Grinding wheel electric discharge machining device

Abstract

The utility model discloses a grinding wheel electric discharge machining device. The grinding wheel electric discharge machining device comprises a grinding wheel driving unit, an electrode machining unit and a working fluid circulating system, the grinding wheel driving unit limits a through hole in the center of the grinding wheel through the two connecting rods, the transmission shaft is limited in a screw of the grinding wheel and drives the grinding wheel to rotate, and the power device controls the two connecting rods to be attached. According to the grinding wheel electric discharge machining device, efficient and accurate electric discharge machining of the grinding wheel can be achieved, the machining quality and performance of the grinding wheel are improved, the requirement for the high-precision grinding wheel in the machining field is met, and the grinding wheel electric discharge machining device has wide application prospects and remarkable economic benefits.

Description

Technical Field

[0001] This solution relates to the field of electrical discharge machining technology, and in particular to a grinding wheel electrical discharge machining device. Background Technology

[0002] In the field of machining, grinding wheels are commonly used grinding tools. With the increasing demands for machining accuracy and surface quality, traditional grinding wheel processing methods are no longer sufficient to meet certain special requirements. For example, for some high-hardness, high-strength grinding wheel materials, conventional machining methods are not only inefficient but also fail to guarantee machining accuracy and surface quality. Electrical discharge machining (EDM) technology has been widely used in metal processing, but most existing EDM devices are designed for general metal workpieces. For grinding wheels, a special type of workpiece, there is a lack of specially designed, efficient, and precise EDM devices.

[0003] In existing grinding wheel discharge devices, the limiting structure is prone to wear during rotation, causing the grinding wheel to wobble during processing, resulting in substandard processing accuracy and surface quality.

[0004] Therefore, it is necessary to develop a device that can perform high-quality electrical discharge machining on grinding wheels to improve the machining accuracy and performance of grinding wheels and ensure the stability of the grinding wheel machining process. Summary of the Invention

[0005] This solution provides a grinding wheel electrical discharge machining device to address the aforementioned problems.

[0006] To achieve the above objectives, the technical solution adopted in this solution is: a grinding wheel electrical discharge machining device, including a grinding wheel drive unit, an electrode machining unit and a working fluid circulation system in the workstation; the grinding wheel drive unit limits the through hole at the center of the grinding wheel through two connecting rods, the drive shaft is limited in the screw of the grinding wheel and drives the grinding wheel to rotate, and the power device controls the two connecting rods to keep them in contact.

[0007] Furthermore, the grinding wheel drive unit includes a limiting component and a rotating component;

[0008] The limiting component includes a first limiting part and a second limiting part.

[0009] Furthermore, the first limiting part is a gantry bracket, with various structural components symmetrically connected on both sides, including a first limiting hole and a rotating component. The first limiting hole is used to limit the first connecting rod, and the first connecting rod enters and exits the through hole of the grinding wheel after passing through the first limiting hole.

[0010] Furthermore, the second limiting part and the second power device drive the second connecting rod to generate X-axis displacement, maintaining the contact between the second connecting rod and the first connecting rod.

[0011] Further, the rotating assembly, the first power device is connected with the driven wheel through the belt, the driven wheel includes a transmission shaft, the inner thread of the transmission shaft is screwed with the screw thread of the surface of the grinding wheel.

[0012] Further, the electrode processing unit, the displacement assembly is connected with the electrode assembly, the electrode trimming assembly is fixed on the top of the first limiting part, wherein the displacement assembly is controlled by the third driving device, the fourth driving device and the fifth driving device to drive the screw transmission mechanism through the three-dimensional motion platform control system, so that the electrode assembly is controlled to displace along the X-axis, the Y-axis and the Z-axis respectively.

[0013] Further, the electrode assembly includes a pulse power supply, a discharge state monitoring system and a disc electrode clamped by an electrode clamp, and the disc electrode clamped by the electrode clamp is fixed on the bottom of the electrode assembly.

[0014] Further, the electrode clamp is a rotary electrode clamp.

[0015] Further, the support above the disc electrode is fixed with an outlet, and the outlet pipeline is connected with a working fluid circulating system.

[0016] Further, the working fluid circulating system includes a liquid storage bin for storing working fluid and a filter.

[0017] In summary, the scheme has the following advantages:

[0018] The grinding wheel electro-discharge machining device can realize efficient and accurate electro-discharge machining of the grinding wheel, improve the machining quality and performance of the grinding wheel, meet the demand for high-precision grinding wheels in the field of mechanical machining, and has wide application prospect and significant economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the grinding wheel electro-discharge machining device;

[0020] Figure 2 is a schematic view of the device after removing the shell;

[0021] Figure 3 is a schematic view of the device from another angle after removing the shell;

[0022] Figure 4 is a side view of the device after removing the shell;

[0023] Figure 5 is a front view of the device after removing the shell;

[0024] Figure 6 is a schematic view of the electrode trimming assembly.

[0025] Among them:

[0026] 100. Housing; 110. Worktable; 120. Control terminal;

[0027] 200. Grinding wheel drive unit; 210. Limiting assembly; 211. First limiting part; 2111. First limiting hole; 2112. First connecting rod; 212. Second limiting part; 2121. Second power unit; 2122. Second connecting rod; 220. Rotating assembly; 221. First power unit; 222. Belt; 223. Driven wheel; 2231. Drive shaft;

[0028] 300. Electrode processing unit; 310. Displacement assembly; 311. First fixed platform; 3111. First slide rail; 312. Third drive device; 3121. First screw; 3122. First slider; 313. Second fixed platform; 3131. Second slide rail; 314. Fourth drive device; 3141. Second slider; 3142. First fixed frame; 315. Second fixed frame; 3151. Third slide rail; 316. Fifth drive device; 3161. Third screw; 3162. Third slider; 317. Fire extinguishing device; 320. Electrode assembly; 321. Electrode clamp; 322. Disc electrode; 323. Liquid outlet; 330. Electrode trimming assembly;

[0029] 400. Working fluid circulation system; 410. Liquid storage tank; 420. Filter. Detailed Implementation

[0030] The present solution will be further described below with reference to the accompanying drawings and embodiments:

[0031] Example 1:

[0032] A grinding wheel electrical discharge machining device, such as Figures 1-6 As shown, it includes a grinding wheel drive unit 200, an electrode processing unit 300, and a working fluid circulation system 400 within the workstation.

[0033] The workstation includes a worktable 110 inside the housing 100 and a control terminal 120 outside the housing 100. An electrode processing unit 300 and a grinding wheel drive unit 200 are fixed on the worktable 110, and a working fluid circulation system 400 is fixed on the outside of the housing 100. The housing 100 also includes several observation windows for the entry and exit of the grinding wheel and for observing the processing status.

[0034] The grinding wheel drive unit 200 provided by this utility model is used to fix and rotate the grinding wheel, and includes a limiting component 210 and a rotating component 220.

[0035] The limiting assembly 210 provided by the scheme can limit two grinding wheels at a time, and facilitates the replacement and adjustment of the grinding wheels, and comprises a first limiting part 211 and a second limiting part 212, the first limiting part 211 is a gantry support, and two sides are symmetrically connected with each structural assembly, and comprises a first limiting hole 2111 and a rotating assembly 220, the first limiting hole 2111 is used for limiting a first connecting rod 2112, and the first connecting rod 2112 enters and exits a through hole of the grinding wheel after passing through the first limiting hole 2111.

[0036] The rotating assembly 220, a first power device 221 is connected with a driven wheel 223 through a belt 222, a through hole in the center of the driven wheel 223 is aligned with the first limiting hole 2111, and a transmission shaft 2231 on the surface of the driven wheel 223 faces the grinding wheel and is connected with a screw on the surface of the grinding wheel in a threaded mode, the first power device 221 drives the belt 222 to drive the driven wheel 223 to rotate, and the transmission shaft 2231 on the driven wheel 223 drives the grinding wheel to rotate.

[0037] The first power device 221 is a motor in the embodiment, which is used to drive the belt 222 to drive the transmission shaft 2231 to rotate.

[0038] The second limiting part 212, a second power device 2121 drives a second connecting rod 2122 to rotate and enter and exit the through hole in the middle of the grinding wheel, and the second power device is a manual cylinder in the embodiment, which is used to drive the second connecting rod 2122 to rotate. In the scheme, a screw rod and the connecting rod are connected through a nut, when the screw rod rotates, the nut moves along the axial direction of the screw rod, so that the second connecting rod 2122 is driven to generate displacement in the X-axis direction.

[0039] Specifically, the first connecting rod 2112 enters the through hole of the grinding wheel after passing through the first limiting hole 2111, the inner thread of the transmission shaft 2231 is connected with the screw on the surface of the grinding wheel in a threaded mode, the connecting rod is pulled, the second connecting rod 2122 is driven by the second power device to enter the through hole of the grinding wheel and touch the first connecting rod 2112, the first power device 221 drives the belt 222 to drive the driven wheel 223 to rotate, and the transmission shaft 2231 on the driven wheel 223 drives the grinding wheel to rotate.

[0040] In the long-term rotating process of the grinding wheel, the contact surface of the first connecting rod 2112 and the second connecting rod 2122 will be worn. The second limiting part 212 provided by the scheme can continue to push the second connecting rod 2122 to the first connecting rod 2112 direction if the first connecting rod 2112 and the second connecting rod 2122 are worn, so that the two connecting rods are tightly attached to each other, the grinding wheel is prevented from shaking in the machining process, the machining precision and performance of the grinding wheel are improved, and the stability of the grinding wheel in the machining process is ensured.

[0041] The electrode processing unit 300 processes the electrode against the grinding wheel, wherein the displacement assembly 310 is connected to the electrode assembly 320, and the electrode trimming assembly 330 is fixed on the top of the first limiting part.

[0042] The third driving device 312 is limited in the middle of the first fixed table 311, the output shaft of the third driving device 312 is connected to one end of the first screw rod 3121 through a shaft coupling, the first screw rod 3121 is provided with a nut, the nut is fixed to the bottom of the second fixed table 313, the second fixed table 313 is fixed with the first sliding block 3122 on both sides of the bottom and is in sliding connection with the first sliding rail 3111, and the first sliding rail 3111 is fixed on the first fixed table 311.

[0043] The fourth driving device 314 is limited in the middle of the second fixed table 313 and is perpendicular to the third driving device 312, the output shaft of the fourth driving device 314 is connected to one end of the second screw rod through a shaft coupling, the second screw rod is provided with a nut, and the nut is fixed to the bottom of the first fixed frame 3142; the second fixed table 313 is fixed with the second sliding block 3141 on both sides of the bottom and is in sliding connection with the second sliding rail 3131, and the second fixed frame 315 is connected vertically on the side surface, and the second sliding rail 3131 is fixed on the second fixed table 313.

[0044] The fifth driving device 316 is limited in the middle of the second fixed frame 315 and is perpendicular to the fourth driving device 314, the output shaft of the fifth driving device 316 is connected to one end of the third screw rod 3161 through a shaft coupling, the third screw rod 3161 is provided with a nut, and the nut is fixed to the bottom of the electrode assembly 320; the electrode assembly 320 is fixed with the third sliding block 3162 on both sides of the bottom and is in sliding connection with the third sliding rail 3151, and the third sliding rail 3151 is fixed on the second fixed frame 315.

[0045] The second fixed frame 315 further comprises a fire extinguishing device 317, which is fixed beside the electrode assembly 320 and is used for timely extinguishing fire caused by processing.

[0046] Specifically, when the third driving device 312 is started to drive the first screw rod 3121 to rotate, due to the screwing relationship between the first screw rod 3121 and the nut, the nut will move along the axis direction of the first screw rod 3121, that is, the third driving device 312 drives the first screw rod 3121 to drive the second fixed table 313 to move along the X axis in linkage;

[0047] When the fourth driving device 314 on the second fixed table 313 is started, the second screw is driven to rotate, and the principle is the same as that of the third driving device 312, that is, the fourth driving device 314 drives the second screw to drive the first fixed frame 3142 to move along the Y axis together with the second fixed frame 315.

[0048] When the fifth driving device 316 on the upper limit of the first fixed frame 3142 is started, the third screw 3161 is driven to rotate, and the principle is the same as that of the third driving device 312 and the fourth driving device 314, that is, the fifth driving device 316 drives the third screw 3161 to drive the motor assembly and the fire extinguishing device 317 to move along the Z axis.

[0049] The displacement assembly 310 provided in the scheme is a three-dimensional motion platform control system, which controls the electrode assembly 320 to displace along the X axis, the Y axis and the Z axis through the third driving device 312, the fourth driving device 314 and the fifth driving device 316.

[0050] The electrode assembly 320 includes a pulse power supply, a discharge state monitoring system and a disc electrode 322 clamped by an electrode clamp 321.

[0051] The pulse power supply supplies power to the device and can generate a pulse voltage with specific parameters, mainly composed of a power supply circuit, an inverter circuit, a transformer, a capacitor and a controller, etc.

[0052] The discharge state monitoring system is used to monitor various parameters in the discharge process in real time, including discharge voltage, discharge current, discharge gap, etc. The data is obtained through the sensor installed in the discharge circuit, and then transmitted to the control end. Through monitoring the size and stability of the discharge current, it can be judged whether the discharge is normal. If the discharge current appears abnormal fluctuation, it may indicate that the discharge gap changes or the working fluid has a problem. At this time, the system can adjust in time or issue an alarm.

[0053] The electrode clamp 321 clamps the disc electrode 322 fixed at the bottom of the electrode assembly 320. The electrode clamp 321 is a three-jaw chuck or a special magnetic clamp. The electrode clamp 321 in this embodiment is a rotary electrode clamp, which can change the discharge angle of the disc electrode 322 and make the disc electrode 322 rotate. The axial and radial accuracy of the rotary electrode clamp can reach microns, which ensures the stability and accuracy of the rotation of the disc electrode 322.

[0054] The combination of the electrode clamp jaw and the electrode provided in the scheme can adjust the angle after long-term working loss of the disc electrode 322 at an angle, and continuously process the grinding wheel.

[0055] The liquid outlet 323 is fixed on the support near the disc electrode 322, and the pipeline of the liquid outlet 323 is connected with the working liquid circulating system 400. The working liquid is used in the process of the electrical discharge machining, and the working liquid plays the role of insulation, cooling, chip removal, improvement of the discharge state and reduction of the electrode loss. The working liquid can meet the demand of the electrical machining, and in the embodiment, the working liquid is the oil specially used for the electrical discharge machining.

[0056] The electrode trimming assembly 330 is a trimming seat, and contains a diamond trimming tool. The diamond trimming tool has high hardness, and can effectively trim the electrode material. The electrode trimming assembly guarantees the shape precision of the electrode and improves the surface quality of the electrode.

[0057] Specifically, when the electrode needs to be trimmed, the disc electrode 322 is moved by the displacement assembly 310, and the disc electrode 322 is trimmed by the electrode trimming assembly.

[0058] The working liquid circulating system 400 is used for guaranteeing the insulation and cleanliness of the working liquid. The working liquid in the liquid storage bin 410 is filtered by the filter 420, and then is delivered to the liquid outlet 323 in the machining area through the pipeline and is sprayed on the grinding wheel in the form of mist, so as to form a stable liquid film. The stable liquid film guarantees the insulation environment of the electrical discharge machining, effectively cools the machining area, takes away the heat generated by the discharge and the etching products, and ensures the smooth progress of the machining process and the quality of the machining surface.

[0059] In summary, the grinding wheel electrical discharge machining device provided by the application can realize efficient and accurate electrical discharge machining of the grinding wheel, improve the machining quality and performance of the grinding wheel, meet the demand of the mechanical machining field for high-precision grinding wheels, has a wide application prospect and significant economic benefits.

[0060] The above-mentioned embodiments are only for describing the technical concept and characteristics of the application, and the purpose is to enable those skilled in the art to understand the content of the application and implement the application, and cannot limit the protection scope of the application. Any equivalent transformation or modification made according to the spirit and essence of the application should be covered within the protection scope of the application.

[0061] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the connection between two elements inside.

[0062] For those skilled in the art, the specific meanings of the above-mentioned terms in the application can be understood according to the specific circumstances.

[0063] It should be understood that the above-described implementations are merely exemplary, and are not limiting, and that various obvious or equivalent modifications or replacements can be made to the above-described details by those skilled in the art without departing from the essential principles of the present scheme, and all of these modifications or replacements shall be included in the protection scope of the present scheme.

Claims

1. A grinding wheel electrical discharge machining apparatus characterized by comprising: The sand wheel driving unit (200), the electrode processing unit (300) and the working fluid circulating system (400) in the work station are included. The sand wheel driving unit (200) limits the through hole of the sand wheel center through two connecting rods, the transmission shaft (2231) is limited in the screw of the sand wheel and drives the sand wheel to rotate, and the power device controls the two connecting rods to adhere.

2. The grinding wheel electrical discharge machining apparatus according to claim 1, characterized by: The sand wheel driving unit (200) includes a limiting assembly (210) and a rotating assembly (220). The limiting assembly (210) includes a first limiting part (211) and a second limiting part (212).

3. The grinding wheel electrical discharge machining apparatus according to claim 2, characterized by: The first limiting part (211) is a gantry support, and both sides are symmetrically connected with each structural assembly, including a first limiting hole (2111) and a rotating assembly (220), the first limiting hole (2111) is used for limiting a first connecting rod (2112), and the first connecting rod (2112) passes through the first limiting hole (2111) and enters or exits the through hole of the sand wheel.

4. The grinding wheel electrical discharge machining apparatus according to claim 2, characterized by: The second limiting part (212) is driven by a second power device (2121) to generate X-axis displacement of a second connecting rod (2122), and the second connecting rod (2122) and the first connecting rod (2112) adhere to each other.

5. The grinding wheel electrical discharge machining apparatus according to claim 2, characterized by: The rotating assembly (220) is connected with a driven wheel (223) through a belt (222) driven by a first power device (221), the driven wheel (223) includes a transmission shaft (2231), and the inner thread of the transmission shaft (2231) is threadedly connected with the screw on the surface of the sand wheel.

6. The grinding wheel electrical discharge machining apparatus according to claim 1, characterized by: The electrode processing unit (300) includes a displacement assembly (310) connected with an electrode assembly (320), and an electrode trimming assembly (330) fixed on the top of the first limiting part (211), wherein the displacement assembly is controlled by a three-dimensional motion platform control system, a screw transmission mechanism is driven by a third driving device (312), a fourth driving device (314) and a fifth driving device (316), and the electrode assembly (320) is controlled to displace in X-axis, Y-axis and Z-axis directions, respectively.

7. The grinding wheel electrical discharge machining apparatus according to claim 6, characterized by: The electrode assembly (320) includes a pulse power supply, a discharge state monitoring system and a disc electrode (322) clamped by an electrode clamp (321), and the electrode clamp (321) clamps the disc electrode (322) and is fixed on the bottom of the electrode assembly (320).

8. The grinding wheel electrical discharge machining apparatus according to claim 7, characterized by: The electrode clamp (321) is a rotary electrode clamp.

9. The grinding wheel electrical discharge machining apparatus according to claim 7, characterized by: An outlet (323) is fixed on the support above the disc electrode (322), and the outlet (323) is connected with the working fluid circulating system (400) through a pipeline.

10. The grinding wheel electrical discharge machining apparatus according to claim 9, characterized by: The working fluid circulating system (400) includes a liquid storage bin (410) for storing working fluid and a filter (420).

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