阅读说明：本技术 一种筒形件成型装置和成型方法 (Cylindrical part forming device and forming method ) 是由 李�杰 王文伟 欧航 柳泉潇潇 王智辉 罗通 于 2021-09-03 设计创作，主要内容包括：本申请提供了一种筒形件成型装置和成型方法,其中,装置包括：柱型集磁器,柱型集磁器自其底面向顶面内凹形成有成型孔；成型孔的孔口与柱型集磁器的底面之间设置有环形斜面；柱型集磁器上还开设有沿竖直方向延伸的空隙；放电线圈,其套设于柱型集磁器；脉冲放电电路,其用于为放电线圈提供脉冲电流；垫块,其位于柱型集磁器的下方,垫块沿其厚度方向设置有滑动孔；冲头,冲头可滑动的设置在滑动孔中,并可定位于任意位置,并使待加工板材与柱型集磁器的底面之间保持预设间距。本装置可降低筒形件成型装置的制作成本,通过电磁脉冲成型的方式提升筒形件的成型效率,高速率变形条件下可提升待加工板材的延伸率,减少板材开裂,提升产品成品率。(The application provides a cylinder forming device and a forming method, wherein the device comprises: the column type magnetic collector is internally concave from the bottom surface to the top surface to form a forming hole; an annular inclined plane is arranged between the orifice of the forming hole and the bottom surface of the columnar magnetic collector; the columnar magnetic collector is also provided with a gap extending along the vertical direction; a discharge coil which is sleeved on the column-shaped magnetic collector; a pulse discharge circuit for supplying a pulse current to the discharge coil; the cushion block is positioned below the columnar magnetic collector and is provided with a sliding hole along the thickness direction; and the punch is arranged in the sliding hole in a sliding manner, can be positioned at any position, and keeps a preset distance between the plate to be processed and the bottom surface of the columnar magnetic collector. The device can reduce the manufacturing cost of the cylindrical part forming device, improve the forming efficiency of the cylindrical part in an electromagnetic pulse forming mode, improve the elongation of the plate to be processed under the high-rate deformation condition, reduce the cracking of the plate and improve the yield of products.)

1. A cylinder molding apparatus, comprising:

the cylindrical magnetic collector is arranged along the vertical direction, and a forming hole is formed in the cylindrical magnetic collector in a concave manner from the bottom surface to the top surface of the cylindrical magnetic collector; along the vertical direction, an annular inclined plane is arranged between the orifice of the forming hole and the bottom surface of the columnar magnetic collector; the columnar magnetic collector is also provided with a gap extending along the vertical direction, and the gap penetrates through the columnar magnetic collector from the radial direction of the forming hole;

the discharge coil is sleeved on the columnar magnetic collector;

the pulse discharge circuit is used for providing pulse current for the discharge coil;

the cushion block is positioned below the columnar magnetic collector and is provided with a sliding hole along the thickness direction;

the top surface of the punch is used for supporting a plate to be processed; the punch is arranged in the sliding hole in a sliding mode and can be positioned at any position, and a preset distance is kept between a plate to be processed and the bottom surface of the columnar magnetic collector.

2. A cylinder molding apparatus as defined in claim 1, wherein a high end of said annular slope is an opening of said molding hole, and a bottom end of said annular slope extends to a bottom surface of said pillar type magnet collector.

3. A cylinder molding apparatus as defined in claim 2, wherein said pillar type magnet collector has a bottom surface further provided with an annular flat surface, and a lower end of said annular inclined surface is an inner circular circumference of said annular flat surface.

4. A cylinder molding apparatus as defined in claim 1, wherein said molding hole penetrates from a bottom surface of said cylinder type magnet collector to a top surface of said cylinder type magnet collector.

5. A cylinder molding apparatus as defined in claim 1, wherein said column-type magnet collector has a column-type main body portion and an annular extension portion formed extending in a radial direction of said column-type main body portion from a bottom end side of said column-type main body portion; the discharge coil is sleeved on the column-shaped main body part; one surface of the annular extension part, which is back to the cylindrical main body part, is the bottom surface of the cylindrical magnetic collector; the gap extends along the axial direction of the column-shaped main body part and penetrates through the column-shaped main body part and the annular extending part from the radial direction of the forming hole.

6. A cylinder forming apparatus as defined in claim 1, wherein said pulse discharge circuit comprises: the electric capacity, the power, the switch that charges to and the discharge switch, the one end of the switch that charges is connected the first utmost point of electric capacity, the other end of the switch that charges is connected the second utmost point of electric capacity with the one end of discharge coil, the one end of discharge switch is connected the first utmost point of electric capacity, the other end of discharge coil is connected to the other end of discharge switch.

7. A cylinder forming apparatus as claimed in claim 1, wherein said forming hole has a diameter D₁Diameter D of the punch₂And the relation between the thickness t of the plate to be processed is as follows: d₁≥D₂+2t。

8. A cylinder forming apparatus as claimed in claim 1, wherein said predetermined pitch is 0.5mm to 1.0 mm.

9. A cylinder forming apparatus as defined in claim 1, further comprising: and the insulator is arranged in a space between a plate to be processed and the bottom surface of the columnar magnetic collector.

10. A cylinder forming method based on the cylinder forming apparatus according to any one of claims 1 to 9, comprising the steps of:

moving the punch in an axial direction of the slide hole and positioning the punch at a preset position;

placing the columnar magnetic collector above the cushion block along the vertical direction, and enabling the forming hole to be coaxial with the punch;

placing a plate to be processed between the top surface of the punch and the bottom surface of the columnar magnetic collector, and keeping the distance between the plate to be processed and the bottom surface of the columnar magnetic collector as a preset distance;

and sleeving the discharge coil on the columnar magnetic collector, and carrying out pulse discharge on the discharge coil through the pulse discharge circuit to enable the bottom surface of the columnar magnetic collector and the surface of the plate to be processed to form mutually exclusive pulse magnetic fields so as to enable the plate to be processed to move towards the punch at a high speed and deform.

Technical Field

The invention relates to the technical field of material shaping and forming, in particular to a cylindrical part forming device and a cylindrical part forming method.

Background

The existing cylindrical part forming methods are commonly provided with the following two methods:

one is stamping and deep drawing, and the stamping and deep drawing forming is to control the flow of the plate by the matching of a male die and a female die which are arranged up and down. Stamping and drawing are carried out through basic processes of cutting, forming, trimming and the like, and some complex drawn products are formed through multiple times, so that the processes are multiple. The influence of the size of the plate is great, the edge pressing flange is too small and is easy to wrinkle, and the edge pressing flange is too large and is difficult to feed and crack. The surface roughness, parallelism and verticality are reduced due to factors such as the processing quality of the male die and the female die and the processing abrasion, and the product is unqualified easily due to factors such as poor position and shape of the stretching rib in the forming process of the cylindrical part.

The other type is spinning processing, wherein the plate to be processed is fixed on a rotating core die, pressure is applied to the plate to be processed through a spinning wheel, the spinning wheel performs axial feeding simultaneously, and a cylindrical part is obtained through one or more times of processing. The forming and cutting of numerical control spinning can be completed on one numerical control spinning machine tool at the same time, but the spinning processing speed is slow, the productivity is lower, the method is more suitable for trial production and small-batch production, and the spinning processing is generally suitable for thicker plates.

Disclosure of Invention

The invention mainly solves the technical problems that the manufacturing cost of a cylindrical part forming device can be reduced, the forming efficiency of the cylindrical part is improved in an electromagnetic pulse forming mode, the elongation of a plate to be processed can be improved under the condition of high-rate deformation, the cracking of the plate is reduced, and the yield of products is improved.

According to a first aspect of the present application, there is provided a cylinder molding apparatus comprising:

the cylindrical magnetic collector is arranged along the vertical direction, and a forming hole is formed in the cylindrical magnetic collector in a concave manner from the bottom surface to the top surface of the cylindrical magnetic collector; along the vertical direction, an annular inclined plane is arranged between the orifice of the forming hole and the bottom surface of the columnar magnetic collector; the columnar magnetic collector is also provided with a gap extending along the vertical direction, and the gap penetrates through the columnar magnetic collector from the radial direction of the forming hole;

the discharge coil is sleeved on the columnar magnetic collector;

the pulse discharge circuit is used for providing pulse current for the discharge coil;

the cushion block is positioned below the columnar magnetic collector and is provided with a sliding hole along the thickness direction;

the top surface of the punch is used for supporting a plate to be processed; the punch is arranged in the sliding hole in a sliding mode and can be positioned at any position, and a preset distance is kept between a plate to be processed and the bottom surface of the columnar magnetic collector.

In one embodiment, the high end of the annular inclined plane is an orifice of the forming hole, and the bottom end of the annular inclined plane extends to the bottom surface of the columnar magnet collector.

In one embodiment, the bottom surface of the columnar magnetic collector is further provided with an annular plane, and the lower end of the annular inclined plane is the inner circle circumference of the annular plane.

In one embodiment, the molding hole penetrates from the bottom surface of the columnar magnetic collector to the top surface of the columnar magnetic collector.

In one embodiment, the column-type magnet collector has a column-type main body portion and an annular extension portion formed extending from a bottom end side of the column-type main body portion in a radial direction of the column-type main body portion; the discharge coil is sleeved on the column-shaped main body part; one surface of the annular extension part, which is back to the cylindrical main body part, is the bottom surface of the cylindrical magnetic collector; the gap extends along the axial direction of the column-shaped main body part and penetrates through the column-shaped main body part and the annular extending part from the radial direction of the forming hole.

In one embodiment, the pulse discharge circuit includes: the electric capacity, the power, the switch that charges to and the discharge switch, the one end of the switch that charges is connected the first utmost point of electric capacity, the other end of the switch that charges is connected the second utmost point of electric capacity with the one end of discharge coil, the one end of discharge switch is connected the first utmost point of electric capacity, the other end of discharge coil is connected to the other end of discharge switch.

In one embodiment, the diameter D of the forming hole₁Diameter D of the punch₂And the relation between the thickness t of the plate to be processed is as follows: d₁≥D₂+2t。

In one embodiment, the predetermined distance is 0.5mm to 1.0 mm.

In one embodiment, the method further comprises: and the insulator is arranged in a space between a plate to be processed and the bottom surface of the columnar magnetic collector.

According to a second aspect of the present application, there is provided a cylinder forming method based on the cylinder forming apparatus, including the steps of:

moving the punch in an axial direction of the slide hole and positioning the punch at a preset position;

placing the columnar magnetic collector above the cushion block along the vertical direction, and enabling the forming hole to be coaxial with the punch;

placing a plate to be processed between the top surface of the punch and the bottom surface of the columnar magnetic collector, and keeping the distance between the plate to be processed and the bottom surface of the columnar magnetic collector as a preset distance;

and sleeving the discharge coil on the columnar magnetic collector, and carrying out pulse discharge on the discharge coil through the pulse discharge circuit to enable the bottom surface of the columnar magnetic collector and the surface of the plate to be processed to form mutually exclusive pulse magnetic fields so as to enable the plate to be processed to move towards the punch at a high speed and deform.

According to the forming device and the forming method of the cylindrical part, the manufacturing cost of the forming device of the cylindrical part can be reduced, meanwhile, the forming efficiency of the cylindrical part can be improved in an electromagnetic pulse forming mode, the elongation of a plate to be processed can be improved under the condition of high-rate deformation, and the cracking of the plate can be reduced. Meanwhile, due to the arrangement of the annular inclined plane, the risk that the plate to be processed is cracked when the plate moves towards the punch can be further avoided, and therefore the appearance quality and the product yield of the cylindrical part are improved.

Drawings

FIG. 1 is a schematic structural view of a cylindrical member forming apparatus provided herein;

FIG. 2 is a schematic structural diagram of a magnetic concentrator in the cylinder forming device provided by the present application;

FIG. 3 is a first schematic view of a cylindrical member forming apparatus provided herein;

FIG. 4 is a schematic view of a second process for using the cylindrical member forming apparatus provided herein;

FIG. 5 is a third schematic view of the cylindrical member forming apparatus provided herein;

fig. 6 is a schematic view illustrating a fourth process of using the cylinder forming device provided by the present application.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

In the forming device and the forming method for the cylindrical part provided by the application, the plate 100 to be processed can be deformed at a high speed by means of electromagnetic pulses to form the cylindrical part with a cylindrical structure.

The first embodiment is as follows:

referring to fig. 1, the present embodiment provides a cylindrical member forming apparatus, including: a cylinder type magnetic collector 10, a discharge coil 20, a pulse discharge circuit 30, a spacer 40, and a punch 50.

The pillar-shaped magnetic collector 10 is generally made of an alloy material having high strength, high electrical conductivity, and the like, for example, a material such as chromium zirconium copper, beryllium copper, and the like. The pillar type magnetic collector 10 generates a pulse current on its surface in a pulse discharge state, and the pulse current is collected to the bottom surface of the pillar type magnetic collector 10 to form a pulse magnetic field. The pillar type magnet collector 10 is disposed in a vertical direction, that is, an axial direction of the pillar type magnet collector 10 is a vertical direction.

Referring to fig. 2, a molding hole 11 is formed on the pillar-type magnet collector 10 to be inwardly recessed from the bottom surface thereof toward the top surface, and an annular inclined surface 12 is provided between the opening of the molding hole 11 and the bottom surface of the pillar-type magnet collector 10 in the vertical direction. The columnar magnetic collector is further provided with a gap 13, the gap 13 extends in the vertical direction, and the gap 12 penetrates the columnar magnetic collector 10 from the radial direction of the molding hole 11.

In the present embodiment, the width of the gap 13 is usually 0.5mm to 1.0 mm.

The discharge coil 20 is sleeved on the cylindrical magnetic collector 10, and preferably adopts a spiral tube type wiring coil structure.

The output terminal of the pulse discharge circuit 30 is electrically connected to the input terminal of the discharge coil 20, for example, the pulse discharge circuit 30 is used to provide pulse current for the discharge coil 20.

The spacer 40 is located below the pillar type magnetic collector 10, and the spacer 40 is provided with a through-type sliding hole 41 in a thickness direction thereof. In the preferred embodiment, the side of the spacer 40 facing the pillar type collector 10 is flat.

The plate 100 to be processed is placed between the spacer 40 and the bottom surface of the pillar type magnet collector 10, and the top surface of the punch 50 is used to support the plate 100 to be processed. The punch 50 is slidably disposed in the sliding hole 41 of the spacer 40 and can be positioned at any position, and maintains a predetermined distance h (as shown in fig. 3) between the plate material 100 to be processed and the bottom surface of the pillar type magnet collector 10, which is typically 0.5mm to 1.0 mm. In this embodiment, the punch 50 is preferably a columnar structure.

In practical application, according to the law of electromagnetic induction and the skin effect, a first pulse current is generated on the outer circumferential surface of the columnar magnetic collector close to the discharge coil, and the first pulse current is converged to the bottom surface of the columnar magnetic collector 10 along the gap 13. The first pulsed current forms a first pulsed magnetic field. According to the electromagnetic induction law, a second pulse current is generated on the surface of the sheet material 100 to be processed, the second pulse current forms a second pulse magnetic field, the second pulse magnetic field and the first pulse magnetic field repel each other, so that the sheet material 100 to be processed moves towards the punch 50 at a high speed of up to 300m/s, and the rest part of the sheet material 100 to be processed, which is removed from contact with the top surface of the punch 50, is turned towards the cylindrical body of the punch 50 under the action of the punch 50, so that a cylindrical part is formed.

As shown in fig. 3, during the barrel molding processIn the above embodiment, since the annular inclined surface 12 is provided so that the first pulse current is converged to the bottom surface of the cylindrical magnetic collector 10, the plate material 100 to be processed is subjected to a force F perpendicular to the annular inclined surface 12 in the vicinity of the annular inclined surface 12, which includes not only the first component force F in the axial direction of the punch 50₁And also a second component F in the radial direction of the sheet 100 to be worked₂First component of force F₁So that the sheet 100 to be worked moves towards the punch 50 at a high rate, with a second component force F₂The plate 100 to be processed can be completely attached to the punch, and the plate 100 to be processed is prevented from cracking when moving towards the punch 50, so that the appearance quality and the product yield of the cylindrical part are improved.

In some embodiments, an insulator is further disposed in the space between the plate 100 to be processed and the bottom surface of the pillar-type magnetic collector 10, and in a preferred embodiment, the insulator at least completely covers the bottom surface of the pillar-type magnetic collector 10 to prevent an ignition phenomenon from occurring between the plate 100 to be processed and the bottom surface of the pillar-type magnetic collector 10 due to the first and second pulsed magnetic fields, which can improve the safety factor and the electromagnetic induction efficiency.

In some embodiments, the circumferential side edges of the top surface of the punch 50 are rounded to further avoid cracking of the sheet material 100 to be processed during processing.

In this embodiment, with continued reference to fig. 3, the high end 121 of the annular inclined surface 12 is the orifice of the forming hole 11, and the bottom end 122 of the annular inclined surface 12 extends to the bottom surface of the pillar type magnetic collector 10. The angle α shown in fig. 3 is an included angle between the plane of the annular inclined plane 12 and the horizontal plane, and by adjusting the angle α, the second component force F in the radial direction, which is received by the plate material 100 to be processed near the annular inclined plane 12 of the columnar magnetic collector 10, can be adjusted₂Can be adapted to the processing of plates made of different materials.

It should be noted that the requirements for processing plates made of different materials can be met by manufacturing the columnar magnetic collectors with different alpha angles.

In one embodiment, the bottom surface of the pillar-shaped magnetic collector 10 is further provided with an annular flat surface 14, and the lower end 122 of the annular inclined surface 12 is the inner circumference of the annular flat surface 14.

Of course, in another embodiment, another annular inclined surface 15 may be further disposed between the outer circumference of the annular flat surface 14 and the outer circumferential surface of the cylindrical magnetic collector 10, and the first pulse current may be converged to the annular flat surface 14 by the another annular inclined surface 15 and the aforementioned annular inclined surface 12.

Specifically, the cylindrical part forming device provided by the application is used as follows:

referring to fig. 3, a plate material 10 to be processed is placed on the top surface of the punch 50 between the pillar-type magnet collectors 10, and by moving the punch 50 upward in the axial direction of the slide hole 41, the punch 50 is maintained coaxial with the forming hole 11, and the top surface of the punch 50 is maintained at a preset interval from the bottom surface of the pillar-type magnet collector 10.

Referring to fig. 4, when the pulse generating circuit 30 is turned on and supplies a pulse current to the discharge coil 20, a first pulse current is generated on the outer circumferential surface of the cylindrical magnetic collector 10 near the discharge coil 20 according to the law of electromagnetic induction and the skin effect, and the first pulse current is converged to the annular flat surface 14 of the cylindrical magnetic collector 10 along the gap 13, the annular inclined surface 12, and the other annular inclined surface 15, and the first pulse current forms a first pulse magnetic field. According to the electromagnetic induction law, a second pulse current is generated on the surface of the plate 100 to be processed, the second pulse current forms a second pulse magnetic field, the second pulse magnetic field and the first pulse magnetic field repel each other, the plate 100 to be processed moves towards the punch 50 at a high speed, the rest part of the plate 100 to be processed, which is in contact with the top surface of the punch 50, is turned over towards the column body of the punch 50 under the action of the punch 50, and part of the plate 100 to be processed is turned over onto the cushion block 40, so that the first cylindrical part forming is completed.

Referring to fig. 5, the punch 50 is moved upward in the axial direction of the sliding hole 41, and the first formed cylindrical member is inserted into the forming hole 11, so that a predetermined distance is maintained between the plate to be processed, which is partially folded over the spacer 40, and the bottom surface of the pillar type magnetic collector 10.

Referring to fig. 6, when the pulse generating circuit 30 is turned on and supplies a pulse current to the discharge coil 20, a first pulse current is generated on the outer circumferential surface of the cylindrical magnetic collector 10 near the discharge coil 20 according to the law of electromagnetic induction and the skin effect, and the first pulse current is converged to the annular flat surface 14 of the cylindrical magnetic collector 10 along the gap 13, the annular inclined surface 12, and the other annular inclined surface 15, and the first pulse current forms a first pulse magnetic field. According to the electromagnetic induction law, a second pulse current is generated on the surface of the plate 100 to be processed, the second pulse current forms a second pulse magnetic field, the second pulse magnetic field and the first pulse magnetic field repel each other, so that the plate 100 to be processed moves towards the punch 50 in the direction of height rate, and the rest of the plate to be processed, which is attached to the punch 50, is removed after the first forming under the action of the punch 50 and is turned over towards the column body of the punch 50, so that the first cylindrical part forming is completed.

In the using process, the plate 100 to be processed is turned twice to form a cylindrical part, and the forming frequency of the cylindrical part is determined according to the stretching depth of the cylindrical part and the performance of the plate. Of course, in other embodiments, the material of the adopted plate is different, and the plate can be formed by one or more than two forming steps.

In an embodiment, the forming hole 11 may be a blind hole, or a through hole penetrating through the pillar-shaped magnet collector 10 in the vertical direction, and the shape and size of the forming hole 11 are similar to those of the cylindrical member to be formed, and in a preferred embodiment, the forming hole 11 is in a cylindrical shape. In the present embodiment, the molding hole 11 is a through hole penetrating the columnar magnetic collector 10 in the vertical direction, and specifically, the molding hole 11 penetrates from the bottom surface of the columnar magnetic collector 10 to the top surface of the columnar magnetic collector 10.

Referring to fig. 2, the column-type magnetic collector 10 has a column-type main body portion 111 and an annular extension portion 112, the annular extension portion 112 is formed extending from the bottom end side of the column-type main body portion 111 in the radial direction of the column-type main body portion 111, and the discharge coil 20 is fitted over the column-type main body portion 111. The surface of the annular extension portion 112 facing away from the column-shaped main body portion 111 is a bottom surface of the column-shaped magnetic collector 10, the gap 13 extends in the axial direction of the column-shaped main body portion 111, and the gap 13 penetrates the column-shaped main body portion 111 and the annular extension portion 112 from the radial direction of the molding hole 11.

In this embodiment, the diameter of the molding hole 11D₁Diameter D of the punch 50₂The relationship between the thickness t of the sheet material 100 to be processed is: d₁≥D₂+2 t. Thus, the cylindrical parts of different diameters can be formed by only replacing the columnar magnetic collectors 10 having the forming holes of different diameters.

As shown in fig. 1, the pulse discharge circuit 30 includes: a capacitor 31, a power supply 32, a charge switch 33, and a discharge switch 34. The power supply 32 adopts 220V commercial power, one end of a charging switch 33 is connected with a first pole of the capacitor 31, the other end of the charging switch 33 is connected with one end of the power supply 32, the other end of the power supply 32 is connected with a second pole of the capacitor 31 and one end of the discharge coil 20, one end of a discharge switch 34 is connected with the first pole of the capacitor 31, and the other end of the discharge switch 34 is connected with the other end of the discharge coil 20. Accordingly, when the charging switch 33 is closed and the discharging switch 34 is opened, the capacitor 31 is charged by the power supply 32, and when the capacitor 31 is charged to a saturated state, the charging switch 33 is opened and the discharging switch 34 is closed, so that the capacitor 31 supplies a pulse current to the discharging coil 20.

Example two:

referring to fig. 3 and 4, the present embodiment provides a method for forming a cylindrical part based on the cylindrical part forming apparatus in the above embodiments, including the following steps:

the punch 50 is moved in the axial direction of the slide hole 41, and the punch 50 is positioned at a predetermined position where the top surface of the punch 50 is consistent with the depth of the formed cylindrical part, and at this time, the material of the formed cylindrical part can satisfy the requirement of one-time forming, of course.

The pillar type magnet collector 30 is placed vertically above the spacer 40 with the molding hole 11 kept coaxial with the punch 50.

The sheet material 100 to be processed is placed between the top surface of the punch 50 and the bottom surface of the pillar type magnet collector 10 while maintaining the distance of the interval between the sheet material 100 to be processed and the bottom surface of the pillar type magnet collector 10 at a predetermined interval, which is preferably 0.5mm to 1.0 mm.

The discharge coil 20 is sleeved on the column-shaped magnetic collector 10, the charge switch 33 is closed, the discharge switch 34 is opened, the capacitor 31 is charged through the power supply 32, when the capacitor 31 is charged to a saturated state, the charge switch 33 is opened, the discharge switch 34 is closed, so that the capacitor 31 provides pulse current for the discharge coil 20, therefore, the pulse discharge circuit 30 is used for pulse discharge of the discharge coil 10, according to the law of electromagnetic induction and the skin effect, first pulse current is generated on the outer peripheral surface of the column-shaped magnetic collector 10 close to the discharge coil 20, the first pulse current is converged to the annular plane 14 of the column-shaped magnetic collector 10 along the gap 13, the annular inclined plane 12 and the other annular inclined plane 15, and the first pulse current forms a first pulse magnetic field. According to the electromagnetic induction law, the surface of the plate 100 to be processed generates a second pulse current, the second pulse current forms a second pulse magnetic field, and the second pulse magnetic field and the first pulse magnetic field repel each other, so that the bottom surface of the columnar magnetic collector 10 and the surface of the plate 100 to be processed form mutually repulsive pulse magnetic fields, so that the plate to be processed moves towards the punch 50 at a high speed to deform, thereby completing the forming of the cylindrical part.

In some embodiments, the above steps may be repeated several times according to the forming depth of the cylindrical part, the material of the plate 100 to be processed, and other factors until the cylindrical part is formed to meet the requirement.

During the forming process of the cylindrical part, the first pulse current is collected to the bottom surface of the cylindrical magnetic collector 10 due to the arrangement of the annular inclined surface 12, so that the plate material 100 to be processed is subjected to a force F perpendicular to the direction of the annular inclined surface 12 in the vicinity of the annular inclined surface 12, the force including not only the first component force F in the axial direction of the punch 50₁And also a second component F in the radial direction of the sheet 100 to be worked₂First component of force F₁So that the sheet 100 to be worked moves towards the punch 50 at a high rate, with a second component force F₂The plate 100 to be processed can be completely attached to the punch, and the plate 100 to be processed is prevented from cracking when moving towards the punch 50, so that the appearance quality and the product yield of the cylindrical part are improved.

In summary, the forming device and the forming method for the cylindrical part provided by the application can reduce the manufacturing cost of the forming device for the cylindrical part, improve the forming efficiency of the cylindrical part in an electromagnetic pulse forming mode, improve the elongation of the plate to be processed under the high-speed deformation condition, and reduce the cracking of the plate. Meanwhile, due to the arrangement of the annular inclined plane, the risk that the plate to be processed is cracked when the plate moves towards the punch can be further avoided, and therefore the appearance quality and the product yield of the cylindrical part are improved.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.