CN220028361U - Automatic punching device for grooving of shaft workpieces - Google Patents

Abstract

The utility model discloses an automatic punching device for grooving processing of shaft workpieces, which comprises a punching mechanism and a feeding mechanism, wherein the punching mechanism comprises a punch and a punching die, and a pressing mechanism for positioning the shaft workpieces on a punching station is arranged on the feeding end of a lower die of the punching die; the feeding mechanism comprises a material receiving block for receiving materials from a material hopper blanking port on the upper part through a feeding guide groove, the feeding guide groove is connected with a pressing groove on the lower die, the feeding mechanism further comprises a material ejection mechanism, shaft workpieces in the feeding guide groove are pushed onto a punching station of the lower die one by adopting a pushing block driven by a material ejection cylinder, and the punching machine and the material ejection cylinder are electrically connected with a PLC. The device not only has better working reliability and higher working efficiency, but also has simple structure and low manufacturing cost.

Description

Automatic punching device for grooving of shaft workpieces

Technical Field

The utility model relates to an automatic punching device for grooving processing of shaft workpieces.

Background

Currently, in order to ensure a positive fit with other components for better torque transmission, some shaft-type work pieces often require the formation of tangential straight grooves, so-called slots, in the side face near the end. For example, a shaft-like work 1 for a motor vehicle interior flap mechanism shown in fig. 8 is formed with the slots 1a symmetrically on both right and left sides near the end position.

There are generally two modes of turning and punching in the grooving process industry for the shaft workpiece 1, and compared with the turning process, the grooving process has short time consumption, high efficiency and relatively simple mechanism, so that the grooving process is more and more advantageous in pursuing efficient grooving process industry.

The punching device for processing the grooving 1a of the shaft workpiece 1 in the prior art mainly comprises a conventional punching machine and a punching die matched with the conventional punching machine, wherein the punching die comprises an upper die provided with a cutter and a lower die used for positioning the shaft workpiece and provided with a cutter avoiding groove, and a clamping mechanism used for clamping the shaft workpiece is arranged on the lower die; during actual processing, the shaft workpiece 1 is fixed at a punching station of a lower die through a clamping mechanism (on the punching station, a cutter can just punch a cutting groove 1a at a preset position of the shaft workpiece 1), after a punching machine is started, an upper die is driven by an upper platform of the punching machine to move downwards to drive the cutter to punch the cutting groove 1a at the preset position of the shaft workpiece 1. The cutters of the upper die are usually replaceable, the configuration of the cutters being dependent on the desired slot 1a to be machined. For example, for machining the bilaterally symmetrical slit 1a shown in fig. 8, the cutter also adopts a double-ended cutter having a symmetrical structure.

The traditional punching device is finished by manual work in feeding, clamping and discharging of the shaft workpiece 1, and has low efficiency, high labor intensity of workers and safety. The current punching device is further provided with a material ejection cylinder and a workpiece quick-mounting pressing block in design, the shaft workpiece 1 is ejected onto a punching station of the lower die through the material ejection cylinder, and then the pressing block is manually locked from the upper part to tightly press the shaft workpiece. After grooving is finished, the pressing block is opened manually, and then the ejection cylinder is operated to push the subsequent shaft workpiece to move so as to eject the shaft workpiece 1 subjected to grooving to the lower die to finish blanking. However, the introduction of the mechanism improves the overall processing efficiency of the punching device, but the following problems are still exposed in practical application:

1. the placement of the shaft workpiece 1, the operation of the ejection cylinder and the compression of the shaft workpiece 1 still need to be completed manually, and the use is still complicated, so that the overall working efficiency is still not improved effectively.

2. The shaft workpiece 1 and the lower die are metal pieces, the contact surface is very smooth, after the shaft workpiece 1 is pushed to a preset punching station by a material ejection cylinder, the shaft workpiece always moves forwards for a certain distance due to inertia, so that the shaft workpiece cannot stay on the preset punching station (the front end of a rotating shaft always protrudes out of the length of the punching station to a few centimeters), and therefore a cutter cannot accurately finish grooving operation on the preset position of the shaft workpiece 1 during punching, certain errors are generated, and the quality of the workpiece is reduced. If the error is too large, even the workpiece is directly scrapped.

3. The blanking of the shaft workpiece 1 needs to be manually observed to see whether the shaft workpiece is smoothly ejected out of the die, and once the workpiece is not actually ejected out due to human negligence, the ejection cylinder is started for ejection in a trade, so that the punching die and the shaft workpiece 1 are damaged.

It is obvious that, in view of the above-mentioned problems, the degree of automation of the conventional die cutting device for processing the slot 1a of the shaft workpiece 1 is still not high, and further improvement of the working reliability and the working efficiency is still needed.

Disclosure of Invention

The utility model aims at: the automatic punching device for grooving of the shaft workpiece has the advantages of being good in working reliability, high in working efficiency, simple in structure and low in manufacturing cost.

The technical scheme of the utility model is as follows: the utility model provides an axle class work piece automatic punching device for grooving processing, includes die-cut mechanism and feed mechanism, and die-cut mechanism includes punch press and die-cut mould, and die-cut mould is including being equipped with the cutter and by the last mould of punch press upper table drive decline and fix the lower mould on the punch press lower plate, and this lower mould one end is the feed end, and the other end is the discharge end, is equipped with the swager who is used for locating axle class work piece on die-cut station on its feed end, its characterized in that:

the pressing mechanism comprises an elastic pressing block which is arranged above the lower die through a spring and a screw, and an upper pressing groove is formed in the bottom of the elastic pressing block and is matched with the lower pressing groove arranged on the lower die so as to enable the shaft workpiece to be extruded into, pressed and positioned;

the feeding mechanism comprises a hopper, a material receiving block and a material ejection mechanism, a blanking port for a single shaft workpiece to pass through is arranged at the bottom of the hopper, the material receiving block is positioned below the hopper, a feeding guide groove opposite to the blanking port is arranged on the material receiving block, and the feeding guide groove is opposite to a pressing groove on the lower die; the ejection mechanism comprises a pushing block which is driven by an ejection cylinder to move along the feeding guide groove and has two working positions, and in the first working position, the pushing block avoids the upper shaft workpiece to fall into the feeding guide groove; in the second working position, the pushing block pushes the shaft workpieces in the feeding guide groove to the lower die punching station and is pressed and positioned by the pressing mechanism, and simultaneously, the shaft workpieces above the pushing block are prevented from falling into the feeding guide groove;

the automatic feeding device also comprises a PLC controller electrically connected with the punch controller and the ejection cylinder.

It should be noted that the concept of the punching station in the above scheme is the same as that of the prior art, namely, the preset station on the lower die, which can ensure that the upper die cutter punches the cutting groove at the preset position of the shaft workpiece.

According to the utility model, the elastic pressing block with the jacking force applied by the spring is used for compacting the shaft workpiece, so that the friction resistance on the surface of the shaft workpiece is greatly increased, and the kinetic energy generated when the shaft workpiece is ejected by the ejection mechanism is well weakened, so that the shaft workpiece can be better stopped at the punching station of the lower die. Even if the die-cut station can not be completely and accurately stopped, compared with the prior art, the length of the die-cut station protruding out of the die-cut station due to inertia is greatly reduced (the length of the die-cut station protruding out of the front end of the rotating shaft is reduced to a few millimeters), and the die-cut error is reduced to the maximum.

Of course, for shaft workpieces which still protrude out of the punching station due to inertia during ejection, the utility model further designs corresponding countermeasures as follows:

the upper die is fixedly provided with a workpiece correcting baffle plate which is positioned at the front part of the cutter and the lower end of the workpiece correcting baffle plate is lower than the cutter, the bottom of the workpiece correcting baffle plate is provided with an inclined part which faces to the shaft workpiece, and when the workpiece correcting baffle plate descends along with the upper die, the inclined part is used for extruding the end part of the shaft workpiece which protrudes out of the punching station due to inertia so as to horizontally push the shaft workpiece back to the punching station. Obviously, the introduction of the workpiece correcting baffle can further eliminate punching errors, so that the grooving processing position of the cutter on the shaft workpiece is more accurate, and the processing quality is greatly ensured.

Furthermore, the workpiece aligning baffle is driven by the upper die of the punching die, a driving mechanism is not needed to be additionally arranged, the mechanism setting of the punching die can be greatly simplified, and the whole manufacturing cost of the die is saved.

Furthermore, the utility model also comprises a blanking detection mechanism arranged at the discharging end of the lower die, wherein the blanking detection mechanism comprises an annular electromagnetic sensor electrically connected with the PLC, the annular electromagnetic sensor is used for detecting whether the shaft workpiece subjected to grooving passes through the annular electromagnetic sensor, and when the annular electromagnetic sensor does not detect that the shaft workpiece subjected to grooving passes through the annular electromagnetic sensor, the annular electromagnetic sensor sends a signal to the PLC, and the PLC controls the punch press and the ejection cylinder to stop working. The introduction of the annular electromagnetic sensor can save manpower, improve detection reliability and effectively avoid damage to the punching die and the shaft workpiece caused by the fact that the shaft workpiece after grooving is not smoothly ejected out of the die.

Further, the material ejection mechanism further comprises a sliding block fixed with the ejector rod of the material ejection cylinder; the lower part of the receiving block is provided with a sliding block guide groove for sliding block movement, the sliding block guide groove and the feeding guide groove are distributed in the same direction, and the sliding block guide groove and the feeding guide groove are communicated through a guide gap; the pushing block is integrally connected with the lower sliding block through a guide rib penetrating through the guide gap, and the pushing block is driven to move along the feeding guide groove by the material ejection cylinder through the driving sliding block. The design can greatly improve the stability and fluency of the ejection mechanism for driving the pushing block.

More preferably, in the present utility model, the PLC controller drives the ejection cylinder and the punch to alternately perform the following actions in sequence: the ejector rod of the ejection cylinder drives the ejector block to a second working position, the upper platform of the punching machine downwards drives the punching die to be closed, and the ejector rod of the ejection cylinder drives the ejector block to return to a first working position, so that the upper platform of the punching machine drives the punching die to reset.

More preferably, the feeding guide groove is a V-shaped groove with a circular arc transition bottom, and the pushing block is a cylindrical pushing block, so that the pushing block can be better attached to the feeding guide groove, and the matching reliability of the pushing block and the feeding guide groove is improved.

Further, in the utility model, the elastic pressing block is a rubber block, or a rubber layer which is in contact with the shaft workpiece is fixed on the inner surface of the upper pressing groove of the elastic pressing block, so that the friction resistance to the shaft workpiece is further increased.

Further, the lower die comprises a lower die base, a lower die extension backing plate and a lower die body block which are sequentially fixed from bottom to top, the lower die base is fixed on a lower platform of a punching machine, the material pressing mechanism and the lower pressing groove are arranged on the lower die body block, and the hopper and the material receiving block are both fixed on the lower die extension backing plate.

Still further, the ejection mechanism of the present utility model further comprises an L-shaped cylinder bracket including a lateral portion and a longitudinal portion, the lateral portion of which is fixed to the lower die extension pad, and the front end of the ejection cylinder is fixed to the longitudinal portion of the L-shaped cylinder bracket.

Further, in the utility model, the upper pressing groove and the lower pressing groove are both semicircular grooves.

It should be noted that the punching die structure in the present utility model, including the cutter thereof, is the prior art. As in the prior art, the cutters are replaceable, and the structural form of the cutters is determined according to the cutting grooves on the shaft workpieces to be processed.

The actual working principle of the utility model is as follows:

the ejector rod of the ejection cylinder is positioned at the fully retracted position in the initial stage, so that the pushing block in the receiving guide groove is positioned at the first working position at the moment, and the shaft workpiece in the upper hopper can fall into the feeding guide groove;

and then under the control of the PLC, the ejector rod of the ejection cylinder ejects first to drive the pushing block to move to a second working position along the material receiving guide groove, the shaft workpiece in the feeding guide groove is ejected to the lower die punching station and is pressed and positioned by the pressing mechanism, and meanwhile, the shaft workpiece above is blocked from falling into the feeding guide groove.

Then the punch press acts, drives the upper die to move downwards through the upper platform, and at the moment, if the workpiece aligning baffle is arranged on the upper die, the inclined part on the upper die can extrude the end part of the shaft workpiece protruding out of the punching station due to inertia so as to horizontally push the shaft workpiece back to the punching station. And finally, the die-cutting die is used for completing die assembly, and the upper die is used for cutting a cutting groove at a preset position of the shaft workpiece through a cutter on the upper die.

Then the ejector rod of the ejection cylinder is retracted to drive the pushing block to return to the first working position, so that a new shaft workpiece above the pushing block is ensured to fall down, and then the punch press acts to drive the upper platform to move upwards, so that the punching die is reset (namely, the upper die returns to the initial position under the action of the reset spring).

Finally, the PLC controls the ejection cylinder to work again, pushes a new shaft workpiece in the feeding guide groove to a punching station of the lower die, sequentially ejects the shaft workpiece which is subjected to the original grooving processing out of the pressing mechanism and the lower die by means of the ejection force of the new shaft workpiece (due to the lack of the blocking of the pressing mechanism, the shaft workpiece flies out of the lower die along a lower pressing groove of the lower die), and finishes blanking.

Under the control of the PLC, the punch press and the ejection cylinder alternately and repeatedly execute the actions in sequence, and continuously grooving the shaft workpiece.

And the annular electromagnetic sensor on the discharge end of the lower die is used for detecting whether the shaft workpiece subjected to grooving passes through the annular electromagnetic sensor, and when the annular electromagnetic sensor does not detect that the shaft workpiece subjected to grooving passes through the annular electromagnetic sensor, the annular electromagnetic sensor sends a signal to the PLC, and the annular electromagnetic sensor controls the punch press and the ejection cylinder to stop working and detect and eliminate the problems manually.

The utility model has the advantages that:

compared with the existing punching device, the punching device has the advantages of better working reliability, higher working efficiency, simple structure and low manufacturing cost, and has the following specific advantages:

1. according to the feeding mechanism designed in the utility model, the automatic blanking, automatic blocking and automatic ejection of the shaft workpieces can be realized by means of the matching of the hopper, the feeding block and the ejection mechanism, so that the shaft workpieces are pushed onto the punching station of the lower die one by one, manual participation is not needed in the process, and the integral automation degree and the working efficiency of the punching device are greatly improved.

2. According to the pressing mechanism, the shaft workpiece is automatically pressed by the elastic pressing block with the pushing force applied by the spring, so that the tedious step of manually clamping and positioning the shaft workpiece is eliminated, the working efficiency is improved, and the burden of workers is reduced.

3. According to the pressing mechanism, the shaft workpiece is pressed by the elastic pressing block with the jacking force applied by the spring, so that the friction resistance on the surface of the shaft workpiece is greatly increased, and the kinetic energy generated when the shaft workpiece is ejected by the jacking mechanism is well weakened, so that the shaft workpiece can be better stopped at a punching station of the lower die. Even if the die-cut station can not be completely and accurately stopped, compared with the prior art, the length of the die-cut station protruding out of the die-cut station due to inertia is greatly reduced (the length of the die-cut station protruding out of the front end of the rotating shaft is reduced to a few millimeters), and the die-cut error is reduced to the maximum.

4. According to the utility model, the workpiece correcting baffle is further arranged on the upper die, and the punching error can be further eliminated by introducing the workpiece correcting baffle, so that the grooving processing position of the cutter on the shaft workpiece is more accurate, and the processing quality is greatly ensured. And the workpiece aligning baffle is driven by the upper die of the punching die completely, so that a driving mechanism is not required to be additionally arranged, the mechanism setting of the punching die can be greatly simplified, and the whole manufacturing cost of the die is saved.

5. In the utility model, the elastic pressing block is a rubber block, or a rubber layer which is in contact with the shaft workpiece is fixed on the inner surface of the upper pressing groove of the elastic pressing block, so that the friction resistance to the shaft workpiece can be further increased.

6. The feeding mechanism, in particular the ejection mechanism, has compact design structure and good supporting stability and driving fluency for the pushing block.

7. According to the utility model, a blanking detection mechanism is further introduced, and the annular electromagnetic sensor is used for replacing manual detection of the discharging of the shaft workpiece, so that the labor can be saved, the detection reliability is improved, and the damage to the punching die and the shaft workpiece caused by the fact that the shaft workpiece subjected to grooving is not smoothly ejected out of the die is effectively avoided.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a schematic view of the initial state of the utility model (ejector cylinder ejector rod is not ejected, ejector block is positioned at the first working position, and punching die is not closed);

FIG. 2 is a schematic top plan view of FIG. 1 (the upper die and the cutter and workpiece return baffles below the upper die are shown in phantom);

FIG. 3 is a schematic diagram of the front view of the operating condition of FIG. 1 (ejector cylinder ejector pins are ejected, ejector blocks are located at a second operating position, and the punching die is closed);

FIG. 4 is a schematic top plan view of FIG. 3 (the upper die and its underlying cutters and workpiece alignment baffles are all shown in phantom);

FIG. 5 is a schematic diagram showing the front structure of a single punching die (die-assembled state) according to the present utility model;

FIG. 6 is a schematic diagram of the separate front structure of the pressing mechanism in the utility model;

FIG. 7 is a schematic diagram of a single front structure of a feeding mechanism in the utility model;

fig. 8 is a schematic view of a shaft-type workpiece for an automobile interior flip mechanism machined with double sided slots.

Wherein: 1. a shaft-like workpiece; 1a, grooving; 2. an upper die; 3. a cutter; 4. a lower die; 401. a lower die holder; 402. a lower die extension backing plate; 403. a lower die body block; 5. a material pressing mechanism; 501. a spring; 502. a screw; 503. an elastic pressing block; 503a, upper pressing groove; 6. pressing down the groove; 7. a hopper; 7a, a blanking port; 8. a receiving block; 8a, a feeding guide groove; 8b, a slide block guide groove; 8c, a guide gap; 9. a liftout cylinder; 901. a push rod; 10. a pushing block; 11. workpiece aligning baffle plate; 11a, a bevel; 12. a ring-shaped electromagnetic sensor; 13. a slide block; 14. a guide rib; 15. l-shaped cylinder bracket.

Detailed Description

Examples: the following describes a specific embodiment of the automatic punching device for grooving processing of shaft workpieces according to the present utility model with reference to fig. 1 to 8, as follows:

the present embodiment is directed to a shaft workpiece 1 to be machined, which is a shaft workpiece 1 for a flip mechanism in an automobile, as shown in fig. 8, and which has a columnar shape as a whole and symmetrical slits 1a on both right and left sides near the end portions, and which can efficiently, quickly and reliably perform machining operations on the slits 1a of the shaft workpiece 1.

Referring to fig. 1 to 7, the whole device of the embodiment is composed of a punching mechanism, a feeding mechanism, a pressing mechanism, a blanking detection mechanism and a PLC controller.

Firstly, the punching mechanism is composed of a punch (not shown in the figure) and a punching die arranged on the punch, as in the conventional technology. Specifically referring to fig. 1 to 5, the punching die is composed of an upper die 2 provided with a cutter 3 and driven by an upper platform of a punching machine to move downwards and a lower die 4 fixed on a lower platform of the punching machine, and the upper die 2 and the lower die 4 are assembled by a guiding limit column and a return spring (reference numeral is omitted in the figure) as in the conventional technology. In order to machine the bilaterally symmetrical slot 1a of the shaft workpiece 1 shown in fig. 8, the cutter 3 is a double-ended cutter having a symmetrical structure, and the lower die 4 is provided with a cutter avoiding slot (not shown) for avoiding the cutter 3.

As shown in fig. 1 to 4, one end of the lower die 4 is a feeding end, the other end is a discharging end, the feeding mechanism and the pressing mechanism are both arranged at the feeding end of the lower die 4, and the discharging detection mechanism is arranged at the discharging end of the lower die. The pressing mechanism 5 is used for positioning the shaft workpiece 1 on a punching station, and the concept of the punching station is the same as that of the prior art, namely, the preset station of the cutting knife 3 of the upper die 2 on the lower die 4, which can ensure that the cutting groove 1a is punched at the preset position of the shaft workpiece 1.

As shown in fig. 6, the pressing mechanism 5 in this embodiment is constituted by an elastic pressing block 503 mounted above the lower die 4 by two symmetrical sets of springs 501 and screw 502. The screw 502 passes through a through hole on the elastic pressing block 503 and is in threaded connection with the lower die 4, and the spring 501 is propped between a nut of the screw 502 and the elastic pressing block 503, so that the spring 501 applies to the elastic force of the elastic pressing block 503 to push the lower die 4.

The bottom of the elastic pressing block 503 is provided with an upper pressing groove 503a which is matched with a lower pressing groove 6 arranged on the lower die 4 so as to be used for extruding and pressing the shaft workpiece 1 for positioning.

The elastic pressing block 503 in this embodiment is a rubber block to further increase the friction resistance against the shaft workpiece 1. And the upper pressing groove 503a and the lower pressing groove 6 are semicircular grooves so as to better fit with the cylindrical shaft workpiece 1.

And in combination with fig. 1-4 and fig. 7, the feeding mechanism in this embodiment is composed of a hopper 7, a receiving block 8 and a material ejection mechanism. The bottom of the hopper 7 is provided with a blanking port 7a for a single shaft workpiece 1 to pass through, a receiving block 8 is positioned below the hopper, a feeding guide groove 8a opposite to the blanking port 7a is arranged on the receiving block, and the feeding guide groove 8a is opposite to a pressing groove 6 on the lower die 4.

The ejection mechanism consists of an ejection cylinder 9, a push block 10, a sliding block 13, a guide rib 14 and an L-shaped cylinder bracket 15. The pushing block 10 is driven by the ejection cylinder 9 to move along the feeding guide groove 8a and has two working positions, and in the first working position, the pushing block 10 avoids the upper shaft workpiece 1 to fall into the feeding guide groove 8 a; in the second working position, the pushing block 10 pushes the shaft workpiece 1 in the feeding guide groove 8a to the punching station of the lower die 4, and the shaft workpiece 1 is pressed and positioned by the pressing mechanism 5, and meanwhile, the upper shaft workpiece 1 is prevented from falling into the feeding guide groove 8 a.

Specifically, as shown in fig. 7, the front end of the ejector rod 901 of the ejector cylinder 9 is fixed to the slider 13. The lower part of the receiving block 8 in the embodiment is provided with a sliding block guide groove 8b for a sliding block 13 to move, the sliding block guide groove 8b and the feeding guide groove 8a are distributed in the same direction, and the sliding block guide groove 8b and the feeding guide groove 8a are communicated through a guide gap 8 c; the pushing block 10 is integrally connected with the lower sliding block 13 through a guide rib 14 penetrating through the guide gap 8c, and the ejector cylinder 9 drives the pushing block 10 to move along the feeding guide groove 8a through the driving sliding block 13. The design can greatly improve the stability and fluency of the ejection mechanism for driving the push block 10.

In this embodiment, the feeding guide groove 8a is a V-shaped groove with a circular arc transition at the bottom, and the pushing block 10 is a cylindrical pushing block, so that the pushing block can be better attached to the feeding guide groove 8a, and the matching reliability of the pushing block and the feeding guide groove is improved.

Referring to fig. 1 to 4, fig. 6 and fig. 7, in this embodiment, the lower die 4 is composed of a lower die holder 401, a lower die extension pad 402 and a lower die body block 403, which are sequentially fixed from bottom to top, the lower die holder 401 is fixed on a lower platform of the punching machine, the material pressing mechanism 5 and the lower pressing groove 6 are arranged on the lower die body block 403, and the hopper 7 and the material receiving block 8 are both fixed on the lower die extension pad 402. The L-shaped cylinder support 15 includes a lateral portion and a longitudinal portion, the lateral portion of which is fixed to the lower die extension pad 402 with screws, and the front end of the ejector cylinder 9 is fixed to the longitudinal portion of the L-shaped cylinder support 15.

The punch controller and the ejection cylinder 9 are electrically connected with a PLC controller (omitted in the figure), and the PLC controller drives the ejection cylinder 9 and the punch to alternately execute the following actions in sequence: the ejector rod 901 of the ejection air cylinder 9 ejects out to drive the ejector block 10 to the second working position, the upper platform of the punching machine downwards drives the punching die to be closed, the ejector rod 901 of the ejection air cylinder 9 retreats to drive the ejector block 10 to return to the first working position, and the upper platform of the punching machine upwards drives the punching die to reset.

Referring to fig. 1 to fig. 4, another important design improvement of the present embodiment is that a workpiece aligning baffle 11 located at the front portion of the cutter 3 and lower than the cutter 3 is further fixed on the upper die 2, an inclined portion 11a facing the shaft workpiece 1 is provided at the bottom of the workpiece aligning baffle 11, and when the workpiece aligning baffle 11 descends with the upper die 2, the inclined portion 11a is used for extruding the end portion of the shaft workpiece 1 protruding out of the punching station due to inertia, so as to horizontally push the shaft workpiece 1 back to the punching station.

Still referring to fig. 1 to 4, in this embodiment, the blanking detection mechanism is formed by a ring electromagnetic sensor 12 electrically connected to the PLC controller and a bracket (not shown) for fixing the ring electromagnetic sensor 12 to the discharge end of the lower die 4, where the ring electromagnetic sensor 12 is used to detect whether the shaft workpiece 1 after grooving passes therethrough, and when the ring electromagnetic sensor 12 does not detect that the shaft workpiece 1 after grooving passes therethrough, it sends a signal to the PLC controller, and the punch press and the ejection cylinder 9 are controlled by the ring electromagnetic sensor to stop working.

The actual working principle of this embodiment is as follows:

initially, the ejector rod 901 of the ejector cylinder 9 is located at a fully retracted position, so that the push block 10 in the receiving guide groove 8a is located at a first working position at this time, so that the shaft workpiece 1 in the upper hopper 7 can fall into the feeding guide groove 8a, as shown in fig. 1 and 2;

then under the control of the PLC controller, the ejector rod 901 of the ejection cylinder 9 ejects first to drive the ejector block 10 to move to a second working position along the material receiving guide groove 8a, the shaft workpiece 1 in the material feeding guide groove 8a is ejected to a punching station of the lower die 4 and is pressed and positioned by the material pressing mechanism 5, and meanwhile, the shaft workpiece 1 above is prevented from falling into the material feeding guide groove 8a, as shown in fig. 3 and 4.

Then the punch press acts, the upper die 2 is driven to move downwards through the upper platform, and the inclined part 11a of the workpiece aligning baffle 11 on the upper die 2 can extrude the end part of the shaft workpiece 1 protruding out of the punching station due to inertia so as to horizontally push the shaft workpiece 1 back to the punching station. The die-cutting die finally completes die-closing, and the upper die 2 die-cuts the cutting groove 1a at a predetermined position of the shaft-like workpiece 1 by a cutter 3 thereon.

Then the ejector rod 901 of the ejection cylinder 9 is retracted to drive the push block 10 to return to the first working position, so that the new shaft workpiece 1 above falls down, and then the punch press acts to drive the upper platform to move upwards, so that the punching die is reset (namely, the upper die 2 returns to the initial position under the action of a reset spring).

Finally, the PLC controls the ejection cylinder 9 to work again, pushes the new shaft workpiece 1 in the feeding guide groove 8a to the punching station of the lower die 4, sequentially ejects the shaft workpiece 1 processed by the original grooving 1a out of the pressing mechanism 5 and the lower die 4 by means of the ejection force of the new shaft workpiece 1 (due to the lack of the blocking of the pressing mechanism 5, the shaft workpiece 1 flies out of the lower die 4 along the lower pressing groove 6 of the lower die 4), and finishes blanking.

Under the control of the PLC, the punch press and the ejection cylinder 9 alternately and repeatedly execute the above actions in sequence, and continuously perform grooving processing on the shaft workpiece 1.

The annular electromagnetic sensor 12 on the discharge end of the lower die 4 is used for detecting whether the shaft workpiece 1 after grooving passes through, and when the annular electromagnetic sensor 12 does not detect that the shaft workpiece 1 after grooving passes through, the annular electromagnetic sensor sends a signal to the PLC, and the PLC controls the punch press and the ejection cylinder 9 to stop working and manually detects and eliminates problems.

The above embodiments are merely for illustrating the technical concept and features of the present utility model, and are not intended to limit the scope of the present utility model to those skilled in the art to understand the present utility model and implement the same. All modifications made according to the spirit of the main technical proposal of the utility model should be covered in the protection scope of the utility model.

Claims (10)

1. The utility model provides an axle class work piece automatic punching device for grooving processing, includes die-cut mechanism and feed mechanism, and die-cut mechanism includes punch press and die-cut mould, and die-cut mould is including being equipped with cutter (3) and by last mould (2) of punch press upper table drive decline and lower mould (4) of fixing on the punch press lower platform, and this lower mould (4) one end is the feed end, and the other end is the discharge end, is equipped with on its feed end to be used for with axle class work piece (1) location swager mechanism (5) on die-cut station, its characterized in that:

the pressing mechanism (5) comprises an elastic pressing block (503) which is arranged above the lower die (4) through a spring (501) and a screw (502), wherein an upper pressing groove (503 a) is formed in the bottom of the elastic pressing block (503) and is matched with a lower pressing groove (6) arranged on the lower die (4) so as to enable the shaft workpiece (1) to be extruded and pressed for positioning;

the feeding mechanism comprises a hopper (7), a material receiving block (8) and a material ejection mechanism, wherein a blanking port (7 a) for a single shaft workpiece (1) to pass through is formed in the bottom of the hopper (7), the material receiving block (8) is positioned below the hopper, a feeding guide groove (8 a) opposite to the blanking port (7 a) is formed in the material receiving block, and the feeding guide groove (8 a) is opposite to a pressing groove (6) on the lower die (4); the ejection mechanism comprises a push block (10) which is driven by an ejection cylinder (9) to move along the feeding guide groove (8 a) and has two working positions, and in the first working position, the push block (10) avoids the upper shaft workpiece (1) to fall into the feeding guide groove (8 a); in the second working position, the pushing block (10) pushes the shaft workpiece (1) in the feeding guide groove (8 a) to a punching station of the lower die (4) and is pressed and positioned by the pressing mechanism (5), and simultaneously, the shaft workpiece (1) above is blocked from falling into the feeding guide groove (8 a);

the automatic feeding device also comprises a PLC controller electrically connected with the punch controller and the ejection cylinder (9).

2. The automatic punching device for grooving processing of shaft workpieces according to claim 1, wherein the upper die (2) is further fixed with a workpiece aligning baffle (11) which is positioned in front of the cutter (3) and the lower end of which is lower than the cutter (3), the bottom of the workpiece aligning baffle (11) is provided with an inclined part (11 a) which faces to the shaft workpiece (1), and when the workpiece aligning baffle (11) descends along with the upper die (2), the inclined part (11 a) is used for extruding the end part of the shaft workpiece (1) protruding out of the punching station due to inertia so as to horizontally push the shaft workpiece (1) back to the punching station.

3. The automatic punching device for grooving process of shaft workpieces according to claim 1 or 2, further comprising a blanking detection mechanism arranged at the discharge end of the lower die (4), wherein the blanking detection mechanism comprises an annular electromagnetic sensor (12) electrically connected with the PLC, the annular electromagnetic sensor (12) is used for detecting whether the shaft workpiece (1) subjected to grooving process passes through, and when the annular electromagnetic sensor (12) does not detect that the shaft workpiece (1) subjected to grooving process passes through, the annular electromagnetic sensor sends a signal to the PLC, and the PLC controls the punch and the ejection cylinder (9) to stop working.

4. An automatic punching device for grooving process of shaft-like workpieces according to claim 1, characterized in that the ejection mechanism further comprises a slider (13) fixed to an ejector rod (901) of the ejection cylinder (9); the lower part of the receiving block (8) is provided with a sliding block guide groove (8 b) for a sliding block (13) to move, the sliding block guide groove (8 b) and the feeding guide groove (8 a) are distributed in the same direction, and the sliding block guide groove and the feeding guide groove (8 a) are communicated through a guide gap (8 c); the pushing block (10) is integrally connected with the lower sliding block (13) through a guide rib (14) penetrating through the guide gap (8 c), and the ejection cylinder (9) drives the pushing block (10) to move along the feeding guide groove (8 a) through the driving sliding block (13).

5. The automatic punching device for grooving process of shaft workpieces according to claim 1 or 4, wherein the PLC controller drives the ejection cylinder (9) and the punch to alternately perform the following actions in sequence: the ejector rod (901) of the ejection air cylinder (9) ejects out to drive the ejector block (10) to a second working position, the upper platform of the punching machine downwards drives the punching die to be closed, the ejector rod (901) of the ejection air cylinder (9) returns to drive the ejector block (10) to return to the first working position, and the upper platform of the punching machine upwards drives the punching die to return.

6. An automatic punching device for grooving process of shaft-like workpieces according to claim 4, characterized in that the feed guide groove (8 a) is a V-shaped groove with a bottom arc transition, and the push block (10) is a cylindrical push block.

7. The automatic die cutting device for grooving process of shaft-like work pieces according to claim 1 or 2, wherein the elastic pressing block (503) is a rubber block or a rubber layer contacting the shaft-like work piece (1) is fixed to an inner surface of the upper pressing groove (503 a) of the elastic pressing block (503).

8. The automatic punching device for grooving process of shaft workpieces according to claim 1 or 2, wherein the lower die (4) comprises a lower die holder (401), a lower die extension base plate (402) and a lower die body block (403) which are sequentially fixed from bottom to top, the lower die holder (401) is fixed on a lower platform of a punching machine, the material pressing mechanism (5) and the lower pressing groove (6) are arranged on the lower die body block (403), and the hopper (7) and the material receiving block (8) are both fixed on the lower die extension base plate (402).

9. An automatic punching device for grooving process of shaft-like work pieces according to claim 8, characterized in that the ejector mechanism further comprises an L-shaped cylinder holder (15), the L-shaped cylinder holder (15) comprising a transverse portion and a longitudinal portion, the transverse portion of which is fixed to the lower die extension pad (402), and the front end of the ejector cylinder (9) being fixed to the longitudinal portion of the L-shaped cylinder holder (15).

10. An automatic punching device for grooving process of shaft-like work pieces according to claim 1 or 2, characterized in that the upper pressing groove (503 a) and the lower pressing groove (6) are both semicircular grooves.