Electric spark machine tool for machining mold

Abstract

The invention discloses an electric spark machine tool for machining a mold, which comprises a workbench, a guide assembly I, a guide assembly II, a rack, an adjustable machining cutter electrode and an electrode replacement assembly, and the guide assembly I is mounted on the workbench and comprises a motor I and a lead screw I mounted on the motor I; the first lead screw is horizontally installed on the workbench and penetrates through the installation frame in a threaded mode, the second guide assembly is fixed to the installation frame and comprises a second motor, a second lead screw, a sliding block and a connecting rod, the second motor is fixed to the installation frame, the power output end of the second motor is connected with the second lead screw, and the second lead screw is rotationally inserted into the installation frame in a penetrating mode. The sliding block is arranged at the top of the mounting frame in a sliding mode, the upper portion of the sliding block is connected with the rack through a connecting rod, the rack comprises a shell and an electric spark generator mounted in the shell, and the electric spark generator is connected with an electrified wire. The electric spark machine tool designed by the invention can be used for automatically machining workpieces, accurately adjusting the workpieces and automatically replacing cutter electrodes.

Description

Technical Field

[0001] The invention relates to the technical field of electric spark machine tools, in particular to an electric spark machine tool for processing molds. Background Art

[0002] An EDM machine is a precision machine tool specially used for processing metal materials. Its working principle is to use electric spark discharge to generate high-temperature and high-pressure electric sparks on the surface of metal workpieces to remove metal materials and form the required shape and size. This machine tool is usually used to process hard, high-strength and wear-resistant materials to manufacture precision metal parts. The basic principle of EDM is to form a small gap between the workpiece surface and the electrode, and generate an electric field in the gap through the action of voltage, so that electric spark discharge is generated between the workpiece surface and the electrode. The high temperature and high pressure of the electric spark can instantly melt and evaporate the metal material, realizing the micro-machining of the workpiece surface. During the processing of molds, EDM machines sometimes need to be precisely processed.

[0003] However, the existing EDM machine tools have the following problems in the process of processing molds: Since EDM melts metal through discharge between the machining tool electrode and the workpiece, the machining tool electrode will be worn, resulting in reduced machining accuracy and rough machining surface; in addition, the gap between the machining tool electrode and the workpiece needs to be precisely controlled. If the machining tool electrode position deviation or uneven gap, it will affect the machining quality and accuracy, and the existing adjustment method for the machining tool electrode is often low in accuracy and cannot meet the needs of precision machining. Therefore, it is necessary to design corresponding technical solutions to solve the existing technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide an electric spark machine for processing molds, which solves the technical problem that since electric spark discharge machining melts metal by discharging between a machining tool electrode and a workpiece, the machining tool electrode will be worn, resulting in reduced machining accuracy and rough machining surface; in addition, the gap between the machining tool electrode and the workpiece needs to be precisely controlled. If the position of the machining tool electrode deviates or the gap is uneven, the machining quality and accuracy will be affected. However, the existing adjustment method for the machining tool electrode is often of low accuracy and cannot meet the needs of precision machining.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric spark machine tool for processing molds, comprising a workbench, a guide component 1, a guide component 2, a frame, an adjustable processing tool electrode and an electrode replacement component, wherein the guide component 1 is installed on the workbench and comprises a motor 1 and a lead screw 1 installed on the motor 1, the lead screw 1 is horizontally installed on the workbench and is threadedly inserted with a mounting frame, the guide component 2 is fixed on the mounting frame, the guide component 2 comprises a motor 2, a lead screw 2, a slider and a connecting rod, the motor 2 is fixed on the mounting frame and the power output end is connected to the lead screw 2, the lead screw 2 is rotatably inserted on the mounting frame, the slider is slidably arranged on the top of the mounting frame, the upper part of the slider is connected to the frame through a connecting rod, the frame comprises a shell and an electric spark generator installed inside the shell, the electric spark generator is connected with a live wire, the live wire is connected to the adjustable processing tool electrode, the lower end of the shell is also equipped with a magnetic clamp used in conjunction with the adjustable processing tool electrode, and the motor replacement component is installed on the mounting frame;

[0006] The adjustable machining tool electrode comprises a mounting seat, an electric head, an electrode body and a displacement adjuster. The mounting seat is provided with a mounting opening at the bottom and two groups of bayonet openings are symmetrically provided on both sides. The electric head is installed on the top of the mounting seat and contacts the live wire. The upper end of the electrode body is inserted into the mounting opening. The displacement adjuster is installed in the mounting opening. The bayonet opening is used in conjunction with a magnetic clamp.

[0007] The electrode replacement assembly includes an electric push rod, a placement rack, a spare tool electrode, a floating regulator, an infrared sensor and an infrared receiver. The electric push rod is divided into two groups and is symmetrically installed on the mounting rack. The power output end of the electric push rod is connected to the placement rack. The placement rack is machined with several groups of placement slots. The spare tool electrodes are divided into several groups and are placed in several groups of placement slots respectively. The infrared sensors are divided into several groups and are installed on several groups of placement slots respectively. The infrared receiver is installed on the housing and is located on one side of the mounting port. The infrared receiver is connected to a controller through a line. The floating regulator is located at the bottom of the spare tool electrode.

[0008] As a preferred embodiment of the present invention, the displacement regulator includes an arc-shaped air cushion, a pipeline and an air pump. The arc-shaped air cushions are divided into several groups and are evenly distributed in a ring shape in the installation port. The arc-shaped air cushions are connected to the air pump through a pipeline.

[0009] As a preferred embodiment of the present invention, the arc-shaped air cushion is in an arc-shaped structure and the surface is processed into a stacked structure, and the arc-shaped air cushion is in contact with the electrode body.

[0010] As a preferred embodiment of the present invention, the magnetic clamp includes a bracket, an electromagnetic block, a magnet, a fixed rod, a clamping block and a reset spring. The bracket is divided into two groups and is symmetrically installed on both sides of the outer shell. The electromagnetic block is located at the inner end of the bracket, the magnet is located on one side of the electromagnetic block and is connected to the clamping block through the fixed rod. The clamping block is used in conjunction with the bayonet, and the reset spring is embedded in the fixed rod.

[0011] As a preferred embodiment of the present invention, the inner magnetic pole of the electromagnetic block is the same as the outer magnetic pole of the magnet when the electromagnetic block is powered on.

[0012] As a preferred embodiment of the present invention, an opening is formed at the upper end of the placement groove, and the diameter of the opening is larger than the diameter of the spare tool electrode.

[0013] As a preferred embodiment of the present invention, the floating regulator includes a motor and a rotating disk installed on the power output end of the motor, a toggle block is fixed to the edge of the rotating disk, the toggle block is fan-shaped and the width of one end is smaller than the width of the other end, and the toggle block is in contact with the lower end of the spare tool electrode.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention designs an electric spark machine tool specially used for processing molds. The electric spark machine tool includes a workbench, a guide component 1, a guide component 2, a frame, an adjustable processing tool electrode and an electrode replacement component. The frame can be adjusted in both directions through the guide component 1 and the guide component 2, respectively, so that the position of the frame can be adjusted and the workpiece can be processed by the adjustable processing tool electrode. In addition, the position of the electrode body can be accurately adjusted by the adjustable processing tool electrode. When the processing tool electrode is worn, the adjustable processing tool electrode is automatically replaced by the electrode replacement component, thereby ensuring the processing effect of the electric spark machine tool on the workpiece.

[0016] 2. The electric spark machine designed by the present invention can automatically process workpieces, accurately adjust them, and automatically replace tool electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structure diagram of the present invention;

[0018] Figure 2 This is a structural diagram of the rack installation of the present invention;

[0019] Figure 3 It is a local A structural diagram of the present invention;

[0020] Figure 4 This is a structural diagram of the displacement regulator of the present invention;

[0021] Figure 5 This is a structural diagram of the electrode replacement assembly described in the present invention.

[0022] In the figure: 1. workbench; 2. motor 1; 3. lead screw 1; 4. mounting frame; 5. motor 2; 6. lead screw 2; 7. slider; 8. connecting rod; 9. housing; 10. spark generator; 11. power line; 12. magnetic clamp; 13. mounting seat; 14. connecting head; 15. electrode body; 16. displacement regulator; 17. mounting port; 18. bayonet; 19. electric push rod; 20. placement rack; 21. spare tool electrode; 22. floating regulator; 23. infrared sensor; 24. infrared receiver; 25. placement slot; 26. controller; 27. arc air cushion; 28. pipeline; 29. ​​air pump; 30. bracket; 31. electromagnetic block; 32. magnet; 33. fixing rod; 34. clamping block; 35. reset spring; 36. opening; 37. motor; 38. rotating disk; 39. toggle block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5 The present invention provides a technical solution: an electric spark machine tool for processing molds, comprising a workbench 1, a guide component 1, a guide component 2, a frame, an adjustable processing tool electrode and an electrode replacement component, the guide component 1 is installed on the workbench 1 and includes a motor 1 2 and a lead screw 1 3 installed on the motor 1 2, the lead screw 1 3 is horizontally installed on the workbench 1 and a mounting frame 4 is threadedly inserted, the guide component 2 is fixed on the mounting frame 4, the guide component 2 includes a motor 2 5, a lead screw 2 6, a slider 7 and a connecting rod 8, the motor 2 5 is fixed to the mounting frame 4 The power output end is connected to the lead screw 2 6, the lead screw 2 6 rotates and is inserted into the mounting frame 4, the slider 7 is slidably arranged on the top of the mounting frame 4, the upper part of the slider 7 is connected to the frame through the connecting rod 8, the frame includes a housing 9 and an electric spark generator 10 installed inside the housing 9, the electric spark generator 10 is connected to a live wire 11, the live wire 11 is connected to the adjustable machining tool electrode, the lower end of the housing 9 is also installed with a magnetic clamp 12 used in conjunction with the adjustable machining tool electrode, and the motor replacement assembly is installed on the mounting frame 4;

[0025] The adjustable machining tool electrode comprises a mounting seat 13, an electric head 14, an electrode body 15 and a displacement regulator 16. A mounting opening 17 is provided at the bottom of the mounting seat 13 and two groups of bayonet openings 18 are symmetrically provided on both sides. The electric head 14 is installed at the top of the mounting seat 13 and contacts the live wire 11. The upper end of the electrode body 15 is inserted into the mounting opening 17. The displacement regulator 16 is installed in the mounting opening 17. The bayonet opening 18 is used in conjunction with the magnetic clamp 12.

[0026] The electrode replacement assembly includes an electric push rod 19, a placement rack 20, a spare tool electrode 21, a floating regulator 22, an infrared sensor 23 and an infrared receiver 24. The electric push rod 19 is divided into two groups and symmetrically installed on the mounting rack 4. The power output end of the electric push rod 19 is connected to the placement rack 20. The placement rack 20 is formed with a plurality of placement slots 25. The spare tool electrodes 21 are divided into a plurality of groups and are respectively placed in the plurality of placement slots 25. The infrared sensors 23 are divided into a plurality of groups and are respectively installed on the plurality of placement slots 25. The infrared receiver 24 is installed on the housing 9 and is located at the mounting On one side of the opening 17, the infrared receiver 24 is connected to the controller 26 through a line, and the floating regulator 22 is located at the bottom of the spare tool electrode 21. When the adjustable machining tool needs to be replaced, the placement rack 20 is pushed by the electric push rod 19 to move and move the placement rack 20 to the bottom of the adjustable machining tool electrode. At this time, the guide component 2 drives the frame and the adjustable machining tool electrode to move. During the movement, the infrared sensor 23 and the infrared receiver 24 sense it, and the worn adjustable machining tool electrode after use is inserted into the placement slot 25, and the spare tool electrode 21 is replaced.

[0027] Further improvement, such as Figure 4 As shown, the displacement regulator 16 includes an arc-shaped air cushion 27, a pipeline 28 and an air pump 29. The arc-shaped air cushion 27 is divided into several groups and is evenly distributed in a ring shape in the installation port 17. The arc-shaped air cushion 27 is connected to the air pump 29 through the pipeline 28. The air pump 29 introduces gas into the arc-shaped air cushion 27 through the pipeline 28 to achieve the expansion of the arc-shaped air cushion 27 and thus achieve the purpose of adjusting the position of the electrode body 15.

[0028] Further improvement, such as Figure 4 As shown, the arc-shaped air cushion 27 has an arc-shaped structure and its surface is processed into a stacked structure. The arc-shaped air cushion 27 is in contact with the electrode body 15. The arc-shaped air cushion 27 can push the electrode body 15 to move to the opposite side when inflated.

[0029] Further improvement, such as Figure 3As shown, the magnetic clamp 12 includes a bracket 30, an electromagnetic block 31, a magnet 32, a fixing rod 33, a clamping block 34 and a reset spring 35. The bracket 30 is divided into two groups and is symmetrically installed on both sides of the housing 9. The electromagnetic block 31 is located at the inner end of the bracket 30, the magnet 32 ​​is located on one side of the electromagnetic block 31 and is connected to the clamping block 34 through the fixing rod 33. The clamping block 34 is used in conjunction with the bayonet 18, and the reset spring 35 is embedded in the fixing rod 33. The electromagnetic block 31 and the magnet 32 ​​are used in conjunction to realize the movement of the clamping block 34 to the inside, and the reset spring 35 can be used to move the clamping block 34 to the outside.

[0030] Further improvement, such as Figure 3 As shown, the inner magnetic pole of the electromagnetic block 31 is the same as the outer magnetic pole of the magnet 32 ​​when the power is on. The electromagnetic block 31 generates magnetism when the power is on and pushes the magnet 32 ​​to move inward and be clamped into the clamping port 18 through the clamping block 34, thereby achieving the purpose of limiting and fixing the spare tool electrode 31.

[0031] Further improvement, such as Figure 5 As shown, an opening 36 is formed at the upper end of the placement groove 25, and the diameter of the opening 36 is larger than the diameter of the spare tool electrode 21, which is convenient for the spare tool electrode 31 to float upward and adjust and insert and store the worn electrode after use.

[0032] Specifically, the floating regulator 22 includes a motor 37 and a rotating disk 38 installed at the power output end of the motor 37. A toggle block 39 is fixed to the edge of the rotating disk 38. The toggle block 39 has a fan-shaped structure and the width of one end is smaller than the width of the other end. The toggle block 39 contacts the lower end of the spare tool electrode 21. The rotating disk 38 is driven to rotate by the motor 37. During the rotation, the rotating disk 38 drives the toggle block 39 to rotate synchronously. During the rotation, the toggle block 39 lifts the spare tool electrode 31 upward and inserts it into the bottom of the outer shell 9.

[0033] During use: when it is necessary to process the mold workpiece, the guide component 1 and the guide component 2 can realize bidirectional position adjustment of the frame and the adjustable machining tool electrode and process the mold workpiece, and the air pump 29 introduces gas into the arc-shaped air cushion 27 through the pipeline 28 to achieve the expansion of the arc-shaped air cushion 27 and thus achieve the purpose of adjusting the position of the electrode body 15. When the electrode body 15 is worn and needs to be replaced, the placement rack 20 is pushed to move by the electric push rod 19 and the placement rack 20 is moved to the bottom of the adjustable machining tool electrode. At this time, the frame and the adjustable machining tool electrode are driven to move by the guide component 2. During the movement, the infrared sensor 23 and the infrared receiver 24 sense and transmit the signal to the controller 26. The controller 26 controls the electromagnetic block 31 to cut off the power, and under the action of the reset spring 35, the block 34 is disengaged from the bayonet 18, and the worn adjustable machining tool electrode is clamped into the placement slot 25, and then the frame continues to move to reach the top of the spare tool electrode 31. At this time, the motor 37 drives the rotating disk 38 to rotate, and the rotating disk 38 drives the toggle block 39 to rotate synchronously during the rotation. During the rotation, the toggle block 39 lifts the spare tool electrode 31 upward and inserts it into the bottom of the housing 9. When powered on, the electromagnetic block 31 generates magnetism and pushes the magnet 32 ​​to move inward and be clamped into the bayonet 18 through the block 34, so as to achieve the purpose of limiting and fixing the spare tool electrode 31. At this time, the arc-shaped air cushion 27 is docked with the pipeline 28 to complete the automatic replacement.

[0034] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0036] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric spark machine tool for processing molds, characterized in that: The invention comprises a workbench (1), a guide assembly 1, a guide assembly 2, a frame, an adjustable machining tool electrode and an electrode replacement assembly, wherein the guide assembly 1 is mounted on the workbench (1) and comprises a motor 1 (2) and a lead screw 1 (3) mounted on the motor 1 (2), the lead screw 1 (3) is horizontally mounted on the workbench (1) and is threadedly inserted with a mounting frame (4), the guide assembly 2 is fixed on the mounting frame (4), the guide assembly 2 comprises a motor 2 (5), a lead screw 2 (6), a slider (7) and a connecting rod (8), the motor 2 (5) is fixed on the mounting frame (4) and the power output end is connected to the lead screw 2 (6) , the second lead screw (6) is rotatably inserted into the mounting frame (4), the slider (7) is slidably arranged on the top of the mounting frame (4), the upper part of the slider (7) is connected to the frame through a connecting rod (8), the frame comprises a housing (9) and an electric spark generator (10) installed inside the housing (9), the electric spark generator (10) is connected to a conducting wire (11), the conducting wire (11) is connected to an adjustable machining tool electrode, the lower end of the housing (9) is also equipped with a magnetic clamp (12) used in conjunction with the adjustable machining tool electrode, and the motor replacement assembly is installed on the mounting frame (4); The adjustable machining tool electrode comprises a mounting seat (13), an electrical connection head (14), an electrode body (15) and a displacement adjuster (16); a mounting opening (17) is provided at the bottom of the mounting seat (13) and two groups of bayonet openings (18) are symmetrically provided on both sides; the electrical connection head (14) is mounted on the top of the mounting seat (13) and in contact with the live wire (11); the upper end of the electrode body (15) is inserted into the mounting opening (17); the displacement adjuster (16) is mounted in the mounting opening (17); and the bayonet opening (18) is used in conjunction with a magnetically driven clamp (12); The electrode replacement assembly comprises an electric push rod (19), a placement rack (20), a spare tool electrode (21), a floating regulator (22), an infrared sensor (23) and an infrared receiver (24). The electric push rod (19) is divided into two groups and is symmetrically mounted on the mounting rack (4). The power output end of the electric push rod (19) is connected to the placement rack (20). The placement rack (20) is machined with a plurality of placement slots (25). The spare tool electrode (21) is divided into a plurality of groups and is respectively placed in the plurality of placement slots (25). The infrared sensor (23) is divided into a plurality of groups and is respectively mounted on the plurality of placement slots (25). The infrared receiver (24) is mounted on the housing (9) and is located on one side of the mounting opening (17). The infrared receiver (24) is connected to a controller (26) via a line. The floating regulator (22) is located at the bottom of the spare tool electrode (21).

2. The electric spark machine tool for processing molds according to claim 1, characterized in that: The displacement regulator (16) comprises an arc-shaped air cushion (27), a pipeline (28) and an air pump (29); the arc-shaped air cushion (27) is divided into a plurality of groups and is evenly distributed in a ring shape in the installation opening (17); the arc-shaped air cushion (27) is connected to the air pump (29) through the pipeline (28).

3. The electric spark machine tool for processing molds according to claim 2, characterized in that: The arc-shaped air cushion (27) has an arc-shaped structure and its surface is processed into a layered structure. The arc-shaped air cushion (27) is in contact with the electrode body (15).

4. The electric spark machine tool for processing molds according to claim 1, characterized in that: The magnetic clamp (12) comprises a bracket (30), an electromagnetic block (31), a magnet (32), a fixing rod (33), a clamping block (34) and a reset spring (35). The bracket (30) is divided into two groups and is symmetrically installed on both sides of the housing (9). The electromagnetic block (31) is located at the inner end of the bracket (30). The magnet (32) is located on one side of the electromagnetic block (31) and is connected to the clamping block (34) through the fixing rod (33). The clamping block (34) is used in conjunction with the bayonet (18). The reset spring (35) is embedded on the fixing rod (33).

5. The electric spark machine tool for processing molds according to claim 4, characterized in that: When the electromagnetic block (31) is powered on, the inner magnetic pole is the same as the outer magnetic pole of the magnet (32).

6. The electric spark machine tool for processing molds according to claim 1, characterized in that: An opening (36) is formed at the upper end of the placement groove (25), and the diameter of the opening (36) is greater than the diameter of the spare tool electrode (21).

7. The electric spark machine tool for processing molds according to claim 6, characterized in that: The floating regulator (22) comprises a motor (37) and a rotating disk (38) mounted on the power output end of the motor (37); a toggle block (39) is fixed to the edge of the rotating disk (38); the toggle block (39) is fan-shaped and has a width at one end smaller than that at the other end; the toggle block (39) contacts the lower end of the spare tool electrode (21).

Images