Servo drive pressing device
Technical Field
The invention relates to a servo drive pressing device, and belongs to the field of pressing equipment.
Background
The pressing equipment is divided into four types of pressing dies, robot roller edge pressing, simple pressing and special pressing machines.
In the door line project, when customers require the special pressing machine to be developed and manufactured abroad, domestic manufacturers have no qualification.
The forming processes of the special press-fit machine and the press-fit die belong to equipment for simultaneous forming in a large range of a circumference, and the special press-fit machine and the press-fit die are characterized by fast production takt, good quality stability and relatively poor flexibility, and are more suitable for mass production of more than 10 thousands of annual products; the robot roller edge pressing belongs to equipment of local gradual forming, has the characteristics of high flexibility, low production takt and high quality stability, and is more suitable for medium and small batch production with annual output of less than 10 thousands of vehicles.
The pressing strength of the special pressing machine is superior to that of a roller edge. The special press-fit machine is formed by a profile-to-profile mode, and the final press section of the roller edge is a straight line-to-curve mode, so that the larger the flanging height from the mechanism, the more the flanging height is, the less the pressing is. In addition, the forming process of the roller edge is easier to generate wave defects. According to the reasons, the special press-fit machine meets the requirement of pursuing high quality of products. The beat of the special press-fit machine is much higher than the edge of the robot roller and is close to the press-fit die. Time is money, and the requirement of high efficiency is met. The pressing action is self servo-driven, and the pressing times, the action stroke and the like can be set according to the molding requirement of the workpiece. The design of the die is more flexible than that of a pressing die, and 3 times of pressing can be realized. The pressing die needs to be installed on edge covering equipment for use, and the pressing special machine completes all pressing functions for the pressing special machine.
Based on the advantages of the special laminating machine, the applicant newly develops the special laminating machine in order to fill the gap in the field of laminating equipment. The core of the special press-fit machine is the generation mode of a power source for press-fit action, which is generally two modes of oil pressure and servo drive. Wherein, the oil pressure mode is easy to leak oil, and servo drive is more liked by the user. Therefore, there is an urgent need to develop a servo driving pressing device to solve the problem of power source of the newly developed special pressing machine, so that the power source of the servo driving pressing device can be shared by the special pressing machines of the front door, the rear door, the hair cover, the trunk and the back door. If the vehicle model is replaced, the vehicle model can still be repeatedly used.
Disclosure of Invention
The invention aims to provide a servo drive pressing device to solve the problem of a power source in the pressing process of a newly developed special pressing machine.
The technical scheme of the invention is realized as follows:
the servo driving pressing device is characterized by comprising a mounting seat with a U-shaped groove structure, wherein a servo motor is fixedly arranged at the left end of the mounting seat through a vertically fixed casting structure, a bidirectional ball screw nut pair is arranged in the mounting seat, the left end of a screw rod in the bidirectional ball screw nut pair is fixedly connected with an output shaft of the servo motor, the rotating directions of a thread at the left section of the screw rod in the bidirectional ball screw nut pair and a thread at the right section of the screw rod are opposite, when the screw rod rotates, two nuts in the bidirectional ball screw nut pair are separated towards the left side and the right side or close towards the middle, two nuts in the bidirectional ball screw nut pair are both fixedly connected with a cam slider, and the cam slider at the left side and the cam slider at the right side are oppositely arranged;
a slide block is arranged above the cam slide block on the left side and the cam slide block on the right side, a longitudinal guide mechanism is arranged between the middle part of the front side of the slide block and the installation seat and between the middle part of the rear side of the slide block and the installation seat, the slide block is arranged between the two longitudinal guide mechanisms and is connected with the two longitudinal guide mechanisms, so that the slide block can move up and down between the two longitudinal guide mechanisms, the left half part of the slide block and the right half part of the slide block are symmetrical, the left half part of the slide block and the right half part of the slide block are respectively provided with two inclined planes which are distributed in a stepped manner and arranged downwards and are respectively a final-pressure fit inclined plane and a pre-pressure fit inclined plane, and the pre-pressure fit inclined plane;
the left half part of the sliding block and the right half part of the sliding block are respectively provided with a sliding block shaft hole, the two sliding block shaft holes are arranged in bilateral symmetry, a shaft is arranged in each sliding block shaft hole, the two ends of each shaft extend out of the front side surface and the rear side surface of the sliding block, the part of each shaft extending out of the front side surface of the sliding block and the part of each shaft extending out of the rear side surface of the sliding block are respectively provided with a supporting roller capable of rotating on the shaft, the cam sliding block on the left side and the cam sliding block on the right side have the same structure and respectively comprise a cam sliding block inclined plane matched with a pre-pressing fit inclined plane and a final pressing fit inclined plane, the inclined planes of the cam sliding block, the pre-pressing fit inclined plane and the final pressing fit inclined plane are respectively the same, the front side and the rear side of the cam sliding block inclined plane are symmetrically provided with curve cams protruding upwards, the top of, the three curved cam inclined planes are a curved cam first inclined plane, a curved cam second inclined plane and a curved cam third inclined plane in sequence from top to bottom, the curved cam arc surface is positioned below the curved cam third inclined plane, a weighing sensor is arranged at the center of the upper surface of the top of the sliding block, and the upper surfaces of the left half part and the right half part of the sliding block are provided with two grooves which are symmetrically arranged front and back;
the front side surface of the left cam slider is provided with a first collision block, the rear side surface of the left cam slider is provided with a second collision block, the front edge of the left part of the longitudinal guide mechanism of the installation seat is provided with a first travel switch capable of contacting with the first collision block, the rear edge of the left part of the longitudinal guide mechanism of the installation seat is provided with a second travel switch capable of contacting with the second collision block, when the left cam slider is positioned at a left side safety position, the second collision block contacts with a contact of the second travel switch, and when the left cam slider is positioned at a right side safety position, the first collision block contacts with a contact of the first travel switch.
The further technical scheme comprises the following steps:
the longitudinal guide mechanism comprises a V-shaped concave guide plate and a V-shaped convex guide rod, the V-shaped concave guide plate is longitudinally arranged and fixedly connected to the middle part of the front side of the sliding block or the middle part of the rear side of the sliding block, a V-shaped concave guide plate groove with an outward opening in a cross section is longitudinally arranged on the V-shaped concave guide plate, a groove guide plate is arranged on each of two inclined planes of the V-shaped concave guide plate groove, the sliding guide surfaces of the V-shaped convex guide rod are two inclined planes arranged in a V shape, the V-shaped convex guide rod is fixedly arranged at the middle part of the front side of the mounting seat or the middle part of the rear side of the mounting seat, the sliding guide surface of the V-shaped convex guide rod is embedded into the V-shaped concave guide plate groove of the V-shaped concave guide plate, the two inclined planes of the sliding guide surface of the V-shaped convex guide rod are respectively attached to the groove guide plate in the V-shaped concave guide plate groove.
The lower surface of the weighing sensor is fixedly connected with the upper surface of the sliding block through a positioning pin.
The pre-pressing fit inclined plane is fixedly provided with a pre-pressing guide plate, and the final-pressing fit inclined plane is fixedly provided with a final-pressing guide plate.
An outer reference limiting block used for limiting the left limit position of the left cam slider is arranged on the left side of the mounting seat, an outer reference limiting block used for limiting the right limit position of the right cam slider is arranged on the right side of the mounting seat, a horizontal guide plate is arranged on the upper surface of the mounting seat, vertical guide plates are arranged on the inner surface of the front wall and the inner surface of the rear wall of the mounting seat, two horizontal guide plate grooves are symmetrically arranged on the horizontal guide plate in the front-back direction, two inner reference limiting blocks which are higher than the upper surface of the horizontal guide plate and used for limiting the right limit position of the left cam slider and the left limit position of the right cam slider are fixedly arranged at the positions, between the two longitudinal guide mechanisms, of the middle parts, and the vertical surface of the inner side of the cam sliding block on the left side and the vertical surface of the inner side of the cam sliding block on the right side are respectively provided with two bosses which are matched with the convex parts of the inner reference limiting blocks in an impacting manner.
The installation seat is fixedly connected with a first cover plate extending inwards through bolts on the upper surface of the front wall and the upper surface of the rear wall of the left part of the longitudinal guide mechanism, the installation seat is fixedly connected with a second cover plate extending inwards through bolts on the upper surface of the front wall and the upper surface of the rear wall of the right part of the longitudinal guide mechanism, the front side surface of the left cam slider is provided with a cam slider front socket, the rear side surface of the left cam slider is provided with a cam slider rear socket, the first collision block is installed in the cam slider front socket, the second collision block is installed in the cam slider rear socket, the first travel switch is arranged on the first cover plate on the front edge of the left part of the installation seat, and the second travel switch is arranged on the first cover plate on the rear edge of the left part of the installation seat.
Two nuts in the bidirectional ball screw nut pair are both in end flange structures, the upper part of the flange is processed into a plane and is provided with a through threaded oil filling hole for filling oil to the screw, and the joint type pressure filling oil cup is arranged on the nut and is communicated with the threaded oil filling hole on the nut.
The middle part of the area where the shaft is matched with the supporting type roller is provided with a through oil groove which is radially arranged, the two ends of the shaft are provided with oil holes which are communicated with the oil groove of the shaft, the two ends of the shaft are provided with a straight-through type pressure injection oil cup which is communicated with the oil holes of the shaft, the two ends of the shaft are both provided with thin nuts, a second gasket is arranged between the thin nuts and the supporting type roller, and a first gasket is arranged between the supporting type roller and the front side surface or the rear side surface of the sliding block.
The inclination of the cam slider inclined plane, the pre-pressing fit inclined plane and the final-pressing fit inclined plane are all 30 degrees.
A top is opened there is the window, the open hollow main backplate in bottom passes through the screw connection to the mount pad on, two top backplate are connected to the slider pressfitting face at slider top through the layering respectively on, and two top backplate cover the window at main backplate top, and the recess of half upper surface on the left side of slider and the recess of half upper surface on the right side of slider are located between two top backplate, and four angles of mount pad lower surface respectively are provided with a bolt type gyro wheel.
Compared with the prior art, the invention has the beneficial effects that:
the servo drive pressing device disclosed by the invention can meet different position requirements of upward movement of the female die through flexible drive of the servo motor according to the pressing process requirements of products, so that repeated flanging can be completed, and pressing is realized. The weighing sensor can feed back the state of the pressing force at different positions of the control system in time.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of an external configuration of a servo drive bonding apparatus according to the present invention;
FIG. 2 is a schematic view of the interior of the servo driven lamination apparatus of the present invention with the main guard plate and the top guard plate removed;
FIG. 3 is a top view of a servo driven stitching device according to the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is a sectional view taken along line B-B of FIG. 4;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 4;
FIG. 7 is an enlarged view of a cam curve of a cam slider in a servo driven press according to the present invention;
in the figure: 1. a servo motor, 2, a bidirectional ball screw nut pair, 3, a left cam slide block, 4, a right cam slide block, 5, a mounting seat, 6, a slide block, 7, a weighing sensor, 8, a positioning pin, 9, a final pressure guide plate, 10, a prepressing guide plate, 11, an outer reference limit block, 12, an inner reference limit block, 13, a joint type pressure filling oil cup, 14, a V-shaped convex guide rod, 15, a V-shaped concave guide plate, 16, a groove guide plate, 17.1, a first collision block, 17.2, a second collision block, 18.1, a first travel switch, 18.2, a second travel switch, 19, a first cover plate, 20, a second cover plate, 21, a vertical guide plate, 22, a horizontal guide plate, 23, a shaft, 24, a supporting type roller, 25, a first gasket, 26, a second gasket, 27, a thin nut, 28, a straight-through type pressure filling oil cup, 29, a bolt type roller, 30, a main guard plate, 31, a top guard plate, 32 and a pressure strip, 33. the adjusting shim comprises an adjusting shim, a first slope of the curve cam, b, a second slope of the curve cam, c, a third slope of the curve cam, d and a cambered surface of the curve cam.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the invention provides a servo driving pressing device which comprises a mounting seat 5 with a U-shaped groove structure, wherein a servo motor 1 is fixedly arranged at the left end of the mounting seat 5 through a vertically fixed casting structure, a bidirectional ball screw nut pair 2 is arranged in the mounting seat 5, the left end of a screw rod in the bidirectional ball screw nut pair 2 is fixedly connected with an output shaft of the servo motor 1, the thread turning directions of the left section of the screw rod in the bidirectional ball screw nut pair 2 and the right section of the screw rod are opposite, when the screw rod rotates, two nuts in the bidirectional ball screw nut pair 2 are separated towards the left side and the right side or approach towards the middle, two nuts in the bidirectional ball screw nut pair 2 are fixedly connected with a cam slider, and a cam slider 3 at the left side and a cam slider 4 at the right side are oppositely arranged; two nuts in the two-way ball screw nut pair 2 are both in end flange structures, the upper part of the flange is processed into a plane and is provided with a through threaded oil filling hole for filling oil to the screw, and the joint type pressure filling oil cup 13 is arranged on the nut and is communicated with the threaded oil filling hole on the nut.
A slide block 6 is arranged above the cam slide block 3 on the left side and the cam slide block 4 on the right side, a longitudinal guide mechanism is arranged between the middle part of the front side of the slide block 6 and the installation seat 5 and between the middle part of the rear side of the slide block 6 and the installation seat 5, the slide block 6 is arranged between the two longitudinal guide mechanisms and is connected with the two longitudinal guide mechanisms, so that the slide block 6 can move up and down between the two longitudinal guide mechanisms, the left half part of the slide block 6 and the right half part of the slide block 6 are symmetrical, the left half part of the slide block 6 and the right half part of the slide block 6 are respectively provided with two inclined surfaces which are distributed in a stepped manner and arranged downwards and are respectively a final-pressure fit inclined surface and a pre-pressure fit inclined surface, the pre-pressure fit inclined surface of the left half part of the slide block 6 and the pre-pressure fit inclined surface of the right half part of the slide block;
the left half part of the sliding block 6 and the right half part of the sliding block 6 are respectively provided with a sliding block shaft hole, the two sliding block shaft holes are arranged in a bilateral symmetry mode, a shaft 23 is arranged in each sliding block shaft hole, the two ends of each shaft 23 extend out of the front side surface and the rear side surface of the sliding block 6, a supporting roller 24 capable of rotating on the shaft 23 is arranged at the position of each shaft 23 extending out of the front side surface of the sliding block 6 and the position of each shaft 23 extending out of the rear side surface of the sliding block 6, a through oil groove which is radially arranged is formed in the middle of the area where the shaft 23 is matched with the supporting roller 24, oil holes communicated with the oil groove of the shaft 23 are formed at the two ends of the shaft 23, a through type pressure injection oil cup 28 communicated with the oil hole of the shaft 23 is arranged at the two ends of the shaft 23, a thin nut 27 is arranged at the two ends of the shaft 23, a second gasket 26 is arranged between the. The left cam slide block 3 and the right cam slide block 4 have the same structure and respectively comprise a cam slide block inclined plane matched with a pre-pressing matching inclined plane and a final-pressing matching inclined plane, the inclined planes of the cam slide block, the pre-pressing matching inclined plane and the final-pressing matching inclined plane are all 30 degrees, curve cams protruding upwards are symmetrically arranged on the front side and the rear side of the cam slide block inclined plane, the top of each curve cam is provided with three curve cam inclined planes with different inclined angles and used for being matched with the supporting type roller 24 and a curve cam cambered surface d used for being matched with the supporting type roller 24, the three curve cam inclined planes are a curve cam first inclined plane a, a curve cam second inclined plane b and a curve cam third inclined plane c from top to bottom in sequence, and the curve cam cambered surface d is positioned below the curve cam third inclined plane c, wherein the inclination value of the third inclined surface c of the curved cam is between the inclination value of the first inclined surface a of the curved cam and the inclination value of the second inclined surface b of the curved cam. The center of the upper surface of the sliding block 6 is provided with a weighing sensor 7, and the lower surface of the weighing sensor 7 is fixedly connected with the upper surface of the sliding block 6 through a positioning pin 8. The upper surface of the left half part of the sliding block 6 and the upper surface of the right half part of the sliding block 6 are respectively provided with two grooves which are symmetrically arranged in front and back;
the upper surface of the front wall and the upper surface of the rear wall of the mounting seat 5 at the left side part of the longitudinal guide mechanism are both fixedly connected with a first cover plate 19 which extends inwards through bolts, the upper surface of the front wall and the upper surface of the rear wall of the mounting seat 5 at the right side part of the longitudinal guide mechanism are both fixedly connected with a second cover plate 20 which extends inwards through bolts, the front side surface of the left cam slider 3 is provided with a cam slider front socket, the rear side surface of the left cam slider 3 is provided with a cam slider rear socket, a first collision block 17.1 is installed in the cam slider front socket, a second collision block 17.2 is installed in the cam slider rear socket, a first travel switch 18.1 is arranged on the first cover plate 19 at the front edge of the left side part of the mounting seat 5, and a second travel switch 18.2 is arranged on the first cover plate 19 at the rear edge of the left side part of the mounting seat 5.
When the left-hand cam slider 3 is in the left-hand safety position, the second striker 17.2 contacts the contact of the second travel switch 18.2, and when the left-hand cam slider 3 is in the right-hand safety position, the first striker 17.1 contacts the contact of the first travel switch 18.1. The left side safety position of each cam slide block 3 on the left side and the left side safety position of each cam slide block 4 on the right side are positioned on the left side of the respective leftmost end working position, the right side safety position of each cam slide block 3 on the left side and the right side safety position of each cam slide block 4 on the right side are positioned on the right side of the respective rightmost end working position, and the structure (the first collision block 17.1, the first travel switch 18.1, the second collision block 17.2 and the second travel switch 18.2) is used for sending out an electronic over-position protection signal of the working positions so as to interrupt the continuous rotation of the servo motor and play a role of a safety protection function through an electric. The leftmost end working position of the left cam slide block 3 and the right cam slide block 4 refers to the leftmost end position to which the left cam slide block 3 and the right cam slide block 4 move in the normal pressing process of the servo drive pressing mechanism, the rightmost end working position of the left cam slide block 3 and the right cam slide block 4 refers to the rightmost end position to which the left cam slide block 3 and the right cam slide block 4 move in the normal pressing process of the servo drive pressing mechanism,
the longitudinal guide mechanism comprises a V-shaped concave guide plate 15 and a V-shaped convex guide rod 14, the V-shaped concave guide plate 15 is longitudinally arranged and fixedly connected to the middle of the front side of the sliding block 6 or the middle of the rear side of the sliding block 6, a V-shaped concave guide plate groove with an outward opening in the cross section is longitudinally arranged on the V-shaped concave guide plate 15, a groove guide plate 16 is arranged on each of two inclined surfaces of the V-shaped concave guide plate groove, the sliding guide surface of the V-shaped convex guide rod 14 is two inclined surfaces arranged in a V shape, the V-shaped convex guide rod 14 is fixedly arranged in the middle of the front side of the mounting seat 5 or the middle of the rear side of the mounting seat 5, the sliding guide surface of the V-shaped convex guide rod 14 is embedded into the V-shaped concave guide plate groove of the V-shaped concave guide plate 15, the two inclined surfaces of the sliding guide surface of the V-shaped convex guide rod 14 are respectively attached to the groove guide plate 16 in the V-shaped concave guide plate groove, and an adjusting gasket 33 is arranged.
The left side of mount pad 5 is provided with an outer reference stopper 11 that is used for restricting the left extreme position of left cam slider 3, the right side of mount pad 5 is provided with an outer reference stopper 11 that is used for restricting the right extreme position of right cam slider 4, the upper surface of mount pad 5 is provided with horizontal baffle 22, the antetheca internal surface and the back wall internal surface of mount pad 5 all are provided with vertical baffle 21, horizontal baffle 22 is last around the symmetry be provided with two horizontal baffle recesses, the position that the middle part of two horizontal baffle recesses is located between two vertical guide mechanism is fixed and is provided with two height and is higher than horizontal baffle 22 upper surface and is used for restricting the right extreme position of left cam slider 3 and the left extreme position of right cam slider 4's interior reference stopper 12 of horizontal baffle 22 right side extreme position, all there are two on the vertical face of left cam slider 3 inboard and the vertical face of right cam slider 4 inboard on right side and all have two cam slider 12 The inside vertical face boss of slider. The left limit positions of the left cam slider 3 and the right cam slider 4 are located on the left side of the left safety position, the right limit positions of the left cam slider 3 and the right cam slider 4 are located on the right side of the right safety position, and the structure (the boss of the inner vertical surface of the cam slider, the inner reference limiting block 12 and the outer reference limiting block 11) is used for mechanical over-position protection, so that when an electronic over-position protection signal fails, the continuous rotation of the servo motor 1 causes the separation of a nut pair and a screw rod in a bidirectional ball screw nut pair possibly occurring at the outermost end direction position, so that balls fall off, or the interference of the left cam slider 3 and the right cam slider 4 possibly occurring at the innermost end direction position and the V-shaped concave guide plate 15 is avoided.
A hollow main protection plate 30 with a window at the top and an open bottom is connected to a mounting seat 5 through a screw, two top protection plates 31 are respectively connected to a sliding block pressing surface at the top of a sliding block 6 through pressing strips 32, the two top protection plates 31 cover the window at the top of the main protection plate 30, a groove on the upper surface of the left half part of the sliding block 6 and a groove on the upper surface of the right half part of the sliding block 6 are positioned between the two top protection plates 31, and four corners of the lower surface of the mounting seat 5 are respectively provided with a bolt type roller 29.
The working principle and the working process of the servo driving pressing device provided by the invention are as follows: when the servo motor 1 rotates forwards, the screw rod in the bidirectional ball screw nut pair 2 is driven to rotate, so that the nut in threaded connection with the left section of the screw rod and the nut in threaded connection with the right section of the screw rod are driven to move relatively, the left cam slider 3 and the right cam slider 4 are driven to move relatively, and the cam slider inclined planes of the left cam slider 3 and the right cam slider 4 drive the slider 6 to move upwards together. The cam slider inclined plane of the left cam slider 3 and the cam slider inclined plane of the right cam slider 4 drive the pre-pressing fit inclined plane of the sliders, and the sliders 6 move upwards to achieve pre-pressing fit. Different working strokes are set according to the requirements of the product forming process, and two times of pre-pressing can be realized. After the pre-pressing is finished, the servo motor 1 rotates reversely to drive the left cam slide block 3 and the right cam slide block 4 to move oppositely, after the support type roller 24 is brought into contact with the curved cam first inclined surfaces a (see fig. 7) of the left and right cam sliders 3 and 4, the pre-pressing guide plate 10 of the slide 6 is disengaged from the cam slider inclined surface of the left cam slider 3 and the cam slider inclined surface of the right cam slider 4, when the support type roller 24 travels along the second slope b of the curved cam, the rapid descent of the slider 6 is achieved, when the supporting type roller 24 goes to the third slope c of the curved cam, the descent deceleration of the slider 6 is achieved, when the supporting type roller 24 walks to the curved cam cambered surface d, the supporting mode of the slide block 6, the left cam slide block 3 and the right cam slide block 4 is changed from the roller supporting mode of the supporting type roller 24 to the final press fit inclined surface supporting mode. When the left cam slide block 3 and the right cam slide block 4 move to the final pressure preparation positions in opposite directions, the servo motor 1 rotates in the forward direction, the left cam slide block 3 and the right cam slide block 4 move relatively to drive the final pressure matching inclined plane, and the slide block 6 moves upwards to realize final pressure. When the slide block 6 moves, the weighing sensor 7 moves along with the slide block and feeds back the state of the pressing force at different positions of the control system in due time. According to the pressing process requirement, a complete pressing action is designed, and the position of a sliding block 6 in the servo motor flexible driving pressing device is changed, so that multiple flanging is completed, and pressing is realized.