Heating process before rolling of automobile plate spring
Technical Field
The invention relates to a heating process before rolling of an automobile plate spring, and belongs to the technical field of plate spring rolling.
Background
The heating before rolling of the short cone of the plate spring is carried out manually and put into an intermediate frequency heating furnace for heating, a process method does not exist, a through furnace mouth is arranged on the intermediate frequency heating furnace, the plate spring is manually put on a fixed supporting bracket, and the heating end of the plate spring extends into a furnace body for heating. After being heated to the required temperature, the steel is manually carried and put into a short cone rolling mill for rolling. The length of the plate spring and the length of the plate spring are controlled by the experience and proficiency of the operator. The operating personnel is continuous to carry the leaf spring, and working strength is too big. And the temperature stability of the leaf spring also varies from operator to operator.
Disclosure of Invention
The invention provides a heating process before rolling of an automobile plate spring, which solves the problems that the heating of the plate spring is carried out manually at present, the working strength is high, the efficiency is low, the heating length and the heating duration of the plate spring are controlled by the experience and the proficiency of operators, and the temperature stability of the plate spring is changed according to different operators.
The invention relates to a heating process before rolling an automobile plate spring, which comprises the following steps: step one, the plate spring in the previous process is conveyed to a material stopping position of a stepping feeder, step two, the plate spring is placed in a supporting groove of a supporting plate at the front end of the stepping feeder, one end, close to an intermediate frequency heating furnace, of the plate spring extends out of the supporting plate for a fixed length when the plate spring is discharged, the extending length of the plate spring with the same specification is the same, the required extending length can be adjusted through the rolling length of a rolling mill, the length is larger than the required rolling length of the plate spring, step three, a servo motor is moved to drive the intermediate frequency heating furnace to retreat, the heating end of the plate spring leaves a furnace mouth of the intermediate frequency heating furnace, step four, a servo vertical lifting device drives a supporting plate to lift up and separate from the supporting plate, then a servo horizontal stepping device drives the plate spring to move forward for one process step, then the servo vertical lifting device drives the supporting plate to descend, the plate spring falls into a supporting groove of the next process, and step five, the servo motor is moved to drive the intermediate frequency heating furnace to move forward, and step six, repeating the step three to the step five until the plate spring is conveyed to the tail end of the stepping feeder to wait for entering the next working procedure. The working frequency of the rolling mill can be adapted by setting each process interval, the heating time can be fixed, and the heating length is more uniform.
And in the second step, the plate spring is obliquely arranged in a supporting groove of the stepping feeder, so that the plate spring can be supported in the supporting groove by one side surface and one bottom surface, the furnace mouth of the intermediate frequency heating furnace in the third step is also obliquely arranged, and the inclination angle of the furnace mouth is equal to that of the plate spring.
Step-by-step feeder includes the pay-off frame, be fixed with along its width direction in the pay-off frame and be no less than two backup pads, the backup pad is equipped with the support groove of the L type that the multiunit slope set up along its length direction, the holding surface that corresponds around every group supports the groove is on the coplanar, be equipped with the support frame between the adjacent backup pad, the support frame top is equipped with the layer board of the L type that the multiunit slope set up along its length direction, the holding surface that corresponds around every group layer board is on the coplanar, the inclination of layer board equals with the inclination that supports the groove, the bottom of support frame is connected with servo horizontal stepper and servo vertical elevating gear.
Preferably, a mounting plate is fixed below each supporting plate, and the mounting plate is fixed on the supporting frame through bolts. Individual replacement may be performed.
Preferably, the below of layer board is equipped with the triangle piece, and the triangle piece is fixed on the mounting panel, and the triangle piece is equipped with the inclined plane parallel with layer board left surface, and layer board left surface is fixed on the inclined plane. The installation and the positioning are more convenient and simpler.
Preferably, the servo vertical lifting device comprises a vertical servo motor fixed on the feeding rack, the vertical servo motor is connected with a first screw rod, the first screw rod is sleeved with a first nut, the first nut is fixedly connected with a support plate, the top of the support plate is connected with the support frame through a connecting frame, a vertically arranged first guide rail is fixed on the feeding rack, and a first sliding block fixed with the support plate is arranged on the first guide rail. The guide rail supports are arranged on two sides, so that the sliding is more stable, and the feeding is more accurate through servo control.
Preferably, the servo horizontal stepping device comprises a horizontal servo motor fixed on the support plate, the horizontal servo motor is connected with a second screw rod, the second screw rod is connected with a second nut, a sliding plate is fixed on the second nut, a second guide rail is arranged on the support plate along the horizontal direction, a second sliding block fixed with the sliding plate is arranged on the second guide rail, and the connecting frame is fixed at the top of the sliding plate. The horizontal movement is provided with the guide rail, so that the sliding is more stable, and the stepping feeding is controlled by the servo control to be more accurate.
Preferably, intermediate frequency furnace mobile device includes the chassis, is equipped with guide rail three along the fore-and-aft direction on the chassis, is equipped with slider two on the guide rail three, and the top of slider three is fixed with the mounting bracket, and the mounting bracket top is fixed with the intermediate frequency heating furnace, is equipped with a plurality of furnace mouths that correspond with the support groove and that inclination equals on the preceding terminal surface of intermediate frequency heating furnace, and the bottom of mounting bracket is fixed with nut three, and three endotheca of nut have lead screw three, and lead screw three rotates and installs on the chassis, and lead screw three rear ends is fixed with removal servo motor. The intermediate frequency heating furnace can be close to the stepper and make the plate spring insert the heating import, conveniently heats, and feeds through servo control, and is more accurate.
Preferably, the inclination angles of the supporting groove, the supporting plate and the furnace mouth are 30 degrees with the horizontal plane. The support is more stable, prevents that the leaf spring from removing.
Preferably, the bottom corners of the supporting grooves are provided with two supporting table surfaces which are perpendicular to each other, the supporting table surfaces enable the installation to be more convenient and faster, and the two supporting table surfaces are provided with wear-resistant supporting blocks which are perpendicular to each other in a supporting and positioning mode. And the wear-resistant rubber can be replaced independently, so that the cost is saved.
Preferably, the bottom of pay-off frame is fixed with the fixed plate, installs the locking bolt on the fixed plate, still includes the PLC controller, and the PLC controller is connected and is removed servo motor, horizontal servo motor and vertical servo motor. The control is more accurate.
Preferably, the vertical servo motor is connected with a speed reducer fixed with the feeding rack, the speed reducer is connected with a first lead screw, the lower end of the lead screw is rotatably installed on a connecting plate, and the connecting plate is fixed on the feeding rack.
The invention has the following beneficial effects:
1. the servo automatic feeding heating replaces the manual work, and the labor cost is reduced.
2. The stability and the efficiency of leaf spring heating temperature have been improved.
3. The accuracy of the required heating length of the plate spring is improved.
4. The plate spring and the horizontal plane form a certain angle, and in the process of stepping conveying and heating of the plate spring, a side plane and a bottom plane of the plate spring are always in contact with the stepping feeding frame, so that the position precision of the plate spring in the conveying process is ensured, and the possibility that the plate spring drops is avoided.
Drawings
FIG. 1 is a schematic view of a combined three-dimensional structure of a step feeder and an intermediate frequency furnace moving device according to the present invention;
fig. 2 is a schematic three-dimensional structure diagram of a step feeder position 1 according to the present invention;
FIG. 3 is a schematic front view of the moving device of the intermediate frequency furnace of the present invention;
FIG. 4 is a schematic diagram of a right-side view structure of a moving device of the intermediate frequency furnace;
fig. 5 is a schematic three-dimensional structure diagram of the step feeder position 2 according to the present invention;
FIG. 6 is an enlarged schematic view of the structure at A in FIG. 5;
in the figure: 1. the device comprises a supporting plate, 2, a supporting frame, 3, a supporting plate, 4, a wear-resistant supporting block, 5, a supporting groove, 6, a connecting frame, 7, a sliding plate, 8, a plate spring, 9, a feeding rack, 10, a horizontal servo motor, 11, a fixing plate, 12, a first screw rod, 13, a connecting plate, 14, a second guide rail, 15, a first nut, 16, a vertical servo motor, 17, a second nut, 18, a supporting plate, 19, a first guide rail, 20, a mounting plate, 21, a second screw rod, 22, a triangular block, 23, a bottom frame, 24, a furnace mouth, 25, a medium-frequency heating furnace, 26, a mounting frame, 27, a third sliding block, 28, a third guide rail, 29, a third nut, 30, a third screw rod.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1 to 6, the invention relates to a heating process before rolling of an automobile plate spring, which comprises the following steps: step one, the plate spring 8 in the previous step is conveyed to a material stopping position of a stepping feeder, step two, the plate spring 8 is placed in a supporting groove 5 of a supporting plate 3 at the front end of the stepping feeder, one end, close to an intermediate frequency heating furnace 25, of the plate spring 8 extends out of the supporting plate 3 for a fixed length when the material is placed, the length is larger than the length required by rolling of the plate spring 8, step three, a servo motor 31 is moved to drive the intermediate frequency heating furnace 25 to retreat, so that the heating end of the plate spring 8 leaves a furnace mouth 24 of the intermediate frequency heating furnace 25, step four, a servo vertical lifting device drives a supporting plate 1 to lift up along with the plate spring and separate from the supporting plate 3, then a servo horizontal stepping device drives the plate spring 8 to advance for one step, then the servo vertical lifting device drives the supporting plate 1 to descend, the plate spring 8 falls into the intermediate frequency supporting groove 5 in the next step, and step five, the servo motor 31 is moved to drive the heating furnace 25 to advance, so that the heating end of the plate spring 8 enters the intermediate frequency heating furnace mouth 25 for heating, and step six, repeating the step three to the step five until the plate spring 8 is conveyed to the tail end of the stepping feeder to wait for entering the next working procedure.
In the second step, the plate spring 8 is obliquely arranged in the supporting groove 5 of the stepping feeder, so that the plate spring 8 can be supported in the supporting groove 5 by one side surface and one bottom surface, and the furnace mouth 24 of the intermediate-frequency heating furnace 25 in the third step is also obliquely arranged, and the inclination angle of the plate spring is equal to that of the plate spring 8.
Step-by-step feeder includes pay-off frame 9, it is no less than two backup pads 3 to be fixed with on its width direction on the pay-off frame 9, backup pad 3 is equipped with the support groove 5 of the L type that the multiunit slope set up on its length direction, the holding surface that corresponds around every group support groove 5 is on the coplanar, be equipped with support frame 2 between the adjacent backup pad 3, 2 tops of support frame are equipped with the layer board 1 of the L type that the multiunit slope set up along its length direction, the holding surface that corresponds around every group layer board 1 is on the coplanar, the inclination of layer board 1 equals with the inclination that supports groove 5, the bottom of support frame 2 is connected with servo horizontal stepper and servo vertical elevating gear.
And a mounting plate 20 is fixed below each supporting plate 1, and the mounting plate 20 is fixed on the supporting frame 2 through bolts.
The supporting plate is characterized in that a triangular block 22 is arranged below the supporting plate 1, the triangular block 22 is fixed on the mounting plate 20, the triangular block 22 is provided with an inclined plane parallel to the left side face of the supporting plate 1, and the left side face of the supporting plate 1 is fixed on the inclined plane.
The servo vertical lifting device comprises a vertical servo motor 16 fixed on the feeding rack 9, the vertical servo motor 16 is connected with a first lead screw 12, the first lead screw 12 is sleeved with a first nut 15, the first nut 15 is fixedly connected with a support plate 18, the top of the support plate 18 is connected with the support frame 2 through a connecting frame 6, a first vertically-arranged guide rail 19 is fixed on the feeding rack 9, and a first sliding block fixed with the support plate 18 is arranged on the first guide rail 19.
The servo horizontal stepping device comprises a horizontal servo motor 10 fixed on a support plate 18, the horizontal servo motor 10 is connected with a second lead screw 21, the second lead screw 21 is connected with a second nut 17, a sliding plate 7 is fixed on the second nut 17, a second guide rail 14 is arranged on the support plate 18 along the horizontal direction, a second sliding block fixed with the sliding plate 7 is arranged on the second guide rail 14, and a connecting frame 6 is fixed at the top of the sliding plate 7.
Intermediate frequency furnace mobile device includes chassis 23, be equipped with guide rail three 28 along the fore-and-aft direction on chassis 23, be equipped with slider two on the guide rail three 28, the top of slider three 27 is fixed with mounting bracket 26, mounting bracket 26 top is fixed with intermediate frequency heating furnace 25, be equipped with a plurality ofly on intermediate frequency heating furnace 25's the preceding terminal surface and support the furnace mouth 24 that groove 5 corresponds and inclination equals, mounting bracket 26's bottom is fixed with nut three 29, nut three 29 endotheca has lead screw three 30, lead screw three 30 rotates and installs on chassis 23, lead screw three 30 rear end is fixed with removal servo motor 31.
The inclination angles of the supporting groove 5, the supporting plate 1 and the furnace mouth 24 are 30 degrees with the horizontal plane.
Two mutually perpendicular supporting table surfaces are arranged at the bottom corners of the supporting grooves 5, and mutually perpendicular wear-resistant supporting blocks 4 are supported and positioned on the two supporting table surfaces.
The bottom of pay-off frame 9 is fixed with fixed plate 11, installs the locking bolt on the fixed plate 11, still includes the PLC controller, and the PLC controller is connected and is removed servo motor 31, horizontal servo motor 10 and vertical servo motor 16.
The vertical servo motor 16 is connected with a speed reducer fixed with the feeding rack 9, the speed reducer is connected with a first lead screw 12, the lower end of the first lead screw 12 is rotatably installed on a connecting plate 13, and the connecting plate 13 is fixed on the feeding rack 9.
The invention consists of a servo stepping conveyor and an intermediate frequency heating furnace 25 which can be controlled to move by a servo motor. The plate spring 8 and the horizontal plane form an angle of 30 degrees and are placed on the stepping feeder, so that one plane and one vertical plane of the plate spring 8 are in supporting contact with the feeder. The servo motor controls the feeder to move up and down, and the servo motor controls the horizontal displacement of the feeder to realize stepping feeding.
The furnace mouth 24 of the intermediate frequency heating furnace 25 is consistent with the plate spring 8 and forms an angle of 30 degrees with the horizontal plane. In the feeding process of the stepping feeder, the intermediate frequency heating furnace 25 is far away from the feeder, and after the stepping action is finished, the intermediate frequency heating furnace 25 is close to the feeder, so that the heating position required by the plate spring 8 enters the furnace body for heating. The heating furnace controls displacement through a servo motor, and the heating length of the plate spring is adjusted.
Step feeding action principle: the leaf spring 8 is placed on the support plate at an angle of 30 deg. to the horizontal with the heated end of the leaf spring 8 extending out of the support slot 5. The vertical servo motor 16 controls the support frame 2 to ascend, the plate spring 8 is lifted from the support plate 3, the horizontal servo motor 10 controls the support frame 2 to horizontally move to convey the plate spring 8 to the position above the next support groove 5 of the support plate 3, the vertical servo motor 16 controls the support frame 3 to descend, the plate spring 8 is placed on the wear-resistant support block 4 on the support groove 5, and then the horizontal servo motor 10 moves the support frame 2 to the position shown in the figure 2 to wait for the start of the next stepping action.
The wear-resisting supporting shoe angular position on 25 fire door 24 of intermediate frequency heating furnace and the backup pad 3 is unanimous, can be close to and keep away from step feeder through removing servo motor 31, and step feeder carries out the pay-off before, and step feeder is kept away from to intermediate frequency heating furnace 25, makes the leaf spring 8 of heating leave fire door 24 completely after, carries out step feed again. After the feeding is finished, the intermediate frequency heating furnace 25 moves the servo motor 31 to enable the heating end of the plate spring 8 to extend into the furnace body from the furnace mouth 24 for heating.
In conclusion, the servo control replaces the manual work, and the labor cost is reduced. The stability and the efficiency of leaf spring heating temperature have been improved. The accuracy of the required heating length of the plate spring is improved. The plate spring and the horizontal plane form a certain angle, and in the process of stepping conveying and heating of the plate spring, a side plane and a bottom plane of the plate spring are always in contact with the stepping feeding frame, so that the position precision of the plate spring in the conveying process is ensured, and the possibility that the plate spring drops is avoided.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.