CN210881019U

CN210881019U - Electromagnetic punching device suitable for composite material

Info

Publication number: CN210881019U
Application number: CN201921541606.0U
Authority: CN
Inventors: 罗通; 蔡达
Original assignee: Harbin Institute Of Technology Robot (yueyang) Military And Civilian Integration Research Institute
Current assignee: Harbin Institute Of Technology Robot (yueyang) Military And Civilian Integration Research Institute
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-06-30
Anticipated expiration: 2029-09-17

Abstract

The electromagnetic punching device is suitable for composite materials. The fiber reinforced composite material has the characteristics of high hardness, non-homogeneity, anisotropy and the like, and belongs to a typical difficult-to-process material. When the special-shaped hole drilling machine is used for hole machining, the problems that a cutter is fast in abrasion, the machining speed is slow and a special-shaped hole is not easy to machine in the machining process of drilling in the traditional machining process exist. The utility model discloses the constitution includes: the box, box upper portion and apron are connected, the apron lower part is connected with the solenoid cover, solenoid cover internally mounted has solenoid, solenoid is connected with the drive plate, the drive plate is connected with the top of amplifier, the amplifier bottom is connected with the drift, the drift below has a cut-out press, the cover has reset spring on the amplifier in the box, the blotter is installed to the reset spring outer lane, the blotter compresses tightly the cover through the blotter and is connected with the box, amplifier bottom cover has linear bearing, linear bearing is fixed through the strutting arrangement that punches a hole. The utility model is used for combined material punches a hole.

Description

Electromagnetic punching device suitable for composite material

The technical field is as follows:

the utility model relates to an electromagnetism punching device that is suitable for combined material.

Background art:

punching is one of common processes in stamping production and is widely applied to the manufacturing fields of vehicles, aerospace, ships, buildings and the like. The electromagnetic punching is a high-energy and high-speed processing method for punching by using pulsed magnetic field force instead of mechanical pressure, and has the characteristics of simple tool, low molding cost, high dimensional precision of a workpiece, suitability for processing a thin plate and the like.

The fiber reinforced composite material represented by the carbon fiber composite material has the characteristics of high specific strength and specific modulus, strong wear resistance, designability, excellent mechanical property and the like, and is widely applied to the fields of vehicles, aerospace, ships and the like. However, the fiber reinforced composite material is a typical difficult-to-process material due to its high hardness, non-homogeneity, and anisotropy. When the special-shaped hole is machined, the problems that a cutter is fast abraded, the machining speed is slow, the machining cost is high, the special-shaped hole is not suitable for mass production and is not easy to machine in the drilling process in the traditional machining process exist; a heat affected zone generated by laser processing in special processing is easy to cause damage of a processing surface; flame cutting is easy to form surface hardening; plasma cutting tends to form surface burns, making the quality of the holes too poor. Therefore, the method is not suitable for processing the carbon fiber composite material plate.

The utility model has the following contents:

the utility model aims at providing an electromagnetism punching device who is suitable for combined material remedies that traditional drilling and press punching speed are slow, the impact force is little and cause the shortcoming of damage to combined material easily to combined material's application in fields such as vehicle, aerospace.

The above purpose is realized by the following technical scheme:

the utility model provides an electromagnetism punching device suitable for combined material, includes the box, box upper portion and apron be connected, apron lower part and solenoid cover be connected, solenoid cover internally mounted have solenoid, solenoid be connected with electromagnetic generator, solenoid be connected with the drive plate, the drive plate be connected with the top of amplifier, the amplifier bottom be connected with the drift, drift below have a cut-out press, the amplifier in the box on the cover have a reset spring, the reset spring outer lane install the blotter, the blotter compress tightly the cover through the blotter and with the box be connected, amplifier bottom cover have linear bearing, linear bearing fixed through the strutting arrangement that punches a hole.

The electromagnetic punching device suitable for the composite material comprises a bearing support, an upright post and a base, wherein the bearing support is fixed at the bottom of the box body to fix the linear bearing, and two ends of the upright post are respectively connected with the bottom of the box body and the base.

The electromagnetic punching device suitable for the composite material is characterized in that the punching die is installed on the base and comprises a support, a punching die core is installed on the support, a workpiece is installed on the upper portion of the punching die core, the punching die core is a cylindrical hole opening B-shaped female die, and two conical holes corresponding to the limiting pins are formed in the cylindrical surface of the punching die core at intervals of 180 degrees.

The electromagnetic punching device suitable for the composite material is characterized in that the punch is of an integral structure made of die steel, is subjected to thermal refining and is connected with the amplifier through threads.

The electromagnetism punching device who is suitable for combined material, the cut-out press install the base on, the cut-out press include direction mold core, the mold core that punches a hole, the work piece is located direction mold core punch a hole between the mold core, direction mold core overcoat have an upper press plate, the mold core overcoat that punches a hole have a holding down plate, the upper press plate the holding down plate between fixed through the locating pin, the locating pin with the upper press plate the holding down plate between install mould reset spring respectively.

The electromagnetic punching device suitable for the composite material is characterized in that the punch comprises a long punch and a short punch, and the diameter of the lower end of the upper long punch is smaller than that of the lower short punch.

The electromagnetism punching device who is suitable for combined material, the strutting arrangement that punches a hole including the support that punches a hole, the support that punches a hole be by bearing fixed part, supporting part, the integrative structure that base portion constitutes, the bearing fixed part through fixing the bottom of box come to fix linear bearing, the base portion on install the mold core that punches a hole, mold core upper portion of punching a hole install the work piece, base portion have with the communicating blanking mouth of mold core that punches a hole.

The electromagnetic punching device suitable for the composite material is characterized in that a handle is mounted on the upper portion of the cover plate, and an electromagnetic punching switch and a trigger button are mounted on the handle.

Has the advantages that:

the utility model discloses an electromagnetic pulse scheme of punching a hole, compare in traditional machinery, pneumatics, hydraulic pressure and punch a hole, have that blanking speed is fast, blanking power is big, loading speed is high, the little advantage of damage that causes the work piece, the combined material board of specially adapted difficult processing and the punching a hole of thicker metal sheet.

The utility model discloses an electromagnetism scheme of punching a hole utilize be that solenoid passes through the strong electromagnetic field that the electric current produced and the back repulsion that produces between the eddy current magnetic field (opposite with aforementioned strong electromagnetic field direction) that produces around the drive plate drive the drift downstream, blanking power and blanking speed are great. The blanking device is suitable for the fields of vehicles and aerospace which have requirements on blanking force and blanking speed.

The utility model discloses fully consider the characteristics that the plasticity is poor, easily kick-backs that fibre reinforced composite exists among the punching process, adopted the split type combination drift of band edge. The sharp cutting edge of the punch facilitates rapid fiber cutting. The split type punch has the advantages that the upper portion of the split type punch is small in diameter, the lower portion of the split type punch is large in diameter, after the lower portion punch completes blanking, the upper portion punch pushes the lower portion punch out of a punching hole area of a plate under the action of electromagnetic force and inertia, and the problems that the punch is not prone to withdrawing and secondary damage is caused to hole making easily when the punch is withdrawn due to the fact that fibers and resin rebound to wrap the punch are avoided. Additionally, the utility model discloses still have simple structure, convenient operation, operation reliable, the steady quality of punching a hole, easy to maintain's advantage.

Description of the drawings:

fig. 1 is a schematic structural diagram of an electromagnetic punching device provided by an embodiment of the present invention.

FIG. 2 is a schematic structural view of the punching die of FIG. 1.

Fig. 3 is a sectional view a-a of fig. 2.

Fig. 4 is a partially enlarged view of B in fig. 3.

Fig. 5 is a schematic structural view of the punching core of fig. 3.

Fig. 6 is a schematic structural view of the stopper pin of fig. 3.

Fig. 7 is a perspective view of an electromagnetic punching device according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of an electromagnetic punching apparatus according to another embodiment of the present invention.

Figure 9 is a schematic diagram of the structure of the punch die of figure 8.

Fig. 10 is a schematic structural diagram of an electromagnetic punching apparatus according to another embodiment of the present invention.

Figure 11 is a view of the punch die of figure 10.

Fig. 12 is a structural view of an electromagnetic punching apparatus according to still another embodiment of the present invention.

Fig. 13 is a cross-sectional view C-C of fig. 12.

Fig. 14 is a perspective view of an electromagnetic punching apparatus according to another embodiment of the present invention.

In the figure: the device comprises a capacitor bank 1, an electromagnetic coil sleeve 2, an electromagnetic coil 3, a driving plate 4, an amplifier 5, a return spring 6, a cushion 7, a bearing support 8, a punch 9, a base 10, a punching die 11, a stand column 12, a linear bearing 13, a cushion pressing sleeve 14, a box body 15, a cover plate 16, a workpiece 17, a limiting pin 18, a support 19, a punching die core 20, a lower pressing plate 21, a positioning pin 22, a die return spring 23, a die upper pressing plate 24, a guide die core 25, a punching support 26, a handle 27, a long punch 901 and a short punch 902.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

the utility model provides a pair of be suitable for combined material's electromagnetism punching device's schematic structure, this electromagnetism punching device is applicable to punching a hole of metal and carbon-fibre composite sheet metal (below 2 mm).

As shown in fig. 1, an embodiment of the present invention provides an electromagnetic punching apparatus suitable for composite materials, which includes: the electromagnetic coil comprises an electromagnetic generator 1, an electromagnetic coil sleeve 2, an electromagnetic coil 3, a driving plate 4, an amplifier 5, a return spring 6, a buffer pad 7, a bearing support 8, a punch 9, a base 10, a punching die 11, a stand column 12, a linear bearing 13, a buffer pad pressing sleeve 14, a box body 15, a cover plate 16 and the like.

The electromagnetic generator 1 is internally provided with a plurality of high-voltage capacitors and is used for providing energy for the electromagnetic punching device, and the preset discharge energy is adjusted by the capacitors. The inside of the device is also provided with a control system (not shown), a current sampling device, a display screen (not shown) and a safety indicator lamp (not shown). The control system is used for controlling the capacitive charging and triggering discharging processes of the electromagnetic generator; the current collecting device can collect current signals in the electromagnetic punching process through the Rogowski coil; the display screen can display various parameters and results; the safety indicator light is used for prompting whether the current state of the worker is safe.

The electromagnetic coil sleeve 2 is fixed under the cover plate 16 through four screws, and is used for fixing the electromagnetic coil 3.

The electromagnetic coil 3, which is a flat spiral coil located below the cover plate 16 and above the driving plate 4, is fixed inside the electromagnetic coil housing 2. When the capacitor of the electromagnetic generator 1 is charged to a predetermined energy, the electromagnetic coil 3 discharges to form an RLC oscillation circuit and generates a high-amplitude alternating pulse current. The high amplitude alternating current produces a strong electromagnetic field B1 around the electromagnetic coil 3.

And the driving plate 4 is arranged below the electromagnetic coil, is a copper plate with high conductivity, and is covered with an insulating sticker on the surface to avoid sparking. A strong electromagnetic field B1 around the electromagnetic coil 3 can generate eddy currents on the drive plate 4 while generating an eddy current magnetic field B2 around the drive plate 4.

Since the strong electromagnetic field B1 near the electromagnetic coil 3 is opposite to the induced eddy current magnetic field B2 generated by the drive plate 4, a very large repulsive force is generated between the two magnetic fields. And (3) outputting a pulse force F with high strength and short duration, transmitting the pulse force F in the form of stress waves inside the punch, continuously reflecting, transmitting and superposing the pulse force F, and finally plastically deforming the workpiece 17 under the action of the stress waves and completing the punching process.

And the upper part of the amplifier 5 is connected with the driving plate 4 through four screws, and the lower part of the amplifier is connected with the punch through threads. The amplifier is used for transmitting the pulse force F generated by the two opposite magnetic fields B1 and B2.

And a return spring 6 for restoring the amplifier to an initial position after being compressed when the punching is completed once.

The buffer 7 is made of high impact polystyrene and is used for absorbing residual energy (stress wave) after the punching is finished, preventing the amplifier 5 from continuously moving downwards and protecting the return spring 6 from being damaged.

And the bearing bracket 8 is fixed on the outer surface of the bottom of the box body 15 through four screws and is used for fixing the linear bearing 13.

The linear bearing 13 is a circular flange type linear bearing, the upper end and the lower end of which are sealed by sealing rings, and the function of the linear bearing is to reduce the friction force of the amplifier 5 when the amplifier moves in the vertical direction.

The punch 9 is made of die steel, is subjected to thermal refining and is connected with the amplifier through threads.

The base 10 is used for bearing the whole electromagnetic punching device, is connected with the hydraulic upright 12 and is internally provided with a hydraulic pipeline of the hydraulic upright 12.

The hydraulic upright columns 12 are four in total, the lower parts of the hydraulic upright columns are connected with the base 10, the upper parts of the hydraulic upright columns are connected and fixed with the box body 15 through welding, and the hydraulic upright columns are used for supporting the box body and enabling the box body to move in the vertical direction.

The cushion pad pressing sleeve 14 is made of metal and fixed on the inner surface of the bottom of the box body through four screws and is used for fixing the position of the cushion pad 7.

The upper part of the box body 15 is fixedly connected with a cover plate 16 through six bolts, and the lower part of the box body is supported by the hydraulic upright post 12 and is used for bearing all parts above the punch.

As shown in fig. 2 to 3, the punching die 11 is composed of a stopper pin 18, a holder 19, a punching core 20, and the like.

The limit pin 18, which is a slotted headless screw, has a slotted front end and a section of external thread at its end, as shown in fig. 4, and serves to fix the punching mold core 20. When the punching mold core 20 is installed, the limiting pin is screwed out by a straight screwdriver, then the limiting pin is placed into the punching mold core, and finally the limiting pin is screwed in, so that the installation and fixation of the punching mold core are completed.

The lower part of the support 19 is embedded in a rectangular groove of the base 10, and the upper part is provided with a circular opening for positioning the punching mold core 20. As shown in the section A-A in FIG. 2, two stop pin holes are formed above the support 19, and the ends of the pin holes are internally threaded.

As shown in fig. 2-3, the punching die core 20 is a cylindrical hole B-shaped female die, which is beneficial to blanking the workpiece 17. The punching die core 20 is provided with two taper holes corresponding to the limit pins 18 on a cylindrical surface spaced by 180 degrees.

In summary, the working process of the electromagnetic punching apparatus provided by this embodiment is as follows:

(1) the electromagnetic generator 1 discharges electricity through the coil, and generates a strong electromagnetic field B1 in the electromagnetic coil 3.

(2) The strong electromagnetic field B1 induces eddy currents on the drive plate 13, and at the same time generates an eddy current magnetic field B2.

(3) The strong electromagnetic field B1 and the eddy magnetic field B2 are opposite in direction, and an opposing force is generated between the electromagnetic coil 3 and the drive plate 4. This force acts on the drive plate 5 and is transmitted to the punch through the amplifier and drives the punch to move downwardly, thereby completing the punching operation.

(4) After punching is completed, the magnifier hits the cushion 7, stops moving downwards, and returns to the initial position under the action of the return spring 6 to be ready for punching again.

Example 2:

fig. 8 is a structural diagram of an electromagnetic punching device according to another embodiment of the present invention, and fig. 9 is a structural diagram of an electromagnetic punching die according to another embodiment of the present invention.

As shown in fig. 9, in this embodiment, a die return spring 23 and a guide die core 25 are added on the basis of the previous embodiment, so as to adapt to punching of a thicker (2-5 mm) metal plate.

The guide die core 25 has a radius at the upper surface aperture for the punch to enter. The guide die core mainly has the functions of ensuring that the punch moves in the vertical direction and providing blank holder force for punching a thicker metal plate (an automatic briquetting device is not shown).

And a die return spring 23, after the punching process is completed, an automatic pressing device (not shown) is released, the upper pressing plate 24 moves upwards under the action of the die return spring 23, and the workpiece 17 is in a natural state so as to be fed by an automatic feeding mechanism (not shown).

The length of the punch 9 is longer than that of the previous embodiment due to the addition of the guide core.

An upper press plate 24 and a lower press plate 23 provide circumferential positioning for the guide core 25 and the punching core 20, respectively.

The positioning pins 22 are cylindrical positioning pins and are used for ensuring that the central holes of the upper and lower pressing plates are on the same numerical axis, so that the holes of the guide die core 25 and the punching die core 20 are on the same axis.

The working process of the electromagnetic punching device provided by the embodiment is the same as that of the previous embodiment.

Example 3:

fig. 10 is a structural diagram of an electromagnetic punching apparatus according to another embodiment of the present invention, and fig. 11 is a structural diagram of an electromagnetic punching die according to another embodiment of the present invention.

As shown in fig. 10, in the present embodiment, the structure of the punch 9 is improved on the basis of the previous embodiment, so as to be suitable for punching a thicker (2-5 mm) carbon fiber composite material plate.

The punch 9 adopts a split punch design, the diameter of the lower end of a long punch 901 positioned above is smaller, and the diameter of a short punch 902 positioned below is larger. After the lower short punch 902 completes blanking, the upper long punch pushes the lower punch out of the punching area of the plate under the action of electromagnetic force and inertia, so that the problems that the punch is not easy to withdraw and secondary damage is easily caused to hole making when the punch is withdrawn due to the fact that fibers and resin rebound to wrap the punch are avoided.

The working process of the electromagnetic punching device provided in this embodiment is substantially the same as that of embodiment 1. The difference is that a step of placing a short punch 902 into the guide core is added before the next punching process is performed.

Example 4:

fig. 12 is a structural diagram of an electromagnetic punching apparatus according to another embodiment of the present invention, and fig. 13 is a schematic three-dimensional structure diagram of an electromagnetic punching apparatus according to another embodiment of the present invention.

As shown in fig. 12 and 13, this embodiment is a simplified integration of some parts based on embodiment 1, and adds a handle to adapt to punching of metal and composite material plates in various situations.

The punching support 26 simplifies and integrates the structures of the bearing support 8, the base 10, the upright post 12, the support 19 and the like, so that the overall quality of the electromagnetic punching device is reduced, and the service life and the reliability are improved to a certain degree.

The handle 27 is fixedly connected with the upper surface of the cover plate 16 in a welding mode, and the handle 27 is further provided with an electromagnetic punching switch and a trigger button, so that the operation is convenient. For safety reasons, the control system on the electromagnetic generator 1 is not able to trigger the electromagnetic punching device when the switch button of the handle 27 is in the open state; when the switch button of the handle 27 is in the off state, the control system on the electromagnetic generator 1 can still trigger the electromagnetic punching device.

Due to the arrangement of the punching bracket 26 and the handle 27, the portable punching device provided by the embodiment can be suitable for various occasions, and particularly can exert the advantages of portability and flexibility under the condition that a punching workpiece cannot be freely moved.

Fig. 13 is a cross-sectional view at C-C. As shown in fig. 13, this embodiment is similar to embodiment 1 in that a slotted headless screw 18 is used to fix a punching die core 20.

The working process of the electromagnetic punching device provided in this embodiment is substantially the same as that of embodiment 1. The different places are mainly that the punching device can be held by hand, and a button is arranged at the handle, and the triggering mode is different.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An electromagnetic punching device suitable for composite materials, characterized in that: the electromagnetic coil is characterized by comprising a box body, box body upper portion and cover plate connection, the cover plate lower part be connected with the electromagnetic coil cover, electromagnetic coil cover internally mounted have solenoid, solenoid be connected with the electromagnetic generator, solenoid be connected with the drive plate, the drive plate be connected with the top of amplifier, the amplifier bottom be connected with the drift, drift below have a cut-out press, the amplifier in the box on the cover have reset spring, the reset spring outer lane install the blotter, the blotter compress tightly the cover through the blotter with the box be connected, amplifier bottom cover have linear bearing, linear bearing fixed through the strutting arrangement that punches a hole.

2. The electromagnetic punching apparatus suitable for composite materials according to claim 1, characterized by: the punching supporting device comprises a bearing support, an upright post and a base, wherein the bearing support is used for fixing the linear bearing through being fixed at the bottom of the box body, and two ends of the upright post are respectively connected with the bottom of the box body and the base.

3. An electromagnetic punching apparatus suitable for composite materials according to claim 2, characterized by: the punching die is arranged on the base and comprises a support, a punching die core is arranged on the support, a workpiece is arranged on the upper portion of the punching die core, the punching die core adopts a cylindrical hole opening B-shaped female die, and two taper holes corresponding to the limiting pins are formed in the cylindrical surface of the punching die core at 180-degree intervals.

4. An electromagnetic punching apparatus suitable for composite materials according to claim 3, characterized by: the punch is of an integral structure made of die steel, is subjected to thermal refining and is connected with the amplifier through threads.

5. An electromagnetic punching apparatus suitable for composite materials according to claim 2, characterized by: the punching die install the base on, the punching die include direction mold core, the mold core that punches a hole, the work piece is located the direction mold core the mold core that punches a hole between, direction mold core overcoat have an upper press plate, the mold core overcoat that punches a hole have a holding down plate, the upper press plate the holding down plate between fixed through the locating pin, the locating pin with the upper press plate the holding down plate between install mould reset spring respectively.

6. An electromagnetic punching apparatus suitable for composite materials according to claim 5, characterized by: the punch pin comprises a long punch and a short punch, wherein the lower end diameter of the upper long punch is smaller than the diameter of the lower short punch.

7. The electromagnetic punching apparatus suitable for composite materials according to claim 1, characterized by: the support device that punches a hole including the support that punches a hole, the support that punches a hole be by bearing fixed part, supporting part, the integrative structure that base portion constitutes, the bearing fixed part through fixing the bottom of box come to fix linear bearing, the base portion on install the mold core that punches a hole, mold core upper portion of punching a hole install the work piece, base portion have with the communicating blanking mouth of mold core that punches a hole.

8. An electromagnetic punching apparatus suitable for composite materials according to claim 7, characterized by: the upper part of the cover plate is provided with a handle, and the handle is provided with an electromagnetic punching switch and a trigger button.

9. The electromagnetic punching apparatus suitable for composite materials according to claim 8, wherein: the punch is of an integral structure made of die steel, is subjected to thermal refining and is connected with the amplifier through threads.