Low-speed wire feeding machine tool for machining high-precision mold

Abstract

The low-speed wire feeding machine tool comprises a machine tool body, a wire feeding mechanism and a workpiece clamp, a workbench is fixedly installed on the machine tool body, the wire feeding mechanism is installed on the top of the machine tool body, the workpiece clamp is arranged on the workbench of the machine tool body, and a clamp base is installed on the workbench; the workpiece clamp comprises an adjustable positioning assembly which is arranged on a clamp base and used for providing a reference for the position of a workpiece for positioning; the self-adaptive clamping assemblies are symmetrically arranged on the two sides of the top of the clamp base; the adjustable positioning assembly drives a positioning sliding block to slide along a positioning sliding groove through a positioning screw rod, and the position of the positioning sliding block can be accurately adjusted in cooperation with a dial with angle scales. A laser displacement sensor of the real-time positioning detection assembly can detect the position of a workpiece in real time, a signal indicating lamp emits green light when the workpiece is qualified, and an alarm is given when the workpiece is abnormal, the workpiece positioning precision is doubly guaranteed, manual calibration errors are avoided, and a reliable reference is provided for high-precision mold machining.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold processing, in particular to a slow wire machine tool for processing high-precision molds. BACKGROUND

[0002] In the field of high-precision mold processing, slow wire machine tools have become core equipment due to their high-precision cutting advantages, and the positioning accuracy, clamping stability, temperature control during processing, and fixture disassembly efficiency of the workpiece directly determine the mold processing precision and production efficiency. As the precision requirements of molds continue to increase, it is necessary to have a tooling system with precise positioning, self-adaptive clamping, real-time monitoring, and convenient maintenance functions to meet the processing needs of high precision and high efficiency. The existing slow wire machine tool supporting fixtures have many shortcomings: positioning relies heavily on manual calibration, which is low in precision and time-consuming, and cannot meet the needs of high-precision mold processing; the clamping device is fixed in pressure, which can easily damage the workpiece due to excessive pressure or cause displacement due to insufficient pressure; there is a lack of effective cooling during processing, which affects the precision due to thermal deformation of the workpiece and fixture; at the same time, the fixture disassembly process is complicated, and a lot of time is wasted during maintenance, so the overall adaptability and practicality cannot meet the stringent requirements of high-precision mold processing. Therefore, a slow wire machine tool for processing high-precision molds is proposed. SUMMARY

[0003] To solve the problems of low positioning accuracy, time-consuming manual calibration, fixed clamping pressure that can easily damage the workpiece or cause displacement, lack of effective cooling during processing that can cause thermal deformation, and complicated fixture disassembly that affects maintenance efficiency of traditional slow wire machine tools, the present application provides a slow wire machine tool for processing high-precision molds.

[0004] The present application specifically adopts the following technical solutions to achieve the above-mentioned purposes: A slow wire machine tool for processing high-precision molds, comprising a machine tool body, a wire feeding mechanism, and a workpiece fixture, a workbench is fixedly installed on the machine tool body, the wire feeding mechanism is installed on the top of the machine tool body, and the workpiece fixture is arranged on the workbench of the machine tool body, a fixture base is installed on the workbench, and the workpiece fixture comprises: An adjustable positioning assembly is arranged on the fixture base and used to provide a reference for the position of the workpiece for positioning; A self-adaptive clamping assembly is symmetrically arranged on both sides of the top of the fixture base and used to clamp the workpiece; A real-time positioning detection assembly is arranged at the midpoint of the side of the fixture base away from the wire feeding mechanism; A quick disassembly assembly is arranged at the bottom of the fixture base, the fixture base and the workbench are quickly positioned by the quick disassembly assembly to facilitate installation and disassembly; A cooling assembly is integrated in the inside of the fixture base, and the cooling liquid flows in the fixture base through the cooling assembly to cool the fixture and the workpiece.

[0005] Preferably, the adjustable positioning assembly comprises a positioning slider, a positioning screw and a scale disc, the clamp base is provided with a positioning sliding groove extending along the length direction of the clamp base, the positioning slider is slidingly embedded in the positioning sliding groove, the positioning screw is arranged along the length direction of the positioning sliding groove, one end of the positioning screw penetrates through the positioning slider and is rotationally installed in the inner wall of the positioning sliding groove, the other end of the positioning screw penetrates through the side wall of the clamp base and is connected with the scale disc, and the outer periphery of the scale disc is provided with a 0-360° angle scale.

[0006] Preferably, the outer periphery of the positioning screw is provided with external threads, and the positioning screw is threadedly connected with the positioning slider.

[0007] Preferably, the self-adaptive clamping assembly comprises a clamping cylinder, a pressure sensor, an elastic pressure head and a controller, the clamping cylinder is bolted to the clamp base through a cylinder support, the piston rod end of the clamping cylinder is fixedly connected with the elastic pressure head, and the controller is fixed to the side surface of the clamp base through screws.

[0008] Preferably, the input end of the controller is electrically connected with the pressure sensor through wires, and the output end of the controller is electrically connected with the electromagnetic valve of the clamping cylinder through wires, so that the output pressure of the clamping cylinder can be adjusted according to the detection value of the pressure sensor.

[0009] Preferably, the real-time positioning detection assembly comprises a laser displacement sensor, a signal indicator and a detection support, the detection support is of an L-shaped structure and is fixed to the clamp base through bolts, the laser displacement sensor is fixed to the detection support through a flange, the detection end of the laser displacement sensor is vertically downward towards the upper surface of the mold blank, the signal indicator is clamped to the top of the detection support, and the laser displacement sensor and the signal indicator are both electrically connected with the controller through wires.

[0010] Preferably, the quick disassembly and assembly assembly comprises a positioning pin and a connecting screw, the clamp base is provided with a downwardly protruding positioning boss, the workbench is provided with a positioning groove in clearance fit with the positioning boss, and the clamp base and the workbench are both provided with a connecting threaded hole penetrating through the clamp base, so that the clamp base is fixedly installed on the workbench through the connecting screw during installation, and the workbench is provided with a pin hole matching the size of the positioning pin.

[0011] Preferably, the cooling assembly comprises a cooling flow channel, an inlet interface and an outlet interface, the cooling flow channel is in a serpentine distribution inside the clamp base, the inlet interface and the outlet interface are respectively arranged on the two side walls of the clamp base and are both in communication with the cooling flow channel, the inlet interface is connected with the cooling system of the machine tool body through a hose, and the outlet interface is connected with a machine tool waste liquid recycling device through a hose.

[0012] Preferably, the positioning slider top is provided with a vertical upward positioning baffle, the inner side end face of the positioning baffle is pasted with a wear-resistant ceramic layer with a thickness of 1-2 mm, a pressure sensor is installed on one side face of the positioning baffle, and the piston rod of one side clamping cylinder is opposite to the pressure sensor.

[0013] The beneficial effects of the present application are as follows: (I) The adjustable positioning assembly drives the positioning slider to slide along the positioning sliding groove through the positioning screw, and cooperates with the scale disc with angle scale to accurately adjust the position of the positioning slider; the laser displacement sensor of the real-time positioning detection assembly can detect the position of the workpiece in real time, the signal indicating lamp emits green light when qualified, and alarms when abnormal, thereby double-protecting the positioning accuracy of the workpiece and avoiding manual calibration error, and providing a reliable reference for high-precision mold machining.

[0014] (II) The pressure sensor of the self-adaptive clamping assembly detects the clamping pressure in real time, and the controller adjusts the output pressure of the clamping cylinder according to the detection value, one side cylinder first pushes the elastic pressure head to contact the pressure sensor for positioning, and the other side cylinder adjusts the piston rod extension in real time according to the pressure value, so that self-adaptive clamping is realized, which not only avoids damage to the workpiece due to excessive pressure, but also prevents workpiece displacement due to insufficient pressure, thereby ensuring the stability of the machining process.

[0015] (III) The serpentine cooling flow channel of the cooling assembly is built-in in the clamp base, and the circulating flow of the cooling liquid can quickly take away the machining heat, prevent the workpiece and the clamp from being deformed due to heat, and ensure the machining precision; the quick disassembly and assembly assembly is guided by the positioning boss and the positioning groove, and is positioned and fixed by the positioning pin and the connecting screw, so that when disassembling and assembling, the clamp base can be removed only by removing the connecting screw, thereby greatly simplifying the maintenance process and improving the equipment operation and maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a schematic diagram of the three-dimensional structure of the machine tool main body of the present application; Figure 3 is a schematic diagram of the three-dimensional structure of the workbench and the clamp base and the like structure of the present application; Figure 4 is a schematic diagram of the three-dimensional structure of the self-adaptive clamping assembly and the real-time positioning detection assembly and the like structure of the present application; Figure 5 is a schematic diagram of the three-dimensional structure of the adjustable positioning assembly and the clamp base and the like structure of the present application; Figure 6 is a schematic diagram of the three-dimensional structure of the positioning boss and the positioning pin and the like structure of the present application.

[0017] Mark No. : 1, machine tool main body; 11, workbench; 12, positioning groove; 13, pin hole; 2, wire moving mechanism; 3, workpiece clamp; 4, adjustable positioning assembly; 41, positioning sliding block; 411, positioning stop edge; 42, positioning screw; 43, dial; 5, clamp base; 51, positioning sliding groove; 52, positioning boss; 6, self-adaptive clamping assembly; 61, clamping cylinder; 62, pressure sensor; 63, elastic pressure head; 64, controller; 65, cylinder support; 7, real-time positioning detection assembly; 71, laser displacement sensor; 72, signal indicator; 73, detection support; 8, quick disassembly and assembly assembly; 81, positioning pin; 82, connecting screw; 83, connecting threaded hole; 9, cooling assembly; 91, cooling flow channel; 92, liquid inlet interface; 93, liquid outlet interface. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0020] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0021] The electrical components appearing in the text are all connected with the main controller and 220V mains of the outside world, and the main controller can be a conventional known device such as a computer for control.

[0022] In the description of the embodiments of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer", "upper", etc. are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the product of the present application is used, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] Embodiment: Refer to Figures 1-6 The utility model provides a kind of slow wire-cut machine tool for processing high-precision mould, including machine tool main body 1, wire-cut mechanism 2 and workpiece clamp 3, workbench 11 is fixedly installed on machine tool main body 1, wire-cut mechanism 2 is installed at the top of machine tool main body 1, workpiece clamp 3 is set on the workbench 11 of machine tool main body 1, workbench 11 is equipped with clamp base 5, and workpiece clamp 3 includes: Adjustable positioning assembly 4 is located on clamp base 5, for providing reference for the position of workpiece to positioning; Self-adapting clamping assembly 6 is symmetrically arranged on the top of clamp base 5 on both sides, for clamping workpiece; Real-time positioning detection assembly 7 is arranged at the midpoint of the side of clamp base 5 away from wire-cut mechanism 2; Quick disassembly and assembly component 8 is arranged at the bottom of clamp base 5, and clamp base 5 and workbench 11 are quickly positioned through quick disassembly and assembly component 8 to facilitate installation and disassembly; Cooling assembly 9 is integrated in the inside of clamp base 5, and cooling liquid flows in clamp base 5 through cooling assembly 9 to realize the cooling of clamp and workpiece.

[0024] Adjustable positioning assembly 4 includes positioning slider 41, positioning screw 42 and dial 43, positioning slide groove 51 extending along the length direction of clamp base 5 is formed on clamp base 5, positioning slider 41 is slidingly embedded in positioning slide groove 51, positioning screw 42 is arranged along the length direction of positioning slide groove 51, one end penetrates through positioning slider 41 and is rotationally installed in the inner wall of positioning slide groove 51, the other end penetrates through the side wall of clamp base 5 and is keyed connected with dial 43, 0-360° angle scale is arranged on the outer periphery of dial 43, external thread is arranged on the outer periphery of positioning screw 42, and positioning screw 42 is threadedly connected with positioning slider 41.

[0025] Self-adapting clamping assembly 6 includes clamping cylinder 61, pressure sensor 62, elastic pressure head 63 and controller 64, clamping cylinder 61 is bolted to clamp base 5 through cylinder support 65, the end of piston rod of clamping cylinder 61 is fixedly connected with elastic pressure head 63, controller 64 is fixed to the side of clamp base 5 through screw, the input end of controller 64 is electrically connected with pressure sensor 62 through wire, and the output end of controller 64 is electrically connected with the electromagnetic valve of clamping cylinder 61 through wire, and the output pressure of clamping cylinder 61 can be adjusted according to the detection value of pressure sensor 62.

[0026] The real-time positioning detection assembly 7 comprises a laser displacement sensor 71, a signal indicator 72 and a detection bracket 73. The detection bracket 73 is in an L-shaped structure and is fixed to the clamp base 5 by bolts. The laser displacement sensor 71 is fixed to the detection bracket 73 by a flange, and its detection end is vertically downward towards the upper surface of the mold blank. The signal indicator 72 is clamped on the top of the detection bracket 73. Both the laser displacement sensor 71 and the signal indicator 72 are electrically connected to the controller 64 through wires.

[0027] The quick disassembly assembly 8 comprises a positioning pin 81 and a connecting screw 82. The clamp base 5 is provided with a downward protruding positioning boss 52. The workbench 11 is provided with a positioning recess 12 which is in clearance fit with the positioning boss 52. The clamp base 5 and the workbench 11 are both provided with a connecting threaded hole 83 which penetrates the clamp base 5. The clamp base 5 is fixedly installed on the workbench 11 by the connecting screw 82. The workbench 11 is provided with a pin hole 13 which is in size fit with the positioning pin 81.

[0028] The cooling assembly 9 comprises a cooling flow channel 91, an inlet interface 92 and an outlet interface 93. The cooling flow channel 91 is in a serpentine distribution inside the clamp base 5. The inlet interface 92 and the outlet interface 93 are respectively arranged on the two side walls of the clamp base 5 and are both in communication with the cooling flow channel 91. The inlet interface 92 is connected to the cooling system of the machine tool body 1 through a hose. The outlet interface 93 is connected to the machine tool waste liquid recycling device through a hose.

[0029] The positioning sliding block 41 is provided with a vertical upward positioning stop edge 411 on the top. A wear-resistant ceramic layer with a thickness of 1-2 mm is pasted on the inner end face of the positioning stop edge 411. The pressure sensor 62 is installed on one side face of the positioning stop edge 411, and the piston rod of the one side clamping cylinder 61 is opposite to the pressure sensor 62.

[0030] In use, the workpiece clamp 3 is assembled first. The zero scale of the scale disc 43 is aligned with the initial position of the positioning sliding block 41. The cylinder bracket 65 is fixed to the clamp base 5. The clamping cylinder 61 is installed on the cylinder bracket 65. The elastic pressure head 63 is connected to the piston rod. The controller 64 is fixed and connected to the wires. The detection bracket 73 is fixed to the clamp base 5. The laser displacement sensor 71 and the signal indicator 72 are respectively installed on the bottom and the top of the detection bracket 73. The connecting wires are connected to the controller 64. The positioning boss 52 of the clamp base 5 is inserted into the positioning recess 12. Under the guidance of the positioning boss 52, the positioning pin 81 is inserted into the pin hole 13. The connecting screw 82 is screwed into the connecting threaded hole 83. The connecting screw 82 is rotated until it penetrates the clamp base 5 and is screwed into the workbench 11 and is tightened. The inlet interface 92 and the outlet interface 93 are installed. The hoses are connected to the cooling system 15 and the waste liquid recycling device 16.

[0031] The mold blank is placed on the fixture base 5 and the side edge is in contact with the positioning stop edge 411, the dial 43 is rotated to adjust the position of the positioning block 41, until the workpiece is moved directly below the laser displacement sensor 71, the real-time positioning detection assembly 7 is started, the laser displacement sensor 71 detects the position, and the signal indicator 72 emits green light, which indicates that the positioning is qualified. The controller 64 starts the clamping cylinder 61 on one side of the proximity pressure sensor 62, the clamping cylinder 61 pushes out the piston rod, and stops when the elastic pressure head 63 contacts the pressure sensor 62. At this time, the other side of the clamping cylinder 61 is started again through the controller 64, until the elastic pressure head 63 contacts the workpiece, and the clamping cylinder 61 on one side of the proximity pressure sensor 62 remains stationary. The pressure sensor 62 detects the pressure, and the controller 64 adjusts the pressure to the preset range. The other side of the clamping cylinder 61 adjusts the piston rod in real time according to the pressure value to maintain the clamping force.

[0032] The wire speed and discharge parameters are set, the wire moving mechanism 2 and the cooling system 15 are started, and the cooling liquid circulates along the cooling flow channel 91.

[0033] During processing, the laser displacement sensor 71 and the pressure sensor 62 detect in real time, and when the offset exceeds the threshold or the pressure is abnormal, the signal indicator 72 alarms, and the controller 64 can pause the equipment.

[0034] After processing is completed, the controller 64 controls the clamping cylinder 61 to reset, and the workpiece is removed. When the fixture needs to be maintained, the connecting screw 82 is removed with a tool, and the fixture base 5 can be completely removed.

[0035] Working principle: First, assemble the workpiece fixture 3, align the zero scale of the dial 43 with the initial position of the positioning block 41, fix the cylinder support 65 to the fixture base 5, install the clamping cylinder 61 on the cylinder support 65, connect the control line after fixing the controller 64, fix the detection support 73 to the fixture base 5, install the laser displacement sensor 71 and the signal indicator 72 at the bottom and top of the detection support 73 respectively, connect the control line to the controller 64, align the positioning boss 52 of the fixture base 5 with the positioning groove 12 and insert it, under the guidance of the positioning boss 52, insert the positioning pin 81 into the pin hole 13, thread the connecting screw 82 into the connecting threaded hole 83, rotate the connecting screw 82 until it penetrates the fixture base 5 and is screwed into the workbench 11, and tighten it, install the liquid inlet 92 and the liquid outlet 93, and connect the hose to the cooling system 15 and the waste liquid recovery device 16.

[0036] The mold blank is placed on the fixture base 5 and the side edge is in contact with the positioning stopper 411, the dial 43 is rotated to adjust the position of the positioning slider 41, until the workpiece is moved directly below the laser displacement sensor 71, the real-time positioning detection assembly 7 is started, the laser displacement sensor 71 detects the position, and the signal indicator 72 emits green light, which indicates that the positioning is qualified. The controller 64 starts the clamping cylinder 61 on the side close to the pressure sensor 62, the clamping cylinder 61 pushes out the piston rod until the elastic pressure head 63 contacts the pressure sensor 62 and stops, at this time, the other side of the clamping cylinder 61 is started by the controller 64, until the elastic pressure head 63 contacts the workpiece, the clamping cylinder 61 on the side close to the pressure sensor 62 remains stationary, the pressure sensor 62 detects the pressure, the controller 64 adjusts the pressure to the preset range, and the clamping cylinder 61 on the other side adjusts the piston rod pushing out and retracting degree in real time according to the pressure value, so as to maintain the clamping degree.

[0037] The wire feeding speed and discharge parameters are set, the wire feeding mechanism 2 and the cooling system 15 are started, and the cooling liquid circulates along the cooling flow channel 91.

[0038] During processing, the laser displacement sensor 71 and the pressure sensor 62 detect in real time, when the offset exceeds the threshold or the pressure is abnormal, the signal indicator 72 alarms, and the controller 64 can pause the equipment.

[0039] After processing is completed, the controller 64 controls the clamping cylinder 61 to reset, and the workpiece is taken out, when the fixture needs to be maintained, the connecting screw 82 is removed by using a tool, and then the fixture base 5 can be completely removed.

[0040] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A slow wire EDM machine tool for processing high-precision molds, comprising a machine tool body (1), a wire feeding mechanism (2), and a workpiece fixture (3), wherein a worktable (11) is fixedly mounted on the machine tool body (1), the wire feeding mechanism (2) is mounted on the top of the machine tool body (1), and the workpiece fixture (3) is disposed on the worktable (11) of the machine tool body (1), characterized in that: A fixture base (5) is mounted on the workbench (11), and the workpiece fixture (3) includes: An adjustable positioning component (4) is provided on the fixture base (5) to provide a reference for positioning the workpiece; An adaptive clamping assembly (6) is symmetrically arranged on both sides of the top of the fixture base (5) for clamping the workpiece; The real-time positioning detection component (7) is located at the midpoint of the side of the fixture base (5) away from the wire feeding mechanism (2); The quick-release assembly (8) is located at the bottom of the fixture base (5). The quick-release assembly (8) allows the fixture base (5) and the worktable (11) to be quickly positioned for easy installation and disassembly. The cooling component (9) is integrated inside the fixture base (5). The cooling component (9) allows the coolant to flow inside the fixture base (5) to cool the fixture and the workpiece.

2. The slow wire EDM machine tool for machining high-precision molds according to claim 1, characterized in that, The adjustable positioning component (4) includes a positioning slider (41), a positioning screw (42) and a scale (43). A positioning groove (51) extending along the length of the fixture base (5) is provided on the fixture base (5). The positioning slider (41) is slidably embedded in the positioning groove (51). The positioning screw (42) is arranged along the length of the positioning groove (51). One end passes through the positioning slider (41) and is rotatably installed in the inner wall of the positioning groove (51). The other end passes through the side wall of the fixture base (5) and is keyed to the scale (43). The outer periphery of the scale (43) is provided with an angle scale of 0-360°.

3. A slow wire EDM machine tool for machining high-precision molds according to claim 2, characterized in that, The positioning screw (42) has an external thread on its outer circumference, and the positioning screw (42) is threadedly connected to the positioning slider (41).

4. A slow wire EDM machine tool for machining high-precision molds according to claim 1, characterized in that, The adaptive clamping assembly (6) includes a clamping cylinder (61), a pressure sensor (62), an elastic pressure head (63), and a controller (64). The clamping cylinder (61) is bolted to the fixture base (5) via a cylinder bracket (65). The piston rod end of the clamping cylinder (61) is fixedly connected to the elastic pressure head (63). The controller (64) is fixed to the side of the fixture base (5) via screws.

5. A slow wire EDM machine tool for machining high-precision molds according to claim 4, characterized in that, The input end of the controller (64) is electrically connected to the pressure sensor (62) via a wire, and the output end of the controller (64) is electrically connected to the solenoid valve of the clamping cylinder (61) via a wire. The output pressure of the clamping cylinder (61) can be adjusted according to the detection value of the pressure sensor (62).

6. A slow wire EDM machine tool for machining high-precision molds according to claim 1, characterized in that, The real-time positioning detection component (7) includes a laser displacement sensor (71), a signal indicator (72), and a detection bracket (73). The detection bracket (73) is an L-shaped structure and is fixed to the fixture base (5) by bolts. The laser displacement sensor (71) is fixed to the detection bracket (73) by a flange, with its detection end pointing vertically downward toward the upper surface of the mold blank. The signal indicator (72) is snapped onto the top of the detection bracket (73). Both the laser displacement sensor (71) and the signal indicator (72) are electrically connected to the controller (64) via wires.

7. A slow wire EDM machine tool for machining high-precision molds according to claim 1, characterized in that, The quick-release assembly (8) includes a positioning pin (81) and a connecting screw (82). The bottom of the fixture base (5) is provided with a downwardly protruding positioning boss (52). The worktable (11) is provided with a positioning groove (12) that is clearance-fitted with the positioning boss (52). Both the fixture base (5) and the worktable (11) are provided with connecting threaded holes (83). The connecting threaded holes (83) penetrate the fixture base (5). During installation, the fixture base (5) is fixedly installed on the worktable (11) by the connecting screw (82). The worktable (11) is provided with a pin hole (13) that matches the size of the positioning pin (81).

8. A slow wire EDM machine tool for machining high-precision molds according to claim 1, characterized in that, The cooling assembly (9) includes a cooling channel (91), a liquid inlet (92), and a liquid outlet (93). The cooling channel (91) is distributed in a serpentine shape inside the fixture base (5). The liquid inlet (92) and the liquid outlet (93) are respectively located on the two side walls of the fixture base (5) and are connected to the cooling channel (91). The liquid inlet (92) is connected to the cooling system of the machine tool body (1) through a hose, and the liquid outlet (93) is connected to the machine tool waste liquid recovery device through a hose.

9. A slow wire EDM machine tool for machining high-precision molds according to claim 2, characterized in that, The top of the positioning slider (41) is provided with a vertically upward positioning stop (411). The inner end face of the positioning stop (411) is covered with a wear-resistant ceramic layer with a thickness of 1 to 2 mm. The pressure sensor (62) is installed on one side of the positioning stop (411), and the piston rod of the clamping cylinder (61) on one side is directly opposite the pressure sensor (62).

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