Two gantry lifting turnover machine
Technical field
The utility model relates to a kind of welding displacement equipment, especially two gantry lifting turnover machine.
Background technology
For improving the quality of products, boost productivity and lowering welder's labour intensity, in the manufacturing industry such as engineering machinery, railway, bridge, metal structure, the application of welding robot and supporting welding displacement equipment thereof is more and more.Wherein, for the welding of large scale (length and width) workpiece, need welding displacement equipment proper transformation position that workpiece is adjusted to the optimum position and weld.For example, the jib of cement pump truck (shown in Figure 8), general size reaches tens meters, and weight is in ton; For guaranteeing welding quality and welding job efficient, need displacement equipment to coordinate the welding of welding robot to require accurate displacement.Therefore, for the welding of large-size workpiece, how to design that a kind of to coordinate the weldment displacement equipment of robot welding be the problem that those skilled in the art are badly in need of solving.
The utility model content
The purpose of this utility model is to provide a kind of displacement equipment of supporting welding robot, and this equipment should be able to be realized the position adjustment of large-size workpiece, has Stability Analysis of Structures, span is large, floor space is little and easy to operate characteristics.
The technical scheme that the utility model provides is: two gantry lifting turnover machine comprises two portal frames that are arranged in opposite directions and over the ground welding post two ends and is arranged on control cabinet on portal frame; It is characterized in that arranging respectively on two portal frames and one praise clamping tooling and the hoisting mechanism that orders about this frock vertical motion that fixation workpiece uses, drive the switching mechanism that aforementioned frock rotates around horizontal axis and the balance weight mechanism that is used for the aforementioned frock weight of balance.
Described hoisting mechanism comprises the slide rail that vertically is arranged on portal frame, the riser that can slide along slide rail and orders about that riser moves up and down and by the screw mechanism of driven by motor.
Riser in two hoisting mechanisms in opposite directions and right; Each connects the two ends of described clamping tooling with a riser, with the purpose that realizes being praised.
Described balance weight mechanism comprises balancing weight, be rotatably positioned the sprocket wheel on portal frame and coordinate with sprocket wheel and two ends are connected respectively the chain of riser and balancing weight.
Described switching mechanism comprise be fixed on riser and by motor-driven reductor, by one around the outer ring that horizontal axis rotates support be rotatably positioned on riser and be used for connecting the finger plate of clamping tooling and be arranged on finger plate and reductor between the gear pair that rotates to order about finger plate.
Described gear pair comprises the outer ring that is fixed on the gear on speed reducer output shaft and is arranged on the finger plate outer circumference surface and coordinates with aforesaid gears.
Described welding post is equipped with the ground rail for transmitting workpiece; This ground rail extends to adjacent stations after the line of centres of two portal frames passes through respectively two portal frames.
Workflow of the present utility model is: switching mechanism turns over clamping tooling 8 to level, workpiece conveying equipment 10 arrives welding post predeterminated position (position between two portal frames) with certain speed from a upper station delivery workpiece to be welded, elevating mechanism again clamping tooling is down to preset height again with workpiece conveying equipment handing-over workpiece (workpiece is fixed on clamping tooling), then by elevating mechanism and the switching mechanism coordinated movement of various economic factors, workpiece movable to suitable position to be welded is supplied the robot automatic welding; After completing weld job, two gantry lifting turnover machine again with work delivery to the workpiece conveying equipment, then rise to preset height; Next welding post delivered to workpiece by the workpiece conveying equipment.
The beneficial effects of the utility model are: because the equipment that provides has high-precision lifting and flip-flop movement, can realize higher in-placing precision, satisfy the robot welding demand fully; Conveying equipment delivery workpiece passes through in the middle of the portal frame of two gantry lifting turnover machine, can effectively reduce the production line floor space; Compare with common positioner have Stability Analysis of Structures, span is large, easy to operate, loading and unloading convenient, adapt to the advantages such as many various workpieces.In addition, the transmission of accurate turbine and worm decelerator is all adopted in worktable lifting and upset, has auto-lock function; Be applicable to the displacement that length dimension changes Big Gold metal elements greatly.
The utility model can be used for welding in flexible production line, and the workpiece displacement when realizing the arc welding robot welding also can be used for the workpiece displacement in individual machine people welding workstation; Adopt variable-frequency motor as the motor in equipment, realize speed governing by frequency converter, the workpiece displacement when can be used for manually welding.
Description of drawings
Fig. 1 is perspective view of the present utility model.
Fig. 2 is the left TV structure schematic diagram of the hoisting mechanism in the utility model.
Fig. 3 is the perspective view of the hoisting mechanism in the utility model.
Fig. 4 is the main TV structure schematic diagram of the switching mechanism in the utility model.
Fig. 5 is the plan structure schematic diagram of the switching mechanism in the utility model.
Fig. 6 is the S section structure for amplifying schematic diagram in Fig. 5.
Fig. 7 is the main TV structure schematic diagram of the balance weight mechanism in the utility model.
Fig. 8 is the perspective view of cantilever crane of cement pump truck.
The specific embodiment
With reference to the accompanying drawings 1, the specific embodiment of the present utility model is described in further detail.
With reference to Fig. 1, two gantry lifting turnover machine comprises: concrete foundation 1, installation adjustable plate 2, portal frame 3, maintenance cat ladder 4, hoisting mechanism 5, balance weight mechanism 6, safety barrier 7, clamping tooling 8, workpiece (cantilever crane of cement pump truck) 9, workpiece conveying equipment 10, control cabinet 11, switching mechanism 12.
Two portal frames 3 are arranged on welding post two ends in opposite directions and over the ground, thus can be in pairs supporting, jointly praise a clamping tooling 8; The two ends of clamping tooling be connected with hoisting mechanism 5 on two portal frames respectively (should use corresponding clamping tooling for different length, the width of workpiece).Two similar two legs of column A6(of each portal frame) divide both sides across the ground rail; The ground rail 13 that is used for transmitting workpiece is laid on the central authorities of two columns (visible two the ground rails of figure are laid in rail hole, ground), and this ground rail extends to adjacent stations after passing through respectively two portal frames along the line of centres of two portal frames.Workpiece conveying equipment 10 moves along the ground rail, successively workpiece is delivered to adjacent station, processes by setup program.
In described hoisting mechanism (referring to Fig. 2, Fig. 3), slide rail A4 vertically is arranged on the column A6 of portal frame upper (portal frame both sides respectively configure a slide rail), riser A5 is positioned on slide rail slidably by corresponding slide block A5-1, by the preferred servomotor of motor A1() the screw mechanism A2 that drives orders about riser and moves up and down along slide rail.In Fig. 3 as seen: the lower end of leading screw A7 is connected with check plate A9 on Connection Block A10 by bearing pin A8; Motor orders about screw (in figure, screw omits) and rotates, and screw mandrel is just vertically driven, and riser namely is being driven and is moving up and down.
Also be installed with on the riser of hoisting mechanism and order about the switching mechanism that clamping tooling rotates around horizontal axis; In this switching mechanism (referring to Fig. 4, Fig. 5, Fig. 6): the reductor B2 that is driven by motor B1 is fixed on riser A5, and the pivot center of reductor is vertical with riser plate face; The finger plate B9 that be used for to connect clamping tooling is rotatably positioned on riser, (finger plate B9 adopts screw to be fixed in the supporting of outer ring around the outer ring supporting B7 that horizontal axis rotates by one; Clamping tooling is fixed on finger plate by shop bolt and attachment bolt again).The similar bearing of structure of this outer ring supporting: inner ring B7-2 is fixed on riser, the inner peripheral surface of the excircle of inner ring and outer ring B7-1 is manufactured with respectively the raceway that rolls for steel ball, a plurality of steel balls embed in the raceway of inner ring and outer ring simultaneously, make the outer ring keep rotary state flexibly together with finger plate.
The gear pair of transferring power also is installed, to realize the rotation of finger plate between finger plate and reductor.Described gear pair comprises the gear B 10 that is fixed on speed reducer output shaft B3 and is produced on the engaging tooth (outer ring is gear ring) that outer ring B7-1 is upper and coordinate with aforesaid gears.For guaranteeing transmission accuracy, power transmission shaft also adopts bearing 10-1 to position (as the aiding support point), to improve the transmission shaft rigidity.
In two hoisting mechanisms, the mutual cooperation of the motor driven systems of switching mechanism realizes the steady upset of clamping tooling 8 jointly.
Described balance weight mechanism for the aforementioned frock weight of balance (shown in Figure 7), two sprocket wheel C5 are installed in rotation on column by chain pulley seat C6; The chain C4 that coordinates with sprocket wheel is across on column, and the two ends of chain connect respectively riser and balancing weight C2(balancing weight is hidden in the case beam of column); This balance weight mechanism can significantly reduce the load of hoisting mechanism take portal frame as supporting is connected with hoisting mechanism.
In addition, electric installation B8 is located at the centre of gyration place of switching mechanism, forms welding circuit with the source of welding current; Motor in hoisting mechanism and switching mechanism all adopts the larger servomotor of output torque, has shortened driving-chain, improves transmission accuracy, can realize stepless speed regulation and higher in-placing precision.
The utility model is applicable to the displacement that length dimension changes Big Gold metal elements greatly; In the welding flexible production line for the Big Gold metal elements, the utility model and conveying equipment, welding tooling fixture, the robot positioner forms robot ancillary equipment can be according to the robot welding needs, shift one's position in good time and avoid weldment and welding gun recurring structure to interfere, and weld seam is adjusted to the optimum positions such as level, ship type and welded; When improving weldquality, productivity ratio, will weld the employee and free from harmful, dullness, hard work environment; The manufacturing desirable welding equipments such as engineering machinery, railway, bridge, metal structure.