Automatic press for forming protrusions in tubular part

FIELD: plastic metal working, possibly die tools for forming protrusions in tubular parts in presses provided with systems for automatic feed and discharging parts and for controlling forming process.

SUBSTANCE: automatic press includes press; movable upper plate of press for mounting die set stem in press slide; stationary foundation with part stripper; sleeve movably mounted in central opening of foundation and having yoke and flange movably and coaxially mounted in it; built-up punch; built-up die and wedges. Built-up punch includes group of movable Г-shaped inner cams placed in grooves of yoke and having working surfaces corresponding to outer protrusions of part. Built-up die includes group movable outer cams placed in grooves of yoke and having working surfaces corresponding to shape of outer and inner protrusions of part. Wedges are placed in through openings of flange and body of sleeve wall along its axis; number of wedges corresponds to that of outer cams. Wedges are provided with adjusting screws. Automatic press includes gate type feeder and control system with controller and with pickups for detecting upper and lower positions of press slide, initial position of gate of feeder, part knocking out from die set and also pickup for detecting press charging.

EFFECT: enhanced accuracy and operational reliability of die set.

3 cl, 6 dwg

 

The invention relates to the processing of metals by pressure and can be used in die tooling for forming protrusions in the tubular parts with automatic feeding, discharging part and the control system stamping process.

Famous stamp for forming internal ledges in the tubular part by A.C. No. 1117102, 21 D 22/02, comprising a fixed plate, which is equipped with a composite matrix consisting of a coaxially located between the Central rod and the ring sectors, on the working surface which has a recess whose shape corresponds to the configuration of the protrusions being formed in the details, and poloski with deformable punches, the working surface of which corresponds to the configuration of the formed elements, and a movable plate, bearing wedges installed with the ability to interact with poloskami. The sectors of the matrix is made in the form of l-shaped sectors, and the Central rod is rigidly connected with the movable plate.

The disadvantage of this stamp is inaccurate moulding parts due to manufacturing errors, and relative location of a large number of interacting parts of the stamp. For example, wedges movable plate and porzucek, Central rod and sectors of the matrix in the form of l-shaped levers, these levers and their axes of rotation. The process is exploitatie such a stamp even minor wear on the contact surfaces of the stamp quickly leads to a distortion of the desired shape of the stamped part, that generally leads to low quality parts. There is also not convenient loading and unloading molded parts in the stamp, as the item you want to set and then remove from the space between poloskami and annular sectors of the stamp. Possible capture the details of a holder, mounted on a movable plate, because it is made with an inner diameter corresponding to the outside diameter of the finished parts. All this reduces the performance of the stamp.

Closest to the claimed is a stamp for forming protrusions in the tubular part patent No. 2193940, 21 D 22/02, prototype, comprising a fixed base, a compound punch consisting of a coaxially located between a Central rod with a group of movable l-shaped inner Cam surfaces are in the form of outer projections details, a composite matrix consisting of groups of movable outer Cam surfaces are in the form of outer and inner protrusions parts and bushings with wedge grooves installed with the opportunity to interact with mating wedge surfaces of the outer Cams. In the body of the sleeve along its axis is a through hole movably mounted in the additional wedge punches arranged in the plane of the outer ku is accom, forming the inner protrusions being formed parts, and associated through holes in the flange rods thrust bearing mounted coaxially and slidably relative to the axis of the sleeve above the flange, while the mobility of the casing flange and the thrust bearing relative to the sleeve provided by springs of different stiffness.

The disadvantages of this stamp are lack of funds separate adjustment provisions outer Cams for conducting intervention stamp that does not allow to achieve the required precision stamped parts in terms of changes (within tolerance for different parties) mechanical and geometrical parameters of billet parts, and the inverse springback. In addition, the stamp has no means of automatic feeding and unloading of finished parts with the system management and control of the stamping process, which significantly reduces the performance of the stamp.

An object of the invention is to improve the accuracy and reliability of the stamp.

This technical problem is solved by the fact that the wedges are installed according to the number of external Cams and provided with adjusting screws, forming with wedges screw pair, located between the thrust bearing and the holder for the outer Cams forming the inner protrusions being formed parts and screw a couple between the flange of the sleeve to the outer Cam, forming external projections molded parts, stamped equipped with a rotary vane feeder with the ability to boot cycle simultaneous provisions molded part in the capture of the gate and in the annular gap between the matrix and punch stamp when the distance between the bottom end of the shroud and the base of the stamp is less than the height of the stamped part, where the device cloning machine equipped with a control system with a controller and built-in sensors the top of the press slide, the lower position of the stamp, the original position of the gate feeder, output details of the stamp, and the load sensor stamp set below the lower sensor position of the stamp on the level of the base of the stamp, which control signal on each subsequent turn on of the stroke of the press slide is formed under the condition that before the beginning of the working cycle of the press slide is installed in the upper position, and the gate of the feeder in the initial position, the interrupt and returns the current stroke of the press slide in the upper position is made, if the gate has not returned to its original position or stamped in the previous cycle, the part is left in the drive or the bottom of the cage has stopped its movement until it touches the base of the stamp, lock inclusion of the stroke of the press slide is made when the return of the press slide of the interrupted current is its stroke.

Increasing the number of wedges on the number of outside jaws, forming external projections, enables separate adjustment stamp for exterior and interior ledges details, it is possible to accurately provide the desired external and internal dimensions of parts on a few test pieces.

Adjustment screws, forming with wedges screw pair with their location between the thrust bearing and the holder for the outer Cams forming the inner protrusions being formed parts, and between the flange and the sleeve to the outer Cams forming external projections being formed parts, provide a sequence of forming protrusions detail in the stamp. In this sequence by compressing the weaker springs installed between the flange and the sleeve, the first molded outer ledges of the items, and then internal. This solution allows you to avoid uncertainty in the sequence of education final dimensions of molded parts and allows for adjustment of the stamp to ensure the accuracy of the external and internal dimensions of the parts independently of each other. The adjusting screws are conveniently located above the holder shank and provide for the accurate adjustment without removing the stamp from the press.

Equipment stamp slide feeder with the ability to boot cycle at the same time on the ogene molded part in the capture of the gate and in the annular gap between the matrix and punch stamp when the distance between the lower end of the holder and the stamp is less than the height of the stamped part, allows us to provide reliable and accurate penetration of the workpiece parts in the area of stamping. Thus, the operation of stamping the task is reliable ensure the accuracy of the relative position of the fixed plate against the moving of the stamp, which technically is solved by holding the part in the capture of the gate up until the part of the workpiece during the working stroke of the stamp will not appear in its annular gap between the matrix and punch followed by rapid removal of the gate from the zone forming.

The equipment of the stamp-control system with a controller and built-in sensors the top of the press slide, the lower position of the stamp, the original position of the gate feeder, output details of the stamp, and the load sensor stamp set below the lower sensor position of the stamp on the level of the base of the stamp, solves the problem of increasing the reliability of the stamp due to elimination of emergency situations, possible accidental failure of individual mechanisms stamp-machine or other emergency situation in the stamping process. The situation is defined as a failure if the controller detects not coincide with a given combination of the original state of the sensors or incorrect sequence of their operation p and the stamp.

Figure 1 shows a stamp machine in the collection in the middle position of the stroke, figure 2 cut-In stamp in the closed position, figure 3 cross-section B-B stamp, figure 4, figure 4 section a-a of figure 2, figure 5 slide the feeder from the rear side of figure 1 and figure 6 a detail view D figure 1.

Stamp (figure 2) contains the fixed base 1, the guides of the column 2, which has a sleeve 3. In the Central axial hole of the sleeve 3 with the ferrule 4, which has a radial grooves as the outer Cams 5 and 6, and the inner l-shaped Cams 7. The outer side edges of Cams 5 and 6 represent the wedge surface and the inner side of the axis of the stamp, the sides are work surfaces. Working surfaces of the Cams 5 and 6 are made in the form, respectively, the outer and inner protrusions being formed in the details, and the working surface of the inner l-shaped Cams 7 are made in the form of outer projections details.

The axis of the Cams 5 and 7 are in the same vertical plane and their working surfaces facing each other. Vertical shelf D-shaped Cam 7 is located in the Central hole of the holder 4 with the diameter of the holes is larger than the diameter of the workpiece being formed parts, and a horizontal shelf D-shaped Cam 7, which is located in the groove of the holder 4, is his guide. From the axis of the stamp internal the Cams 7 are wedge surface, mating with the response for the number of internal Cams 7 wedge faces of the Central core 13. Thus, the group of movable l-shaped inner Cam 7 forms a punch, and a group of movable outer Cams 5 and 6 - matrix.

In the initial position all the Cams biased by the spring 8 to the annular stop 9, mounted in the annular grooves of the holder 4, and between the working surfaces of the l-shaped Cam 7 and Cam 5, 6 (between the punch and the matrix is formed with the annular gap 10 (Fig 1), which can freely enter the workpiece being formed parts. The mobility of the cage 4 (on the return stroke of the press) is provided by a spring 11 and is limited by stops 12, mounted in the sleeve 3 with the possibility of relative movement along the slots of the cage 4.

The flange 15 is coaxially mounted over the upper end of the sleeve 3 on the springs 16. Similarly, above the flange 15 and coaxially him on the springs 17 mounted thrust bearing 18. Between the sleeve 3 and the flange 15, and between the flange 15 and the thrust bearing 18 has a gap on the magnitude of the stroke of the springs 16 and 17.

The gap between the sleeve 3 and the flange 15 is limited by a screw stop 19, and between the flange 15 and the thrust bearing 18 screw stop 20. In the body of the sleeve 3 along its axis is made through holes placed in them by the wedges 21 and 22, the axes of which are arranged in the vertical plane of the axes of the Cams 5 and 6, and the workers for whom arnosti wedges made in response wedge surfaces of the Cams and are in constant pairing between them.

The wedges 21 in its upper part between the sleeve 3 and the flange 15 to form a screw connection with adjusting screws 23. Similarly, the wedges 22 in its upper part to form a screw connection with adjusting screws 24 between the thrust bearing 18 and the holder 25. The upper ends of the adjusting screws 23 and 24 are made and displayed on the surface of the holder 25.

For fastening the movable part of the stamp on the press slide is a shaft 26 mounted on the thrust bearing 18 through 25.

On the plane of the base 1 is installed spring-loaded flat rods 28 with the tabs for removal of the formed part 29 and the yoke 4 under these rods are made groove 30. The stiffness of the spring 11 is substantially less than the total stiffness of the springs 16, and the latter is substantially less than the spring 17. In the press single action that allows you to work the stamp in the given sequence.

The base 1 stamp mounted on a plate 31 vane feeder 32. The feeder 32 has a gate 33, the bottom plane of which is at the level of the base 1. One end of the gate 33 is equipped with a spring-loaded gripper 34 and the source position is located under the vertical tray 35 loading blanks molded parts, the other end is connected with two shoulders lever 36, forming a rocker-polzuny mechanism. The second arm 37 of the lever 36 is in odnos Oranim circuit with a yoke 38, established interoperable its free end with a trunk 39, fixed on the top plate 40 of the press slide 41. In the initial position the gate two shoulders 33 and the lever 36 is held by a spring 42, a pair of rocker arm 38 with the shoulder 37 of the lever 36 is provided with a spring 43, and the gripper 34 is in the extended position, compressing the spring 44. The force of the elastic deformation of the spring 42 in the initial position exceeds the total force of the springs 43 and 44. The surface of the trunk 39, interacting with the shoulder 37 of the lever 36, is made with the sample to provide a given cycle of movement of the gate 33. In the plate 31 is made of a technological hole 45 to reset the formed part in the drive (not shown).

Device cloning machine is equipped with sensors (figure 1): the upper position of the RAM press (DVP), the lower position of the stamp (DNP), download stamp (DSS), output details of the stamp (DIA) and the original position of the gate (DIP), as well as the controller and the display unit, integrated in the control Cabinet pressure (not shown).

The stamp is as follows:

Before stamping press slide 41, the upper plate 40 mounted on it with a shank 26 of the die and the trunk 39 are in the original (upper) position. Parts fed from a hopper (not shown) slide feeder 32 and vertical fill the tray 35. The gate 33 apart the grip 34 is located under the tray 35 in the original position. Sleeve 3, the housing 4 of the stamp is in the upper position, the ferrule 4 under the action of the spring 11 is advanced from the bushing 3 down and held by the lugs 12. Between the ground plane 1 of the stamp and the bottom end of the casing 4 there is a free space on the height, the greater the height of the workpiece being formed parts. Springs 8, 16, 17 unclenched. When this outer Cams 5,6 extended outwards, the inner Cams 7 are shifted inward and form an annular gap 10, and between the bushing 3 and the flange 15 and the thrust bearing 18 has a gap on the magnitude of the stroke of the springs 16 and 17.

Included press drive by moving down the upper plate 40, the sleeve 3 of the stamp and the trunk 39. His last free end rotates the rocker arm 38 and with it the shoulder 37, compressing the spring two shoulders 42 of the lever 36, which moves the gate 33 in position "forward". In this position, the gripper 34 by its spring 44 holds taken from the feeder 35 of the workpiece being formed parts, and its cylindrical forming surface is located above the annular gap 10. The time of holding the workpiece being formed parts is determined by the horizontal length of the working part of the trunk 39 (from his end of the sample) and is calculated in such a way that during the movement of the working part of the stamp down and to hit the rocker arm 38 in the sample trunk 39 of the billet being formed parts were already inside the annular gap 10. When the priest is offering the end of the rocker arm 38 in the sample trunk 39 under the action of the spring 42 over his shoulder, two shoulders 37 of the lever 36 is returned together with the gate 33 to its original position. When this blank is molded part remains in the annular gap 10 between the matrix and punch stamp.

Next, the ferrule 4, reaching its bottom end to the base 1, is stopped, and the sleeve 3 and the Central rod 13 continue to move in relation to it, compressing the spring 11. When this outer Cams 5 and 6 interacting with the wedges 21 and 22 of the sleeve 3, previously closed, and the inner Cams 7, interacting with the wedge faces of the Central core 13, the pre-open. Selects the annular gap 10 up until the bottom end of the sleeve 3 snaps into the base 1. Next, the outer Cams 5 wedges 21 are stopped, forming a matrix, and the Central rod 13 continues to move downward, compressing the spring 16 to sample clearance between the bushing 3 and the flange 15 and pushing the inner Cams 7 to lock the outer Cams 5. The final shaping details on the outer edges.

After the full selection of clearance between the sleeve 3 and the flange 15 of the Central rod stops. Further, under the action of the press compresses the spring 17 and selects the gap between the flange 15 and the thrust bearing 18, which move down the wedges 22, interacting with their wedge surfaces with outer Cams 6 and finally shaping the inner tabs of the details.

When the movement of the press slide up stamp works is em in reverse order. This formed part 29 is retained by the puller 28 remains on the base 1 and is reset in the next cycle of operation of the stamp gate 33 through technological hole 45 in the drive. As the arm 38 is a one-way circuit with lever 37, the gate 33 on the return stroke of the press is not running.

The control system operates as follows.

When automatic mode in the initial position, press the controller polls the status of all sensors. This should only be enabled sensor fiberboard and deep, others are off. In this state, the controller issues a control command to switch on the drive stroke of the press slide 34 down. When lowering of the slide sensor fiberboard off and starts working cycle, where it is determined that the priority of the alarm. First off sensor DIP which show that has completed its working stroke of the gate 33. Then briefly activated sensor DVD, which shows that formed part left in the drive. Then again turns on the sensor DIP, fixing the return of the gate 33 in the initial position. Then, as the lowering of the press slide sensor triggers JS, locking the presence of items in the annular gap between the matrix and the punch. The last sensor triggers DNP, fixing the end of the stamping on the bottom position of the stamp. At about the feats of the course consistently off sensors DNP, DSS and in the initial position of the press slide is included fiberboard. Then the cycle repeats.

When breaking the cycle of operation of the sensors, the controller blocks the operation of the press. For example, if the sensor DNP worked first sensor DSS, the movement of the press slide immediately blocked and further work stamp-machine stops.

Stamp made, tested in operation and has shown positive results.

1. Stamp machine for forming protrusions in the tubular part containing a press, a movable upper press plate for mounting on the press slide shank stamp is mounted on the thrust bearing with holder, fixed base with a stripper parts movable in the Central hole of the base sleeve coaxially and slidably mounted therein the yoke and the flange, an integral plug, consisting of groups installed in the slots of the shroud movable l-shaped inner Cam surfaces are in the form of outer projections details, a composite matrix consisting of groups installed in the slots of the shroud movable outer Cam surfaces which are made by the form of outer and inner protrusions details and wedges located in the through holes of the flange and the body wall of the sleeve along its axis in conjunction with the response, the wedge faces of the outer Cams forming inside the e protrusions being formed parts characterized in that the wedges are installed according to the number of external Cams and provided with adjusting screws, forming with wedges screw pair, located between the thrust bearing and the holder for the outer Cams forming the inner protrusions being formed parts, and screw a couple between the flange and the sleeve to the outer Cams forming external projections being formed parts, stamp-machine equipped with a rotary vane feeder, providing boot cycle simultaneous position of the molded part in the capture of the gate and in the annular gap between the matrix and punch stamp when the distance between the bottom end of the shroud and the base of the stamp is less than the height of the stamped part, with the stamp-the machine is equipped with a control system with a controller and built-in sensors of the upper position of the press slide, the lower position of the stamp, the original position of the gate feeder, output details of the stamp, and the load sensor stamp set below the lower sensor position of the press slide at the level of the base of the stamp.

2. Stamp machine according to claim 1, characterized in that the working surface of the adjusting screws are made and displayed on the outer surface of the stamp through the holes of the holder shank stamp.

3. Stamp machine according to claim 1, characterized in that it is made of the conditions ensure the formation of the sending signal from the controller on each subsequent inclusion of the stroke of the press slide for a given combination of the original state of the sensors provided before beginning the work cycle of the press slide is installed in the upper position, and the gate of the feeder is in the initial position, the interruption of the current stroke and the return of the press slide in the upper position, if the gate has not returned to its original position, or stamped in the previous cycle, the part is left in the drive, or the bottom of the cage has stopped its movement until it touches the base of the stamp, lock inclusion of the stroke of the press slide when the return condition of the press slide from an interrupted current of the stroke.



 

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FIELD: plastic metal working, possibly die tools for forming protrusions in tubular parts in presses provided with systems for automatic feed and discharging parts and for controlling forming process.

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3 cl, 6 dwg

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