Force feedback closed-loop control feeding device and electrochemical discharge machining device

Abstract

The utility model relates to the technical field of electrochemical discharge machining, in particular to a force feedback closed-loop control feeding device and an electrochemical discharge machining device, which comprise a rack, an electrolyte box, a vertical moving mechanism, a fixing frame, a force sensor, a lifting mechanism, a retainer, a tool electrode, an auxiliary electrode, a power supply and a controller, the force sensor and the lifting mechanism are both connected with the fixing frame, the holder is connected with the fixing frame in a sliding mode, the holder abuts against the force sensor, and the holder is connected with the output end of the lifting mechanism. By arranging the lifting mechanism, before machining is started, the lifting mechanism is started to drive the holder to move, the holder slides on the fixing frame, and the initial contact pressure of the holder to the force sensor is adjusted, so that the initial contact pressure of a tool electrode to the force sensor is conveniently adjusted, and machining errors are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrochemical discharge machining, more particularly to a force feedback closed loop control feeding device and electrochemical discharge machining device. BACKGROUND

[0002] Electrochemical discharge machining is a kind of mixed processing technology combined with electrochemistry and electric spark discharge principle, mainly used for processing conductive and non-conductive materials. In the feeding mode of electrochemical discharge machining, gravity feeding is the most widely used feeding mode, but a suitable force range needs to be selected, otherwise the bending of electrode is easily caused. This will cause the interruption of processing, and seriously affect the processing efficiency and processing quality of workpiece. The existing electrochemical discharge machining system usually adopts open loop control mode, which is difficult to monitor and adjust the feeding speed and pressure in real time in the processing process, affecting the stability and efficiency of processing.

[0003] The prior art discloses an electrochemical discharge machining device and method based on force feedback control feeding system, a tool electrode is fixed on the Z axis of the machine tool through a clamp, a force sensor is installed on the Z axis of the machine tool, the force sensor detects the contact force signal of the tool electrode and the workpiece, the signal is collected by a data acquisition card and connected to a numerical control system, and the numerical control system controls the feeding or back of electrochemical discharge machining according to the signal, so as to monitor and adjust the feeding speed and pressure in real time. However, before starting processing, the initial contact pressure of the tool electrode to the force sensor will affect the pressure detection during subsequent processing, and the processing error is large. The device is difficult to adjust the initial contact pressure of the tool electrode to the force sensor, and the processing error is large. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient that the prior art is difficult to adjust the initial contact pressure of the tool electrode to the force sensor and the processing error is large, providing a force feedback closed loop control feeding device and electrochemical discharge machining device, which is convenient for adjusting the initial contact pressure of the tool electrode to the force sensor and reducing the processing error.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] Provide a kind of force feedback closed loop control feeding device, including fixed frame, force sensor, lifting mechanism, retaining frame and controller, the force sensor and the lifting mechanism are connected with the fixed frame, the retaining frame is slidably connected with the fixed frame, the retaining frame is in abutment with the force sensor, the retaining frame is connected with the output end of the lifting mechanism, and the lifting mechanism is connected with the controller in communication.

[0007] The utility model discloses a force feedback closed loop control feeding device, before processing, starting lifting mechanism and drive retainer to move, make retainer slide on fixed frame, thereby make retainer contact to force sensor, through further adjustment lifting mechanism, adjust the initial contact pressure of force sensor to zero, realize force feedback closed loop control.

[0008] Further, the lifting mechanism includes a rotating motor, a pull rod, a first wire wheel, a second wire wheel and a transmission wire, the rotating motor is arranged on the fixed frame, the pull rod is connected with the output end of the rotating motor, the first wire wheel is connected on the pull rod, the second wire wheel is connected on the retainer, and the two ends of the transmission wire are wound on the first wire wheel and the second wire wheel respectively. When adjusting the lifting mechanism, the specific operation is to start the rotating motor, the rotating motor drives the pull rod to rotate, drives the first wire wheel to rotate, tightens the transmission wire, drives the second wire wheel to move towards the first wire wheel, drives the retainer to slide on the fixed frame, adjusts the initial contact pressure of the retainer to the force sensor, thereby facilitating the adjustment of the initial contact pressure of the tool electrode to the force sensor.

[0009] The utility model discloses an electrochemical discharge machining device, including frame, electrolyte tank, vertical movement mechanism, tool electrode, auxiliary electrode, power and above described force feedback closed loop control feeding device, electrolyte tank with vertical movement mechanism all are located on the frame, be equipped with fixed assembly in electrolyte tank, fixed frame with vertical movement mechanism output end is connected, tool electrode with retainer is connected, auxiliary electrode is located in electrolyte tank, the both ends of power are connected with auxiliary electrode and tool electrode electricity respectively, vertical movement mechanism with controller communication connection.

[0010] The utility model discloses an electrochemical discharge machining device, the auxiliary electrode is placed in electrolyte tank, after installing the tool electrode on the holder, the power supply is connected with the tool electrode and auxiliary electrode respectively, before processing, the force feedback closed loop control feeding device is started, and the initial contact pressure of force sensor is adjusted to zero. After adjusting, the vertical moving mechanism is started to make the tool electrode contact the workpiece in electrolyte tank, and the processing is carried out, and the pressure value of force sensor is fed back to the controller in real time during processing, and the controller controls the vertical moving mechanism according to the real-time pressure value, thereby realizing the force feedback closed loop control feeding of electrochemical discharge machining. Through the setting of the lifting mechanism, before processing, the lifting mechanism is started to drive the tool electrode, the holder is slid on the fixed frame, and the initial contact pressure of the holder to the force sensor is adjusted, thereby facilitating the adjustment of the initial contact pressure of the tool electrode to the force sensor and reducing the processing error.

[0011] Further, the guiding assembly is arranged on the fixed frame, and the tool electrode is connected with the guiding assembly. By arranging the guiding assembly, the movement of the tool electrode is guided when adjusting the initial contact pressure of the tool electrode and the force sensor, avoiding the deviation of the tool electrode during adjustment.

[0012] Further, the guiding assembly comprises a guiding frame, a guiding column and a guiding plate, the guiding frame is arranged on the fixed frame, the tool electrode is arranged on the guiding frame, the guiding column is arranged on the guiding frame, the guiding plate is connected with the tool electrode, and the guiding column is arranged on the guiding plate. When guiding the tool electrode, the tool electrode is preliminarily guided by the guiding frame, and then the tool electrode is secondarily guided by the guiding plate in the movement of the guiding column, thereby avoiding the deviation of the tool electrode during adjustment.

[0013] Further, the rotating mechanism is arranged on the fixed frame, the tool electrode is connected with the output end of the rotating mechanism, and the tool electrode is rotationally connected with the holder. When processing, the rotating mechanism drives the tool electrode to rotate, thereby enhancing the uniformity and efficiency of material removal during processing.

[0014] Further, the rotating mechanism comprises a rotating motor and a transmission assembly, the rotating motor is arranged on the fixed frame, and the output end of the rotating motor and the tool electrode are drivingly connected through the transmission assembly. The rotating motor drives the tool electrode to rotate through the transmission assembly, thereby making the rotation of the tool electrode more stable.

[0015] Further, the transmission assembly comprises a first pulley, a second pulley and a transmission belt, the first pulley is connected with the rotary motor output end, the second pulley is connected with the tool electrode, and the first pulley and the second pulley are transmissionally connected through the transmission belt.

[0016] Further, a horizontal moving mechanism is further included, the horizontal moving mechanism is arranged on the frame, and the electrolyte tank is connected with the horizontal moving mechanism output end.

[0017] Further, the horizontal moving mechanism comprises an X-axis moving mechanism and a Y-axis moving mechanism, the X-axis moving mechanism is arranged on the frame, the Y-axis moving mechanism is connected with the X-axis moving mechanism output end, and the electrolyte tank is connected with the Y-axis moving mechanism output end.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] 1. The force feedback closed-loop control feeding device and the electrochemical discharge machining device, by setting the lifting mechanism, before starting machining, the lifting mechanism is started to drive the tool electrode to move, the retainer slides on the fixed frame, so that the initial contact pressure of the retainer to the force sensor is adjusted, and the machining error is reduced.

[0020] 2. The force feedback closed-loop control feeding device and the electrochemical discharge machining device, by setting the guide assembly, when the initial contact pressure of the tool electrode and the force sensor is adjusted, the movement of the tool electrode is guided, and the tool electrode is prevented from deviating during adjustment.

[0021] 3. The force feedback closed-loop control feeding device and the electrochemical discharge machining device, by setting the rotating mechanism, when machining, the rotating mechanism drives the tool electrode to rotate, and the uniformity and efficiency of material removal during machining are enhanced. DRAWINGS

[0022] Figure 1 is the structural schematic diagram of the force feedback closed-loop control feeding device;

[0023] Figure 2 is the structural schematic diagram of the electrochemical discharge machining device;

[0024] Figure 3 is a structural schematic diagram of a tool electrode mounted on a force feedback closed-loop control feeding device;

[0025] Figure 4 is a structural schematic diagram of a vertical moving mechanism and a horizontal moving mechanism.

[0026] In the drawings: 100, force feedback closed-loop control feeding device; 110, fixed frame; 120, force sensor; 130, lifting mechanism; 131, rotating motor; 132, pull rod; 133, first wire wheel; 134, second wire wheel; 140, holding frame; 150, controller; 200, rack; 300, electrolyte tank; 310, fixed assembly; 400, vertical moving mechanism; 500, tool electrode; 600, auxiliary electrode; 700, guiding assembly; 710, guiding frame; 720, guiding column; 730, guiding plate; 800, rotating mechanism; 810, rotating motor; 820, transmission assembly; 821, first pulley; 822, second pulley; 900, horizontal moving mechanism; 910, X-axis moving mechanism; 920, Y-axis moving mechanism. DETAILED DESCRIPTION

[0027] The utility model will be further explained in connection with specific embodiments. Among them, the drawings are only used for example description, and the representation is only a schematic diagram, and cannot be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, some well-known structures and their description in the drawings can be omitted.

[0028] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the position relationship description in the drawings is only used for example description, and cannot be understood as the limitation of the patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.In addition, if the description of "first", "second" etc. is involved in the embodiments of the utility model, the description of "first", "second" etc. is only for the description purpose, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature.

[0029] Embodiment one

[0030] This embodiment is a first embodiment of a force feedback closed-loop control feed device 100, such as... Figure 1 As shown, the device includes a fixed frame 110, a force sensor 120, a lifting mechanism 130, a retainer 140, and a controller 150. The force sensor 120 and the lifting mechanism 130 are both connected to the fixed frame 110. The retainer 140 is slidably connected to the fixed frame 110. Specifically, the fixed frame 110 has a miniature slide rail, and the retainer 140 has a slider connected to it. The slider is slidably connected to the slide rail in a vertical direction. The retainer 140 abuts against the force sensor 120 and is connected to the output end of the lifting mechanism 130. The lifting mechanism 130 is communicatively connected to the controller 150.

[0031] The lifting mechanism 130 includes a rotary motor 131, a pull rod 132, a first sheave 133, a second sheave 134, and a transmission line. The rotary motor 131 is mounted on the fixed frame 110. The pull rod 132 is connected to the output end of the rotary motor 131. The first sheave 133 is connected to the pull rod 132, and the second sheave 134 is connected to the retainer 140. The two ends of the transmission line are respectively wound around the first sheave 133 and the second sheave 134. When adjusting the lifting mechanism 130, the specific operation is as follows: the rotary motor 131 is started, driving the pull rod 132 to rotate, which in turn drives the first sheave 133 to rotate, tightening the transmission line. This causes the second sheave 134 to move towards the first sheave 133, causing the retainer 140 to slide on the fixed frame 110, adjusting the initial contact pressure of the retainer 140 on the force sensor 120, thereby facilitating the adjustment of the initial contact pressure of the tool electrode 500 on the force sensor 120.

[0032] The working principle of the force feedback closed-loop control feed device in this embodiment is as follows:

[0033] Before machining begins, the lifting mechanism 130 is activated to move the retainer 140, allowing it to slide on the fixed frame 110. This brings the retainer 140 into contact with the force sensor 120. By further adjusting the lifting mechanism 130, the initial contact pressure of the force sensor 120 is adjusted to zero, achieving force feedback closed-loop control. By setting up the lifting mechanism 130, before machining begins, the tool electrode 500 is activated, and the retainer 140 slides on the fixed frame 110, adjusting the initial contact pressure of the retainer 140 on the force sensor 120. This facilitates adjusting the initial contact pressure of the retainer 140 on the force sensor 120, reducing machining errors.

[0034] Example 2

[0035] This embodiment is a first embodiment of an electrochemical discharge machining device, such as... Figure 2 and Figure 3As shown, including rack 200, electrolyte tank 300, vertical movement mechanism 400, tool electrode 500, auxiliary electrode 600, power supply and force feedback closed-loop control feeding device 100 of embodiment one, electrolyte tank 300 and vertical movement mechanism 400 are arranged on rack 200, as shown Figure 3 As shown, the electrolyte tank 300 is provided with a fixing assembly 310, which is used to fix the workpiece to avoid the movement of the workpiece affecting the machining effect during machining. The fixing assembly 310 can be a base and two clamping plates. The workpiece is located between the clamping plates and the base, and the clamping plates are fixedly connected to the base by bolts.

[0036] As shown Figure 2 The fixed frame 110 is connected to the output end of the vertical movement mechanism 400, and the tool electrode 500 is connected to the retaining frame 140. In order to make the pressure detection more accurate, the retaining frame 140 is connected to the end of the tool electrode 500, and the retaining frame 140 abuts against the force sensor 120. The abutment is in the vertical direction, that is, the force sensor 120, the retaining frame 140, the tool electrode 500 and the workpiece are arranged in sequence in the vertical direction. A linear spring can also be provided, and the retaining frame 140 and the linear spring are in direct contact with the force sensor 120. At the same time, in order to fix the tool electrode 500 more stably, a balance plate is arranged at the middle part of the tool electrode 500, which is used to fix and protect the middle part of the tool electrode 500, avoiding the tool electrode 500 from breaking at the middle part. The output end of the vertical movement mechanism 400 can also be connected to the balance plate. The auxiliary electrode 600 is located in the electrolyte tank 300, which contains electrolyte. The auxiliary electrode 600, the tool electrode 500 and the workpiece are immersed in the electrolyte during machining. The two ends of the power supply are electrically connected to the auxiliary electrode 600 and the tool electrode 500, respectively. Specifically, the positive electrode of the power supply is electrically connected to the tool electrode 500, and the negative electrode of the power supply is electrically connected to the auxiliary electrode 600. The tool electrode 500 and the auxiliary electrode 600 form an electrochemical discharge circuit through the electrolyte, and the tool electrode 500 performs electrochemical discharge machining by applying voltage through the power supply. The power supply uses a pulse power supply, and the vertical movement mechanism 400 is in communication connection with the controller 150.

[0037] As shown Figure 2 It also includes a guide assembly 700 arranged on the fixed frame 110, and the tool electrode 500 is connected to the guide assembly 700. By arranging the guide assembly 700, the movement of the tool electrode 500 is guided when adjusting the initial contact pressure of the tool electrode 500 and the force sensor 120, avoiding the tool electrode 500 from deviating during adjustment. At the same time, the guide assembly 700 can also support the tool electrode 500 during machining, avoiding the tool electrode 500 from deviating.

[0038] As shown Figure 2As shown, it also includes a rotating mechanism 800, which is arranged on the fixed frame 110, the tool electrode 500 is connected with the output end of the rotating mechanism 800, and the tool electrode 500 is rotationally connected with the holding frame 140. The rotational connection can be achieved in various ways, including but not limited to through a ball bearing or through a bearing. When machining, the rotating mechanism 800 drives the tool electrode 500 to rotate, thereby enhancing the uniformity and efficiency of material removal during machining.

[0039] As shown, it also includes a rotating mechanism 800, which is arranged on the fixed frame 110, the tool electrode 500 is connected with the output end of the rotating mechanism 800, and the tool electrode 500 is rotationally connected with the holding frame 140. The rotational connection can be achieved in various ways, including but not limited to through a ball bearing or through a bearing. When machining, the rotating mechanism 800 drives the tool electrode 500 to rotate, thereby enhancing the uniformity and efficiency of material removal during machining. Figure 2 As shown, it also includes a horizontal moving mechanism 900, which is arranged on the rack 200, and the electrolyte tank 300 is connected with the output end of the horizontal moving mechanism 900. The workpiece is moved horizontally by the horizontal moving mechanism 900, thereby facilitating the machining of the workpiece. Meanwhile, the horizontal moving mechanism 900 is arranged below, and the vertical moving mechanism 400 is arranged above, so as to lower the center of gravity of the entire device, reduce the load above the device, and make the device more stable.

[0040] The working principle of the electrochemical discharge machining device of the embodiment is as follows:

[0041] The auxiliary electrode 600 is placed in the electrolyte tank 300, the tool electrode 500 is installed on the holding frame 140, and the power supply is connected with the tool electrode 500 and the auxiliary electrode 600, respectively. Before machining, the lifting mechanism 130 is started to drive the tool electrode 500 to move and drive the holding frame 140 to slide on the fixed frame 110, so that the holding frame 140 contacts the force sensor 120. The guiding assembly 700 guides the tool electrode 500 during adjustment to avoid the tool electrode 500 from being skewed during adjustment. The initial contact pressure of the force sensor 120 is adjusted to zero by further adjusting the lifting mechanism 130. After adjustment, the workpiece is installed in the electrolyte tank 300 through the fixing assembly 310, the horizontal moving mechanism 900 is started to move the workpiece, the tool electrode 500 is located at the position required for machining the workpiece, the vertical moving mechanism 400 is started to make the tool electrode 500 contact the workpiece in the electrolyte tank 300, and machining is performed. The tool electrode 500 is rotated by starting the rotating mechanism 800 during machining, and the pressure value of the force sensor 120 is fed back to the controller in real time during machining, and the controller controls the vertical moving mechanism according to the real-time pressure value, thereby realizing force feedback closed-loop control feeding of electrochemical discharge machining. By arranging the lifting mechanism 130, the tool electrode 500 is driven to work by starting the lifting mechanism 130 before machining, the holding frame 140 slides on the fixed frame 110, and the initial contact pressure of the holding frame 140 to the force sensor 120 is adjusted, thereby facilitating the adjustment of the initial contact pressure of the tool electrode 500 to the force sensor 120 and reducing machining errors.

[0042] Embodiment three

[0043] The second embodiment of the electrochemical discharge machining device is similar to the second embodiment, except that, as shown in Figure 3 The guide assembly 700 includes a guide frame 710, guide posts 720 and a guide plate 730. The guide frame 710 is arranged on the fixed frame 110, and the tool electrode 500 is arranged on the guide frame 710. Specifically, the guide frame 710 is provided with a first guide hole, and the tool electrode 500 is located in the first guide hole. The inner diameter of the first guide hole is equal to the outer diameter of the tool electrode 500. The guide posts 720 are arranged on the guide frame 710, and the guide plate 730 is connected with the tool electrode 500. The guide posts 720 are arranged on the guide plate 730. Specifically, the guide plate 730 is provided with a second guide hole, and the guide posts 720 are located in the second guide hole. Two guide posts 720 are symmetrically arranged on both sides of the tool electrode 500.

[0044] When the tool electrode 500 is guided, the tool electrode 500 moves in the first guide hole, and the guide frame 710 preliminarily guides the tool electrode 500. At the same time, the tool electrode 500 drives the guide plate 730 to move, and the guide plate 730 slides on the guide posts 720 through the second guide hole. The guide plate 730 is guided again through the movement of the guide plate 730 on the guide posts 720, so as to avoid the deviation of the tool electrode 500 during adjustment.

[0045] Embodiment four

[0046] The third embodiment of the electrochemical discharge machining device is similar to the second embodiment, except that, as shown in Figure 3 The rotating mechanism 800 includes a rotating motor 810 and a transmission assembly 820. The rotating motor 810 is arranged on the fixed frame 110, and the output end of the rotating motor 810 and the tool electrode 500 are drivingly connected through the transmission assembly 820. The rotating speed of the rotating motor 810 can be adjusted according to the machining requirement, so that the ideal effect can be achieved in the machining of different materials and shapes. The rotating motor 810 drives the tool electrode 500 to rotate through the transmission assembly 820, so that the rotation of the tool electrode 500 is more stable.

[0047] The tool electrode 500 is provided with a rotating ball at the end, and the rotating ball is located in the retainer 140 and is drivingly connected with the retainer 140. The tool electrode 500 is drivingly connected with the balance plate through the conductive bearing, and the positive electrode of the power supply is electrically connected with the tool electrode 500 through the conductive bearing.

[0048] The transmission assembly 820 comprises a first pulley 821, a second pulley 822 and a transmission belt, the first pulley 821 is connected with the output end of the rotary motor 810, the second pulley 822 is connected with the tool electrode 500, and the first pulley 821 and the second pulley 822 are connected through the transmission belt. The rotary motor 810 drives the first pulley 821 to rotate, and drives the second pulley 822 to rotate through the transmission belt, thereby driving the tool electrode 500 to rotate.

[0049] Embodiment five

[0050] This embodiment is a fourth embodiment of the electrochemical discharge machining device, which is similar to the second embodiment, and the difference is that, as shown in the figure, Figure 4 The horizontal moving mechanism 900 comprises an X-axis moving mechanism 910 and a Y-axis moving mechanism 920, the X-axis moving mechanism 910 is arranged on the rack 200, the Y-axis moving mechanism 920 is connected with the output end of the X-axis moving mechanism 910, and the electrolyte tank 300 is connected with the output end of the Y-axis moving mechanism 920. The workpiece moves on the X-axis through the X-axis moving mechanism 910, and moves on the Y-axis through the Y-axis moving mechanism 920.

[0051] In this embodiment, the vertical moving mechanism 400, the X-axis moving mechanism 910 and the Y-axis moving mechanism 920 all use linear motors, the specific structure of the linear motor is that the output end of the stepping motor is connected with a screw rod, a sliding block is slidingly connected with an optical axis, and the sliding block is threadedly connected with the screw rod. When moving, the stepping motor drives the screw rod to rotate, thereby driving the sliding block to move.

[0052] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0053] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or changes can be made. Here, it is not necessary and impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A force feedback closed loop control feeding device (100), characterized in that, The force feedback closed-loop control feeding device (100) comprises a fixing frame (110), a force sensor (120), a lifting mechanism (130), a holding frame (140) and a controller (150), the force sensor (120) and the lifting mechanism (130) are connected with the fixing frame (110), the holding frame (140) is slidably connected with the fixing frame (110), the holding frame (140) abuts against the force sensor (120), the holding frame (140) is connected with the output end of the lifting mechanism (130), and the lifting mechanism (130) is connected with the controller (150) in communication.

2. The force feedback closed loop control feeding device (100) according to claim 1, characterized in that The lifting mechanism (130) comprises a rotating motor (131), a pull rod (132), a first wire wheel (133), a second wire wheel (134) and a transmission wire, the rotating motor (131) is arranged on the fixing frame (110), the pull rod (132) is connected with the output end of the rotating motor (131), the first wire wheel (133) is connected on the pull rod (132), the second wire wheel (134) is connected on the holding frame (140), and the two ends of the transmission wire are wound on the first wire wheel (133) and the second wire wheel (134) respectively.

3. An electrochemical discharge machining apparatus characterized by comprising: The force feedback closed-loop control feeding device (100) comprises a fixing frame (110), a force sensor (120), a lifting mechanism (130), a holding frame (140) and a controller (150), the force sensor (120) and the lifting mechanism (130) are connected with the fixing frame (110), the holding frame (140) is slidably connected with the fixing frame (110), the holding frame (140) abuts against the force sensor (120), the holding frame (140) is connected with the output end of the lifting mechanism (130), and the lifting mechanism (130) is connected with the controller (150) in communication.

4. The electrochemical discharge machining device according to claim 3, wherein The force feedback closed-loop control feeding device (100) further comprises a guide assembly (700), the guide assembly (700) is arranged on the fixing frame (110), and the tool electrode (500) is connected with the guide assembly (700).

5. The electrochemical discharge machining device according to claim 4, wherein The guide assembly (700) comprises a guide frame (710), a guide column (720) and a guide plate (730), the guide frame (710) is arranged on the fixing frame (110), the tool electrode (500) is arranged on the guide frame (710), the guide column (720) is arranged on the guide frame (710), the guide plate (730) is connected with the tool electrode (500), and the guide column (720) is arranged on the guide plate (730).

6. The electrochemical discharge machining device according to claim 3, wherein Further comprising a rotating mechanism (800) arranged on the fixed frame (110), the tool electrode (500) is connected with an output end of the rotating mechanism (800), and the tool electrode (500) is rotationally connected with the holding frame (140).

7. The electrochemical discharge machining device according to claim 6, wherein The rotating mechanism (800) comprises a rotating motor (810) and a transmission assembly (820), the rotating motor (810) is arranged on the fixed frame (110), and an output end of the rotating motor (810) is drivingly connected with the tool electrode (500) through the transmission assembly (820).

8. The electrochemical discharge machining device according to claim 7, wherein The transmission assembly (820) comprises a first belt pulley (821), a second belt pulley (822) and a transmission belt, the first belt pulley (821) is connected with the output end of the rotating motor (810), the second belt pulley (822) is connected with the tool electrode (500), and the first belt pulley (821) and the second belt pulley (822) are drivingly connected through the transmission belt.

9. The electrochemical discharge machining device according to any one of claims 3 to 8, characterized in that, Further comprising a horizontal moving mechanism (900) arranged on the rack (200), and the electrolyte tank (300) is connected with an output end of the horizontal moving mechanism (900).

10. The electrochemical discharge machining device according to claim 9, wherein The horizontal moving mechanism (900) comprises an X-axis moving mechanism (910) and a Y-axis moving mechanism (920), the X-axis moving mechanism (910) is arranged on the rack (200), the Y-axis moving mechanism (920) is connected with an output end of the X-axis moving mechanism (910), and the electrolyte tank (300) is connected with an output end of the Y-axis moving mechanism (920).

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