CN216758656U - Automatic welding equipment for hollow hexagonal shaft and cam - Google Patents

Abstract

The utility model discloses automatic welding equipment for a hollow hexagonal shaft and a cam, wherein a plurality of positioning devices for the hexagonal shaft and the cam are arranged on a rotary platform along the circumference, the plurality of positioning devices correspond to manual feeding stations for manually placing the hexagonal shaft and the cam, a first automatic welding station for welding two symmetrical points of the hexagonal shaft and the cam is adopted by a first automatic welding device, a second automatic welding station for placing a rectangular block on the horizontal top edge of the hollow hexagonal shaft, compacting and welding is adopted by an automatic vibration conveying device and an automatic rotary grabbing device, and an automatic unloading station for jacking the hollow hexagonal shaft and the cam after the second welding is adopted by an automatic lifting device and grabbing the hollow hexagonal shaft and the cam after the second welding by an automatic unloading device. The hollow hexagonal shaft and the cam can be automatically and symmetrically welded for the first time by adopting the double welding guns, and the horizontal top edge and the rectangular block of the hollow hexagonal shaft can be automatically welded for the second time by adopting the double welding guns.

Description

Automatic welding equipment for hollow hexagonal shaft and cam

Technical Field

The utility model relates to the technical field of welding equipment, in particular to automatic welding equipment for a hollow hexagonal shaft and a cam.

Background

A metal part is often used in the fire prevention fume extractor of building, main length section is the hollow hexagonal axle of metal, the other end is the pipe of metal, the hexagon through-hole registrates in hollow hexagonal axle of a slice metallic cam is close to pipe department, the side that the pipe was kept away from to hollow hexagonal axle and cam needs the symmetry welding if spot welding, one side of hollow hexagonal axle if need be with two long limits of the rectangular block of a metal and this topside symmetry welding if spot welding on the topside when locating device during the horizontality, the effect of the rectangular block of this metal mainly is the degree of depth that increases the screw hole of establishing in this department.

However, in the prior art, the welding of the hollow hexagonal shaft and the cam and the welding of the rectangular block and the top edge are still performed manually, the positioning and clamping of the two times of welding are troublesome, the alignment accuracy is poor, the first welding and the second welding are performed intermittently due to scalding hands and the like, the operation is complex, the welding efficiency is low, the labor intensity of workers is high, and the welding quality is difficult to guarantee.

If the automatic welding equipment with the control system in the prior art is adopted to automatically weld the hollow hexagonal shaft and the cam, the requirement of automatic welding of the hollow hexagonal shaft and the cam cannot be met due to the following reasons: 1. generally, only one welding gun can be used for single-point welding, and the requirement of double-welding-gun welding of the hollow hexagonal shaft and the cam cannot be met. 2. The workpiece positioning device cannot meet the requirements for the embedding and pressing of the hexagonal shaft and the cam. 3. The welding gun device is difficult to meet the requirements of symmetrical arrangement, lifting and the like of double welding guns for twice welding. 4. The automatic welding equipment with control system of the prior art has no mechanism for sending the rectangular blocks to the top edge of the hexagonal shaft which is horizontal inside the positioning device after the first welding. 5. The ground wire of the welding gun is difficult to ensure automatic connection during welding and automatic cut-off during welding stop. 6. The discharging device is not suitable for grabbing the hollow hexagonal shaft and the cam after the second welding.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing automatic welding equipment which can automatically and symmetrically weld a hollow hexagonal shaft and a cam for the first time by adopting double welding guns and automatically weld the horizontal top edge of the hollow hexagonal shaft and the cam of a rectangular block for the second time by adopting the double welding guns.

The utility model provides automatic welding equipment for a hollow hexagonal shaft and a cam, which comprises a control system, a rack, an index plate electrically connected with the control system and fixed on the rack, a rotary platform concentrically connected with the index plate, a plurality of positioning devices for the hexagonal shaft and the cam arranged on the rotary platform along the circumference, a manual feeding station for at least manually placing the hexagonal shaft and the cam corresponding to the plurality of positioning devices, a first automatic welding station for welding two symmetrical points of the hexagonal shaft and the cam by using a first automatic welding device, a second automatic welding station for placing a rectangular block on the horizontal top edge of the hollow hexagonal shaft and pressing the rectangular block by using a rectangular block automatic conveying device and a rectangular block automatic rotating and grabbing device, and an automatic lifting device for placing the hollow hexagonal shaft and the cam after the second welding, And the automatic discharging device grabs out the automatic discharging station of the hollow hexagonal shaft and the cam after the second welding.

After adopting the structure, the automatic welding equipment for the hollow hexagonal shaft and the cam has the following advantages: the hollow hexagonal shaft and the cam to be welded are manually placed on the positioning device on the manual feeding station, and compared with a complex feeding device, the structure of the device is relatively simple. When the control system controls the rotary platform to rotate to the first automatic welding station, the first automatic welding device symmetrically welds the side faces of the hollow hexagonal shaft and the cam away from the circular tube as spot welding, when the control system controls the rotary platform to rotate to the second automatic welding station, the second automatic welding device symmetrically welds the two short edges of the rectangular block and the top edge of the horizontal hollow hexagonal shaft as spot welding, the automatic welding equipment can meet the requirement of the first double-welding-gun symmetric welding of the hollow hexagonal shaft and the cam, and can also meet the requirement of the second double-welding-gun symmetric welding of the long edge of the rectangular block and the top edge of the hollow hexagonal shaft. An operator only needs to initially place the hollow hexagonal shaft to be welded and the cam into the positioning device, all the other processes are automatically completed by the automatic welding equipment, the workpiece is relatively simple to position, the alignment accuracy is good, automatic welding is continuously performed, the operation is simple, the welding efficiency is high, the automation degree is high, the labor intensity of workers is low, and the welding quality is greatly improved.

Further, positioner includes the work piece storage tank that supplies the horizontal hollow hexagonal axle and the cam embedding of water, there is the polylith baffle in the work piece storage tank, respectively have one on every baffle and the horizontal base of the lower part of the horizontal hollow hexagonal axle, the trilateral shape of the size of these trilaterals of two hypotenuses looks adaptation is used for the gomphosis horizontal hollow hexagonal axle's of lower part trilateral groove, the work piece storage tank is interior to have the cam groove of holding vertically cam latter half and the circular tube groove of holding circular tube latter half, the first through-hole of jacking horizontal hollow hexagonal axle bottom behind the through-hole that supplies automatic lifting device to pass rotary platform from the bottom in addition, the second through-hole of jacking horizontal circular tube bottom simultaneously, circular tube groove and second through-hole unite two into one. After the structure is adopted, the hollow hexagonal shaft, the cam and the positioning device have good adaptability, the hollow hexagonal shaft and the cam are embedded into the rectangular block, and the rectangular block is placed, aligned and positioned accurately, reliably, quickly and conveniently, so that the requirements of positioning and pressing the hollow hexagonal shaft and the cam for realizing twice automatic welding can be completely met, and the requirements of jacking the hollow hexagonal shaft and the cam and automatic discharging can also be completely met.

Furthermore, the first automatic welding device comprises two first electric welding machines and two first welding guns, the respective first welding guns are electrically connected with the respective first electric welding machines through leads, one ends of respective ground wires are electrically connected with the respective first electric welding machines, and the other ends of the respective ground wires are electrically connected with the positioning device at the first automatic welding station through a first intermittent connection structure; the welding device is characterized by further comprising a first lifting cylinder fixed on the rack, a first lifting support frame is fixed at the free end of a first piston rod of the first lifting cylinder, a pressure rod used for pressing a hollow hexagonal shaft to be welded and the hollow hexagonal shaft in the cam is fixed on the first lifting support frame, two first welding gun fixing frames which are symmetrically arranged are further fixed on the first lifting support frame, and the upper parts of two first welding guns symmetrically positioned on the two sides of the pressure rod are fixed on the respective first welding gun fixing frames; and the first welding gun, the first intermittent connecting structure and the first lifting cylinder are all electrically connected with the control system. After the structure is adopted, the first welding gun, the first clearance type connecting mechanism and the first lifting cylinder are all electrically connected with the control system, and the opening and closing of the first welding gun, the on-off of the ground wire and the opening and closing of the first lifting cylinder, such as the opening and closing of the electromagnetic valve, are all controlled by the control system. When the first automatic welding is carried out, the control system controls the first lifting cylinder to drive the compression rod in the first automatic welding device to compress the hollow hexagonal shaft, meanwhile, the two first welding guns are aligned to two welding symmetrical points on the side face, far away from the circular tube, of the hollow hexagonal shaft and the cam, the control system controls the ground wire to be connected, and the two first welding guns are started to carry out the first automatic welding. The requirement of symmetrical welding of the hollow hexagonal shaft and the cam double-welding gun can be completely met. The first automatic welding device is full-automatic in terms of compressing the hollow hexagonal shaft and the cam, accurately aligning two welding points, connecting the ground wire and welding, and is high in automation degree, strong in pertinence, good in adaptability, small in labor intensity of workers, high in welding efficiency and good in welding quality.

Furthermore, two first mounting blocks which are symmetrically arranged are arranged on the rack, and the two first mounting blocks are fixed with two first lifting cylinders which are symmetrically arranged and act synchronously; the first lifting support frames are two first lifting support frames which are symmetrically arranged on the free ends of the respective first piston rods of the two first lifting cylinders; the pressure lever is fixed with a first lifting support frame. After the structure more than adopting, first lift cylinder is two of symmetry, and first liftable support frame also is two of symmetry setting, both can guarantee the automation of welding, accuracy and reliably go on in order to guarantee under control system's control that two first lift cylinders act in step, relative holistic first liftable support frame again, more easy to assemble, dismantle and the adjustment.

Furthermore, the automatic rectangular block conveying device comprises a circular vibration disc arranged on the rack beside the second automatic welding station and a straight vibration channel communicated with the circular vibration disc, the outlet of the straight vibration channel is provided with a rectangular block receiving platform which is driven by a horizontal cylinder to move inwards and outwards, the inner end of one side of the rectangular block receiving platform, which is close to the outlet of the straight vibration channel, is provided with a rectangular groove which is embedded with the rectangular block and extends along the length direction, the outer end of one side of the rectangular block receiving platform, which is close to the outlet of the straight vibration channel, is provided with a blocking strip for blocking the rectangular block from jumping out of the outlet, when the rectangular block receiving platform moves outwards, the rectangular groove is in a state of being over against the outlet and enabling the rectangular block to fall into the rectangular groove, when the rectangular block receiving platform moves inwards, the rectangular block is in a state to be clamped, and the blocking strip stops the state that the rectangular block in the direct vibration channel is led out of the outlet, and a motor and a horizontal cylinder, such as an electromagnetic valve, of the automatic rectangular block conveying device are electrically connected with an automatic control system. After the structure is adopted, the structure of the automatic rectangular block conveying device is simple, the control system controls the vibration motor of the automatic rectangular block conveying device to be started and stopped, the conveying process is smooth, stable and reliable, the control system controls the level of the inner and outer movement to the air cylinder such as the opening and closing of an electromagnetic valve, the rectangular groove of the linear reciprocating rectangular block receiving platform or the outer end is made to be in a state that the rectangular block is embedded into the rectangular groove, or the inner end is made to wait for the grabbing device to grab away the rectangular block in the rectangular groove, and meanwhile, the outer end blocking strip blocks the rectangular block from jumping out of the outlet. The design is ingenious, and the operation is simple, stable and reliable.

Furthermore, the automatic rotating and grabbing device for the rectangular block comprises a second lifting cylinder, a rotating cylinder is arranged at the free end of a second piston rod of the second lifting cylinder, a rotary plate of the rotating cylinder is connected with the middle of a ram, each first finger cylinder is symmetrically arranged at two ends of the ram, two first clamping jaws of the first finger cylinders on the outer side are used for penetrating into a rectangular groove of the rectangular block receiving platform to symmetrically grab two short edges of the rectangular block, and the first finger cylinders on the inner side are used for placing the grabbed rectangular block on the top edge of the hollow hexagonal shaft in the horizontal direction and compressing the rectangular block. The electromagnetic valves of the second lifting cylinder and the two first finger cylinders are electrically connected with a control system. After the structure is adopted, the mechanism that the vibrating device conveys the rectangular blocks on the material receiving platform to the top edge of the hexagonal shaft which is in a horizontal state after the rectangular blocks are welded for the first time is provided, the two first finger cylinders at the two ends of the ram synchronously descend or ascend, the first clamping jaw is also used for grabbing and releasing the rectangular blocks, the first clamping jaw at the inner end also has the function of pressing the two short edges of the rectangular blocks, so that the two symmetrical second welding guns can symmetrically weld the two long edges of the rectangular blocks and the horizontal top edge of the hollow hexagonal shaft, the grabbing, pressing and releasing automation of the rectangular blocks is realized, and the automation degree of equipment is higher.

Furthermore, the second automatic welding device comprises two second electric welding machines and two second welding guns, the respective second welding guns are electrically connected with the respective second electric welding machines through conducting wires, one ends of respective ground wires are electrically connected with the respective second electric welding machines, and the other ends of the respective ground wires are electrically connected with the positioning device at the second automatic welding station through a second intermittent connecting structure; two second mounting blocks are symmetrically arranged on the rack, and the two second mounting blocks are fixed with two third lifting cylinders which are symmetrically arranged and act synchronously; a second lifting support frame is arranged at the free end of a third piston rod of each third lifting cylinder; the second lifting support frames are fixed with respective second welding gun fixing frames which are symmetrically arranged, and two second welding guns which are used for symmetrically welding two long edges of the rectangular block and the horizontal top edge of the hollow hexagonal shaft are fixed on the respective second welding gun fixing frames; the two third piston rods are in an inclined state from outside to inside; and the second welding gun, the second intermittent connecting structure and the third lifting cylinder are all electrically connected with the control system. After the structure is adopted, the second welding gun, the second gap type connecting mechanism and the second lifting cylinder are all electrically connected with the control system, and the opening and closing of the second welding gun, the opening and closing of the ground wire, the opening and closing of the second lifting cylinder such as the opening and closing of the electromagnetic valve are all controlled by the control system. During automatic welding for the second time, the control system controls the second lifting cylinder and the first finger cylinder to firstly press the rectangular block and the hollow hexagonal shaft, meanwhile, the control system controls the third lifting cylinder to enable the two second welding guns to be aligned to two symmetrical welding points on the side face, far away from the circular tube, of the hollow hexagonal shaft and the cam, the control system controls the ground wire to be connected, and the two second welding guns are started to conduct automatic welding for the second time. The requirement of symmetrically welding the rectangular block and the horizontal hollow hexagonal shaft top edge by the double welding guns can be completely met. The automatic welding device for the second time is full-automatic in terms of accurate alignment of two welding points, connection of the ground wire and welding, and is high in automation degree, strong in pertinence, good in adaptability, low in labor intensity of workers, high in welding efficiency and good in welding quality. The second lifting cylinder is two of symmetry, and second liftable support frame also is two of symmetry setting, can be under control of control system the second lifting cylinder synchronization action in order to guarantee that welded automation, accuracy and reliable go on, relative holistic second liftable support frame again, more easy to assemble, dismantle and adjust.

Further, the first intermittent connection structure and the second intermittent connection structure for intermittently and electrically connecting the other end of the ground wire with the positioning device are both: the positioning device is made of metal materials, a metal column which penetrates through a through hole of the rotary platform and then protrudes downwards to the bottom surface of the rotary platform is fixed at the bottom of the positioning device, an automatic ground wire on-off cylinder which is electrically connected with the control system is arranged on a rack below the metal column, and a metal contact block which is used for connecting the other ends of two ground wires and is tightly attached to the bottom surface of the metal column during welding to conduct the ground wire or is separated from the metal column during welding stopping is fixed at the free end of a fourth piston rod of the automatic ground wire on-off cylinder. After the structure is adopted, the control system controls the ground wire automatic on-off cylinder to drive the fourth piston rod to enable the metal contact block to be tightly attached to the bottom surfaces of the two metal columns during welding, the hollow hexagonal shaft to be welded and the cam are conducted through the positioning device to achieve normal welding, and the control system controls the ground wire automatic on-off cylinder to drive the fourth piston rod to enable the metal contact block to be separated from the metal columns after welding is completed, so that the rotation of the rotary platform is not interfered. The intermittent connection structure of the ground wire is simple, the on-off is reliable, the automatic welding can be smoothly carried out, and the normal rotation and indexing of the index plate and the rotary platform of the automatic welding equipment can be ensured after the welding is finished, so that the automatic welding equipment has higher automation degree and better welding quality.

Furthermore, the automatic lifting device comprises a fourth lifting cylinder arranged on the rack below the automatic unloading station, and the free end of a fifth piston rod of the fourth lifting cylinder is provided with two jacking blocks which are used for penetrating through the rotating flat through hole, then penetrating into the first through hole and the second through hole of the positioning device and jacking the horizontal hollow hexagonal shaft and the horizontal round pipe; the automatic discharging device comprises an inner and outer moving mechanism, an up-down moving mechanism and two second clamping jaws, wherein the inner and outer moving mechanism and the up-down moving mechanism are arranged on the rack and electrically connected with the control system, the two second clamping jaws are arranged on the up-down moving mechanism and used for grabbing the hollow hexagonal shaft and the hollow hexagonal shaft in the cam after the two times of welding. Structure more than adopting, automatic lifting device's two kicking blocks with the level to hexagonal axle and the level upwards jacking to the pipe, automatic discharge device's two second clamping jaws mutually support, strong for hollow hexagonal axle and cam pertinence of unloading, and can inside and outside removal, can reciprocate again, automatic lifting device and automatic discharge device are multiple functional, can satisfy the hollow hexagonal axle after twice welding and cam automatic discharge's needs completely, further improved degree of automation.

Furthermore, the positioning device is also correspondingly provided with a sensor for detecting whether the positioning device is provided with an automatic detection station for detecting the hollow hexagonal shaft and the cam to be welded, and the manual feeding station, the automatic detection station, the first automatic welding station, the second automatic welding station and the automatic discharging station are uniformly arranged in a clockwise sequence along the circumference of the rotating platform. After the structure is adopted, the sensor detects whether the hollow hexagonal shaft and the cam to be welded exist or not in advance on the positioning device to be rotated to the first automatic welding station, and feeds an electric signal back to the control system, if so, the sensor enters an automatic welding program, and if not, the indexing disc and the rotary platform continue to rotate, so that misoperation is avoided, energy is saved, and welding efficiency is further improved. Five stations are arranged according to clockwise order and along circumference align to be 72 each other after arranging like two adjacent stations, more be favorable to the assurance of manual material loading time, and the regularity is stronger, and program control is more accurate.

Drawings

FIG. 1 is a schematic view of the structure of a hollow hexagonal shaft and cam to be welded.

FIG. 2 is a schematic view of a hollow hexagonal shaft and cam that has been twice welded.

Fig. 3 is a schematic perspective view of the automatic welding apparatus of the present invention.

Fig. 4 is a schematic perspective view showing a part of devices and components of the automatic welding equipment (mainly highlighting the rotary platform, the stations, the lifting device for jacking and the automatic discharging device) of the utility model with the cover removed.

Fig. 5 is a schematic perspective view of a positioning device according to the present invention.

Fig. 6 is a schematic perspective view of a positioning device according to the present invention.

Fig. 7 is a schematic perspective view of the first automatic welding apparatus according to the present invention (a small part of the left side of the rotary table is omitted).

Fig. 8 is a schematic perspective view of the first automatic welding apparatus of fig. 7 after the rotary platform and the ground wire automatic on-off cylinder are omitted and the first automatic welding apparatus rotates by about 180 °.

Fig. 9 is a schematic perspective view of the second automatic welding apparatus of the present invention (mainly showing the stations, the vibrating device, the material receiving platform, the rectangular block gripping device and the second automatic welding apparatus) with the housing removed, showing a part of the devices and components.

Fig. 10 is a third perspective view of the automatic welding apparatus of the present invention with the cover removed showing portions of the apparatus and components (the second automatic welding apparatus is highlighted).

Fig. 11 is a schematic perspective view showing a part of the apparatus and parts of the automatic welding apparatus of the present invention with the cover removed (mainly highlighting the shape of the two jacking blocks in the lifting device for jacking).

Fig. 12 is a schematic view of the structure of the index plate of the present invention.

Shown in the figure: 1. a cam, 2, a hollow hexagonal shaft, 3, a rectangular block, 4, a round pipe, 5, a control panel, 6, a housing, 7, a first electric welding machine, 8, a second electric welding machine, 9, a frame, 10, a rotary platform, 11, a first automatic welding device, 12, an internal and external moving cylinder, 13, a second automatic welding device, 14, a horizontal guide rod, 15, a third installation block, 16, a fifth lifting cylinder, 17, an automatic lifting device, 18, a top edge, 19, a positioning device, 20, a second finger cylinder, 21, a workpiece accommodating groove, 22, a partition plate, 23, a three-sided groove, 24, a second through hole, 25, a first through hole, 26, a counter bore, 27, a cam groove, 28, a metal column, 29, a compression rod, 30, a first piston rod, 31, a first installation block, 32, a first lifting cylinder, 33, a first welding gun, 34, a first support frame, 35 and a first welding gun, 36. a metal contact block, 37, an automatic ground wire on-off cylinder, 38, a hollow hexagonal shaft and cam to be welded, 39, a manual feeding station, 40, an automatic detection station, 41, a first automatic welding station, 42, an automatic rectangular block rotating and grabbing device, 43, a first finger cylinder, 44, a first clamping jaw, 45, an automatic rectangular block conveying device, 46, a rectangular groove, 47, a straight vibration channel, 48, a circular vibration disc, 49, a blocking strip, 50, a rectangular block receiving platform, 51, a ram, 52, a rotating cylinder, 53, a horizontal cylinder, 54, a second lifting cylinder, 55, a second automatic welding station, 56, an automatic discharging station, 57, a second welding gun fixing frame, 58, a third piston rod, 59, a second mounting block, 60, a third lifting cylinder, 61, a second lifting support frame, 62, a second welding gun, 63, a first jacking block, 64 and a fifth piston rod, 65. the automatic unloading device comprises a fourth lifting cylinder, a 66, a second ejector block, a 67, an index plate, a 68, a servo motor, a 69, a button, a 70, a connecting plate, a 71, a sixth piston rod, a 72, an automatic unloading device, a 73, a second piston rod, a 74, a rotary disc, a 75 and a second clamping jaw.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It is to be noted that the description of the embodiments is provided to aid understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2, and 4, a metal part is often used in a fire-proof smoke exhaust device of a building in the prior art, a main length section is a metal hollow hexagonal shaft 2, the other end is a metal circular tube 4, a hexagonal through hole of a one-piece metal cam 1 is sleeved at a position, close to the circular tube 4, of the hollow hexagonal shaft 2, the side faces, far away from the circular tube 4, of the hollow hexagonal shaft 2 and the cam 1 need to be symmetrically spot-welded, one side of the hollow hexagonal shaft 2, such as a top side 18 in a horizontal state in a positioning device 19, needs to symmetrically weld, such as spot-welded, two long sides of a metal rectangular block 3 and the horizontal top side 18, and the metal rectangular block 3 mainly serves to increase the depth of a threaded hole formed at the position.

As shown in fig. 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12.

The utility model discloses automatic welding equipment for a hollow hexagonal shaft and a cam, which comprises a control system, a rack 9, an index plate 67 electrically connected with the control system and fixed on the rack 9, and a rotary platform 10 concentrically connected with the index plate 67. The above sentence can also be expressed as follows: comprises a control system, a frame 9 and a rotating platform 10 which is controlled by the control system and is fixed on an index plate 67 arranged on the frame 9.

The utility model relates to automatic welding equipment for a hollow hexagonal shaft and a cam, which can also be called a special welding production line for automatically welding the hollow hexagonal shaft and the cam. In other words, the automatic welding apparatus is used to weld the hollow hexagonal shaft with the cam and weld a rectangular block 3. The control system may also be referred to as a control assembly or control device. The rotary platform 10 may also be referred to as a rotary platform or a rotary working platform. The index plate 67 is a commercially available product, is a mature prior art, and can also be called an index plate assembly or an index motor assembly or an index plate assembly, and the index plate 67 is generally driven by a servo motor 68, and can also be driven by a stepping motor or a rotary cylinder. It will be understood that the present invention employs a horizontal indexing disk 67, with the rotary platform 10 being concentrically connected to the indexing disk 67.

The frame 9 is used for supporting various devices, such as the dividing disc 67 and the rotary platform 10 are arranged in the middle of the frame 9, the control system is dispersedly arranged on the frame 9, the control system generally comprises a main controller, such as a PLC (programmable logic controller), an air source control component and various components, such as a relay, a sensor and the like, such as a sensor arranged on the frame 9 above the automatic detection station 40 of the rotary platform 10, a first automatic welding device 11 arranged on the frame 9 above the first automatic welding station 41 of the rotary platform 10, a rectangular block automatic conveying device 45 and a rectangular block automatic rotary grabbing device 42 arranged on the frame 9 below and beside the second automatic welding station 55 of the rotary platform 10, a second automatic welding device 13 arranged on the frame 9 above the second automatic welding station 55 of the rotary platform 10, and an automatic lifting device 17 for a hollow hexagonal shaft and a cam arranged on the frame 9 below the second automatic welding station 55 of the rotary platform 10, The automatic discharge device 72 is provided on the frame 9 above the automatic discharge station 56 of the rotary platform 10.

The automatic welding equipment for the hollow hexagonal shaft and the cam further comprises a housing 6, and a control panel 5 and a button 69 are mounted on the housing 6.

The rotary platform 10 is circumferentially provided with a plurality of positioning devices 19 for hexagonal shafts and cams, the plurality of positioning devices 19 at least correspond to a manual feeding station 39 for manually placing the hexagonal shafts and the cams, a first automatic welding station 41 for welding two symmetrical points of the hexagonal shafts and the cams by adopting a first automatic welding device 11, a second automatic welding station 55 for placing the rectangular blocks 3 on the horizontal top edges 18 of the hollow hexagonal shafts 2 by adopting a rectangular block automatic conveying device 45 and a rectangular block automatic rotary grabbing device 42 and pressing the rectangular blocks, and welding two symmetrical points at the two long edges of the top edges 18 and the rectangular blocks 3 by adopting a second automatic welding device 13, and an automatic discharging station 56 for jacking the hollow hexagonal shafts and the cams after the second welding by adopting an automatic lifting device 17 and grabbing the hollow hexagonal shafts and the cams after the second welding by an automatic discharging device 72. Baffles for preventing flame from flickering and damaging the eyes of a feeding operator in the welding process are arranged on the frame 9 between the first automatic welding station 41, the second automatic welding station 55 and the manual feeding station 39. The setting of baffle has effectively protected operation workman's eyes not by the injury, and the spark produces the interference to operation workman when preventing the welding to guarantee operation workman safety work. It will be understood that the horizontal top edge 18 described above refers to the horizontal top edge 18 of the hollow hexagonal shaft 2 within the locating means 19 located on the second automated welding station 55 on the rotary platform 10.

The positioning device 19 comprises a hollow hexagonal shaft in the horizontal direction and a workpiece accommodating groove 21 in which the cam is embedded, a plurality of partition plates 22 are arranged in the workpiece accommodating groove 21, each partition plate 22 is provided with a bottom edge matched with the lower part of the hollow hexagonal shaft in the horizontal direction, and three side grooves 23 matched with the three sides of the two inclined edges in size and shape and used for embedding the lower part of the hollow hexagonal shaft in the horizontal direction, the workpiece accommodating groove 21 is also internally provided with a cam groove 27 for accommodating the lower half part of the vertical cam 1 and a circular tube groove for accommodating the lower half part of the circular tube 4, two jacking blocks of the automatic lifting device 17 penetrate through the through hole of the rotary platform 10 from the bottom and then jack up a first through hole 25 at the bottom of the hollow hexagonal shaft in the horizontal direction, and jack up a second through hole 24 at the bottom of the circular tube 4 in the horizontal direction simultaneously, and the circular tube groove and the second through hole 24 are combined into a whole. As shown in fig. 4 and 9, the positioning device 19 may be a rectangular parallelepiped, and is disposed inside and outside on the rotary platform 10 along the length direction, and the hollow hexagonal shaft and the cam 1 embedded in the workpiece accommodating groove 21 of the positioning device 19 are located at one end close to the edge of the rotary platform 10. Four corners of the rectangular positioning device 19 may have a counter bore 26, and four screws correspondingly penetrate through the counter bores 26 and are screwed into four threaded holes of the rotary platform 10. The positioning device 19 may also be referred to as a welding jig. The workpiece receiving groove 21 may also be referred to as a recess.

The first automatic welding device 11 comprises two first welding machines 7 and two first welding guns 35, wherein the respective first welding guns 35 are electrically connected with the respective first welding machines 7 through conducting wires, one ends of respective ground wires are electrically connected with the respective first welding machines 7, and the other ends of the respective ground wires are electrically connected with the positioning device 19 at the first automatic welding station 41 through a first intermittent connecting structure. The first automatic welding device 11 further comprises a first lifting cylinder 32 fixed on the frame 9, a first lifting support frame 34 is fixed at the free end of a first piston rod 30 of the first lifting cylinder 32, a press rod 29 used for pressing a hollow hexagonal shaft to be welded and the hollow hexagonal shaft 2 in a cam 38 is fixed on the first lifting support frame 34, two first welding gun fixing frames 33 symmetrically arranged are further fixed on the first lifting support frame 34, and the upper portions of two first welding guns 35 symmetrically positioned at two sides of the press rod 29 are fixed on the respective first welding gun fixing frames 33. The first welding gun 35, the first intermittent connection structure such as the electromagnetic valve of the ground wire automatic on-off cylinder 37 and the electromagnetic valve of the first lifting cylinder 32 are all electrically connected with the control system.

Two first mounting blocks 31 are symmetrically arranged on the frame 9, and the two first mounting blocks 31 are fixed with two first lifting cylinders 32 which are symmetrically arranged and synchronously act. The first lifting support frames 34 may be two first lifting support frames 34 symmetrically disposed on the free ends of the respective first piston rods 30 of the two first lifting cylinders 32. The pressing rod 29 is fixed with one of the first liftable supporting frames 34.

Rectangular block automatic conveyor 45 shakes the dish 48 and shakes the straight channel 47 that shakes with the circle on the frame 9 by automatic weld station 55 for the second time including locating, directly shake the exit of channel 47 and have one by the level to cylinder 53 drive inside and outside rectangular block that removes to connect material platform 50, if the level is fixed on frame 9 to cylinder 53, the horizontal board sliding fit of the L font of rectangular block connects material platform 50 is on frame 9, the level is fixed to the L font of rectangular block's piston rod and rectangular block connects the riser of material platform 50 to the free end of cylinder 53's piston rod. The inner end of one side of the rectangular block receiving platform 50, which is close to the outlet of the straight vibration channel 47, is provided with a rectangular groove 46 which is embedded with the rectangular block 3 and extends along the length direction, the outer end of one side of the rectangular block receiving platform 50, which is close to the outlet of the straight vibration channel 47, is provided with a blocking strip 49 which blocks the rectangular block 3 from jumping out of the outlet, when the rectangular block receiving platform 50 moves outwards, the rectangular groove 46 is in a state of facing the outlet and enabling the rectangular block 3 to fall into the rectangular groove 46, when the rectangular block receiving platform 50 moves inwards, the rectangular block 3 is in a state of being clamped, and the blocking strip 49 blocks the rectangular block 3 in the straight vibration channel 47 from jumping out of the outlet, and motors of the automatic rectangular block conveying device 45, such as a vibration motor and an electromagnetic valve of the horizontal cylinder 53, are electrically connected with an automatic control system.

The automatic rectangular block rotating and grabbing device 42 comprises a second lifting cylinder 54, a rotating cylinder 52 is arranged at the free end of a second piston rod 73 of the second lifting cylinder 54, a rotary disc 74 of the rotating cylinder 52 is connected with a picking rod 51 or the middle of a picking plate, two first finger cylinders 43 are symmetrically arranged at two ends of the picking rod 51, two first clamping jaws 44 of the first finger cylinders 43 at the outer side are used for symmetrically grabbing two short sides of a rectangular block 3 in a rectangular groove 46 of the rectangular block receiving table 50, and the first finger cylinders 43 at the inner side are used for placing the grabbed rectangular block 3 on the horizontal top edge 18 of the hollow hexagonal shaft 2 and pressing the grabbed rectangular block. The respective solenoid valves of the second lifting cylinder 54 and the two first finger cylinders 43 are electrically connected to the control system.

The second automatic welding device 13 includes two second welding machines 8 and two second welding guns 62, the respective second welding guns 62 are electrically connected to the respective second welding machines 8 through wires, one ends of respective ground wires are electrically connected to the respective second welding machines 8, and the other ends of the respective ground wires are electrically connected to the positioning device 19 at the second automatic welding station 55 through a second intermittent connection structure. Two second mounting blocks 59 are symmetrically arranged on the frame 9, and the two second mounting blocks 59 are fixed with two third lifting cylinders 60 which are symmetrically arranged and synchronously act. A second lifting support frame 61 is arranged at the free end of the third piston rod 58 of each third lifting cylinder 60, and the second lifting support frame 61 can be an L-shaped frame. The second liftable supporting frames 61 are fixed with respective second welding gun fixing frames 57 which are symmetrically arranged, and two second welding guns 62 which are used for symmetrically welding the two long sides of the rectangular block 3 and the horizontal top side 18 of the hollow hexagonal shaft 2 are fixed on the respective second welding gun fixing frames 57. The two third piston rods 58 are inclined from the outside upward to the inside downward. The inclined state is convenient for the two second welding guns 62 to be folded to two welding points when the welding device descends to the welding horizontal height, and is also convenient for the two welding guns to not interfere with other devices such as the rotation of the ram 51 after the welding device ascends. The second welding gun 62, the second intermittent connection structure such as the electromagnetic valve of the ground wire automatic on-off cylinder 37 and the electromagnetic valve of the third lifting cylinder 60 are all electrically connected with the control system.

The first intermittent connection structure and the second intermittent connection structure for intermittently and electrically connecting the other end of the ground wire with the positioning device 19 can be as follows: the positioning device 19 is made of metal material, a metal column 28 which penetrates through a through hole of the rotary platform 10 and then protrudes downwards to the bottom surface of the rotary platform 10 is fixed at the bottom of the positioning device 19, an automatic ground wire on-off cylinder 37 which is electrically connected with a control system is arranged on the rack 9 below the metal column 28, and a metal contact block 36 which is connected with the other ends of two ground wires and used for being tightly attached to the bottom surface of the metal column 28 during welding to conduct the ground wire or be separated from the metal column 28 during welding stopping is fixed at the free end of a fourth piston rod (not marked in the figure) of the automatic ground wire on-off cylinder 37. The metal contact block 36 may also be referred to as a metal contact plate or a metal contact.

When the control system controls the automatic rectangular block conveying device 45 to feed materials, the control system controls the circular vibration disc 48 and the straight vibration channel 47 to transversely push the rectangular blocks 3 into the rectangular grooves 46 of the rectangular block receiving table 50 which are moved outwards and connected at the outlet, then the rectangular block receiving table 50 is moved inwards, at the moment, the blocking strips 49 seal the outlet of the straight vibration channel 47, the control system controls the automatic rectangular block rotary grabbing device 42 to grab the rectangular blocks 3 in the rectangular grooves 46 at two short sides, the rectangular blocks are rotated 180 degrees and placed at the welding position of the horizontal top side 18 of the hollow hexagonal shaft 2 on the positioning device 19 of the second welding station 55, the first clamping jaw 44 clamps the rectangular blocks 3, and after the second welding, the control system controls the next rectangular block to be conveyed, moved outwards, moved inwards, grabbed, placed and pressed and compacted.

When the control system controls the automatic welding device to automatically weld twice, the lifting cylinder is controlled to descend to the welding level, meanwhile, the pressing rod 29 or the first clamping jaw 44 presses the hollow hexagonal shaft 2 to be welded tightly, the automatic ground wire on-off cylinder 37 is controlled to connect the ground wire, and then two welding guns are controlled to weld like spot welding at the same time. After two times of welding, such as spot welding, the control system controls the lifting cylinder to ascend to the horizontal height when the lifting cylinder is not welded, and then controls the index plate 67 and the rotary platform 10 to rotate to the next index position.

The automatic lifting device 17 comprises a fourth lifting cylinder 65 arranged on the frame 9 below the automatic discharging station 56, and the free end of a fifth piston rod 64 of the fourth lifting cylinder 65 is provided with two jacking blocks which are used for penetrating through the through hole of the rotary platform 10, then penetrating into the first through hole 25 and the second through hole 24 of the positioning device 19 and jacking the horizontal hollow hexagonal shaft 2 and the horizontal circular tube 4. The shape and the size of the top notch of the first top block 63 are matched with the shape and the size of the bottom of the horizontal hollow hexagonal shaft 2, and the shape and the size of the top notch of the second top block 66 are matched with the shape and the size of the bottom of the horizontal circular tube 4. The ejector block may also be referred to as a ram.

The automatic discharging device 72 comprises an internal and external moving mechanism, an up-down moving mechanism and two second clamping jaws 75, wherein the internal and external moving mechanism and the up-down moving mechanism are arranged on the frame 9 and electrically connected with the control system, the two second clamping jaws 75 are arranged on the up-down moving mechanism, and the two second clamping jaws 75 are used for grabbing the hollow hexagonal shaft after two times of welding and the hollow hexagonal shaft 2 in the cam.

The automatic discharging device 72 may have a specific structure in which two third mounting blocks 15 are fixed to the frame 9, two ends of two parallel horizontal guide rods 14 are fixed to the two third mounting blocks 15, an inner and outer moving cylinder 12 is slidably fitted on the two horizontal guide rods 14, a free end of a sixth piston rod 71 of the inner and outer moving cylinder 12 is fixed to the third mounting block 15 at the outer end, and a connecting plate 70 is fixed to the inner and outer moving cylinder 12. A fifth lifting cylinder 16 is fixed on the connecting plate 70, the free end of a seventh piston rod (not shown in the figure) of the fifth lifting cylinder 16 is connected with a second finger cylinder 20, and the free ends of the two piston rods of the second finger cylinder 20 are fixed with respective second clamping jaws 75 or second fingers. After adopting above structure, discharge apparatus simple structure, the operation is reliable and stable, and is swift smooth and easy, clamping jaw simple structure, and the operation is reliable and stable, and is swift smooth and easy, has further guaranteed the automation of automatic discharge process.

When the hollow hexagonal shaft 2 in the cam and the hollow hexagonal shaft after two times of welding is automatically grabbed, the control system controls two jacking blocks of the fourth lifting cylinder 65 to be upwards inserted into the first through hole 25 and the second through hole 24 of the positioning device 19, the hollow hexagonal shaft 2 and the circular tube 4 are lifted, the internal and external moving cylinder 12 is moved to be right above the hollow hexagonal shaft 2 of the positioning device 19, the fifth lifting cylinder 16 is controlled to be lowered to two second clamping jaws 75 positioned at two sides of the hollow hexagonal shaft 2, the second finger cylinder 20 is controlled to hold the two second clamping jaws 75, namely, the hollow hexagonal shaft 2 is grabbed, the control system controls the fifth lifting cylinder 16 to be lifted, and the internal and external moving cylinder 12 is controlled to be moved outwards, the second finger cylinder 20 is operated to release the two second jaws 75 in the opposite direction, and the welded hollow hexagonal shaft and cam fall into the drop chute and the collection container of the welded hollow hexagonal shaft and cam by their own weight.

It will be understood that, as described above, the piston rods of the remaining vertical cylinders are in a vertical state except for the third piston rod 58 of the third lift cylinder 60.

The finger cylinder can also be called a double-piston bidirectional cylinder. The clamping jaw can also be called a finger. The above-mentioned fixing is welding or screwing by using screw or bolt, etc. The above-mentioned play-out is also understood to mean a disengagement.

As shown in fig. 4, 7, 9, 10 and 11, for better guidance, two guide rods can be arranged in parallel on both sides of the piston rod between the piston rod of all the lifting cylinders and the driven plate or frame, the guide rods are fixed on the plate or frame, and two guide holes which are matched with the two guide rods in a sliding way are arranged on the lifting cylinders.

The positioning device 19 is also correspondingly provided with a sensor for detecting whether the hollow hexagonal shaft to be welded and the automatic detection station 40 of the cam 38 are arranged on the positioning device 19, and the manual feeding station 39, the automatic detection station 40, the first automatic welding station 41, the second automatic welding station 55 and the automatic discharging station 56 are uniformly arranged in a clockwise sequence and along the circumference of the rotary platform 10.

The number of the hollow hexagonal shaft and cam positioning devices 19 arranged along the circumference on the rotary platform 10 can be 5 which are uniformly arranged along the circumference. In the 5 positioning devices 19, a manual feeding station 39, an automatic detection station 40, a first automatic welding station 41, a second automatic welding station 55, and an automatic discharging station 56 may be arranged in a clockwise order, as shown in fig. 9, if the foremost positioning device 19 is set as the first positioning device, the first positioning device is the manual feeding station 39, the second positioning device is the automatic detection station 40, the third positioning device is the first automatic welding station 41, the third positioning device is the second automatic welding station 55, and the fifth positioning device is the automatic discharging station 56. The positioning device 19 corresponds to five stations, and it is also understood that the positioning device 19 is provided at the position of these five stations on the rotary platform 10. The five stations are uniformly arranged along the circumference, namely the rotary platform 10 is divided into five equal parts along the circle center, the five stations are respectively positioned on a bisector, and the bisectors of the adjacent stations are 72 degrees mutually.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an automatic weld equipment of hollow hexagonal axle and cam, includes control system, frame, is connected and fixes the graduated disk in the frame with control system electricity, the rotary platform who connects with the graduated disk is concentric, its characterized in that: the automatic welding device comprises a rotary platform, a plurality of positioning devices, a first automatic welding station, a second automatic welding station and an automatic discharging station, wherein the plurality of positioning devices at least correspond to manual feeding stations for manually placing the hollow hexagonal shafts and the cams, the first automatic welding station is used for welding two symmetrical points of the hollow hexagonal shafts and the cams by adopting a first automatic welding device, the second automatic welding station is used for placing the rectangular blocks on the top edges of the hollow hexagonal shafts in the horizontal direction and pressing the rectangular blocks by adopting a rectangular block automatic conveying device and a rectangular block automatic rotating and grabbing device, the second automatic welding device is used for welding the two symmetrical points of the top edges and the two long edges of the rectangular blocks, and the automatic discharging station is used for jacking the hollow hexagonal shafts and the cams after the second welding by adopting an automatic lifting device and grabbing the hollow hexagonal shafts and the cams after the second welding by the automatic discharging device.

2. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 1, characterized in that: the positioning device comprises a hollow hexagonal shaft and a workpiece accommodating groove, wherein the hollow hexagonal shaft is horizontally arranged, the cam is embedded into the workpiece accommodating groove, a plurality of partition plates are arranged in the workpiece accommodating groove, each partition plate is provided with a bottom edge which is horizontally arranged at the lower part of the hollow hexagonal shaft, the three edges of the two inclined edges are matched in size and shape and used for embedding three side grooves which are horizontally arranged at the lower part of the hollow hexagonal shaft, the workpiece accommodating groove is internally provided with a cam groove which is used for accommodating the vertical lower half part of the cam and a circular pipe groove which is used for accommodating the lower half part of the circular pipe, two jacking blocks which are used for an automatic lifting device lift the bottom of the hollow hexagonal shaft after penetrating through holes of the rotary platform from the bottom are used for jacking the first through hole at the bottom of the hollow hexagonal shaft, and simultaneously jacking the second through hole at the bottom of the circular pipe, and the circular pipe groove are combined into a whole.

3. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 1, characterized in that: the first automatic welding device comprises two first electric welding machines and two first welding guns, the respective first welding guns are electrically connected with the respective first electric welding machines through leads, one ends of respective ground wires are electrically connected with the respective first electric welding machines, and the other ends of the respective ground wires are electrically connected with the positioning device at the first automatic welding station through a first intermittent connection structure; the welding device is characterized by further comprising a first lifting cylinder fixed on the rack, a first lifting support frame is fixed at the free end of a first piston rod of the first lifting cylinder, a pressure rod used for pressing a hollow hexagonal shaft to be welded and the hollow hexagonal shaft in the cam is fixed on the first lifting support frame, two first welding gun fixing frames which are symmetrically arranged are further fixed on the first lifting support frame, and the upper parts of two first welding guns symmetrically positioned on the two sides of the pressure rod are fixed on the respective first welding gun fixing frames; and the first welding gun, the first intermittent connecting structure and the first lifting cylinder are all electrically connected with the control system.

4. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 3, characterized in that: the two first mounting blocks are fixed with the two first lifting cylinders which are symmetrically arranged and synchronously act; the first lifting support frames are two first lifting support frames which are symmetrically arranged on the free ends of the respective first piston rods of the two first lifting cylinders; the pressure lever is fixed with a first lifting support frame.

5. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 1, characterized in that: the automatic rectangular block conveying device comprises a circular vibration disc arranged on a rack beside a second automatic welding station and a straight vibration channel communicated with the circular vibration disc, wherein the outlet of the straight vibration channel is provided with a rectangular block receiving platform which is driven by a horizontal cylinder to move inwards and outwards, the inner end of one side of the rectangular block receiving platform, which is close to the outlet of the straight vibration channel, is provided with a rectangular groove which is embedded with a rectangular block and extends along the length direction, the outer end of one side of the rectangular block receiving platform, which is close to the outlet of the straight vibration channel, is provided with a blocking strip for blocking the rectangular block from jumping out of the outlet, when the rectangular block receiving platform moves outwards, the rectangular groove is in a state of being over against the outlet and enabling the rectangular block to fall into the rectangular groove, and when the rectangular block receiving platform moves inwards, the rectangular block is in a state to be clamped, and the blocking strip stops the state that the rectangular block in the direct vibration channel is led out of the outlet, and the motor and the horizontal cylinder of the automatic rectangular block conveying device are electrically connected with an automatic control system.

6. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 5, characterized in that: the automatic rectangular block rotating and grabbing device comprises a second lifting cylinder, a rotating cylinder is arranged at the free end of a second piston rod of the second lifting cylinder, a rotary table of the rotating cylinder is connected with the middle of a ram, two ends of the ram are symmetrically provided with a first finger cylinder, two first clamping jaws of the first finger cylinder on the outer side are used for penetrating into a rectangular groove of the rectangular block receiving platform to symmetrically grab two short edges of the rectangular block, and the first finger cylinder on the inner side is used for placing and pressing the grabbed rectangular block on the horizontal top edge of the hollow hexagonal shaft; the second lifting cylinder and the two first finger cylinders are electrically connected with the control system.

7. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 3 or 6, characterized in that: the second automatic welding device comprises two second electric welding machines and two second welding guns, the respective second welding guns are electrically connected with the respective second electric welding machines through leads, one ends of respective ground wires are electrically connected with the respective second electric welding machines, and the other ends of the respective ground wires are electrically connected with the positioning devices at the second automatic welding station through second intermittent connecting structures; two second mounting blocks are symmetrically arranged on the rack and fixed with two third lifting cylinders which are symmetrically arranged and act synchronously; a second lifting support frame is arranged at the free end of a third piston rod of each third lifting cylinder; the second welding gun fixing frames are symmetrically arranged and fixed on the second lifting support frames, and two second welding guns which are used for symmetrically welding two long edges of the rectangular block and the horizontal top edge of the hollow hexagonal shaft are fixed on the second welding gun fixing frames; the two third piston rods are in an inclined state from outside to top to inside; and the second welding gun, the second intermittent connecting structure and the third lifting cylinder are all electrically connected with the control system.

8. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 7, characterized in that: the first intermittent connecting structure and the second intermittent connecting structure for intermittently and electrically connecting the other end of the ground wire with the positioning device are both as follows: the positioning device is made of metal materials, a metal column which penetrates through a through hole of the rotary platform and then protrudes downwards to the bottom surface of the rotary platform is fixed at the bottom of the positioning device, an automatic ground wire on-off cylinder which is electrically connected with the control system is arranged on a rack below the metal column, and a metal contact block which is used for connecting the other ends of two ground wires and is tightly attached to the bottom surface of the metal column during welding to conduct the ground wire or is separated from the metal column during welding stopping is fixed at the free end of a fourth piston rod of the automatic ground wire on-off cylinder.

9. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 1, characterized in that: the automatic lifting device comprises a fourth lifting cylinder which is arranged on the rack below the automatic unloading station and electrically connected with the control system, and the free end of a fifth piston rod of the fourth lifting cylinder is provided with a first through hole and a second through hole which are used for penetrating through the through hole of the rotary platform, then penetrating into the positioning device and jacking two jacking blocks of the horizontal hexagonal column and the horizontal circular tube; the automatic discharging device comprises an inner and outer moving mechanism, an up-down moving mechanism and two second clamping jaws, wherein the inner and outer moving mechanism and the up-down moving mechanism are arranged on the rack and electrically connected with the control system, the two second clamping jaws are arranged on the up-down moving mechanism and used for grabbing the hollow hexagonal shaft and the hollow hexagonal shaft in the cam after the two times of welding.

10. The automatic welding equipment of hollow hexagonal shaft and cam according to claim 1, characterized in that: the positioning device is also correspondingly provided with a sensor for detecting whether the positioning device is provided with an automatic detection station for detecting the hollow hexagonal shaft and the cam to be welded, and the manual feeding station, the automatic detection station, the first automatic welding station, the second automatic welding station and the automatic discharging station are uniformly arranged in a clockwise sequence along the circumference of the rotary platform.

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