CN210818222U - Automatic welding equipment for L-shaped frame - Google Patents

Abstract

The utility model discloses a L frame automatic weld equipment, including welding process device, automatic feeding device and automatic unloader. The welding processing device comprises a rotary table, a first welding machine and a second welding machine, wherein a plurality of jigs are arranged on the rotary table, and the jigs are sequentially positioned at a first feeding station, a second feeding station, a first welding station, a second welding station and a discharging station along with the rotation of the rotary table. The jig is provided with a central positioning block and a propping clamping jaw which are used for positioning the L-shaped frame. The automatic feeding device comprises two feeding mechanisms and two material taking mechanisms, and the automatic discharging device comprises a material receiving mechanism and a third material taking mechanism. The automatic welding equipment for the L frame can realize full-automatic operation of feeding, welding and discharging of the L frame, greatly improves efficiency, and is suitable for being used in modern workshops in mass production. Meanwhile, the equipment is also provided with a jig with a reasonable structure to position the two L-shaped frames, so that the relative positions of the two L-shaped frames are ensured to be stable in the whole welding process, and the good welding quality can be ensured.

Description

Automatic welding equipment for L-shaped frame

Technical Field

The utility model relates to an automation equipment especially relates to one kind and carries out welded automatic weld equipment to two L frame butt joints.

Background

The two L-frames shown in the upper drawing of fig. 1 are components in the vibration motor of the mobile phone, and during the assembly process of the vibration motor, the two L-frames are butted into a closed ring shape shown in the lower drawing, and are welded at two butting positions w1 and w2 to fix the two into a whole.

At present, no processing equipment which can specially carry out automatic feeding, welding and discharging on the L frame exists, a worker needs to hold a welding gun by hand and assist other positioning fixtures to carry out welding work, and the phenomenon of uneven welding quality exists. Moreover, the manual welding mode is an important problem to be solved urgently in the production background that mass processing is needed.

Therefore, it is necessary to provide an automatic L-frame welding apparatus capable of automatically feeding, welding, and blanking.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a L frame automatic weld equipment that can automatic feeding, welding and unloading.

In order to achieve the purpose, the utility model provides an automatic welding device for an L frame, which comprises a welding processing device, an automatic feeding device and an automatic discharging device, wherein the automatic feeding device and the automatic discharging device are arranged adjacent to the welding processing device; the welding processing device comprises a rotary table, a first welding machine and a second welding machine, wherein a plurality of jigs are arranged on the rotary table along the circumferential direction, the jigs can rotate along with the rotary table and are sequentially positioned at a first feeding station, a second feeding station, a first welding station, a second welding station and a discharging station, the first welding machine and the second welding machine respectively correspond to the first welding station and the second welding station, each jig comprises a bottom plate, a central positioning block and two abutting clamping claws, the central positioning block is fixed on the bottom plate and can be used for two L frames to surround and attach to the outer side of the central positioning block, the two abutting clamping claws are arranged on the bottom plate in a sliding mode and are positioned on two sides of the central positioning block, the length and the width of the central positioning block respectively correspond to the sizes of the long side and the short side of the L frame, and the abutting clamping; the automatic feeding device comprises a first feeding mechanism, a second feeding mechanism, a first material taking mechanism and a second material taking mechanism, wherein the first feeding mechanism is used for conveying a material tray for loading the L frame; the automatic blanking device comprises a material receiving mechanism for conveying the material tray and a third material taking mechanism which moves between the material receiving mechanism and the blanking station.

The L frames in the first feeding mechanism are taken and placed into the jig of the first feeding station by the first material taking mechanism, the jig rotates to the second feeding station along with the rotary disc, and then the other L frame is taken and placed into the jig by the second material taking mechanism. After the two L-shaped frames are placed, the two abutting clamping jaws on the jig abut the two L-shaped frames against the central positioning block to realize positioning. When the jig rotates to the first welding station, the first welding machine welds one butt joint position of the two L frames, and when the jig continues to rotate to the second welding station, the second welding machine welds the other butt joint position of the two L frames. The welded L frames come to a blanking station along with the jig, and the two integrated L frames are taken out by the third material taking mechanism and are fed into a material tray on the material receiving mechanism. Therefore, the automatic L-frame welding equipment can realize full-automatic L-frame feeding, welding and discharging operation, greatly improves the efficiency, and is suitable for being used in modern workshops in mass production. Meanwhile, the equipment is also provided with a jig with a reasonable structure to position the two L-shaped frames, so that the relative positions of the two L-shaped frames are ensured to be stable in the whole welding process, and the good welding quality can be ensured.

Preferably, the center positioning piece is I-shaped and includes two short edge end portions corresponding to the short edges of the L-shaped frame and connecting portions connected between the two short edge end portions, and the abutting clamping jaw is used for abutting against the long edge of the L-shaped frame and includes two abutting claws facing the two short edge end portions.

Preferably, the propping clamping jaw is fixed on a sliding block which is arranged on the bottom plate in a sliding manner, a fixing part is arranged on the outer side of the bottom plate, and an elastic part which pushes the sliding block to the central positioning block is arranged between the fixing part and the sliding block.

Specifically, a positioning table which is suspended relative to the bottom plate is fixed on the bottom plate through two protruding columns, a central positioning block is fixed on the positioning table, one end, close to the inner, of the sliding block is located below the positioning table when the L frame is tightly abutted to the central positioning block by the abutting clamping jaw, the jig further comprises a driving rod which is located below the bottom plate and can ascend and descend relative to the bottom plate, the lower end of the driving rod downwards penetrates through the rotary table, the automatic welding equipment for the L frame further comprises a driving piece located below the rotary table, the driving rod is ordered by the driving piece to ascend when the rotary table rotates to the driving piece to be in contact with the driving piece, and the sliding block is pushed to slide outwards when.

Preferably, the automatic feeding device further comprises a first pre-positioning mechanism located between the first feeding mechanism and the first feeding station and a second pre-positioning mechanism located between the second feeding mechanism and the second feeding station, the first taking mechanism is actuated among the first feeding mechanism, the first pre-positioning mechanism and the first feeding station, and the second taking mechanism is actuated among the second feeding mechanism, the second pre-positioning mechanism and the second feeding station; the first pre-positioning mechanism comprises a positioning platform, a fixed positioning part which is convexly fixed on the positioning platform and is matched with the L frame in shape, a movable positioning part which is arranged on the positioning platform in a sliding mode and a driving device which drives the movable positioning part to slide so as to enable the L frame to be abutted against the fixed positioning part.

Specifically, first feeding agencies is including getting the first material manipulator of putting first prepositioning mechanism and getting the L frame from first prepositioning mechanism and putting the first material loading manipulator of the tool of first material loading station, and first material manipulator has the material clamping jaw, and first material loading manipulator has the material clamping jaw.

Preferably, the first feeding mechanism includes a guide rail for bearing the material trays, one end of the guide rail is a material taking position, the other end of the guide rail is provided with a loading mechanism capable of accommodating a plurality of stacked material trays, the first feeding mechanism further includes a material pushing mechanism for pushing the lowest material tray in the loading mechanism to the material taking position along the guide rail, the loading mechanism includes two locating parts arranged oppositely, a bracket positioned below the two locating parts and capable of supporting the material tray, two supporting pieces arranged on two sides of the bracket and capable of moving inwards to be inserted between the two material trays, a first lifting driving device for driving the bracket to lift and a second lifting driving device for driving the first lifting driving device to lift.

Preferably, the receiving mechanism comprises a guide rail for bearing the material tray, the guide rail is provided with an empty tray loading mechanism, a full tray transfer mechanism and a material loading position between the empty tray loading mechanism and the full tray transfer mechanism, the empty tray loading mechanism and the full tray transfer mechanism are positioned at two ends, the automatic discharging device further comprises a transition positioning table between the material loading position and the discharging position, and the third material taking mechanism comprises a first discharging manipulator and a second discharging manipulator, the first discharging manipulator is actuated between the discharging position and the transition positioning table, and the second discharging manipulator is actuated between the transition positioning table and the material loading position.

Preferably, the turntable is further provided with a transposition station located at the downstream of the second welding station and at least one processing station located between the transposition station and the blanking station, the jig further comprises a processing table located on one side of the base plate, the processing table is provided with a groove and four positioning columns located on two sides of the groove, the automatic welding equipment for the L-shaped frames further comprises a transposition manipulator opposite to the transposition station, and the transposition manipulator takes the two welded and fixed L-shaped frames off the central positioning block and sleeves the four positioning columns.

Specifically, the transposition manipulator comprises a grabbing component for grabbing the L-shaped frame, the grabbing component comprises a mounting seat, a top pressure part, an elastic part and two hooking claws, the top pressure part is connected to the lower portion of the mounting seat in a vertical sliding mode, the elastic part elastically abuts against the portion between the mounting seat and the top pressure part, the two hooking claws are located on two sides of the top pressure part, the two hooking claws are mounted on the mounting seat and can be folded or unfolded relatively, hooking portions bent in opposite directions are arranged at the bottoms of the two hooking claws, and the two hooking portions and the top pressure part are matched to grab the L-shaped.

Drawings

Fig. 1 is a schematic diagram of two L-frames before and after docking.

Fig. 2 is a schematic plan view of the automatic welding apparatus for L-frame of the present invention.

Fig. 3 is a plan view of the welding apparatus.

Figure 4 is a perspective view of a gripper assembly of the indexing robot.

Figure 5 is a perspective view of the gripper assembly when inverted.

Fig. 6 is a perspective view of the jig 9.

Fig. 7 is a perspective view of the base plate and components disposed thereon.

Fig. 8 is an enlarged view of the bottom plate at the center locating block.

Fig. 9 is a perspective view of a center positioning block.

Fig. 10 is a perspective view showing the top structure of the driving lever after hiding the bottom plate.

Fig. 11 is a sectional view of the jig.

Fig. 12 is a perspective view of the automatic feeding device.

Fig. 13 is another perspective view of the automatic feeding device after the first material taking mechanism and the second material taking mechanism are hidden.

Fig. 14 is a perspective view of the bracket assembly.

Fig. 15 is a front view of the bracket assembly.

Fig. 16 is a perspective view of four pre-positioning mechanisms.

Fig. 17 is an enlarged view at D in fig. 16.

Figure 18 is a perspective view of a take-out assembly of the first take-out robot.

Fig. 19 is a perspective view of the automatic blanking apparatus.

Fig. 20 is a perspective view of the automatic blanking device with the third material taking mechanism hidden.

Fig. 21 is a side view of a third take off mechanism.

Fig. 22 is a perspective view of the blanking assembly of the first blanking robot.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 2, the utility model provides a L frame automatic weld equipment can be as an organic whole with two shown L frame weldings in fig. 1 to material loading before can welding and the unloading after the welding automatically. The L-frame automatic welding equipment comprises three large devices, namely a welding processing device A, an automatic feeding device B and an automatic discharging device C, wherein each large device comprises a plurality of mechanisms for executing corresponding functions. The automatic feeding device B and the automatic blanking device C are arranged adjacent to the welding processing device A, the automatic feeding device B is used for feeding the L frames into the welding processing device A, the welding processing device A performs welding and other related processing for the two butted L frames, and the processed L frames are blanked into the automatic blanking device C. In fig. 2, three devices are roughly divided by a dashed line frame to facilitate understanding of the positional relationship between the three devices, but the line in the figure does not represent that there is an accurate boundary between the devices. The specific structures of the three devices will be described below.

Referring to fig. 3, the welding processing device a includes a turntable 1, a first welding machine 21 and a second welding machine 22, a plurality of jigs 9 are arranged on the turntable 1 along the circumferential direction, the jigs 9 can be successively located at a first feeding station 11, a second feeding station 12, a first welding station, a second welding station and a discharging station 13 along with the rotation of the turntable 1, and the positions of the first welding machine 21 and the second welding machine 22 respectively correspond to the first welding station and the second welding station. It is known that the present apparatus welds two butt joint positions of two L-frames, so that the jig 9 loads a first L-frame when it reaches the first loading station 11, and loads a second L-frame when it reaches the second loading station 12, and positions and keeps the two L-frames in butt joint in the jig 9. Then the jig 9 arrives at the first welding station and the first welding machine 21 is used for welding the first butt joint position, and arrives at the second welding station and the second welding machine 22 is used for welding the second butt joint position. The first welder 21 and the second welder 22 are both laser welders. The jig 9 finally rotates to a blanking station 13 along with the turntable 1 and is blanked by an automatic blanking device C.

The five stations are basic stations of the welding processing device a, and on the basis, the turntable 1 preferably further has at least one processing station to perform other processing on the welded L-shaped frame. Specifically, the plurality of processing stations on the rotary table 1 in this embodiment include a laser etching station, a code scanning station, and a detection station 14, and these three stations are located downstream of the second welding station in sequence and upstream of the blanking station 13. Correspondingly, the welding processing device A further comprises a laser engraving machine 23, a code scanning machine 24 and a detection mechanism 25, wherein the position of the laser engraving machine 23 corresponds to a laser engraving station and is used for laser engraving of patterns and characters with product information such as bar codes and two-dimensional codes on the L frame, the position of the code scanning machine 24 corresponds to the code scanning station and is used for scanning and identifying the information engraved on the L frame by the laser, judging whether laser engraving is wrong or not and recording correct information into a system, the detection mechanism 25 comprises related components such as a CCD (charge coupled device) and a distance sensor and is used for measuring the length, the width and the height of the two L frames which are welded into a whole, and detecting the parallelism and the flatness to judge whether the welding quality is qualified or not. Because the jig 9 has a structure for positioning the L-shaped frame (see the following description of the structural part of the jig 9), which may affect the laser etching, code scanning, etc., a transposition station 15 is further disposed on the turntable 1, the transposition station 15 is located between the second welding station and the laser etching station, the welding processing apparatus a has a transposition robot 26 located opposite to the transposition station 15, and the transposition robot 26 is located between the second welding machine 22 and the laser etching machine 23. When the jig 9 reaches the transposition station 15, the transposition manipulator 26 transfers the two L-shaped frames from the original positioning positions to another position where the side surfaces of the L-shaped frames can be exposed, so that subsequent processing is facilitated.

Further, the turntable 1 is further provided with a cleaning station, the cleaning station is located between the blanking station 13 and the first feeding station 11, and the welding processing device a further comprises a cleaning mechanism 27. Since the jig 9 has the fine chips left thereon during the welding, the jig 9 is cleaned by the cleaning mechanism 27 to keep the jig 9 clean during the cleaning of the station. The cleaning mechanism 27 may specifically include an air duct facing the jig 9, which performs cleaning by blowing out high-pressure air. Of course, a brush may also be used for cleaning.

Referring to fig. 4 and 5, the index robot 26 includes a material grabbing component 261 for grabbing the L-shaped frame and a robot arm for driving the material grabbing component 261 to move between different positions on the jig 9, and the structure of the robot arm is omitted. The material grabbing component 261 comprises an installation base 262, two pressing members 263 connected to the lower portion of the installation base 262 in a vertically sliding manner, and two hooks 264 arranged on the installation base 262 and located on two sides of the two pressing members 263 and capable of being folded or unfolded relatively. An elastic member 265 is disposed between the pressing member 263 and the mounting base 262, and the elastic member 265 provides an elastic force for pushing down the pressing member 263 and provides a buffer when the pressing member 263 is contacted. The bottom of the two hooks 264 has a hook portion 267 bent toward each other, and the hook portion 267 is located below the pressing member 263. The side of the mounting base 262 is further provided with a limit hook 268, and the lower end of the limit hook 268 is bent inwards and can hook the top pressing piece 263 so as to limit the maximum downward movement stroke of the top pressing piece 263. The two hooks 264 may be implemented using a jaw cylinder. The two pressing parts 263 and the two hooking parts 267 are matched to grab the L-shaped frame from the jig 9, when the L-shaped frame is grabbed, the two hooks 264 are firstly opened, the grabbing component descends to press the two pressing parts 263 onto the two L-shaped frames, then the two hooks 264 are folded to enable the hooking parts 267 to be inserted under the two L-shaped frames, finally the grabbing component ascends to enable the L-shaped frame to be clamped between the hooking parts 267 and the pressing parts 263, in addition, the grabbing is carried out in the vertical direction of the L-shaped frame, and pressure is not applied to the side face of the L-shaped frame. For two L frames just welded on the jig 9, if pressure is applied from the side surface to clamp the two L frames, the welding position may be damaged, and the reasonable and reliable material grabbing component in the scheme can avoid the damage.

With reference to fig. 6 to 11, the jig 9 includes a bottom plate 90, a center positioning block 91, and a holding jaw 92. The center positioning block 91 is fixed in the middle of the bottom plate 90, and the length and width thereof correspond to the long side and short side of the L-frame, respectively, so that the two L-frames can be attached around the outside of the center positioning block 91. The two holding-against claws 92 are slidably disposed on the bottom plate 90 and located at two sides of the central positioning block 91, and the holding-against claws 92 can slidably approach the central positioning block 91 to hold the corresponding L-shaped frame against the central positioning block 91 or slidably move away from the central positioning block 91.

The center positioning block 91 comprises two short-edge end parts 911 at two ends and a connecting part 912 connected between the two short-edge end parts 911, the two short-edge end parts 911 and the connecting part 912 form an I-shaped structure, and the two short-edge end parts 911 correspond to short edges of two L-shaped frames respectively. The center positioning block 91 further includes intermediate support portions 913 protruding from both sides of the connection portion 912 to be flush with the short-side ends 911, and the intermediate support portions 913 can support the long sides of the L-frame. The center positioning block 91 of this structure has a space between the middle support part 913 and the short-side end part 911, which can accommodate insertion of the robot, thereby facilitating the robot to place the L-frame to the side of the center positioning block 91 or take the L-frame away from the side of the center positioning block 91. Correspondingly, the abutting clamping jaw 92 comprises two spaced-apart top claws 921 facing the two short-side end parts 911, and in the embodiment, the abutting clamping jaw 92 is used for abutting against the long side of the L frame, so that the two top claws 921 can respectively abut against the two ends of the long side of the L frame against the side surfaces of the two short-side end parts 911, and the two top claws 921 are spaced-apart, so that interference on grabbing the L frame by the equipment manipulator can be avoided while the abutting against the L frame is maintained. Therefore, the abutting clamping jaw 92 and the central positioning block 91 are matched in structure, so that the L-shaped frame can be positioned, the L-shaped frame can be conveniently taken and placed, and the practicability is very high.

The long side of the L-frame is abutted to the central positioning block 91 to make the L-frame positioned well, but in order to further enhance the positioning effect, the jig 9 in this embodiment further includes two abutting members 93 slidably disposed on the bottom plate 90, the two abutting jaws 92 are disposed on two sides of the long side of the central positioning block 91, and the two abutting members 93 are disposed on two sides of the short side of the central positioning block 91. The propping member 93 can slide close to the center positioning block 91 and prop the short side of the L-frame against the end face of the short side end 911, or slide away from the center positioning block 91.

The two abutting pieces 93 and the two abutting clamping jaws 92 can be interlocked with each other or independent from each other relative to the central positioning block 91, and devices such as cylinders can be arranged to drive the abutting pieces 93 and the abutting clamping jaws 92 to slide, or the elastic force of the springs can be used to push the abutting pieces 93 and the abutting clamping jaws 92. Considering that the jig 9 needs to cooperate with other mechanisms in the automated welding and assembling equipment, and the L-frame may be damaged due to the excessive clamping force driven by the power device, an elastic clamping manner is adopted in the embodiment. Specifically, four sliders 941 that slide in the radial direction are disposed on the base plate 90, the four sliders 941 are disposed at regular intervals, two abutting members 93 and two abutting claws 92 are respectively fixed to the four sliders 941, four fixing members 942 are disposed at positions on the base plate 90 near the outer edge, and two elastic members 943 (compression springs) that push the sliders 941 to the center positioning block 91 are disposed between each slider 941 and the corresponding fixing member 942. In this solution, the clamping force of the propping element 93 and the propping clamping jaw 92 to the L-shaped frame is from the elastic force provided by the elastic element 943, and there is a buffer room, which will not cause hard damage.

A positioning table 952 suspended in the air relative to the bottom plate 90 is fixed on the bottom plate 90 through two convex columns 951, the positioning table 952 is in a strip-shaped structure, two sides of the strip-shaped positioning table 952 are respectively provided with a propping piece 93 and a propping clamping jaw 92, a central positioning block 91 is fixed on the positioning table 952, and the central positioning block 91 is obliquely arranged relative to the positioning table 952 rather than arranged along the length direction of the positioning table 952, so that the propping pieces 93 and the propping clamping jaws 92 positioned on two sides of the positioning table 952 can well prop against the L-frame. In addition, two stopper columns 953 located on both sides of the center positioning block 91 are protrudingly provided on the positioning stage 952, and the positions of the stopper columns 953 substantially correspond to the intermediate support portion 913 with a space sufficient for accommodating the L-frame therebetween. When the L frame is placed to the manipulator, the L frame is placed between the central positioning block 91 and the limiting column 953, and the limiting column 953 plays a primary limiting role and can prevent the L frame from overturning. The positions of the positioning platform 952 on both sides of the limiting column 953 are recessed downward, so that the portion of the L-frame placed thereon is suspended, and therefore the hooked portion 267 of the hook 264 of the grabbing component 261 can be inserted under the L-frame.

When the L-frame is tightly pressed against the central positioning block 91 by the pressing member 93 and the pressing claw 92, one end of the inner side of the slider 941 for fixing the pressing member 93 and the pressing claw 92 is located below the positioning table 952.

The jig 9 further includes a driving rod 96 disposed below the bottom plate 90 and capable of moving up and down relative to the bottom plate 90, the upper end of the driving rod 96 has a rod head 961, the top of the rod head 961 is provided with four driving inclined planes 962, and in the process that the driving rod 96 is lifted out of the bottom plate 90, the four driving inclined planes 962 are respectively contacted with the four sliders 941 so as to push the sliders 941 to slide outward and away from the central positioning block 91. Preferably, a contact roller 945 having a rotation axis arranged horizontally is provided at an inner end of the slider 941, and the driving inclined surface 962 pushes the slider 941 to slide by contact with the contact roller 945.

Tool 9 still includes fixing base 97 and the revolving cylinder 98 of fixing on fixing base 97, and bottom plate 90 sets up on revolving cylinder 98 and consequently can rotate under the driving of revolving cylinder 98, and two L frames that are located central locating piece 91 by the centre gripping promptly can rotate, and revolving cylinder 98 makes bottom plate 90 rotate when tool 9 rotates to the second welding station from first welding station, ensures that another butt joint position can just face with the second welding machine. Through making tool 9 have the rotation function, can make things convenient for welding equipment to weld two butt joint positions of two L frames to the restriction requirement that the welding machine set up the position in equipment has been reduced.

The driving rod 96 is slidably mounted on the fixing base 97 and passes through the rotating cylinder 98 and the bottom plate 90 upward, and a restoring elastic member 965 is further disposed between the driving rod 96 and the fixing base 97, and the restoring elastic member 965 provides downward elastic force to the driving rod 96, so that the driving rod 96 is maintained at a sinking position without protruding upward on the bottom plate 90 when not pushed by an external force, that is, the driving rod 96 does not push the slider 941.

The jig 9 further includes a processing table 99 disposed on the fixing base 97 and located on one side of the bottom plate 90 and capable of moving up and down relative to the bottom plate 90, the processing table 99 has a groove 991 and four positioning pillars 992 located on two sides of the groove 991, and the two L-shaped frames after being welded and fixed can be sleeved on the four positioning pillars 992. Because the existence of the abutting clamping jaw 92 and the abutting piece 93 on the bottom plate 90, the processes of laser engraving, code scanning or detection and the like are difficult to be carried out on the welded L-shaped frame from the side surface, so that the processing table 99 is arranged on one side of the bottom plate 90, and after the welding work is finished, the two L-shaped frames can be moved and positioned on the four positioning columns 992, and the processes of detection and the like are convenient to carry out.

Referring back to fig. 3, under the turntable 1, specifically, at the positions corresponding to the first loading station 11, the second loading station 12 and the transposition station 15, there are protruding driving members (angle reason not shown), and when the jig 9 reaches the first loading station 11 and the second loading station, the driving members will drive the driving rods 96 to rise, so that the abutting members 93 and the abutting jaws 92 are released, and thus the jig 9 can be loaded. After the jig 9 leaves the second feeding station 12, no driving member pushes the driving rod 96, and the jig 9 is kept in a state of clamping and fixing the L frame. Similarly, when the jig 9 reaches the indexing station 15, the abutting member 93 and the abutting jaw 92 are also released, so as to allow the indexing robot 26 to index the L frame onto the processing table 99. Therefore, at any station where the jig 9 is required to loosen the L frame, the driving part is arranged at the corresponding position below.

Referring to fig. 12 and 13, the automatic feeding device B includes a first feeding mechanism 31, a second feeding mechanism 32, a first material taking mechanism, a second material taking mechanism, a first pre-positioning mechanism 51, and a second pre-positioning mechanism 52, where the first feeding mechanism 31 and the second feeding mechanism 32 are used to store and convey a tray for loading an L frame, and the first pre-positioning mechanism 51 and the second pre-positioning mechanism 52 are used to pre-position the L frame to ensure that the L frame is correctly positioned when being placed into the jig 9. The first material taking mechanism comprises a first material taking manipulator 41 for taking and placing the L frames from the first feeding mechanism 31 to the first pre-positioning mechanism 51 and a first feeding manipulator 42 for taking and placing the L frames from the first pre-positioning mechanism 51 to the jigs 9 of the first feeding station 11. The second material taking mechanism comprises a second material taking manipulator 43 for taking and placing the L frames from the second feeding mechanism 32 to the second pre-positioning mechanism 52 and a second feeding manipulator 44 for taking and placing the L frames from the second pre-positioning mechanism 52 to the jigs 9 of the second feeding station 12. The two L-frames on the jig 9 need to be connected in a ring shape, so that the placement positions of the two L-frames are centrosymmetric, so that two feeding mechanisms are used for feeding, and two L-frames in the trays respectively loaded in the two feeding mechanisms are already in a symmetric state.

The first feeding mechanism 31 includes a guide rail for bearing the material tray, one end of the guide rail is a material taking position 311, the other end of the guide rail is provided with a loading mechanism 33 capable of accommodating a plurality of stacked material trays, the first feeding mechanism 31 further includes a material pushing mechanism (not shown) for pushing the lowest material tray in the loading mechanism 33 to the material taking position 311 along the guide rail, the material pushing mechanism is arranged below the guide rail, and the guide rail and the material pushing mechanism are both blocked by the material trays and cannot be displayed in the drawing. The loading mechanism 33 includes two limiting members 331 disposed opposite to each other and a bracket assembly 332 located below the two limiting members 331, and the stacked trays are located between the two limiting members 331.

As shown in fig. 14 and 15, the bracket assembly 332 includes a bracket 333, two support plates 334 disposed on both sides of the bracket 333 and capable of moving inward to be inserted between two trays, a first elevation driving device 335 for driving the bracket 333 to ascend and descend, and a second elevation driving device 336 for driving the first elevation driving device 335 to ascend and descend. The bracket 333 includes two spaced apart brackets 338 with the support tabs 334 located outside of the brackets 338. The first elevation driving device 335 and the second elevation driving device 336 are both air cylinders, and the two supporting plates 334 are driven by the air cylinders to move inside and outside. In the loading mechanism 33, the piston rods of the first elevation driving device 335 and the second elevation driving device 336 are both in the extended position in the initial state, the stacked trays are firstly carried on the two supporting arms 338, when the tray starts to be conveyed, the piston rod of the second elevation driving device 336 retracts to make the bracket 333 descend to the position of the supporting piece 334 to be aligned between the two bottommost trays, and then the two supporting pieces 334 are inserted between the two trays. Finally, the piston rod of the first lifting drive device 335 retracts to make the bracket 333 descend again to place the lowest tray separated by the support piece 334 on the guide rail, and the tray is pushed to the material taking position 311 by the material pushing mechanism. The first elevation drive 335 and the second elevation drive 336 are raised again to lift the stack of trays, and the process of delivering out the bottommost tray as described above may be repeated.

With reference to fig. 13 and 16, two first pre-positioning mechanisms 51 and two second pre-positioning mechanisms 52 are respectively disposed in front of the first feeding mechanism 31 and the second feeding mechanism 32, and the four pre-positioning mechanisms are all disposed on the horizontal sliding table 34 so as to be capable of sliding horizontally, and when the pre-positioning mechanisms slide away from the feeding mechanisms, the pre-positioning mechanisms are located closer to the rotary table 1. One of the two first pre-positioning mechanisms 51 is close to the first feeding mechanism 31, the first material taking manipulator 41 takes and places the L frame in the tray onto the first pre-positioning mechanism 51, then the first pre-positioning mechanism 51 moves forward to be close to the turntable 1, meanwhile, the other first pre-positioning mechanism 51 moves backward to be close to the first feeding mechanism 31, the first material feeding manipulator 42 takes and places the L frame in the first pre-positioning mechanism 51 which has moved forward onto the jig 9, and meanwhile, the first material taking manipulator 41 places the L frame into the other first pre-positioning mechanism 51 which has moved backward. By arranging the two first pre-positioning mechanisms 51 to alternately move back and forth, the first material taking manipulator 41 and the first material loading manipulator 42 can be kept in a cooperative working state, and the material loading efficiency is improved.

Referring to fig. 16 and 17, the first pre-positioning mechanism 51 includes a positioning platform 511, a fixed positioning portion 512 fixed on the positioning platform 511 in a protruding manner and matching with the L-frame in shape, a movable positioning portion 513 slidably disposed on the positioning platform 511, and a driving device 514 for driving the movable positioning portion 513 to slide to press the L-frame against the fixed positioning portion 512. Specifically, the fixed positioning portion 512 includes three protruding columns in the embodiment, one of the three protruding columns is located at a position corresponding to a corner of the L-frame, and the other two protruding columns respectively correspond to a long side and a short side of the L-frame, and the movable positioning portion 513 is also in an L shape corresponding to the L-frame and having a corner. The L frame is placed between the fixed positioning portion 512 and the movable positioning portion 513, and then the movable positioning portion 513 slides toward the fixed positioning portion 512, so that the L frame is abutted against the three protruding columns, thereby realizing the pre-positioning of the L frame. After pre-positioning, the first feeding manipulator 42 can ensure the accurate position of the L frame when taking and placing the L frame on the jig 9. The positioning platform 511 of the first pre-positioning mechanism 51 has a plurality of fixed positioning portions 512 and a plurality of movable positioning portions 513, and can pre-position a plurality of L frames at a time. Specifically, the movable positioning portions 513 are linked by a linking member 515, the driving device 514 drives the linking member 515 to slide on the positioning platform 511, so that the movable positioning portions 513 slide synchronously, and the driving device 514 is an air cylinder.

As shown in fig. 18, the first material taking manipulator 41 includes a material taking assembly 411 and a three-axis manipulator for driving the material taking assembly 411 to move, the material taking assembly 411 includes a mounting plate 412 and a plurality of material taking clamping jaws 414 mounted at a lower end of the mounting plate 412, and the material taking clamping jaws 414 can clamp and take the L frame away or release and put the L frame down. It should be noted that the tray is configured to allow the pickup jaws 414 to be inserted into and grip the L-frame, with the L-frame only partially wrapped around the tray so that it can be held in a horizontal position, i.e., in the top view of fig. 1. The first loading robot 42 also has a loading jaw that grips the L-frame, and may or may not have the same configuration as the pickup jaw 414.

The second feeding mechanism 32, the second material taking mechanism and the second pre-positioning mechanism 52 have the same structure as the first feeding mechanism 31, the first material taking mechanism and the first pre-positioning mechanism 51. Of course, if the position accuracy of taking and placing the L frame on the jig 9 from the tray can be ensured, the pre-positioning mechanism can be omitted, and the first material taking mechanism only comprises one manipulator.

Referring back to fig. 12 and 13, two tray collecting mechanisms 35 are arranged behind the material taking positions 311 of the first feeding mechanism 31 and the second feeding mechanism 32, i.e., at the ends departing from the first pre-positioning mechanism 51 and the second pre-positioning mechanism 52, an inclined lower sliding plate 36 is arranged between the tray collecting mechanism 35 and the first feeding mechanism 31 and the second feeding mechanism 32, and a material pushing mechanism moving back and forth is further arranged below the first feeding mechanism 31 and the second feeding mechanism 32, and the material pushing mechanism can push or pull empty trays on the material taking positions 311 backwards to enable the trays to slide into the tray collecting mechanism 35 along the lower sliding plate 36 and be stacked one by one, so that the whole stacked trays are taken out of the tray collecting mechanism after the empty trays are full.

Referring to fig. 19 to 21, the automatic blanking apparatus C is similar in structure to the automatic feeding apparatus B, and includes a material receiving mechanism 6 for conveying a tray and a third material taking mechanism 7 that is actuated between the material receiving mechanism 6 and the blanking station 13. The material receiving mechanism 6 comprises a guide rail for bearing the material tray, and the guide rail is provided with an empty tray loading mechanism 61, a full tray transferring mechanism 62 and a loading position 60 between the empty tray loading mechanism 61 and the full tray transferring mechanism 62. The material receiving mechanism 6 is also provided with a material pushing mechanism positioned below the guide rail, the material pushing mechanism sends the empty tray in the empty tray loading mechanism 61 to the material loading position 60, the third material taking mechanism 7 takes the material from the jig 9 of the blanking station 13 and places the material on the empty tray, and the full tray is sent to the full tray loading mechanism 62. The empty tray loading mechanism 61 and the full tray loading mechanism 62 are provided with the same bracket assembly 332 as that of the first feeding mechanism 31 to realize the one-by-one feeding or taking-in of the trays.

The automatic blanking device C further comprises a transition positioning table 81 positioned between the material loading position 60 and the blanking station 13 and an NG discharging channel 82 positioned below the guide rail, wherein the transition positioning table 81 is provided with a positioning L-shaped frame structure, and the NG discharging channel 82 is obliquely arranged and can send NG products placed on the transition positioning table to other positions. The third material taking mechanism 7 includes a first blanking robot 71 that operates between the blanking station 13 and the transition positioning table 81, and a second blanking robot 72 that operates between the transition positioning table 81 and the loading station 60. The first blanking manipulator 71 includes a blanking assembly 711 and a discharging assembly 712, the blanking assembly 711 is responsible for taking and placing the L-frames on the blanking station 13 onto the transition positioning table 81, and the discharging assembly 712 is responsible for taking and placing NG products that are not qualified therein onto the NG discharging channel 82. Referring to fig. 22, the blanking assembly 711 includes a supporting jaw 714 located at the inner side and a clamping jaw 715 located at the outer side, and when the L-frame is grasped, the supporting jaw 714 is inserted between the two L-frames for supporting, and then the clamping jaw 715 is retracted to clamp the L-frame. The gripping structure in the discharging assembly 712 and the second discharging robot 72 may be the same as the discharging assembly 711.

The above disclosure is only a preferred embodiment of the present invention, and the function is to facilitate the understanding and implementation of the present invention, which is not to be construed as limiting the scope of the present invention, and therefore, the present invention is not limited to the claims.

Claims (10)

1. The utility model provides a L frame automatic weld equipment which characterized in that: the automatic feeding device and the automatic discharging device are arranged adjacent to the welding processing device;

the welding processing device comprises a rotary table, a first welding machine and a second welding machine, a plurality of jigs are arranged on the rotary table along the circumferential direction, the jig can be positioned at a first feeding station, a second feeding station, a first welding station, a second welding station and a blanking station in sequence along with the rotation of the turntable, the first welding machine and the second welding machine respectively correspond to the first welding station and the second welding station, the jig comprises a bottom plate, a central positioning block which is fixed on the bottom plate and can be used for two L-shaped frames to surround and attach to the outer sides of the central positioning block, and two abutting clamping claws which are arranged on the bottom plate in a sliding manner and are positioned at two sides of the central positioning block, the length and the width of the central positioning block correspond to the sizes of the long edge and the short edge of the L frame respectively, and the propping clamping jaws can be close to the central positioning block in a sliding manner so as to prop the corresponding L frame to the central positioning block tightly or be far away from the central positioning block in a sliding manner;

the automatic feeding device comprises a first feeding mechanism, a second feeding mechanism, a first material taking mechanism and a second material taking mechanism, wherein the first feeding mechanism is used for conveying a material tray for loading the L frame, the first material taking mechanism acts between the first feeding mechanism and the first feeding station to take and place the L frame into a jig of the first feeding station, and the second material taking mechanism acts between the second feeding mechanism and the second feeding station to take and place the L frame into a jig of the second feeding station;

the automatic blanking device comprises a material receiving mechanism used for conveying a material tray and a third material taking mechanism actuated between the material receiving mechanism and a blanking station.

2. The L-frame automatic welding apparatus of claim 1, wherein: the center positioning block is of an I-shaped structure and comprises two short edge end portions which are located at two ends and correspond to the short edges of the L frame and a connecting portion which is connected between the two short edge end portions, and the abutting clamping jaw is used for abutting against the long edge of the L frame and comprises two abutting claws which face the two short edge end portions.

3. The L-frame automatic welding apparatus of claim 1, wherein: the pushing clamping jaw is fixed on a sliding block which is arranged on the bottom plate in a sliding mode, a fixing piece is arranged on the outer side of the bottom plate, and an elastic piece which pushes the sliding block to the central positioning block is arranged between the fixing piece and the sliding block.

4. The L-frame automatic welding apparatus of claim 3, wherein: the jig comprises a base plate, a bottom plate, a central positioning block, a supporting clamping jaw, a rotating disc and a driving piece, wherein the base plate is provided with a positioning platform which is opposite to the base plate and is suspended, the central positioning block is fixed on the positioning platform, the supporting clamping jaw supports an L frame tightly against the central positioning block, one end, close to the inner, of the sliding block is positioned below the positioning platform, the driving piece is arranged below the base plate and can be opposite to the base plate, the lower end of the driving piece downwards penetrates through the rotating disc, the automatic welding equipment for the L frame further comprises the driving piece positioned below the rotating disc, the rotating disc rotates to the driving piece, when the driving piece is in contact with the driving piece, the driving piece drives the driving piece to ascend, and the upper end of the driving piece penetrates through the base plate.

5. The L-frame automatic welding apparatus of claim 1, wherein: the automatic feeding device also comprises a first pre-positioning mechanism positioned between the first feeding mechanism and the first feeding station and a second pre-positioning mechanism positioned between the second feeding mechanism and the second feeding station, wherein the first material taking mechanism acts among the first feeding mechanism, the first pre-positioning mechanism and the first feeding station, and the second material taking mechanism acts among the second feeding mechanism, the second pre-positioning mechanism and the second feeding station;

the first pre-positioning mechanism comprises a positioning platform, a fixed positioning part which is convexly fixed on the positioning platform and is matched with the L frame in shape, a movable positioning part which is arranged on the positioning platform in a sliding mode, and a driving device which drives the movable positioning part to slide so as to enable the L frame to be tightly abutted to the fixed positioning part.

6. The L-frame automatic welding apparatus of claim 5, wherein: first feeding mechanism gets including following the L frame first feeding mechanism gets and puts first material taking manipulator of first prepositioning mechanism and follow the L frame first prepositioning mechanism gets and puts the first material loading manipulator of the tool of first material loading station, first material taking manipulator has the material clamping jaw, first material loading manipulator has the material loading clamping jaw.

7. The L-frame automatic welding apparatus of claim 1, wherein: first feeding mechanism is including bearing the guide rail of charging tray, the one end of guide rail is for getting the material position, the other end of guide rail is equipped with can hold a plurality of superpositions the loading mechanism of charging tray, first feeding mechanism still including with the lowest one in the loading mechanism the charging tray is followed guide rail propelling movement extremely get the pushing equipment of material level, loading mechanism includes two locating parts that set up relatively, is located two the locating part below can hold up the bracket of charging tray, locate the bracket both sides can inwards move and insert two support pieces between the charging tray, order about the first lift drive that the bracket goes up and down and order about the second lift drive that first lift drive goes up and down.

8. The L-frame automatic welding apparatus of claim 1, wherein: receiving agencies is including bearing the guide rail of charging tray, have empty set loading mechanism, full set reprint mechanism that are located both ends on the guide rail and be located empty set loading mechanism and full set reprint loading position between the mechanism, automatic unloader still includes one and is located the loading position with transition location platform between the unloading station, third picking mechanism includes the unloading station with first unloading manipulator that moves between the transition location platform and the second unloading manipulator that moves between transition location platform and the loading position.

9. The L-frame automatic welding apparatus of claim 1, wherein: the automatic welding jig is characterized in that the turntable is further provided with a transposition station located on the downstream of the second welding station and at least one processing station located between the transposition station and the blanking station, the jig further comprises a processing table located on one side of the base plate, the processing table is provided with a groove and four positioning columns located on two sides of the groove, the automatic welding equipment for the L frames further comprises a transposition manipulator opposite to the transposition station, and the transposition manipulator takes down the two L frames after being welded and fixed from the central positioning block and sleeves the four positioning columns.

10. The L-frame automatic welding apparatus of claim 9, wherein: the transposition manipulator comprises a grabbing component for grabbing the L frame, the grabbing component comprises a mounting seat, a jacking part, an elastic part and two hooking claws, the jacking part is vertically connected to the lower portion of the mounting seat in a sliding mode, the elastic part elastically abuts against the portion between the mounting seat and the jacking part, the two hooking claws are located on two sides of the jacking part, the two hooking claws are mounted on the mounting seat and can be folded or unfolded relatively, the bottom of the two hooking claws is provided with hooking portions bent in opposite directions, and the two hooking portions and the jacking part are matched to grab the L frame.

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