阅读说明：本技术 一种带状电极电火花切割装置 (Electric spark cutting device with strip-shaped electrode ) 是由 张广全 刘钢 于 2019-10-18 设计创作，主要内容包括：本发明公开带状电极电火花切割装置,包括：环形的带状电极；以及支架,所述支架上设置有可转动的主动带筒和从动带筒,所述带状电极套接在所述主动带筒和从动带筒之间,所述带状电极靠近工件的一侧边缘与工件之间进行电火花放电形成放电端面,所述支架上还设置有可转动的定位轮和补偿轮,所述定位轮和补偿轮分别位于所述带状电极的两侧,且所述补偿轮将所述带状电极的放电端面推入所述定位轮的V型槽内。本发明的带状电极的表面积远远大于电极丝的表面积,因此可向带状电极提供很大的脉冲电流,从而提高切割速度,满足生产要求。(The invention discloses a band electrode electric spark cutting device, comprising: a band-shaped electrode in a ring shape; the movable type band-shaped electrode comprises a driving band barrel and a driven band barrel, wherein the driving band barrel and the driven band barrel are rotatable, a band-shaped electrode is sleeved between the driving band barrel and the driven band barrel, an electric spark discharge is carried out between one side edge, close to a workpiece, of the band-shaped electrode and the workpiece to form a discharge end face, a rotatable positioning wheel and a rotatable compensation wheel are further arranged on the support, the positioning wheel and the compensation wheel are respectively located on two sides of the band-shaped electrode, and the compensation wheel pushes the discharge end face of the band-shaped electrode into a V-shaped groove of the positioning wheel. The surface area of the strip electrode is far larger than that of the electrode wire, so that a large pulse current can be provided for the strip electrode, the cutting speed is increased, and the production requirement is met.)

1. An electric discharge cutting device with a strip electrode, comprising:

a band-shaped electrode in a ring shape; and the number of the first and second groups,

the support, be provided with a rotatable initiative on the support and take a section of thick bamboo and a driven section of thick bamboo of taking, banded electrode cup joints between a section of thick bamboo and the driven section of thick bamboo of taking of initiative, banded electrode carries out the electric spark discharge and forms the discharge end face near one side edge of work piece and between the work piece, still be provided with rotatable positioning wheel and compensating wheel on the support, positioning wheel and compensating wheel are located respectively banded electrode's both sides, just the compensating wheel will banded electrode's the discharge end face pushes into the V type inslot of positioning wheel.

2. The electric spark cutting device with the strip-shaped electrode as claimed in claim 1, wherein the support is further provided with a compensation slide rail, one end of the compensation slide rail is connected with the compensation wheel, the other end of the compensation slide rail is connected with a spring, the other end of the spring is connected with the support, and the compensation slide rail can drive the compensation wheel to move under the action of the elastic force of the spring.

3. The electric spark cutting device with the strip electrode as claimed in claim 1, wherein the rotating shafts of the driving strip cylinder and the driven strip cylinder are respectively sleeved with a U-shaped power transmission slip ring, and the power transmission slip rings are electrically connected with the positive pole or the negative pole of the pulse power supply.

4. The electrical discharge cutting device with the strip electrode as claimed in claim 1, wherein the support is substantially L-shaped and comprises a transverse plate and a vertical plate, an included angle between the vertical plate and the horizontal plane is 60 degrees, the transverse plate is fixedly connected with the base, and the driving belt drum and the driven belt drum are arranged on the vertical plate.

5. The electric spark cutting device with the strip electrode as claimed in claim 4, wherein an insulating cushion block is arranged between the transverse plate and the base.

6. The spark-erosion cutting device with a strip electrode as claimed in claim 1, wherein a rotatable tensioning wheel is provided on the holder, said tensioning wheel being arranged on a side remote from the workpiece for tensioning the strip electrode.

7. The spark erosion cutting device as claimed in claim 2, wherein the positioning wheel and the compensation wheel are provided in two, respectively adjacent to the driving belt drum and the driven belt drum, and the compensation slide rail is also provided in two, respectively connected to the two compensation wheels.

8. The band electrode electric spark cutting device as claimed in claim 1, wherein the band electrode is made of molybdenum.

9. The spark erosion cutting device for strip electrodes as claimed in claim 1, wherein the strip electrode, the driving strip drum, the driven strip drum, the positioning wheel and the compensation wheel are all provided in two and symmetrically arranged on the support.

10. The electric spark cutting device for strip electrodes as claimed in claim 9, wherein the support includes two movable plates, both ends of the movable plates are connected with the support through sliders, the driving strip drum, the driven strip drum and the positioning wheels are disposed on the movable plates, and a distance between the two strip electrodes is adjustable by moving the sliders.

Technical Field

The invention relates to the field of electric spark cutting. And more particularly, to a band electrode electric discharge cutting apparatus.

Background

The electric spark machining is a method for machining a material by utilizing electric corrosion phenomenon in pulse discharge between a positive electrode and a negative electrode, is also called as electric discharge machining and electric erosion machining, and is a method for machining by utilizing electric energy and heat energy. The electric spark machining is widely applied to the field of machining of superhard materials, has the advantages of no influence of hardness of workpiece materials, high machining precision, capability of cutting parts with complex shapes and the like, and is one of effective methods for machining the superhard materials. In addition, the electric spark machining directly utilizes electric energy to machine the workpiece, and the machining almost has no large acting force, thereby being convenient for realizing automatic or unmanned operation. At present, common electric spark machining is wire cut electric spark machining, the wire cut electric spark machining is to cut and machine a workpiece by using an electrode wire as a spark discharge between a tool electrode and the workpiece, but the machining speed of the current wire cut electric spark machine is extremely low, and the current wire cut electric spark machine is not suitable for machining and producing mass products.

Disclosure of Invention

The invention aims to provide an electric spark cutting device with a strip electrode, which can greatly improve pulse current and realize the purpose of high-speed cutting.

According to an aspect of the present invention, there is provided a band electrode electric discharge cutting apparatus including: a band-shaped electrode in a ring shape; the movable type band-shaped electrode comprises a driving band barrel and a driven band barrel, wherein the driving band barrel and the driven band barrel are rotatable, a band-shaped electrode is sleeved between the driving band barrel and the driven band barrel, an electric spark discharge is carried out between one side edge, close to a workpiece, of the band-shaped electrode and the workpiece to form a discharge end face, a rotatable positioning wheel and a rotatable compensation wheel are further arranged on the support, the positioning wheel and the compensation wheel are respectively located on two sides of the band-shaped electrode, and the compensation wheel pushes the discharge end face of the band-shaped electrode into a V-shaped groove of the positioning wheel.

Preferably, the support is further provided with a compensation slide rail, one end of the compensation slide rail is connected with the compensation wheel, the other end of the compensation slide rail is connected with the spring, the other end of the spring is connected with the support, and the compensation slide rail can drive the compensation wheel to move under the elastic action of the spring.

Preferably, the rotation shafts of the driving belt drum and the driven belt drum are respectively sleeved with a U-shaped power transmission slip ring, and the power transmission slip ring is electrically connected with the positive pole or the negative pole of the pulse power supply.

Preferably, the support is generally L-shaped, and includes diaphragm and riser, the contained angle between riser and the horizontal plane is 60, diaphragm and base fixed connection, a driving belt section of thick bamboo and a driven belt section of thick bamboo set up on the riser.

Preferably, an insulating cushion block is arranged between the transverse plate and the base.

Preferably, the bracket is further provided with a rotatable tightening wheel, and the tightening wheel is arranged on one side far away from the workpiece and used for tightening the strip-shaped electrode.

Preferably, the positioning wheel and the compensation wheel are two and are respectively positioned close to the driving belt drum and the driven belt drum, and the compensation slide rail is also two and is respectively connected with the two compensation wheels.

Preferably, the strip electrode is made of molybdenum.

Preferably, the strip electrode, the driving belt drum, the driven belt drum, the positioning wheel and the compensation wheel are all arranged in two numbers and are symmetrically arranged on the bracket.

Preferably, the support comprises two movable plates, two ends of each movable plate are connected with the support through a sliding block, the driving belt drum, the driven belt drum and the positioning wheels are arranged on the movable plates, and the distance between the two strip electrodes can be adjusted by moving the sliding blocks.

The invention has the following beneficial effects:

the surface area of the strip electrode of the cutting device is far larger than that of the electrode wire, so that a large pulse current can be provided for the strip electrode, the cutting speed is increased, and the production requirement is met. Meanwhile, the discharge end face which is continuously pushed to be lost through the compensating wheel is always positioned in the V-shaped groove of the positioning wheel, and the discharge end face of the strip-shaped electrode is linearly positioned through the positioning wheel, so that the cutting precision is improved.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 shows a schematic structural diagram of the present invention.

Fig. 2 shows a schematic of the structure of the present invention.

FIG. 3 shows a schematic diagram of a workpiece structure in one embodiment of the invention.

Fig. 4 shows a schematic structural diagram of the present invention in which two strip electrodes are symmetrically arranged.

Fig. 5 shows a partial structural schematic of the present invention.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

In one embodiment of the electrical discharge cutting device for the strip electrode shown in fig. 1 and 2, the device comprises a strip electrode 10 and a support 20, wherein the strip electrode 10 is made of molybdenum strips, the molybdenum strips are connected end to form a ring, the support 20 is substantially L-shaped and comprises a transverse plate 21 and a vertical plate 22, the transverse plate 21 is fixedly connected to a base 30 through bolts, an insulating cushion block 23 is arranged between the transverse plate 21 and the base 30, and the pulse power supply output end is isolated from a power supply ground through the insulating cushion block 23. The vertical plate 22 is provided with a driving belt drum 24 and a driven belt drum 25, the belt-shaped electrode 10 is sleeved between the driving belt drum 24 and the driven belt drum 25, and the driving belt drum 24 is driven by a driving motor 26 to rotate, so that the belt-shaped electrode 10 is driven to circularly and reciprocally rotate around the driving belt drum 24 and the driven belt drum 25. The edge of the strip electrode 10 is brought into close proximity to the workpiece 40 to discharge electric spark discharge to form a discharge end face. The vertical plate 22 is also provided with a rotatable positioning wheel 27 and a rotatable compensation wheel 28, the positioning wheel 27 and the compensation wheel 28 are arranged on two sides of one end of the strip-shaped electrode 10 close to the workpiece 40, the circumferential edges of the positioning wheel 27 and the compensation wheel 28 are provided with V-shaped grooves, and the edges of two sides of the strip-shaped electrode 10 are respectively positioned in the V-shaped grooves. The compensation wheel 28 can apply a certain force to one side edge of the strip electrode 10, so that the other side edge of the strip electrode 10 is always positioned in the V-shaped groove of the positioning wheel 27, and the discharge end face line is always in a fixed position. After spark discharge occurs between the other side edge of the strip electrode 10, namely the discharge end face and the workpiece 40 and loss occurs, the compensating wheel 28 pushes one side edge of the strip electrode 10 to move, so that the other side edge of the strip electrode 10, namely the side where loss occurs, is always located in the V-shaped groove of the positioning wheel 27, namely when the discharge end face of the strip electrode 10 is lost, the compensating wheel 28 can timely push the discharge end face of the strip electrode to the bottom of the V-shaped groove of the positioning wheel 27, when the width of the strip electrode 10 is lost to be narrower and normal cutting is affected, a new strip needs to be replaced, and particularly, when the width of the strip electrode 10 is changed to 1 of 3 minutes of the total width, the new strip needs to be replaced.

The surface area of the strip electrode 10 is far larger than that of the wire electrode, and the strip electrode can provide large pulse peak current, so that the cutting speed is improved, and the requirement of large-scale production is met.

Specifically, a compensation slide rail 281 is disposed on the riser 22, one end of the compensation slide rail 281 is connected to the compensation wheel 28, the other end of the compensation slide rail 281 is connected to one end of the tension spring 282, the other end of the tension spring 282 is connected to the riser 22, and the compensation slide rail 281 can drive the compensation wheel 28 to move toward the positioning wheel 27 under the action of the tension spring 282.

Further, the rotating shafts of the driving belt drum 24 and the driven belt drum 25 are respectively sleeved with a power transmission slip ring 29, the power transmission slip ring 29 is in a U shape, leading-out ends at two ends of the power transmission slip ring can be electrically connected with the positive pole or the negative pole of the pulse power supply, and the pulse current is transmitted to the belt-shaped electrode 10 through the driving belt drum 24 and the driven belt drum 25, so that the belt-shaped electrode 10 is electrically connected with the positive pole or the negative pole of the pulse power supply.

Further, the included angle between the vertical plate 22 and the horizontal plane is 60 degrees, and when the workpiece 40 is fed in the horizontal direction, the included angle between the discharge end face of the strip electrode 10 and the workpiece 40 is 60 degrees. When the workpiece 40 is a multi-tooth sheet product as shown in fig. 3, continuous uniform point contact cutting can be achieved.

Furthermore, a rotatable tightening wheel 50 is arranged on the vertical plate 22, the tightening wheel 50 can be arranged on one side of the strip electrode 10 far away from the workpiece 40, the strip electrode 10 rotates around the driving belt cylinder 24, the driven belt cylinder 25 and the tightening wheel 50, and the tightening wheel 50 is used for tightening the strip electrode 10 to enable one side of the strip electrode 10 close to the workpiece 40 to be kept in a linear shape.

Further, the positioning wheel 27 and the compensation wheel 28 are provided in two, respectively adjacent to the driving belt drum 24 and the driven belt drum 25, and correspondingly, the compensation slide rail 281 and the tension spring 282 are also provided in two, respectively corresponding to the two compensation wheels 28. The structure can more timely push the discharge end face of the strip electrode 10 to the bottom of the V-shaped groove of the positioning wheel 27, and meanwhile, the two positioning wheels 27 can ensure the operation stability of the discharge end face of the strip electrode 10.

As shown in fig. 4 and 5, two strip electrodes 10 are symmetrically disposed on the support frame 2, and two sets of driving belt drums 24, driven belt drums 25, driving motors 26, positioning wheels 27, compensating wheels 28, compensating slide rails 281, power transmission slip rings 29 and tightening wheels 50 are also disposed corresponding to the two strip electrodes 10. The two strip electrodes 10 can simultaneously cut both sides of the workpiece 40, further increasing the cutting speed. Specifically, the two driving motors 26 drive the strip-shaped electrode 10 to simultaneously and rapidly perform a downward cutting motion from the discharge end surface of the inner straight section, and simultaneously, the cooling liquid is continuously pumped in to wash the two cutting surfaces downward, so as to remove dust generated by electric sparks and cool the strip-shaped electrode 10 and the workpiece 40.

Further, two movable plates 221 are disposed on the vertical plate 22, and both ends of each movable plate 221 are connected to the vertical plate 22 through sliders 222. The driving belt drum 24 and the driven belt drum 25, the driving motor 26, the positioning wheel 27, the compensating wheel 28, the compensating slide rail 281 and the tightening wheel 50 of each set are correspondingly and fixedly arranged on the movable plate 221, and the distance between the two strip-shaped electrodes 10 can be adjusted by adjusting the position of the sliding block 222, so that workpieces 40 with different widths can be cut, wherein a vertical plate is not shown in fig. 5, and only one side of the strip-shaped electrodes and the movable plate is reserved. The two driving belt drums 24 are rapidly rotated by the respective driving motors 26, so that the discharge end surfaces of the two belt electrodes 10 are rapidly moved downward at the same time, thereby simultaneously cutting both sides of the workpiece 40.

The output electrode of the pulse power supply is connected with the leading-out ends of the power transmission slip rings 29 on the two strip electrodes 10 through 8 cables, the other output electrode of the pulse power supply is connected with the workpiece 40, and the two strip electrodes 10 simultaneously carry out discharge cutting on two sides of the workpiece 40. When the position of the slider 222 is adjusted, the discharge end surfaces of the two strip electrodes 10 are formed into a substantially V-shape, thereby ensuring that the discharge is not formed on the wide surfaces of the strip electrodes 10. The product feeding part feeds one or more workpieces 40 between the two strip electrodes 10 at a constant speed, discharge cutting is started when the tooth sheets at the two ends of the product are close to the cutting end faces of the strip electrodes, redundant parts of the tooth sheets at the two ends of the product are gradually cut off and fall below a square hole in the middle of the bottom plate, and the purpose of cutting is finished.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.