate (54) and the horizontal movable punch driving guide plate (55) are engaged with each other on an inclined surface.

5. The flanging die for the outer panel of the engine hood according to claim 1, characterized in that: The fixed floating position (42) includes at least three, and the travel floating position (43) includes at least two. The fixed floating position (42) and the travel floating position (43) are arranged at intervals along the outer peripheral surface of the engine hood part (100).

6. The flanging die for the outer panel of the engine hood according to claim 5, characterized in that: The specific steps include, S1, the upper die base (2) is located at the limit position of the press slide; the stroke drive cylinder (53) of the horizontal movable punch (5) extends, so that the rear flanging punch (51) moves away from the fixed punch (3); the nitrogen spring B (64) of the left oblique wedge movable punch (6) extends, so that the flanging oblique wedge punch slide (61) sinks below the fixed punch (3); the nitrogen spring (44) pushes the fixed floating positioning (42) and the stroke floating positioning (43) to the floating position; the stroke cylinder (49) of the stroke floating positioning (43) extends, so that the stroke cylinder telescopic positioning rod (50) moves close to the fixed punch (3); the fixed positioning (41) then the side flanging punch (51) moves away from the fixed punch (3); S2. The part is put into the mold, and under the action of the variable part positioning system (4), the part is completely attached to the fixed punch (3); S3. The press starts working. The upper die base (2) moves downward with the press slide. The inclined wedge movable punch drive guide plate (71) on the upper die base (2) contacts the inclined wedge movable punch driven guide plate (63), driving the flanging inclined wedge punch slide (61) to move obliquely upward, so that the flanging inclined wedge punch slide (61) splices with the fixed punch (3) and the rear flanging punch (51) to form a complete flanging punch surface. The horizontal movable punch drive guide plate (55) on the upper die base (2) contacts the horizontal movable punch driven guide plate (54), limiting the rear flanging punch (51). The upper die floating positioning drive rod (48) contacts the floating positioning positioning mounting block (46), causing the fixed floating positioning (42) and the stroke floating positioning (43) to sink, which is used to avoid the upper die inclined wedge flanging knife (8). S4. When the press slide moves to the lower limit position, the mold is completely closed, and the upper die oblique wedge flanging knife (8) flanging and forming the engine hood part flanging (101) on the engine hood part (100). S5. The press slide begins to return. The inclined wedge movable punch drive guide plate (71) of the left inclined wedge movable punch (6) disengages from the inclined wedge movable punch driven guide plate (63). The nitrogen spring B (64) extends and pushes the flange inclined wedge punch slide (61) to sink, so that the flange inclined wedge punch slide (61) disengages from the left flange of the engine hood part. The movement of the right inclined wedge movable punch (7) is a mirror image of the left inclined wedge movable punch (6) with respect to the mold centerline, so that the right flange of the engine hood part disengages. The upper mold floating positioning drive rod (48) disengages from the positioning mounting block (46), so that the fixed floating positioning (42) and the stroke floating positioning (43) float up. S6. When the press slide returns to 50%, the stroke cylinder (49) of the stroke floating positioning (43) retracts, so that the stroke cylinder extension positioning rod (50) is in a position away from the fixed punch (3); the stroke drive cylinder (53) of the horizontal movable punch (5) retracts, pulling the rear flanging punch (51) closer to the fixed punch (3); the fixed positioning (41) on the rear flanging punch (51) pushes the engine hood part (100) forward to the position of the stroke cylinder extension positioning rod (50), so that the engine hood part flanging (101) in front of the engine hood part (100) disengages from the fixed punch (3); S7. The press slide returns to its upper limit, the part has been unloaded, and the robot enters the mold to grab the part.

Images