Punching device for tubular front beam of automobile

Abstract

The application relates to the technical field of automobile part manufacturing, and discloses a punching device for an automobile tubular front cross beam, which comprises a punching component, the punching component comprises a moving die and a fixed die, the fixed die comprises a bottom plate and two groups of moving half-molds which are guided to slide on the bottom plate and can be relatively and synchronously close to or far away from each other, coaxially protruding cylinders with punching holes are arranged on the opposite sides of the two groups of moving half-molds respectively, the two coaxially-arranged cylinders form a mold core, a material lifting mechanism is arranged on the bottom plate and vertically lifts and falls at the centers of the two groups of moving half-molds, the material lifting mechanism comprises a fixed plate and a turnover plate which is hinged to the fixed plate through a shaft, the turnover plate can be turned up to be V-shaped with the fixed plate or turned down to be an inclined surface which is downwardly inclined with the fixed plate, feeding mechanisms which deliver the cross beams to the material lifting mechanism and collecting mechanisms which receive the cross beams released by the material lifting mechanism are arranged on the two sides of the punching component, the device has high automation degree, can significantly reduce the labor, and improves the continuity and efficiency of operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts manufacturing, and in particular to a punching device for a tubular front cross beam of an automobile. BACKGROUND

[0002] A tubular front cross beam assembly of a front subframe is disclosed in Chinese Patent No. CN208746081U, which includes a tubular cross beam with a circular cross section. The two ends of the cross beam are generally hinged to swing arms through ball bearings, and the swing arms can move freely around the axis of the cross beam. The main function of the cross beam is to limit the radial displacement of the swing arms.

[0003] The outer ring wall of the cross beam needs to be punched near the two ends. The existing punching equipment for the cross beam has a structure as shown in Figure 1 The existing punching equipment for the cross beam has a structure as shown in Before punching, an operator needs to take a cross beam, insert it into the hollow circular rod 3 from the end of the hollow circular rod 3 until it reaches the preset depth, then manually press the control button to lower the upper die for clamping, and after the punching is completed and the movable die is raised, the operator takes out the cross beam from the hollow circular rod 3 and places it in a storage trolley. The above operation is repeated for another cross beam that has not been punched.

[0004] During the entire process, the operator needs to take the workpiece, insert and position the workpiece, start the equipment, unload the workpiece, and place the workpiece. The labor intensity of the operator is high and the efficiency is low. In general assembly lines, it is difficult to achieve automatic feeding and unloading of such tubular parts, and there is room for improvement. SUMMARY

[0005] The present application provides a punching device for a tubular front cross beam of an automobile, which can realize automatic feeding and unloading.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] The application discloses a punching device for a tubular front beam of an automobile, which comprises a punching assembly, the punching assembly comprising a movable die provided with a punch and capable of lifting movement, and a fixed die provided with a die core below the movable die, the fixed die comprising a base plate and two groups of movable half-molds slidingly guided on the base plate and capable of synchronous relative approaching or moving away, the two groups of movable half-molds being coaxially provided with a cylindrical punch hole on the opposite sides, the two cylinders being coaxially arranged and forming the die core, and a material lifting mechanism vertically lifting on the base plate and at the center of the two groups of movable half-molds, the material lifting mechanism being used for positioning and lifting a beam to be coaxial with the die core, the material lifting mechanism comprising a fixed seat, a fixed plate fixed on the fixed seat, and a turnover plate hinged on the fixed plate through a shaft, the turnover plate being capable of being turned up to form a V shape with the fixed plate or being turned down to form an inclined surface with the fixed plate, and the punching assembly being provided with a feeding mechanism on both sides, the feeding mechanism being capable of temporarily storing a plurality of beams and sequentially delivering the beams to the material lifting mechanism, and a collecting mechanism capable of sequentially receiving one beam released by the material lifting mechanism and temporarily storing a plurality of beams.

[0008] According to the above scheme, the feeding mechanism sequentially releases the temporarily stored beams to the material lifting mechanism in the V shape, the two groups of movable half-molds are relatively close to each other, and the material lifting mechanism is lifted, when the material lifting mechanism is lifted to the position where the cylinders of the two groups of movable half-molds are inserted into the two ends of the beam, the movable half-molds continue to relatively approach until the punch holes of the cylinders are moved to the punching positions of the beam, then the movable die is lowered to punch, the movable half-molds are relatively far away from each other until the material lifting mechanism is completely separated from the material lifting mechanism, then the material lifting mechanism is lowered to the maximum stroke, the turnover plate is turned down, and the beam is lowered to the collecting mechanism, the device can realize the punching operation of the tubular front beam of the automobile, automatically deliver the temporarily stored beams to the die core one by one, and realize the positioning and installation of the die core, and can realize the automatic separation of the beam from the die core and the conveying and temporary storage of the separated beam, the degree of automation is high, the labor can be significantly reduced, and the continuity and efficiency of the operation can be improved.

[0009] Preferably, the vertical lifting of the material lifting mechanism and the synchronous relative approaching or moving away of the movable half-molds are controlled by a linkage control mechanism, the linkage control mechanism comprising a rotating member vertically rotating on the base plate, a pulling and winding assembly arranged between the rotating member and the movable half-molds and capable of realizing the synchronous relative approaching or moving away of the movable half-molds by the forward and reverse rotation of the rotating member, and a lifting assembly arranged between the material lifting mechanism, the rotating member and the base plate and capable of realizing the lifting movement of the material lifting mechanism by the forward and reverse rotation of the rotating member, an adsorption bidirectional slipping structure is arranged between the lifting assembly and the rotating member, when the end of the cylinder is inserted into the end of the beam carried by the material lifting mechanism, the material lifting mechanism stops lifting, and when the end of the cylinder is separated from the end of the beam carried by the material lifting mechanism, the material lifting mechanism starts to descend, and the rotation of the rotating member is controlled by a first driving motor.

[0010] With the above scheme, the linkage control mechanism links the reciprocating movement of the moving half-mold and the lifting of the material lifting mechanism by means of a first driving motor and a series of mechanical structures, and compensates for the stroke difference generated in the cooperation of the material lifting mechanism and the moving half-mold by means of the adsorption bidirectional slipping structure when the beam is adsorbed. That is, due to the presence of the adsorption bidirectional slipping structure, when the two cylinders are relatively close, the material lifting mechanism is synchronously driven to rise; after the two cylinders are inserted into the beam from both ends at the same time, the cylinders limit the longitudinal movement of the beam, and the beam generates a pressure to limit the rising of the material lifting mechanism, and the adsorption bidirectional slipping structure slips to keep the material lifting mechanism at the current height in a relatively static state; before the two cylinders are relatively far away and are not separated from the beam, the cylinders still limit the longitudinal movement of the beam, and at this time, the adsorption force of the adsorption bidirectional slipping structure causes the material lifting mechanism to continue to keep the current height in a relatively static state; after the cylinders are separated from the beam, the material lifting mechanism adsorbs the product and simultaneously carries the product to descend.

[0011] Preferably, the pulling and winding assembly comprises a winding ring groove recessed concentrically on the outer ring wall of the rotating member, and a first pulling rope fixed at one end to the moving half-mold and at the other end to the winding ring groove. Limiting plates are vertically fixed on the upper end face of the base plate at both ends of the material lifting mechanism. A reset spring is arranged between the moving half-mold and the limiting plates and is fixed at both ends to them.

[0012] With the above scheme, with forward rotation of the rotating member, the winding ring groove synchronously and equally winds the two first pulling ropes, and the two moving half-molds synchronously relatively approach and the speed and stroke when approaching are consistent. With reverse rotation of the rotating member, the moving half-molds relatively move away under the resetting action of the two reset springs.

[0013] Preferably, the lifting assembly comprises a first screw rod vertically arranged and fixed at the upper end to the fixed seat and at the lower end to the rotating member. A through groove with a circular cross section is vertically arranged on the rotating member. A threaded sleeve matched with the first screw rod is inserted into the through groove. The adsorption bidirectional slipping structure comprises an electromagnet arranged on the fixed plate and / or the turnover plate and capable of adsorbing the beam when powered, and a bidirectional slipping structure arranged between the through groove and the threaded sleeve. A guide column is vertically downwardly protruded at the lower end of the fixed seat. A guide sleeve vertically guiding the insertion of the guide column is fixed on the base plate.

[0014] With the above scheme, in the lifting assembly, the first screw rod moves up and down in combination with the rotation of the rotating member and the guiding cooperation of the guide column and the guide sleeve. The electromagnet can adsorb and fix the beam on the material lifting mechanism when powered, and release the beam to the material lifting mechanism when the electromagnet is de-energized and the turnover plate is turned over. The bidirectional slipping structure can realize the switching of the first screw rod from the lifting state to the rotating state, so that the material lifting mechanism keeps relatively static in the vertical direction.

[0015] Preferably, the bidirectional slipping structure comprises a receiving groove recessed on the inner wall of the through groove, a limiting groove arranged on the outer ring wall of the inner threaded sleeve, and a limiting block elastically extended into the receiving groove and partially extended out of the receiving groove and embedded into the limiting groove, and a guide slope is arranged on the end of the limiting block facing the limiting groove and on both sides of the rotating direction of the rotating member.

[0016] With the above scheme, in normal state, the limiting block is simultaneously inserted into the rotating member and the inner threaded sleeve, the rotating member and the inner threaded sleeve temporarily become an integrated body and are in threaded cooperation with the first screw rod, the rotating member rotates in combination with the guide column and the guide sleeve in the guiding cooperation, and the first screw rod moves up and down; when the first screw rod cannot move up and down due to pressure or suction force, the first screw rod and the inner threaded sleeve cannot move in the vertical direction, and the torsion between the inner threaded sleeve and the rotating member continuously increases until the limiting block is guided out of the limiting groove by the guide slope, and the first screw rod and the inner threaded sleeve can only keep relative static and simultaneously rotate horizontally relative to the rotating member.

[0017] Preferably, the adjusting assembly for synchronously adjusting the initial distance between the moving half mold and the material lifting mechanism after reset is arranged on the bottom plate, the adjusting assembly comprises a movable pulley arranged on each first pull rope and a driving assembly for driving the two movable pulleys to move synchronously, the driving assembly comprises two guide moving rods arranged in parallel and moving in the direction perpendicular to the moving direction of the moving half mold, an adjusting plate fixed at one end of the two guide moving rods, and a third screw rod screwed on the adjusting plate, one end of the third screw rod is rotationally connected with the bottom plate, and the other end of the third screw rod is drivingly connected with the second driving motor, and one movable pulley is arranged on each guide moving rod and the distance from the two movable pulleys to the adjusting plate is consistent.

[0018] With the above scheme, when the pipe diameter or length of the cross beam is different, the timing of the cylinder inserted into the cross beam is affected, and the movement of the cylinder is linked with the lifting of the material lifting mechanism, so it is necessary to ensure that the cylinder is inserted into the cross beam at the time when the material lifting mechanism delivers the cross beam to the required height, and the rotation of the second driving motor in the adjusting assembly can simultaneously and with the same displacement move the two movable pulleys, thereby synchronously and with the same amount adjusting the initial distance between the moving half mold and the material lifting mechanism (the initial distance corresponding to the cross beam with different lengths or pipe diameters is different), and according to the adjustment of the initial distance, the stroke difference caused by the cooperation of the moving half mold and the material lifting mechanism due to the cross beam with different lengths or pipe diameters is eliminated, and it is ensured that when the cylinder contacts the end of the cross beam, the material lifting mechanism delivers the cross beam to the height for abutting against the cylinder.

[0019] Preferably, the upward turning of the turnover plate and the limiting of the upward turning are controlled by a driving mechanism, and the downward turning of the turnover plate is controlled by its own weight, and the fixed seat has a supporting slope for supporting the turnover plate when the turnover plate is downward turned to form a downward inclined slope with the fixed plate.

[0020] As preferred, the driving mechanism comprises swing arms formed by vertically folding two ends of the shaft and a connecting rod penetrating through the two ends of the fixing base, two ends of the connecting rod are fixedly connected with the two swing arms away from the one end of the shaft, a displacement arc groove is arranged on the fixing base to allow the connecting rod to revolve around the shaft, a pulling assembly is arranged on the fixing base to drive the connecting rod to rotate to a certain angle to make the driving turnover plate turn over, the pulling assembly comprises a second pulling rope, a cylinder fixed on the bottom plate and a pulley set for reversing, the piston rod of the cylinder is vertically upwardly arranged, the pulley set comprises a first reversing pulley and a second reversing pulley arranged on the fixing base at the end of the connecting rod away from the cylinder and below the cylinder respectively, one end of the second pulling rope is fixed on the connecting rod and the other end is fixedly connected with the end of the piston rod of the cylinder after winding around the first reversing pulley and the second reversing pulley respectively.

[0021] By the above scheme, it is very important to stably turn over the turnover plate and keep the V shape stable after turning over. Two swing arms and the connecting rod connecting the two swing arms are arranged to uniformly apply force to the connecting rod to change the position of the connecting rod and finally realize the turning over of the turnover plate. Compared with directly applying force to one end of the shaft, the stability can be significantly improved. The specific process of realizing the turning over of the turnover plate is that as the cylinder piston rod extends, the second pulling rope is pulled to turn over the turnover plate to stably abut against the fixed plate at the bottom and form a V shape.

[0022] As preferred, an axial blocking ring for blocking the forward movement of the cross beam is sleeved on the cylinder, an adjusting assembly for adjusting the position of the axial blocking ring along the axial direction of the cylinder is arranged on the moving half mold, the adjusting assembly comprises a second screw rod rotatably arranged at the end of the moving half mold away from the cylinder, an adjusting hand wheel fixed to the end of the second screw rod away from the moving half mold and an adjusting disc threadedly connected to the second screw rod, a guide rod horizontally guided and inserted into the moving half mold is fixed between the adjusting disc and the axial blocking ring.

[0023] By the above scheme, the axial blocking ring can limit the stroke amount of the cylinder inserted into the cross beam. By rotating the adjusting hand wheel, the position of the axial blocking ring along the axial direction of the cylinder can be adjusted and stopped at any time.

[0024] As preferred, the feeding mechanism comprises a conveying belt with a conveying direction perpendicular to the moving direction of the moving half mold, V-shaped positioning blocks fixedly arranged on the outer ring wall of the conveying belt in a circumferential direction and used for carrying one cross beam, and a driving assembly for driving the conveying belt to run, the fixed plate outwardly and obliquely extends upwardly to have a feeding guide plate connected with the discharge end of the conveying belt, the collecting mechanism is consistent with the feeding mechanism in structure, the fixed base outwardly and obliquely extends downwardly at the bottom of the side close to the turnover plate to have a discharge guide plate connected with the feeding end of the collecting mechanism.

[0025] With the above scheme, each V-shaped positioning block can stably transport one cross beam. In the process of conveying several cross beams, the conveying belt has a temporary storage effect on the cross beams other than the delivered cross beam. When the cross beam runs to the discharge end of the feeding mechanism, the cross beam automatically falls to the feeding guide plate due to the presence of the feeding guide plate and rolls along the slope of the feeding guide plate to the V-shaped turnover plate and the fixed plate; the receiving mechanism has the same structure as the feeding mechanism and is also a conveying belt structure with V-shaped positioning blocks. When the cross beam is guided out of the discharge guide plate, it can fall into the V-shaped positioning blocks corresponding to the feeding end of the receiving mechanism and be temporarily stored on the receiving mechanism until it is conveyed to the discharge end of the receiving mechanism.

[0026] The punching device has the following technical effects: the fixed mold is two movable half molds, a material lifting mechanism is arranged in the movable half mold, a feeding mechanism for sequentially delivering cross beams to the material lifting mechanism is arranged on both sides of the fixed mold, a receiving mechanism for sequentially receiving cross beams released by the material lifting mechanism is arranged, and a linkage control mechanism is arranged to realize linkage between the horizontal relative approach or separation of the movable half molds and the vertical lifting of the material lifting mechanism. The device can automatically deliver the temporarily stored cross beams to the mold core one by one and realize positioning and installation of the cross beams on the mold core, and can also realize automatic separation of the cross beams from the mold core and conveying and temporary storage of the separated cross beams. The degree of automation is high, the labor can be significantly reduced, and the continuity and efficiency of the operation can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a front view of the existing automobile tubular front cross beam punching device;

[0028] Figure 2 is a top view of the automobile tubular front cross beam punching device of the embodiment;

[0029] Figure 3 is Figure 2 the sectional view of A-A of

[0030] Figure 4 is Figure 3 the enlarged view of A of

[0031] Figure 5 is the axonometric view of the fixed mold of the embodiment Figure 1 ;

[0032] Figure 6 is the axonometric view of the fixed mold of the embodiment Figure 2 ;

[0033] Figure 7 is Figure 5 the enlarged view of B of

[0034] Figure 8is a front view of the fixed mold of the embodiment;

[0035] Figure 9 is a sectional view of B-B of Figure 8

[0036] Figure 10 is an enlarged view of C of Figure 9

[0037] Figure 11 is a rear view of the fixed mold of the embodiment;

[0038] Figure 12 is a sectional view of C-C of Figure 11

[0039] Figure 13 is a sectional view of D-D of Figure 11

[0040] Figure 14 is an enlarged view of D of Figure 13

[0041] The names of the parts referred to by the respective reference numerals in the above drawings are as follows: 1, movable mold; 2, fixed mold; 3, solid round rod; 4, feeding mechanism; 401, conveying belt; 402, conveying roller; 403, support plate; 404, bracket; 405, V-shaped positioning block; 5, material collecting mechanism; 6, base plate; 7, movable half mold; 701, buffer table; 7011, chip receiving groove; 7012, chip discharge opening; 7013, buffer column; 702, movable base; 7021, buffer guide groove; 7022, buffer spring; 8, cylinder; 801, punched hole; 9, guide block; 11, fixed seat; 1101, support inclined surface; 1102, clearance arc groove; 12, fixed plate; 13, feeding guide plate; 14, turnover plate; 15, material discharge guide plate; 16, connecting rod; 17, first reversing wheel; 18, second reversing wheel; 19, second pull rope; 20, fixed rod; 21, guide column; 22, guide sleeve; 23, shaft; 24, swing arm; 25, air cylinder; 26, guide rail; 27, roller; 28, return spring; 29, first pull rope; 30, axial stop ring; 31, second screw rod; 32, adjusting disc; 33, adjusting hand wheel; 34, guide rod; 35, fixed pulley; 36, movable pulley; 37, guide moving rod; 38, adjusting plate; 39, second driving motor; 40, rotating member; 41, winding ring groove; 42, first screw rod; 43, internally threaded sleeve; 44, third screw rod; 45, mounting seat; 46, accommodating groove; 47, limiting groove; 48, limiting block; 50, pressing spring; 51, limiting plate; 52, driving gear; 53, electromagnet; 54, driven gear. DETAILED DESCRIPTION

[0042] The application will be further described in detail below with reference to the drawings and embodiments. ​​​​​

[0043] A punching device for a tubular front beam of an automobile, as shown in the figure, comprises a punching assembly, which comprises a movable die 1 with a punch and a movable die 2 with a core below the movable die 1. The movable die 1 is not improved in the application, so its structure is not described again. Figures 2-14

[0044] The movable die 2 comprises a base plate 6 and two groups of movable half-molds 7 that are guided to slide on the base plate 6 and can be relatively synchronized to approach or move away. Two guide rails 26 are relatively extended on the base plate 6. The movable half-mold 7 comprises a movable base 702 with a roller 27 and a buffer platform 701 that is vertically and elastically lifted on the movable base 702 and is in L shape. A guide groove is arranged on the movable base 702 and guided with the guide rail 26. The buffer platform 701 has a buffer column 7013 vertically extended at the lower end. A buffer guide groove 7021 is arranged at the upper end of the movable base 702 and vertically guides and lifts the buffer column 7013. Two buffer springs 7022 are arranged in the buffer guide groove 7021 and elastically abut the bottom of the buffer guide groove 7021 and the bottom of the buffer column 7013 respectively. A cylinder 8 with a stamping hole 801 is coaxially protruded on the side of the two buffer platforms 701. The cylinder 8 is inserted on the buffer platform 701 and locked by a screw at the end close to the buffer platform 701. The side of the two cylinders 8 opposite to each other is set as a conical frustum with the pointed end outward. A lead-in block 9 smaller than the cross section of the cylinder 8 is arranged at the center of the side of the cylinder 8 opposite to each other. The two cylinders 8 form the core mentioned above. After the lead-in block 9 is inserted into the end of the beam, it is convenient for the subsequent cylinder 8 to be led into the end of the beam. A material lifting mechanism is vertically lifted on the base plate 6 at the center of the two movable half-molds 7 and is used to position and lift a beam to be coaxial with the core. A feeding mechanism 4 is arranged at the two sides of the base plate 6 and can temporarily store several beams and deliver the beams to the lifting mechanism one by one. A receiving mechanism 5 is arranged to receive one beam released by the lifting mechanism and can temporarily store several beams.

[0045] As shown in the figure, Figures 3-4 As shown in the figure, Figure 9 The lifting mechanism comprises a fixed seat 11, a fixed plate 12 fixed on the fixed seat 11 and a turnover plate 14 hinged on the fixed plate 12 through a shaft 23. The turnover plate 14 can be turned up to be V-shaped with the fixed plate 12 or turned down to be a downward inclined slope with the fixed plate 12. The turning up of the turnover plate 14 and the limiting after turning up are controlled by a driving mechanism, and the turning down of the turnover plate 14 is controlled by its own weight. The fixed seat 11 has a supporting slope 1101 for supporting the turnover plate 14 when the turnover plate 14 is turned down to be a downward inclined slope with the fixed plate 12.

[0046] As shown in the figure, Figure 7 ​As shown, the driving mechanism includes swing arms 24 formed by vertically folding both ends of shaft 23 and connecting rods 16 penetrating through both ends of fixed seat 11, both ends of connecting rods 16 are fixedly connected with both swing arms 24 away from shaft 23, a displacement arc groove 1102 is arranged on fixed seat 11 to allow connecting rods 16 to revolve around shaft 23, a pulling assembly is arranged on fixed seat 11 to drive connecting rods 16 to flip to a certain angle, the pulling assembly includes second pulling ropes 19, a cylinder 25 fixed on the bottom plate and a pulley set for reversing, cylinder 25 is opposite to the middle part of connecting rods 16, the piston rod of cylinder 25 is vertically upwardly arranged and the end of the piston rod is vertically fixed with a fixed rod 20, two sets of second pulling ropes 19 and pulley sets are symmetrically arranged on both sides of cylinder 25, the pulley set includes first reversing wheels 17 and second reversing wheels 18 arranged on fixed seat 11 and below cylinder 25 respectively, one end of second pulling ropes 19 is fixed on connecting rods 16 and the other end is fixedly connected with fixed rod 20 after passing through first reversing wheels 17 and second reversing wheels 18.

[0047] The vertical lifting of the material lifting mechanism and the synchronous relative approaching or moving away of the moving half mold 7 are simultaneously controlled by a linkage control mechanism, which is combined with Figures 9-10 As shown, the linkage control mechanism includes a rotating member 40 vertically arranged on the bottom plate 6, a pulling and winding assembly arranged between rotating member 40 and moving half mold 7 to realize the synchronous relative approaching or moving away of moving half mold 7 with the forward and reverse rotation of rotating member 40, and a lifting assembly arranged between the material lifting mechanism, rotating member 40 and bottom plate 6 to realize the lifting movement of the material lifting mechanism with the forward and reverse rotation of rotating member 40, a suction bidirectional slipping structure is arranged between the lifting assembly and rotating member 40 to stop the lifting of the material lifting mechanism when the end of cylinder 8 is inserted into the end of the beam carried by the material lifting mechanism in the lifting process and to start the descending of the material lifting mechanism when the end of cylinder 8 is separated from the end of the beam carried by the material lifting mechanism, the rotation of rotating member 40 is controlled by a first driving motor, which is combined with Figures 1-14 As shown, the first driving motor is fixed to the lower end of bottom plate 6 (not shown), a driven gear 54 is coaxially fixed on rotating member 40, a driving gear 52 is rotatably arranged on bottom plate 6 and engaged with driven gear 54, the output shaft of first driving motor is in transmission connection with driving gear 52, driving gear 52 is smaller than driven gear 54, which plays a role of labor saving.

[0048] The pulling and winding assembly includes a winding ring groove 41 concavely arranged on the outer ring wall of rotating member 40 and a first pulling rope 29 fixed at one end with moving half mold 7 and at the other end with winding ring groove 41, a limiting plate 51 is vertically fixedly arranged on the upper end face of bottom plate 6 at both ends of the material lifting mechanism, a reset spring 28 is arranged between moving half mold 7 and limiting plate 51 and fixed at both ends.

[0049] Referring to Figure 4And Figure 9 As shown, the lifting assembly comprises a first screw rod 42 vertically arranged and fixed at the lower end of the fixed base 11, the rotating member 40 is vertically provided with a through slot with a circular cross section, the through slot is inserted with a inner threaded sleeve 43 matched with the first screw rod 42, the adsorbing bidirectional slipping structure comprises an electromagnet 53 arranged on the fixed plate 12 and the turnover plate 14 and capable of adsorbing the cross beam after being powered, and a bidirectional slipping structure arranged between the through slot and the inner threaded sleeve 43, and the fixed base 11 is vertically downwardly provided with a guide column 21 at the lower end, and the bottom plate is fixed with a guide sleeve 22 vertically guiding the insertion of the guide column 21.

[0050] The bidirectional slipping structure comprises a containing groove 46 recessed on the inner wall of the through slot, a limiting groove 47 arranged on the outer ring wall of the inner threaded sleeve 43, and a limiting block 48 elastically extended in the containing groove 46 and partially extended out of the containing groove 46 and capable of being embedded in the limiting groove 47, a pressing spring 50 arranged between the limiting block 48 and the bottom of the containing groove 46 and driving the limiting block 48 to partially extend out in the normal state, and a guide slope arranged on the end of the limiting block 48 facing the limiting groove 47 and along the two sides of the rotating direction of the rotating member 40, the guide slope being capable of being guided out of the limiting groove 47 when the limiting block 48 is subjected to a certain torsion, in the normal state, the limiting block 48 is simultaneously inserted and matched with the rotating member 40 and the inner threaded sleeve 43, the rotating member 40 and the inner threaded sleeve 43 temporarily become an integral whole and are matched in thread with the first screw rod 42, and the first screw rod 42 is lifted and lowered along with the guiding and matching of the guide column 21 and the guide sleeve 22; when the first screw rod 42 cannot be lifted and lowered due to pressure, the first screw rod 42 and the inner threaded sleeve 43 remain relatively static, and the torsion between the inner threaded sleeve 43 and the rotating member 40 is continuously increased until the limiting block 48 is guided out of the limiting groove 47 by the guide slope, and the first screw rod 42 and the inner threaded sleeve 43 are synchronously horizontally rotated relative to the rotating member 40.

[0051] The adjusting assembly is arranged on the base plate 6 and can synchronously adjust the initial distance between the moving half mold 7 and the material lifting mechanism after resetting. The adjusting assembly comprises a movable pulley 36 arranged on each first pull rope 29 and a driving assembly for driving the two movable pulleys 36 to move synchronously. The driving assembly comprises two guide moving rods 37 arranged in parallel and moving in a direction perpendicular to the moving direction of the moving half mold 7, an adjusting plate 38 fixed to one end of the two guide moving rods 37, and a third lead screw 44 screwed on the adjusting plate 38. The guide moving rods 37 are guided to slide on the base plate 6. One end of the third lead screw 44 is rotatably connected to the base plate 6, and the other end of the third lead screw 44 is drivingly connected to a second driving motor 39. The second driving motor 39 is fixed on a mounting seat 45, and the mounting seat 45 is fixed on the base plate 6. Each guide moving rod 37 is provided with a movable pulley 36, and the distances from the two movable pulleys 36 to the adjusting plate 38 are consistent. Each first pull rope 29 is further matched with at least one fixed pulley 35 for reversing. In this embodiment, each first pull rope 29 is matched with three fixed pulleys 35. Two of the three fixed pulleys 35 are located on the two sides of the movable pulley 36 and are consistent with the winding direction of the first pull rope 29. One fixed pulley 35 is consistent with the distance from the movable pulley 36 to the adjusting plate 38. These fixed pulleys 35 can reduce the wear of the first pull rope 29 during winding.

[0052] An axial blocking ring 30 for blocking the advance of the cross beam is slidably arranged outside the cylinder 8. An adjusting assembly for adjusting the position of the axial blocking ring 30 along the axial direction of the cylinder 8 is arranged on the moving half mold 7. The adjusting assembly comprises a second lead screw 31 rotatably arranged at the end of the moving half mold 7 away from the cylinder 8, an adjusting hand wheel 33 fixed to the end of the second lead screw 31 away from the moving half mold 7, and an adjusting disc 32 screwed on the second lead screw 31. A guide rod 34 horizontally and guideedly inserted into the moving half mold 7 is fixed between the adjusting disc 32 and the axial blocking ring 30. The axial blocking ring 30 can limit the stroke of the cylinder 8 inserted into the cross beam. By rotating the adjusting hand wheel 33, the position of the axial blocking ring 30 along the axial direction of the cylinder 8 can be adjusted and stopped at any position.

[0053] The feeding mechanism 4 comprises a support 404, conveying rollers 402 rotatably arranged at both ends of the support 404, and a conveying belt 401 tightly wound around the two conveying rollers 402. A supporting plate 403 for supporting the conveying belt 401 is arranged on the support 404. A third driving motor is fixedly arranged on one side of the support 404 and used to drive one of the conveying rollers 402 to rotate. The conveying direction of the conveying belt 401 is perpendicular to the moving direction of the moving half mold 7. A plurality of V-shaped positioning blocks 405 capable of independently supporting one cross beam are fixedly arranged on the outer circumferential wall of the conveying belt 401 in a circumferential direction. The fixed plate 12 outwardly and obliquely extends upwardly to have a feeding guide plate 13 connected to the discharging end of the conveying belt 401.

[0054] The material receiving mechanism 5 is consistent with the structure of the material feeding mechanism, and a material discharging guide plate 15 which is connected with the feeding end of the material receiving mechanism 5 is outwardly and downwardly extended at the bottom of the fixed seat 11 near the one side of the turnover plate 14.

[0055] The chip removal structure is arranged on the buffer table 701, and the chip removal structure comprises a chip receiving groove 7011 arranged below the stamping hole 801 on the horizontal section of the buffer table 701 and a chip removal opening 7012 which is communicated with the chip receiving groove 7011 and is arranged in the side wall of the horizontal section of the buffer table 701, and the bottom of the chip receiving groove 7011 is inclined downwardly to the chip removal opening 7012, so that the chips can enter the chip receiving groove 7011 and be discharged from the chip removal opening 7012 after stamping.

[0056] The pressure sensor is arranged on the fixed plate 12 and the axial stop ring 30 respectively, the pressure sensor, the first driving motor, the second driving motor 39, the third driving motor, the electromagnet 53 and the cylinder 25 are connected with the controller, and the switching of the above-mentioned components is realized by the logic programming of the controller.

[0057] The specific operation process is as follows:

[0058] 1. Initial state: the cylinder 25 is in the extended state (the turnover plate 14 is in the state of being turned over to the bottom), the reset spring 28 is in the relaxed state (the maximum spacing state between the moving half die 7 and the material lifting mechanism), the material lifting mechanism is in the state of descending to the maximum stroke, and the electromagnet 53 is in the power-off state.

[0059] 2. The material feeding mechanism 4 stops after running a distance of one V-shaped positioning block 405, and one cross beam falls from the material feeding mechanism 4 and enters between the V-shaped turnover plate 14 and the fixed plate 12 along the feeding guide plate 13.

[0060] 3. When the pressure sensor on the fixed plate 12 senses the pressure, the electromagnet 53 is powered after 2S, and the cross beam is adsorbed on the turnover plate 14 and the fixed plate 12.

[0061] 4. The first driving motor is positively rotated, the winding ring groove 41 winds the first pull rope 29, the cylinder 8 relatively approaches, and the turnover plate 14 and the fixed plate 12 carry the cross beam vertically upward, when the end of the cylinder 8 is inserted into the end of the cross beam on the material lifting mechanism, the material lifting mechanism keeps relatively static in the vertical direction, and the cylinder 8 continues to be inserted into the cross beam until the axial stop ring 30 touches the end of the cross beam.

[0062] 5. The movable die 1 is lowered, and the stamping is completed.

[0063] 6. The movable die 1 is raised.

[0064] 7、first drive motor reverse, winding ring groove 41 release first pull rope 29, cylinder 8 in the reset spring 28 under the action of relative away, before the cylinder 8 from the beam, due to the effect of electromagnet 53, lifting material mechanism can't drop; When the cylinder 8 from the beam, lifting material mechanism carrying beam down to the maximum stroke;

[0065] 8、electromagnet 53 lose power;

[0066] 9、cylinder 25 piston rod retraction, flip plate 14 under the action of gravity down, beam along the flip plate 14 roll to the material guide plate 15, and into the material collecting mechanism 5 feed end of a V-shaped positioning block 405 on;

[0067] 10、material collecting mechanism 5 forward a V-shaped positioning block 405 distance, the beam moves to the conveyor 401 above (to avoid the beam slide) ;

[0068] 11、cylinder 25 piston rod extension, flip plate up flip reset;

[0069] 12、repeat steps 1~11.

[0070] The above only is the preferred embodiment of the present application, the protection scope of the present application is not only limited to the above examples, all technical solutions under the idea of the present application belong to the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A punching device for a tubular front beam of a motor vehicle, comprising a punch member comprising a movable die (1) with a punch and a fixed die (2) with a core, positioned below the movable die (1), characterised in that, The fixed mold (2) comprises a bottom plate (6) and two groups of movable half molds (7) slidingly guided on the bottom plate (6) and capable of being relatively and synchronously close or far away, and coaxially protruding on the opposite sides of the two groups of movable half molds (7) are respectively a cylinder (8) with a punching hole (801), and the two cylinders (8) are coaxially arranged and form the mold core, and a material lifting mechanism for positioning and lifting a cross beam to be coaxial with the mold core is vertically arranged on the bottom plate (6) at the center of the two movable half molds (7), the material lifting mechanism comprises a fixed seat (11), a fixed plate (12) fixed on the fixed seat (11) and a turnover plate (14) hinged on the fixed plate (12) through a shaft (23), the turnover plate (14) can be turned up to be V-shaped with the fixed plate (12) or turned down to be a downward inclined slope with the fixed plate (12), and the two sides of the punching part are provided with a feeding mechanism (4) capable of temporarily storing a plurality of cross beams and sequentially delivering the cross beams to the material lifting mechanism and a collecting mechanism (5) capable of temporarily storing a plurality of cross beams and sequentially receiving one cross beam released by the material lifting mechanism.

2. The punching device for the tubular front beam of an automobile according to claim 1, characterized in that: The vertical lifting of the material lifting mechanism and the synchronous relative close or far away of the movable half molds (7) are simultaneously controlled by a linkage control mechanism, the linkage control mechanism comprises a rotating member (40) vertically arranged on the bottom plate (6), a pulling and winding assembly arranged between the rotating member (40) and the movable half molds (7) and capable of realizing the synchronous relative close or far away of the movable half molds (7) with the forward and reverse rotation of the rotating member (40), and a lifting assembly arranged between the material lifting mechanism, the rotating member (40) and the bottom plate (6) and capable of realizing the lifting movement of the material lifting mechanism with the forward and reverse rotation of the rotating member (40), and an adsorbing bidirectional slipping structure is arranged between the lifting assembly and the rotating member (40) and capable of stopping the lifting of the material lifting mechanism when the end of the cylinder (8) is inserted into the end of the cross beam carried by the lifting mechanism and capable of lowering the lifting mechanism when the end of the cylinder (8) is separated from the end of the cross beam carried by the lifting mechanism, and the rotation of the rotating member (40) is controlled by a first driving motor.

3. The punching device for the tubular front beam of an automobile according to claim 2, characterized in that: The pulling and winding assembly comprises a winding ring groove (41) concentrically recessed on the outer ring wall of the rotating member (40) and a first pulling rope (29) fixed at one end with the movable half mold (7) and at the other end with the winding ring groove (41), and a limiting plate (51) is vertically fixed on the end face of the bottom plate (6) at both ends of the material lifting mechanism, and a reset spring (28) is arranged between the movable half mold (7) and the limiting plate (51) and fixed at both ends.

4. The punching device for the tubular front beam of an automobile according to claim 3, characterized in that: The lifting assembly comprises a first lead screw (42) vertically arranged and fixed at the lower end of the fixed seat (11), a through groove with a circular cross section is vertically arranged on the rotating member (40), an internally threaded sleeve (43) matched with the first lead screw (42) is inserted into the through groove, the adsorbing bidirectional slipping structure comprises an electromagnet (53) arranged on the fixed plate (12) and / or the turnover plate (14) and capable of adsorbing the cross beam after being electrified and a bidirectional slipping structure arranged between the through groove and the internally threaded sleeve (43), and a guide column (21) is vertically and downward protruded at the lower end of the fixed seat (11), and a guide sleeve (22) is fixed on the bottom plate (6) and vertically and guidingly inserted with the guide column (21).

5. The punching device for the tubular front beam of an automobile according to claim 4, characterized in that: The bidirectional slipping structure comprises a containing groove (46) recessed on the inner wall of the through groove, a limiting groove (47) arranged on the outer ring wall of the internal thread sleeve (43), and a limiting block (48) elastically extended into the containing groove (46) and partially extended out of the containing groove (46) and embedded into the limiting groove (47), and the end of the limiting block (48) facing the limiting groove (47) is provided with a guide slope on both sides along the rotating direction of the rotating member (40).

6. The punching device for the tubular front beam of an automobile according to claim 4, characterized in that: The adjusting assembly is arranged on the bottom plate (6) and can synchronously adjust the initial distance between the moving half mold (7) and the material lifting mechanism after reset, the adjusting assembly comprises a movable pulley (36) arranged on each first pull rope (29), and a driving assembly for driving the two movable pulleys (36) to move synchronously, the driving assembly comprises two guide moving rods (37) arranged in parallel and moving in a direction perpendicular to the moving direction of the moving half mold (7), an adjusting plate (38) fixed at one end of the two guide moving rods (37), and a third lead screw (44) screwed on the adjusting plate (38), one end of the third lead screw (44) is rotatably connected with the bottom plate (6), and the other end of the third lead screw (44) is drivingly connected with the second driving motor (39), and each guide moving rod (37) is provided with a movable pulley (36), and the distance from the two movable pulleys (36) to the adjusting plate (38) is consistent.

7. The punching device for the tubular front beam of an automobile according to claim 1, characterized in that: The upward turning of the turnover plate (14) is controlled by a driving mechanism, and the downward turning of the turnover plate (14) is controlled by its own weight, and the fixed seat (11) has a supporting slope (1101) for supporting the turnover plate (14) when the turnover plate (14) is turned downward to form an inclined surface with the fixed plate (12).

8. The punching device for the tubular front beam of an automobile according to claim 7, characterized in that: The driving mechanism comprises swing arms (24) formed by vertically folding two ends of the shaft (23) and a connecting rod (16) penetrating through both ends of the fixed seat (11), both ends of the connecting rod (16) are fixedly connected with the swing arms (24) away from the shaft (23), a clearance arc groove (1102) is arranged on the fixed seat (11) to allow the connecting rod (16) to revolve around the shaft (23), a pulling assembly is arranged on the fixed seat (11) to drive the connecting rod (16) to turn to a certain angle to drive the turnover plate (14) to turn upward, the pulling assembly comprises a second pull rope (19), a cylinder (25) fixed on the bottom plate, and a pulley set for reversing, the piston rod of the cylinder (25) is vertically upwardly arranged, the pulley set comprises a first reversing pulley (17) and a second reversing pulley (18) arranged below the cylinder (25) and away from the cylinder (25) on the fixed seat (11), one end of the second pull rope (19) is fixed on the connecting rod (16), and the other end of the second pull rope (19) is fixedly connected with the end of the piston rod of the cylinder (25) after passing through the first reversing pulley (17) and the second reversing pulley (18).

9. The punching device for the tubular front beam of an automobile according to claim 1, characterized in that: An axial stop ring (30) is arranged outside the cylinder (8) to block the advancement of the cross beam, and an adjusting assembly is arranged on the moving half mold (7) to adjust the position of the axial stop ring (30) along the axial direction of the cylinder (8), the adjusting assembly comprises a second lead screw (31) rotatably arranged at one end of the moving half mold (7) away from the cylinder (8), an adjusting hand wheel (33) fixed to one end of the second lead screw (31) away from the moving half mold (7), and an adjusting disc (32) threadedly connected to the second lead screw (31), and a guide rod (34) horizontally guided and inserted into the moving half mold (7) is fixed between the adjusting disc (32) and the axial stop ring (30).

10. The punching device for the tubular front beam of an automobile according to claim 1, characterized in that: The feeding mechanism (4) comprises a conveying belt (401) whose conveying direction is perpendicular to the moving direction of the moving half mold (7), V-shaped positioning blocks (405) fixedly arranged on the outer ring wall of the conveying belt (401) in a circumferential direction and used for carrying a cross beam, and a driving assembly for driving the conveying belt (401) to run, and the fixed plate (12) outwardly and obliquely extends upwardly to have a feeding guide plate (13) connected to the discharge end of the conveying belt (401), and the collecting mechanism (5) is consistent with the feeding mechanism, and the fixed seat (11) outwardly and obliquely extends downwardly at the bottom of one side of the fixed seat (11) close to the turnover plate (14) to have a discharging guide plate (15) connected to the feeding end of the collecting mechanism (5).

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