CN215615602U - Be applied to wire cut electrical discharge machining's big tapering cutting mechanism - Google Patents

Abstract

The utility model discloses a large-taper cutting mechanism applied to a linear cutting machine, wherein an upper liquid outlet is always corresponding to a lower liquid outlet under the action of a connecting rod transmission assembly, a wire electrode passes through the upper liquid outlet after bypassing an upper guide wheel, the lower liquid outlet bypasses a lower guide wheel and extends to a tension automatic control assembly, when large-taper cutting is carried out, the wire electrode is always positioned in the upper liquid outlet and the lower liquid outlet under the action of the connecting rod transmission assembly, cutting fluid can always wrap the wire electrode and enters a processing area along with the wire electrode, so that good washing, cooling and deionization functions are achieved, and positive effects on improvement of processing precision, cutting efficiency and surface quality are achieved. Meanwhile, the large-taper cutting mechanism is also provided with a tension automatic control assembly, so that the tension of the electrode wire can be adjusted in real time, the electrode wire cannot be stretched, the wire breakage probability is reduced, the electrode wire can be prevented from being too loose, and better processing precision and quality can be obtained under a constant tension value.

Description

Be applied to wire cut electrical discharge machining's big tapering cutting mechanism

Technical Field

The utility model relates to a large-taper cutting mechanism applied to a wire cutting machine.

Background

The high-speed reciprocating wire-moving electrospark wire-electrode cutting is an original electrospark machining technology in China, and a machine tool of the high-speed reciprocating wire-moving electrospark wire-electrode cutting machine has the advantages of simple structure, low production and use cost and the like, and is widely used in die manufacturing and part machining at present. In actual work, wire cutting is required to process not only straight patterns, but also various inclined planes and irregular planes. The equipment is required to have a taper cutting function to realize the processing of the inclined plane and the special-shaped plane.

However, in the conventional wire cutting machine, the position of the cutting fluid outlet cannot be adjusted along with the taper machining, so that the cutting fluid outlet cannot play a good role in washing, cooling and deionization, and the machining precision, the cutting efficiency and the surface quality of a workpiece are reduced.

In addition, during large-taper machining, the tension cannot be controlled, and the electrode wire is tightened and stretched along with the movement of the guide wheel in the upper machine head, so that the tension value is increased continuously; when the upper machine head gradually moves inwards, the original tightened electrode wire gradually loosens, and the tension value is continuously reduced because the electrode wire is stretched; the tension value is changed during the whole taper cutting, so that the precision of a machined part is poor, and grains appear on the surface. The larger the processing angle is, the higher the yarn breakage probability is, and the larger the tension value fluctuation is.

SUMMERY OF THE UTILITY MODEL

The utility model provides a large-taper cutting mechanism applied to a wire cutting machine, which overcomes the defects in the prior art. The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a big tapering cutting mechanism for wire cut electrical discharge machining, it is applicable to the wire electrode, and it includes board, UV axle drive assembly, connecting rod drive assembly, the head of going up, lower aircraft nose and tension automatic control assembly, UV axle drive assembly and tension automatic control assembly all install on the board, connecting rod drive assembly installs at the board, go up the aircraft nose and all be connected with connecting rod drive assembly and relative arrangement with lower aircraft nose, it is provided with guide pulley and last guide block to go up the head rotation, the aircraft nose rotates down and is provided with guide pulley and lower guide block down, it is equipped with the liquid outlet to go up the guide block, and it is corresponding with lower liquid outlet all the time to go up the liquid outlet under the effect of connecting rod drive assembly, and the wire electrode passes upper liquid outlet after walking around the upper guide pulley, and lower liquid outlet walks around the guide pulley again and extends to tension automatic control assembly.

In a preferred embodiment: the connecting rod transmission assembly comprises an upper connecting rod, an upper connecting rod driving shaft, a lower connecting rod driven shaft and a sleeve connecting rod, one end of the upper connecting rod driving shaft is hinged with the sleeve connecting rod, the other end of the upper connecting rod driving shaft is connected with the upper machine head, the top end of the upper connecting rod driving shaft is in transmission connection with the UV shaft transmission assembly, one end of the upper connecting rod is hinged with the sleeve connecting rod, and the other end of the upper connecting rod is hinged with the upper guide block; one end of the lower connecting rod driven shaft is hinged to the sleeve connecting rod, the other end of the lower connecting rod driven shaft is connected with the lower machine head, one end of the lower connecting rod is hinged to the sleeve connecting rod, and the other end of the lower connecting rod is hinged to the lower guide block.

In a preferred embodiment: the upper guide block and the upper guide wheel are coaxially arranged; the lower guide block and the lower guide wheel are coaxially arranged.

In a preferred embodiment: the upper guide block is upwards provided with two upper lugs which are respectively positioned at two sides of the upper guide wheel, an upper rotating shaft is additionally arranged, and the two upper lugs and the upper guide wheel are rotatably connected through the upper rotating shaft; the upper liquid outlet penetrates through the upper guide block from top to bottom and is positioned in the center of the upper guide block, and an upper groove is formed in the side direction of the upper liquid outlet.

In a preferred embodiment: the lower guide block is upwards provided with two lower lugs which are respectively positioned at two sides of the lower guide wheel, and a lower rotating shaft is additionally arranged, and the two lower lugs and the lower guide wheel are rotatably connected through the lower rotating shaft; the lower liquid outlet penetrates through the lower guide block from top to bottom and is positioned in the center of the lower guide block, and a lower groove is formed in the lateral direction of the lower liquid outlet.

In a preferred embodiment: the automatic tension control assembly comprises a driving motor, a sliding block, a weighing sensor, a sliding rail, a connecting block and a tension control guide wheel, the driving motor is installed on the machine table, the sliding block is in transmission connection with the driving motor and can slide along the sliding rail in a reciprocating mode, one end of the weighing sensor is fixedly connected with the sliding block, the other end of the weighing sensor is fixedly connected with the connecting block, the tension control guide wheel is installed on the connecting block, and the wire electrode bypasses the tension control guide wheel to automatically adjust the tension.

In a preferred embodiment: the other end of the weighing sensor is provided with a bearing area, and the connecting block is abutted and matched with the bearing area of the weighing sensor.

In a preferred embodiment: the top end of the connecting block is provided with a boss, the pressure bearing area of the weighing sensor is abutted against the bottom end face of the boss, and a screw is additionally arranged, so that the boss and the pressure bearing area are locked and connected through the screw, and the connecting block is fixedly connected with the other end of the weighing sensor.

In a preferred embodiment: the tension control guide wheel and the weighing sensor are respectively positioned on two opposite side edges of the connecting block.

Compared with the background technology, the technical scheme has the following advantages:

1. go up the liquid outlet and correspond with liquid outlet down all the time under connecting rod drive assembly's effect, the wire electrode passes the liquid outlet after walking around last guide pulley, the liquid outlet is walked around down the guide pulley again and is extended to tension automatic control subassembly, when carrying out the cutting of big tapering, the wire electrode is located the liquid outlet all the time under connecting rod drive assembly's effect, in the liquid outlet down, cutting fluid can wrap up the wire electrode all the time and get into machining area along with the wire electrode, consequently, play fine washing, cooling and deionization effect, to the machining precision, the improvement of cutting efficiency and surface quality plays the positive role. Meanwhile, the large-taper cutting mechanism is also provided with a tension automatic control assembly, so that the tension of the electrode wire can be adjusted in real time, the electrode wire cannot be stretched, the wire breakage probability is reduced, the electrode wire can be prevented from being too loose, and better processing precision and quality can be obtained under a constant tension value.

2. This tension automatic control subassembly can turn into the pulling force that the tension control guide pulley received with the tension of wire electrode and transmit this pulling force to weighing sensor's pressure-bearing area through the connecting block, produces the deformation after this pressure-bearing area atress, and the inside treater of sensor can turn into the deflection and send electrical signal output, and driving motor can be according to the removal orbit of this electrical signal adjustment slider, and then realizes the tensioning or the loosening of wire electrode, realizes tensile automatic control.

3. Through this screw in order to connect boss and bearing area looks lock and then with connecting block and weighing sensor other end rigid coupling for connection structure between connecting block and the weighing sensor is connected through boss and bearing area only, makes the pulling force furthest that the godet wheel received transmit to weighing sensor's bearing area through the connecting block, and weighing sensor's precision is higher.

4. The tension control guide wheel and the weighing sensor are respectively positioned on two opposite side edges of the connecting block, and the tension force received by the tension control guide wheel can be equivalent to the tension force received by the boss, so that the precision of the weighing sensor is further improved.

Drawings

The utility model is further illustrated by the following figures and examples.

Fig. 1 is a front view schematically illustrating a large taper cutting mechanism applied to a wire cutting machine according to a preferred embodiment.

Fig. 2 is a front view of a large taper cutting mechanism applied to a wire cutting machine according to a preferred embodiment, wherein the sleeve link is inclined.

FIG. 3 is a schematic view of the assembly of the upper head, the upper idler, and the upper guide block.

Fig. 4 is a schematic front view of fig. 3.

Fig. 5 is a schematic structural view of the automatic tension control assembly.

Fig. 6 shows an assembly schematic of the slide, load cell, connecting block and tension control guide roller.

Fig. 7 is a schematic view showing the structure of the load cell.

Detailed Description

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" and "fixedly connected" should be interpreted broadly, that is, any connection between the two that is not in a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.

In the claims, the specification and the drawings of the present invention, the terms "including", "having", and variations thereof, are intended to be inclusive and not limiting.

Referring to fig. 1 to 3, a preferred embodiment of a large taper cutting mechanism for a wire cutting machine, which is suitable for a wire electrode 1, includes a machine base, a UV shaft transmission assembly 10, a connecting rod transmission assembly 20, an upper machine head 30, a lower machine head 40, and an automatic tension control assembly 50.

As shown in fig. 1, the machine includes a vertical frame 101, an upper line frame 102 and a lower line frame 103, the upper line frame 102 and the lower line frame 103 are respectively connected with the vertical frame 101 and are arranged at an interval from top to bottom, and the UV axis transmission assembly 10 is installed on the upper line frame 102. The UV shaft transmission assembly 10 is prior art and will not be described in detail.

The automatic tension control assembly 50 is mounted on a vertical frame 101.

In this embodiment, the automatic tension control assembly 50 includes a driving motor 51, a sliding block 52, a weighing sensor 53, a sliding rail 54, a connecting block 55 and a tension control guide wheel 56, the driving motor 51 is installed on the machine, the sliding block 52 is connected to the driving motor 51 in a transmission manner and can slide along the sliding rail 54 in a reciprocating manner, one end of the weighing sensor 53 is fixedly connected to the sliding block 52, the other end of the weighing sensor 53 is fixedly connected to the connecting block 55, the tension control guide wheel 56 is installed on the connecting block 55, and the wire electrode 1 bypasses the tension control guide wheel 56 to automatically adjust the tension. As shown in fig. 5, the automatic tension control assembly further includes a motor box 57, a lead screw 58 and a control panel 59, the driving motor 51 is installed in the motor box 57, the lead screw 58 is connected with an output shaft of the driving motor 51 and extends out of the motor box 57, and the control panel 59 is installed on the surface of the motor box 57, so that the operation is convenient. The sliding block 52 is movably sleeved on the periphery of the screw rod 58, and the screw rod 58 rotates to drive the sliding block 52 to reciprocate along the sliding rail 54.

In this embodiment, as shown in fig. 6, a pressure-bearing area 531 is disposed at the other end of the load cell 53, and the connecting block 55 is abutted against and matched with the pressure-bearing area 531 of the load cell 53.

Specifically, the top end of the connecting block 55 is provided with a boss 551, the pressure-bearing area 531 of the weighing sensor 53 abuts against the bottom end face of the boss 551, and a screw 552 is further provided, so that the boss 551 and the pressure-bearing area 531 are locked and connected through the screw 552, and the connecting block 55 is further fixedly connected with the other end of the weighing sensor 53. And, the left side of the weighing sensor 53 abuts against the right side of the connecting block 55 to support the boss 551.

In this embodiment, the tension control guide roller 56 and the weighing sensor 53 are respectively located on two opposite sides of the connecting block 55. As shown in fig. 6, the tension control guide roller 56 and the load cell 53 are respectively located on the left and right sides of the connection block 55.

The connecting rod transmission assembly 20 is installed on a machine table, the upper machine head 30 and the lower machine head 40 are both connected with the connecting rod transmission assembly 20 and are oppositely arranged, the upper machine head 30 is rotatably provided with an upper guide wheel 31 and an upper guide block 32, the lower machine head 40 is rotatably provided with a lower guide wheel 41 and a lower guide block 42, the upper guide block 32 is provided with an upper liquid outlet 321, the lower guide block 42 is provided with a lower liquid outlet 421, the upper liquid outlet 321 is always corresponding to the lower liquid outlet 421 under the action of the connecting rod transmission assembly 20, and the electrode wire 1 bypasses the upper guide wheel 31, then passes through the upper liquid outlet 321 and the lower liquid outlet 421 and then bypasses the lower guide wheel 41 to extend to the automatic tension control assembly 50.

In this embodiment, as shown in fig. 1, the link transmission assembly 20 includes an upper link 21, an upper link driving shaft 22, a lower link 23, a lower link driven shaft 24 and a sleeve link 25, one end of the upper link driving shaft 22 is hinged to the sleeve link 25, the other end is connected to an upper machine head 30, the top end of the upper link driving shaft 22 is in transmission connection with the UV shaft transmission assembly, one end of the upper link 21 is hinged to the sleeve link 25, and the other end is hinged to an upper guide block 32; one end of the lower connecting rod driven shaft 24 is hinged with the sleeve connecting rod 25, the other end of the lower connecting rod driven shaft is connected with the lower machine head 40, one end of the lower connecting rod 23 is hinged with the sleeve connecting rod 25, and the other end of the lower connecting rod is hinged with the lower guide block 42.

In this embodiment, the upper guide block 32 is coaxially arranged with the upper guide wheel 31; the lower guide block 42 is arranged coaxially with the lower guide wheel 41.

In this embodiment, the upper guide block 32 is provided with two upper hangers 322 upward, the two upper hangers 322 are respectively located at two sides of the upper guide wheel 31, an upper rotating shaft 323 is further provided, and the two upper hangers 322 and the upper guide wheel 31 are rotatably connected through the upper rotating shaft 323; the upper liquid outlet 321 penetrates the upper guide block 32 from top to bottom and is located in the center of the upper guide block 32, and an upper groove is formed in the side of the upper liquid outlet 321. Similarly, the lower guide block 42 is provided with two lower lugs upward, the two lower lugs are respectively located at two sides of the lower guide wheel 41, and are further provided with a lower rotating shaft, and the two lower lugs are rotatably connected with the lower guide wheel 41 through the lower rotating shaft; the lower liquid outlet 421 vertically penetrates the lower guide block and is located at the center of the lower guide block 42, and a lower slot is laterally arranged on the lower liquid outlet 421.

The upper link driving shaft 22 can rotate relative to the sleeve link 25 under the action of the UV shaft transmission assembly 10 to drive the upper head 30, the upper guide wheel 31 and the upper guide block 32 to rotate synchronously, so as to cut with large taper. The upper connecting rod 21 can drive the upper guide block 32 to move left and right, and adjust the position of the upper liquid outlet 321 so that the upper liquid outlet 321 wraps the electrode wire 1 all the time. Similarly, the lower connecting rod 23 can drive the lower guide block 42 to move left and right, and adjust the position of the lower liquid outlet 421 in time, so that the lower liquid outlet 421 can wrap the wire electrode 1 all the time. Preferably, the wire electrode 1 is always located at the central axis position of the upper liquid outlet 321 and the lower liquid outlet 421.

As shown in fig. 1, the large taper cutting mechanism further includes a first guide wheel 2, a second guide wheel 3 and a third guide wheel 4, and a fourth guide wheel 5 is further rotatably disposed on the upper machine head 30, so that the wire electrode 1 is wound as follows:

the electrode wire passes through the upper liquid outlet 321 and the lower liquid outlet 421 after passing around the first guide wheel 2, the second guide wheel 3, the fourth guide wheel 5 and the upper guide wheel 31, then passes through the lower guide wheel 41, the third guide wheel 3 and the tension control guide wheel 56 and returns to the first guide wheel.

When carrying out big tapering cutting, wire electrode 1 is located liquid outlet 321, lower liquid outlet 421 all the time under connecting rod drive assembly 20's effect, and cutting fluid can wrap up wire electrode 1 all the time and get into the processing region along with wire electrode 1, consequently plays fine washing, cooling and deionization effect, plays positive effect to the improvement of machining precision, cutting efficiency and surface quality. Meanwhile, the large-taper cutting mechanism is also provided with an automatic tension control assembly 50 which can adjust the tension of the electrode wire 1 in real time, so that the electrode wire 1 cannot be stretched, the wire breakage probability is reduced, the electrode wire 1 can be prevented from being too loose, and better processing precision and quality can be obtained under a constant tension value.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, which is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a be applied to wire cut electrical discharge machining's big tapering cutting mechanism, its characterized in that includes the wire electrode: the automatic tension control device comprises a machine table, a UV shaft transmission assembly, a connecting rod transmission assembly, an upper machine head, a lower machine head and an automatic tension control assembly, wherein the UV shaft transmission assembly and the automatic tension control assembly are installed on the machine table, the connecting rod transmission assembly is installed on the machine table, the upper machine head and the lower machine head are connected with the connecting rod transmission assembly and are arranged oppositely, the upper machine head is provided with an upper guide wheel and an upper guide block in a rotating mode, the lower machine head is provided with a lower guide wheel and a lower guide block in a rotating mode, the upper guide block is provided with an upper liquid outlet, the lower guide block is provided with a lower liquid outlet, the upper liquid outlet corresponds to the lower liquid outlet all the time under the action of the connecting rod transmission assembly, and an electrode wire passes through the upper liquid outlet after bypassing the upper guide wheel and then bypasses the lower guide wheel to extend to the automatic tension control assembly.

2. The large taper cutting mechanism applied to the wire cutting machine according to claim 1, wherein: the connecting rod transmission assembly comprises an upper connecting rod, an upper connecting rod driving shaft, a lower connecting rod driven shaft and a sleeve connecting rod, one end of the upper connecting rod driving shaft is hinged with the sleeve connecting rod, the other end of the upper connecting rod driving shaft is connected with the upper machine head, the top end of the upper connecting rod driving shaft is in transmission connection with the UV shaft transmission assembly, one end of the upper connecting rod is hinged with the sleeve connecting rod, and the other end of the upper connecting rod is hinged with the upper guide block; one end of the lower connecting rod driven shaft is hinged to the sleeve connecting rod, the other end of the lower connecting rod driven shaft is connected with the lower machine head, one end of the lower connecting rod is hinged to the sleeve connecting rod, and the other end of the lower connecting rod is hinged to the lower guide block.

3. The large taper cutting mechanism applied to the wire cutting machine according to claim 2, wherein: the upper guide block and the upper guide wheel are coaxially arranged; the lower guide block and the lower guide wheel are coaxially arranged.

4. A large taper cutting mechanism applied to a wire cutting machine according to claim 3, wherein: the upper guide block is upwards provided with two upper lugs which are respectively positioned at two sides of the upper guide wheel, an upper rotating shaft is additionally arranged, and the two upper lugs and the upper guide wheel are rotatably connected through the upper rotating shaft; the upper liquid outlet penetrates through the upper guide block from top to bottom and is positioned in the center of the upper guide block, and an upper groove is formed in the side direction of the upper liquid outlet.

5. A large taper cutting mechanism applied to a wire cutting machine according to claim 3, wherein: the lower guide block is upwards provided with two lower lugs which are respectively positioned at two sides of the lower guide wheel, and a lower rotating shaft is additionally arranged, and the two lower lugs and the lower guide wheel are rotatably connected through the lower rotating shaft; the lower liquid outlet penetrates through the lower guide block from top to bottom and is positioned in the center of the lower guide block, and a lower groove is formed in the lateral direction of the lower liquid outlet.

6. The large taper cutting mechanism applied to the wire cutting machine according to claim 1, wherein: the automatic tension control assembly comprises a driving motor, a sliding block, a weighing sensor, a sliding rail, a connecting block and a tension control guide wheel, the driving motor is installed on the machine table, the sliding block is in transmission connection with the driving motor and can slide along the sliding rail in a reciprocating mode, one end of the weighing sensor is fixedly connected with the sliding block, the other end of the weighing sensor is fixedly connected with the connecting block, the tension control guide wheel is installed on the connecting block, and the wire electrode bypasses the tension control guide wheel to automatically adjust the tension.

7. The large taper cutting mechanism applied to the wire cutting machine according to claim 6, wherein: the other end of the weighing sensor is provided with a bearing area, and the connecting block is abutted and matched with the bearing area of the weighing sensor.

8. The large taper cutting mechanism applied to the wire cutting machine according to claim 7, wherein: the top end of the connecting block is provided with a boss, the pressure bearing area of the weighing sensor is abutted against the bottom end face of the boss, and a screw is additionally arranged, so that the boss and the pressure bearing area are locked and connected through the screw, and the connecting block is fixedly connected with the other end of the weighing sensor.

9. The large taper cutting mechanism applied to the wire cutting machine according to claim 8, wherein: the tension control guide wheel and the weighing sensor are respectively positioned on two opposite side edges of the connecting block.

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