Gantry type wire cutting machine

Abstract

The invention relates to the technical field of electric meter wiring, in particular to a gantry type wire cutting machine which comprises a supporting assembly, a wire cutting assembly and a wire cutting assembly. The wire moving assembly comprises wire guide nozzles fixed at one ends of the two support arms, and electrode wires which sequentially penetrate through the upper wire guide nozzle and the lower wire guide nozzle and can be conveyed; the discharge assembly comprises an extension arm capable of vertically translating, a steering engine fixed at one end of the extension arm, a fork frame fixed on a rotating shaft of the steering engine, and a conductive block which slides in the fork frame along the axial direction of the rotating shaft of the steering engine, and the conductive block is connected with the negative electrode of the pulse power supply; and a compression assembly. The height of the conductive block is adjusted according to the thickness of a workpiece, the length of the discharge section of the electrode wire is shortened, position adjustment of the conductive block and control over the length of the discharge section of the electrode wire are combined, energy consumption is effectively reduced, and the probability that the electrode wire is broken during adjustment in the prior art is further avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electric meter wiring, and in particular to a gantry wire cutting machine. Background Art

[0002] A wire cutting device is a processing device based on the principle of electric discharge machining. It uses the high-frequency pulsed discharge generated between a thin metal wire and a workpiece, and erodes the metal material through the instantaneous high temperature during discharge, thereby gradually eroding the workpiece material and finally cutting out a part with the required shape.

[0003] In the prior art, in order to adapt to the thickness of different workpieces, wire cutting devices basically have a design for spacing adjustment, that is, adjusting the spacing between the arms where two wire nozzles are located, and the workpiece is cut at this spacing. The purpose of the adjustment is to avoid the situation where when processing a thinner workpiece, due to the excessive length of the spacing between the two, the stretched electrode wire is also too long. The too-long electrode wire is prone to tremor during processing, resulting in easy breakage of the electrode wire and uneven cutting surface.

[0004] The above technology still has deficiencies in use, such as Figure 9 As shown, the conductive block is usually fixed on the arm. Although it has the ability of fine position adjustment, it is mostly to avoid the electrode wire always wearing the same position, affecting the conductive stability of the conductive block. Its position relative to the electrode wire does not change much as a whole. This makes the discharge section length of the electrode wire still very long (the discharge section is the distance of the electrode wire from the position where it cooperates with the conductive block to the position where it cooperates with the workpiece). Since the electrode wire and the workpiece are in a conducting circuit loop during processing, there is an unnecessary wire loss in the section of the discharge section that does not cooperate with the workpiece, undoubtedly increasing the energy consumption. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the above or prior art, the present invention is proposed.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A gantry wire cutting machine, comprising, A support assembly, which includes a gantry and arms fixed to the upper and lower sides of the gantry; A wire feeding assembly, which includes wire nozzles fixed to one end of two arms, and an electrode wire that sequentially passes through the upper and lower wire nozzles and can be transported; A discharge component, which includes an extension arm capable of vertical translation, a servo motor fixed to one end of the extension arm, a fork fixed to the rotating shaft of the servo motor, and a conductive block sliding axially along the rotating shaft of the servo motor within the fork. The conductive block is connected to the negative electrode of a pulse power supply; and A pressing component, which includes pressing wheels arranged above and below the opposite side of the conductive block, and the pressing wheels can move along the sliding direction of the conductive block; The pressing wheels press the electrode wire against the conductive block to connect it to the negative electrode of the pulse power supply. The height of the conductive block is adjusted adaptively according to the thickness of the workpiece to make it close to the top of the workpiece, shortening the length of the discharging section of the electrode wire and reducing the energy consumption.

[0008] As a preferred solution of the gantry wire cutting machine of the present invention, wherein: the wire feeding component further includes a wire releasing wheel fixed above the inside of the gantry, a wire taking-up wheel fixed below the inside of the gantry, a motor one connected to one end of the wire releasing wheel for driving its rotation, and a motor two connected to one end of the wire taking-up wheel for driving its rotation. Among them, the motor one and the motor two are respectively fixed at the upper and lower parts inside the gantry. The electrode wire is released from the wire releasing wheel and, after passing through two wire guiding nozzles in sequence, is wound up by the wire taking-up wheel.

[0009] As a preferred solution of the gantry wire cutting machine of the present invention, wherein: the discharge component includes a linear module, the upper and lower ends of the linear module are respectively fixedly connected to the middle parts of two support arms, and one end of the extension arm is fixedly installed on the slider of the linear module.

[0010] As a preferred solution of the gantry wire cutting machine of the present invention, wherein: the pressing component further includes a top rod fixed above and below the extension arm, and an electric cylinder fixed to the side of the extension arm. Among them, the two pressing wheels rotate above and below the telescopic rod of the electric cylinder respectively, and the horizontal positions of the two pressing wheels are respectively located between the two top rods and the conductive block.

[0011] As a preferred solution of the gantry wire cutting machine of the present invention, wherein: the pressing component further includes a pressure sensor fixed inside the fork for detecting the pressure when the conductive block is pressed by the electrode wire.

[0012] As a preferred solution of the gantry wire cutting machine of the present invention, wherein: the support component further includes a processing groove, and the gantry is fixed to one side of the top of the processing groove.

[0013] As a preferred solution of the gantry wire cutting machine of the present invention, wherein: it further includes a clamping component, which includes a processing table fixed inside the processing groove. The processing table covers the top of the lower wire guiding nozzle, and the top plane of the processing table is flush with the top port of the lower wire guiding nozzle.

[0014] As a preferred embodiment of the gantry wire cutting machine of the present invention, the clamping assembly further includes ball screws rotatably disposed on both sides of the machining groove, a third motor connected to one end of the ball screw for driving its rotation, a moving seat fixed to the ball screw nut, a hydraulic cylinder fixed to the moving seat, a clamping block fixed to the piston rod of the hydraulic cylinder, and a guide rod slidably disposed inside the moving seat. Among them, the two third motors are fixedly installed on the side of the machining groove, the clamping block is connected to the positive electrode of the pulse power supply, and the guide rod is fixed to both sides of the top of the machining groove.

[0015] Beneficial effects of the gantry wire cutting machine of the present invention: The pressing wheel presses the electrode wire against the conductive block to connect the negative electrode of the pulse power supply. The height of the conductive block is adjusted adaptively according to the thickness of the workpiece so that it is close to the top of the workpiece. Compared with the prior art, the length of the discharging section of the electrode wire is greatly shortened. By combining the adjustment of the position of the conductive block with the control of the length of the discharging section of the electrode wire, the energy consumption is effectively reduced, and the complex electrode wire tension adjustment mechanism in the prior art is avoided, and the probability of wire breakage during the adjustment of the electrode wire is suppressed. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is an overall schematic diagram of the gantry wire cutting machine.

[0018] Figure 2 It is Figure 1 Another perspective schematic diagram of the structure in

[0019] Figure 3 It is an assembly schematic diagram of the wire feeding assembly of the gantry wire cutting machine.

[0020] Figure 4 It is an assembly schematic diagram of the discharging assembly of the gantry wire cutting machine.

[0021] Figure 5 It is Figure 4 An enlarged schematic diagram of the structure at A in

[0022] Figure 6 It is a schematic diagram of the fork and conductive block structure of the gantry wire cutting machine.

[0023] Figure 7 It is Figure 4 Another perspective schematic diagram of the structure in

[0024] Figure 8 It isFigure 7 Schematic enlarged view of the structure at B in the [Chinese context].

[0025] Figure 9 Simplified schematic view of the prior art structure described in the embodiment.

[0026] Figure 10 Assembly schematic view of the clamping component of a gantry wire cutting machine.

[0027] In the figure: 100, support component; 200, wire feeding component; 300, discharge component; 400, pressing component; 500, clamping component; 101, gantry; 102, support arm; 103, processing groove; 201, wire feeding wheel; 202, motor one; 203, wire take-up wheel; 204, motor two; 205, wire guide nozzle; 206, electrode wire; 301, linear module; 302, extension arm; 303, servo; 304, fork; 305, conductive block; 401, ejector rod; 402, electric cylinder; 403, pressing wheel; 404, pressure sensor; 501, processing table; 502, ball screw; 503, motor three; 504, moving seat; 505, guide rod; 506, hydraulic cylinder; 507, clamping block. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0029] Refer to Figures 1 - 2 , which is an embodiment of the present invention. This embodiment provides a gantry wire cutting machine, including a support component 100, which serves as the support chassis of the entire device. It includes a gantry 101 and support arms 102 fixed to the upper and lower sides of the side of the gantry 101. It also includes a processing groove 103. The gantry 101 is fixed to one side of the top of the processing groove 103. In this embodiment, the processing groove 103 serves as the base of the processing machine tool. It is surrounded by a fence and provided with drainage holes at the bottom. The purpose is that during the processing of the wire cutting equipment, deionized water or processing emulsion needs to be sprayed in the electric discharge area. On the one hand, it serves the purpose of cooling and chip removal. On the other hand, especially when spraying deionized water, it also serves as a conductive channel to facilitate the normal formation of the circuit loop. Therefore, the above design is for discharging the processing waste liquid, which belongs to the existing mature technology and will not be elaborated here.

[0030] Further, refer to Figures 1 - 3, the gantry wire cutting machine further includes a wire feeding assembly 200, which includes a wire guide nozzle 205 fixed to one end of two support arms 102, and an electrode wire 206 that sequentially passes through the upper and lower wire guide nozzles 205 and can be conveyed. Further, the wire feeding assembly 200 also includes a wire releasing wheel 201 fixed above the interior of the gantry 101, a wire winding wheel 203 fixed below the interior of the gantry 101, a motor one 202 connected to one end of the wire releasing wheel 201 for driving its rotation, and a motor two 204 connected to one end of the wire winding wheel 203 for driving its rotation. Among them, the motor one 202 and the motor two 204 are respectively fixed at the upper and lower parts inside the gantry 101. The electrode wire 206 is released from the wire releasing wheel 201 and, after sequentially passing through the two wire guide nozzles 205, is wound by the wire winding wheel 203.

[0031] In this embodiment, the wire releasing wheel 201 and the wire winding wheel 203 are equivalent to the wire storage cylinder in the prior art. Their main functions are to release and collect the electrode wire 206. In the wire cutting equipment, due to the very small designed diameter of the electrode wire 206 and being in a high-temperature environment during the discharge operation, for the stable conductivity of the electrode wire 206, it is necessary for it to be in a continuously conveyed state so that new electrode wire 206 can enter the discharge section at all times. Specifically in this embodiment, the two are respectively driven by the motor one 202 and the motor two 204. When driving, attention should be paid to the speed relationship between the two to avoid the speed mismatch between the receiving and releasing ends, which may cause the electrode wire 206 to break due to excessive tension or the electrode wire 206 not being tightened due to too small a tension, resulting in the shaking of the electrode wire 206 and affecting the normal progress of processing.

[0032] Refer to Figure 3 , in order to further ensure the stable conveyance of the electrode wire 206, several guide wheels are additionally provided between the wire releasing wheel 201 and the upper wire guide nozzle 205, and between the wire winding wheel 203 and the lower wire guide nozzle 205. This also belongs to the common and mature technology in this field and will not be elaborated too much here.

[0033] Further, refer to Figures 4 - 6 , the gantry wire cutting machine further includes a discharge assembly 300, which includes an extension arm 302 that can translate vertically, a steering gear 303 fixed to one end of the extension arm 302, a fork 304 fixed to the rotating shaft of the steering gear 303, and a conductive block 305 that slides axially along the rotating shaft of the steering gear 303 within the fork 304. The conductive block 305 is connected to the negative pole of the pulse power supply.

[0034] It should be noted that the fork 304 must be made of insulating material to maintain the insulation between the conductive block 305 and the extension arm 302.

[0035] Furthermore, in the present embodiment, the discharge assembly 300 includes a linear module 301, the upper and lower ends of the linear module 301 are respectively fixedly connected to the middle of the two support arms 102, and one end of the extension arm 302 is fixedly mounted on the slider of the linear module 301. The linear module 301 is a common linear motion module, which is a mechanical transmission component for realizing linear reciprocating motion, mainly composed of a guide rail, a slider, and a driving motor, etc. The slider is driven by a motor to perform high-precision and high-speed linear motion along the guide rail. It is selected as the lifting power source of the extension arm 302 in the present device, focusing on its compact structure, precise positioning, and smooth operation.

[0036] Wire cutting equipment is a precision machining equipment based on the principle of electrospark machining. Its core principle is: using the high-frequency pulse discharge generated between a thin metal wire (such as molybdenum wire or copper wire, as a tool electrode) and a workpiece to erode the metal material through the instantaneous high temperature during the discharge. During machining, the metal wire (specifically, the electrode wire 206 in this embodiment) is connected to the negative electrode of the pulse power supply, and the workpiece is connected to the positive electrode. A small gap is maintained between the two, and the gap is filled with a working fluid (such as deionized water or emulsion) with insulating, cooling and chip removal functions. The wire feeding system controls the electrode wire 206 to move back and forth or unidirectionally between the two wire nozzles 205. At the same time, the workpiece is linked in a horizontal plane so that the discharge continues to occur at the edge of the moving path of the electrode wire 206, thereby gradually etching the workpiece material and finally cutting out parts of the desired shape.

[0037] In this embodiment, refer to Figure 4 A hose for discharging the working fluid is also fixed on the extension arm 302. As for the working fluid pumping equipment connected to the hose, this is a mature product under the existing technology and will not be described in detail here.

[0038] When the device is working, the extension arm 302 is lifted to a suitable height through the linear module 301, and then the negative pole of the pulse power supply is indirectly connected to the electrode wire 206 through the contact between the conductive block 305 and the electrode wire 206. Furthermore, since the electrode wire 206 is always in a conveyed state, when it contacts with the conductive block 305, long-term friction will cause wear of the conductive block 305, thereby affecting the conductive stability. In this embodiment, the fork frame 304 on its rotating shaft is driven by the servo 303 to rotate slowly, thereby driving the conductive block 305 inside the fork frame 304 to rotate slowly, thereby avoiding the situation where the conductive block 305 is always worn at the same position, thereby extending its service life.

[0039] Further, refer to Figures 7 - 8 The gantry-type wire cutting machine also includes a pressing component 400 , which includes a pressing wheel 403 disposed above and below the opposite side of the conductive block 305 , and the pressing wheel 403 can move along the sliding direction of the conductive block 305 .

[0040] In this device, in order to improve the effective contact between the electrode wire 206 and the conductive block 305, a pressing wheel 403 that can move along the sliding direction of the conductive block 305 is specially designed, so as to press the electrode wire 206 on the conductive block 305 to ensure conduction with the power supply.

[0041] Referring to Figure 9 , in the prior art, the conductive block 305 is usually fixed on the support arm 102. Although it has the ability of fine position adjustment, it is mostly to avoid the electrode wire 206 continuously wearing the same position, which affects the conductive stability of the conductive block 305. Its position relative to the electrode wire 206 does not change much as a whole. This makes the discharge section length of the electrode wire 206 still very long (the discharge section is the distance from the position where the electrode wire 206 cooperates with the conductive block 305 to the position where it cooperates with the workpiece, that is, the sum of the X section and the Y section in the figure). Since the electrode wire 206 and the workpiece are in the on - conducting circuit loop during processing, the section of the discharge section that cooperates with the workpiece, that is, the Z section in the figure, belongs to the necessary conducting section, and the section of the discharge section that does not cooperate with the workpiece, that is, the remaining part of the Y section after removing the Z section plus the X section, belongs to the unnecessary conducting section. In this way, there is an unnecessary wire loss situation, undoubtedly increasing the energy consumption.

[0042] When the pressing wheel 403 presses the electrode wire 206 on the conductive block 305 to connect the negative pole of the pulsed power supply, the height of the conductive block 305 is adjusted adaptively according to the workpiece thickness to make it close to the top of the workpiece, shortening the discharge section length of the electrode wire 206. Combining the position adjustment of the conductive block 305 and the control of the discharge section length effectively reduces the energy consumption, and also avoids the complex electrode wire 206 tension adjustment mechanism, suppressing the probability of wire breakage when the electrode wire 206 is adjusted.

[0043] Furthermore, referring to Figures 7 - 8 , the pressing assembly 400 further includes a top rod 401 fixed above and below the extension arm 302, and an electric cylinder 402 fixed on the side of the extension arm 302. Among them, the two pressing wheels 403 rotate above and below the telescopic rod of the electric cylinder 402 respectively, and the horizontal positions of the two pressing wheels 403 are respectively located between the two top rods 401 and the conductive block 305. The pressing assembly 400 further includes a pressure sensor 404 fixed inside the fork 304, which is used to detect the pressure when the conductive block 305 is pressed by the electrode wire 206.

[0044] In this embodiment, when the two pressing wheels 403 move towards the conductive block 305 and squeeze the electrode wire 206 against the conductive block 305, in order to prevent the upper and lower parts of this section of the electrode wire 206 from deviating from the cavity center of the wire nozzle 205 and thus rubbing against the cavity wall of the wire nozzle 205, when the pressing wheel 403 squeezes the electrode wire 206 to bend it, through the restriction of the ejector rod 401, the electrode wire 206 remains at the cavity center of the wire nozzle 205. This not only avoids unnecessary wear but also enables the electrode wire 206 in the discharge section to maintain a vertical state, which is beneficial to maintaining the flatness of the cutting surface and preventing wire breakage. By detecting the pressure on the conductive block 305 when it is pressed by the electrode wire 206 through the pressure sensor 404, on the one hand, it can ensure good electrical contact between the two, and at the same time, it can also reflect the tension state of the electrode wire 206 and suppress the tremor during its discharge.

[0045] Further, referring to Figure 10 , the gantry wire cutting machine further includes a clamping assembly 500, which includes a processing table 501 fixed inside the processing groove 103. The processing table 501 covers the top of the lower wire nozzle 205, and the top plane of the processing table 501 is flush with the top port of the lower wire nozzle 205.

[0046] The clamping assembly 500 further includes ball screw rods 502 rotatably disposed on both sides of the processing groove 103, a motor three 503 connected to one end of the ball screw rod 502 for driving its rotation, a moving seat 504 fixed on the nut of the ball screw rod 502, a hydraulic cylinder 506 fixed on the moving seat 504, a clamping block 507 fixed on the piston rod of the hydraulic cylinder 506, and a guide rod 505 slidably disposed inside the moving seat 504. Among them, the two motors three 503 are fixedly installed on the side of the processing groove 103, the clamping block 507 is connected to the positive pole of the pulse power supply, and the guide rod 505 is fixed on both sides of the top of the processing groove 103.

[0047] In this embodiment, when the workpiece needs to be cut, first, the two hydraulic cylinders 506 drive the two clamping blocks 507 to move closer to each other to clamp the workpiece. When they come into contact, the workpiece can be indirectly conducted to the positive pole of the pulse power supply. When the gap between the electrode wire 206 and the workpiece reaches certain conditions, the working fluid is ionized to form a discharge channel, generating high temperature to melt the metal, thereby achieving cutting. Further, the motor three 503 drives the ball screw rod 502 to rotate, so that the moving seat 504 can move under the guiding and limiting action of the guide rod 505, and finally drives the workpiece to perform longitudinal translation on the processing table 501. By extending one of the two hydraulic cylinders 506 and shortening the other, the workpiece can be driven to perform lateral translation on the processing table 501. The combination of longitudinal translation and lateral translation can achieve arbitrary movement of the workpiece on the horizontal plane.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A gantry wire cutting machine, characterized in that: including, a support component (100), which includes a gantry (101) and support arms (102) fixed above and below the side of the gantry (101); a wire feeding component (200), which includes wire nozzles (205) fixed at one ends of two support arms (102), and an electrode wire (206) that sequentially passes through the upper and lower wire nozzles (205) and can be conveyed; a discharge component (300), which includes an extension arm (302) that can translate vertically, a servo motor (303) fixed at one end of the extension arm (302), a fork (304) fixed on the rotating shaft of the servo motor (303), and a conductive block (305) that slides axially along the rotating shaft of the servo motor (303) within the fork (304), and the conductive block (305) is connected to the negative pole of a pulse power supply; and a pressing component (400), which includes pressing wheels (403) arranged above and below the opposite side of the conductive block (305), and the pressing wheels (403) can move along the sliding direction of the conductive block (305); The pressing wheel (403) presses the electrode wire (206) against the conductive block (305) to connect it to the negative pole of the pulse power supply. The height of the conductive block (305) is adjusted adaptively according to the thickness of the workpiece to make it close to the top of the workpiece, shortening the length of the discharge section of the electrode wire (206) and reducing the energy consumption.

2. The gantry type wire cutting machine according to claim 1, characterized in that: The wire feeding component (200) further includes a wire releasing wheel (201) fixed above the inside of the gantry (101), a wire winding wheel (203) fixed below the inside of the gantry (101), a motor one (202) connected to one end of the wire releasing wheel (201) for driving its rotation, and a motor two (204) connected to one end of the wire winding wheel (203) for driving its rotation. Among them, the motor one (202) and the motor two (204) are respectively fixed at the upper and lower parts inside the gantry (101), and the electrode wire (206) is released from the wire releasing wheel (201) and is wound by the wire winding wheel (203) after sequentially passing through the two wire nozzles (205).

3. The gantry wire cutting machine according to claim 2, wherein: The discharge component (300) includes a linear module (301), the upper and lower ends of the linear module (301) are respectively fixedly connected to the middle parts of the two support arms (102), and one end of the extension arm (302) is fixedly installed on the slider of the linear module (301).

4. The gantry wire cutting machine according to claim 3, wherein: The pressing component (400) further includes ejector rods (401) fixed above and below the extension arm (302), and an electric cylinder (402) fixed on the side of the extension arm (302). Among them, the two pressing wheels (403) respectively rotate above and below the telescopic rod of the electric cylinder (402), and the horizontal positions of the two pressing wheels (403) are respectively located between the two ejector rods (401) and the conductive block (305).

5. The gantry wire cutting machine according to claim 4, characterized in that: The pressing component (400) further includes a pressure sensor (404) fixed inside the fork (304) for detecting the pressure when the conductive block (305) is pressed by the electrode wire (206).

6. The gantry type wire cutting machine according to claim 5, characterized in that: The support component (100) further includes a processing groove (103), and the gantry (101) is fixed on one side of the top of the processing groove (103).

7. The gantry type wire cutting machine according to claim 6, wherein: It further includes a clamping assembly (500), which includes a processing table (501) fixed inside the processing groove (103). The processing table (501) covers the top of the lower wire nozzle (205), and the top plane of the processing table (501) is flush with the top port of the lower wire nozzle (205).

8. The gantry type wire cutting machine according to claim 7, characterized in that: The clamping assembly (500) further includes ball screw rods (502) rotatably arranged on both sides of the processing groove (103), a third motor (503) connected to one end of the ball screw rod (502) for driving its rotation, a moving seat (504) fixed on the nut of the ball screw rod (502), a hydraulic cylinder (506) fixed on the moving seat (504), a clamping block (507) fixed on the piston rod of the hydraulic cylinder (506), and a guide rod (505) slidably arranged inside the moving seat (504). Among them, the two third motors (503) are fixedly installed on the side of the processing groove (103), the clamping block (507) is connected to the positive pole of the pulse power supply, and the guide rod (505) is fixed on both sides of the top of the processing groove (103).

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