A multi-head EDM drilling machine

Abstract

This application provides a multi-head electrical discharge machining (EDM) drilling machine, including: a bed, a worktable, and at least two EDM drilling mechanisms. By setting at least two EDM drilling mechanisms, multiple products of the same specifications can be processed simultaneously, significantly reducing the total processing time for a single batch of products, which is especially suitable for mass production scenarios. If the product requires drilling at multiple locations, the multiple drilling mechanisms can work together to process different drilling points of the product simultaneously, avoiding the time loss of repeatedly moving and adjusting the position of a single mechanism, and significantly improving the number of processed parts and drilling efficiency per unit time. In addition, by setting a waste liquid collection tank, the processing waste liquid can be collected and discharged, avoiding accumulation and pollution or corrosion of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of CNC drilling, specifically to a multi-head EDM drilling machine. Background Technology

[0002] An electrical discharge drilling machine, also known as an electrical discharge punching machine, electrical discharge micro-hole machine, or electrical discharge fine hole generator, works by using a continuously moving, vertically shifting thin copper tube (electrode wire) as an electrode to perform pulsed spark discharge on the workpiece to remove metal and form it. Unlike wire EDM machines and forming machines, its pulsed electrode is a hollow copper rod, with the dielectric passing through a fine hole in the center of the rod for cooling and chip removal.

[0003] With the development of the manufacturing industry, the demand for high-precision and high-efficiency machining technologies is increasing. Electrical discharge machining (EDM) is widely used in aerospace, automotive, and petrochemical industries due to its advantages such as high precision, high efficiency, and low cost.

[0004] In existing technologies, single-head EDM drilling machines are typically used for EDM drilling forming. However, if the product size is large and the number of holes to be processed is high, the efficiency of a single-head CNC drilling machine will be very low, and the corresponding equipment cost will increase. To improve efficiency, some EDM drilling machines adopt a multi-head structure; however, existing multi-head structure equipment is usually bulky and inconvenient for operators. This is especially true when processing large products, as product fixation and observation become difficult.

[0005] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a multi-head EDM drilling machine to improve processing efficiency and facilitate the fixing and processing of large-sized products.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is a multi-head electrical discharge machining (EDM) machine, comprising: a bed;

[0008] A workbench is provided on the bed, and the workbench includes a water tray and a table surface; the table surface is connected to the bed and is provided above the water tray, and a waste liquid collection tank is formed between the outer side of the table surface and the inner side wall of the water tray.

[0009] At least two electrical discharge drilling mechanisms are distributed around the worktable and mounted on the bed; each electrical discharge drilling mechanism includes a spindle head and a drive module, the spindle head is connected to the drive module and can move under the drive of the drive module to perform electrical discharge drilling on the product on the worktable.

[0010] In the above solution, multiple EDM drilling mechanisms are set up to achieve simultaneous processing at multiple stations, thereby improving processing efficiency; at the same time, a waste liquid collection tank is used to collect processing waste liquid, avoiding waste liquid pollution of equipment and environment.

[0011] In a further technical solution, the platform is cylindrical, the water tray is a disc, and the platform and the water tray are coaxially arranged.

[0012] In the above scheme, the coaxial cylindrical table and the disc water tray structure make the overall layout of the workbench more symmetrical and compact, which facilitates the subsequent arrangement of processing mechanisms around the circumference of the workbench and also helps the waste liquid to flow evenly to the collection tank.

[0013] In a further technical solution, multiple evenly spaced grooves are formed on the table surface along its own radial direction, and at least one product locking component is provided in each groove; the product locking component is used to connect with the product to be processed and fix the product to be processed on the table surface.

[0014] In the above solution, radial grooves and product locking components can be used to adapt to products of different sizes, enabling flexible product fixation and improving the equipment's compatibility with products of different specifications.

[0015] In a further technical solution, the cross-section of the slide groove is T-shaped, and the product locking component is a T-shaped block adapted to the slide groove; the lower part of the T-shaped block is engaged in the slide groove and can slide along the radial extension direction of the slide groove.

[0016] In the above solution, the matching structure of the T-shaped groove and the T-shaped block can not only ensure that the product locking part slides stably along the groove, but also prevent the locking part from falling off from the top of the groove, thereby improving the stability of the fixing structure and the sliding reliability.

[0017] In a further technical solution, an upwardly inclined contact surface is provided on each of the two opposite inner sidewalls of the slide groove; the product locking member has inclined surfaces on both sides corresponding to the contact surfaces; when the product locking member is pulled up, its inclined surfaces on both sides are tightly attached to and abut against the contact surfaces of the slide groove.

[0018] In the above solution, the cooperation between the inclined contact surface and the adapting inclined surface can achieve self-locking when the product locking part is pulled up, further enhancing the product's fixation and preventing product displacement during processing from affecting processing accuracy.

[0019] A further technical solution also includes a baffle plate, which is detachably connected to the outer periphery of the water tray; the baffle plate includes a plurality of arc-shaped baffle pieces, each of which is detachably connected to the water tray.

[0020] In the above solution, the detachable arc-shaped water baffle forms a water baffle plate, which can not only prevent water from splashing out during the processing, but also facilitate the individual disassembly and replacement of damaged water baffles, reducing maintenance costs and difficulty.

[0021] In a further technical solution, a rotating mechanism is also provided inside the bed, and the table is connected to the bed through the rotating mechanism. The rotating mechanism includes a servo motor, a gearbox, and a coupling. The output end of the servo motor is connected to the coupling through the gearbox, and the coupling is fixedly connected to the bottom center of the table and can drive the table to rotate around its own central axis.

[0022] In the above solution, the servo motor-driven rotary mechanism drives the table to rotate, which can realize the circumferential position adjustment of the product on the table. Combined with the multi-hole drilling mechanism, it can realize continuous processing of different positions of the product, improving processing flexibility and efficiency.

[0023] In a further technical solution, the drive module includes a crossbeam assembly, a column assembly, and a ram assembly; the crossbeam assembly is fixedly mounted on the bed, arranged along the Y-axis and parallel to the tangent of the worktable; the column assembly is vertically arranged along the Z-axis and is drivenly connected to the crossbeam assembly, and the column assembly is movable along the Y-axis; the ram assembly is horizontally arranged along the X-axis and is drivenly connected to the column assembly, and the ram assembly is movable along the X-axis; the spindle head is drivenly connected to the ram assembly and is movable along the Z-axis.

[0024] In the above solution, the moving components in the X, Y, and Z axes work together to enable the spindle head to move flexibly in three-dimensional space, accurately aligning with the product processing position, meeting the processing requirements of different perforation positions, and improving processing accuracy and range.

[0025] In a further technical solution, the number of the electrical discharge drilling mechanism is two. The two electrical discharge drilling mechanisms are respectively arranged on both sides of the worktable and are mirror-symmetrical about the center of the worktable. The two electrical discharge drilling mechanisms can process the products on the worktable simultaneously.

[0026] In the above scheme, the two symmetrically arranged drilling mechanisms process synchronously, which can handle the processing tasks at symmetrical positions on the table at the same time, greatly improving the processing efficiency per unit time. Moreover, the symmetrical layout makes the equipment more evenly stressed, reducing the impact of processing vibration on accuracy.

[0027] In a further technical solution, the bed has a notch formed at the connection position between the worktable and each of the EDM drilling mechanisms; the two notches are located on the same side of the worktable, forming a continuous control operation area; it also includes a controller for controlling the operation of the equipment, the controller being positioned towards the control operation area.

[0028] In the above scheme, the notch forms a continuous control operation area, and the controller faces this area, which makes it convenient for the operator to centrally control and operate the two punching mechanisms in the same position, reducing the movement distance during operation and improving the convenience of operation and work efficiency.

[0029] The multi-head EDM drilling machine provided in this application has the following technical advantages:

[0030] By setting up at least two EDM drilling mechanisms distributed along the circumference of the worktable, multi-station parallel processing can be achieved. On the one hand, multiple products of the same specifications can be processed simultaneously, significantly reducing the total processing time for a single batch of products, which is especially suitable for mass production scenarios. On the other hand, if the product requires drilling at multiple locations, multiple drilling mechanisms can work together to process different drilling points of the product simultaneously, avoiding the time loss caused by a single mechanism repeatedly moving and adjusting its position, and significantly improving the number of processed parts and drilling efficiency per unit time. In addition, the waste liquid collection tank formed by the outer side of the table and the inner side of the water pan can achieve directional collection of processing waste liquid, preventing waste liquid from flowing indiscriminately and contaminating key components such as the machine bed and drive module. At the same time, it prevents waste liquid residue on the table or equipment surface from affecting the product positioning accuracy, indirectly ensuring the dimensional accuracy and product quality of the drilling process. Attached Figure Description

[0031] Appendix Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0032] Appendix Figure 2 This is a front view of an embodiment of the present utility model;

[0033] Appendix Figure 3 This is a top view of an embodiment of the present utility model;

[0034] Appendix Figure 4 This is a schematic diagram of the structure of the tabletop according to an embodiment of the present utility model;

[0035] Appendix Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0036] In the attached diagrams: 1-Bed; 11-Notch; 12-Control operation area; 2-Workbench; 21-Water tray; 22-Table surface; 221-Slide groove; 222-Product locking component; 23-Waste liquid collection tank; 24-Water baffle; 3A-First EDM drilling mechanism; 3B-Second EDM drilling mechanism; 31-Spindle head; 32-Crossbeam assembly; 33-Column assembly; 34-Roller assembly; 4-Controller; 51-Contact surface. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0039] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0040] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0041] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0042] See appendix Figure 1 To be continued Figure 3 This embodiment provides a multi-head electrical discharge machining (EDM) machine designed to meet the needs of batch product drilling. The machine consists of a bed 1, a worktable 2, and two EDM drilling mechanisms. In possible embodiments, more EDM drilling mechanisms can be arranged around the worktable 2; for example, three EDM drilling mechanisms can be arranged in a semi-enclosed manner around the worktable 2.

[0043] The machine bed 1 serves as the basic support structure for the equipment, and the worktable 2 and two EDM drilling machines are all mounted on the machine bed 1. Recesses 11 are formed at the connection points between the worktable 2 and the EDM drilling mechanisms. These recesses 11 are all located on the same side of the worktable 2, and adjacent recesses 11 together form a continuous control and operation area 12. This allows operators to monitor and operate the equipment within the same area without having to frequently move between the two sides of the equipment.

[0044] As shown in the attached figure Figure 1 To be continued Figure 3 As shown, preferably, the worktable 2 can be a circular worktable, but this application is not limited to this and can also make other shapes such as rectangles and polygons.

[0045] Next to the control operation area 12, there is also a controller 4 for controlling the operation of the equipment. The operation panel of the controller 4 is integrated with the display and is arranged facing the control operation area 12. While observing the processing process, the operator can directly view the processing parameters on the display, such as current, voltage and processing progress. The operator can also quickly adjust the parameters through the operation panel to reduce the range of operation and reduce fatigue during long-term operation.

[0046] The workbench 2 mainly consists of a water tray 21, a work surface 22, and a baffle plate 24. The water tray 21 is disc-shaped and made of stainless steel. Due to the excellent corrosion resistance of stainless steel, it can be in contact with waste liquid generated during processing for a long time without easily rusting, avoiding water leakage problems caused by corrosion and extending the service life of the water tray 21. A drain hole (not shown in the figure) is opened at the bottom of the water tray 21. This drain hole is sealed to the external drainage pipe to ensure that the waste liquid can be discharged in an orderly manner without leakage.

[0047] The work surface 22 is cylindrical in shape and coaxially positioned above the water tray 21. It can be connected to the bed 1 via support columns or other structures. In this embodiment, the work surface 22 is made of marble. Marble has good thermal stability and rigidity, and can maintain good flatness during long-term use, providing a stable processing benchmark for the products to be processed. At the same time, the surface of marble is dense and does not easily absorb waste liquid and impurities, making it easier to clean after processing.

[0048] A gap is left between the outer periphery of the work surface 22 and the inner wall of the water tray 21 to form a waste liquid collection tank 23. Waste liquid generated during processing can flow along the work surface 22 into the waste liquid collection tank 23 and then be discharged through the drain hole at the bottom, thus preventing waste liquid from accumulating on the work surface 22 and contaminating products or equipment parts.

[0049] The baffle plate 24 is detachably connected to the outer circumference of the water tray 21. When processing is required, the baffle plate 24 can be installed on the outer circumference of the water tray 21 to prevent waste liquid from splashing outwards, thus preventing waste liquid from contaminating the machine bed 1, drive module, or ground, and reducing the workload of subsequent equipment cleaning. When not processing, the baffle plate 24 can be removed. The baffle plate 24 can be composed of multiple arc-shaped baffle plates, each of which is detachably connected to the water tray 21. This allows for the removal and installation of only a portion of the arc-shaped baffle plates without removing the entire baffle plate 24. The baffle plate 24 is preferably made of transparent plexiglass, allowing operators to directly observe the processing status of the worktable through the baffle plate 24 without disassembling it to obtain information such as the electrode wire position and product clamping status.

[0050] like Figure 4As shown, the table surface 22 has multiple evenly spaced grooves 221 along its radial direction. The cross-section of the grooves 221 is T-shaped. Each groove 221 is fitted with at least one product locking element 222, which is a T-shaped block that matches the T-shaped groove 221. The lower part of the product locking element 222 is engaged in the groove of the groove 221, allowing it to slide freely along the radial extension direction of the groove 221 to adjust its relative position with the product to be processed, adapting to the clamping requirements of products of different sizes. It also prevents the product from detaching upward from the groove 221 when clamping, ensuring the stability of the fixing process.

[0051] The top of the product locking component 222 has a bolt hole. During use, the product to be processed is placed on the table 22. After moving the T-block to the appropriate position, the fastening bolt is passed through the bolt hole on the product locking component 222 and contacts the product. The bolt is then tightened, applying downward pressure to the product and simultaneously lifting the product locking component 222 upwards. Figure 5 As shown, correspondingly, each of the two opposite inner sidewalls of the slide groove 221 is provided with an upwardly inclined contact surface 51. The corresponding positions on both sides of the lower part of the product locking member 222 are also provided with inclined surfaces adapted to the contact surface 51. When the product locking member 222 is lifted upward, the inclined surfaces on both sides are tightly attached to the contact surface 51 of the inner wall of the slide groove 221 and abut against each other. The T-block is fixed in the slide groove 221 by the wedge self-locking principle. No additional locking components are required, which simplifies the fixing structure and ensures that the product will not move radially after fixing, thus ensuring the positional accuracy of the perforation process.

[0052] In this embodiment, the first EDM drilling mechanism 3A and the second EDM drilling mechanism 3B are mirror-symmetrical about the center of the worktable 2 and are respectively arranged on both sides of the worktable 2. The two mechanisms can process the products on the table 22 simultaneously, greatly improving the batch processing efficiency. Each EDM drilling mechanism includes a spindle head 31 and a drive module. The spindle head 31 is used to install electrode wires to realize the EDM drilling of the products. It is connected to the drive module and moves under the drive of the drive module.

[0053] Specifically, the drive module consists of a crossbeam assembly 32, a column assembly 33, and a slide assembly 34. The crossbeam assembly 32 is fixedly mounted on the bed 1, and its extension direction is parallel to the tangential direction of the worktable 2, i.e. Figure 1 The column assembly 33 is positioned along the vertical Z-axis and is connected to the crossbeam assembly 32 via a transmission connection. The column assembly 33 can move along the extension direction of the crossbeam assembly 32. The slide assembly 34 is positioned perpendicular to the crossbeam assembly 32, i.e. Figure 1The slide assembly 34 is horizontally positioned along the X-axis and is connected to the column assembly 33 via a drive mechanism, allowing it to move along the X-axis. The spindle head 31 is vertically positioned and connected to the slide assembly 34 via a drive mechanism, and the spindle head 31 can move up and down along the Z-axis.

[0054] Through the transmission and cooperation of the crossbeam assembly 32, column assembly 33, slide assembly 34 and spindle head 31, three-dimensional movement can be achieved to adapt to the perforation requirements of different positions of the product.

[0055] In a possible embodiment, the slide assembly 34 can move vertically along the column assembly 33, forming axis W1, to quickly adjust the height over a large range. The raising and lowering of the spindle head 31 forms axis W2, to precisely adjust the height over a smaller range. Through the cooperation of axes W1 and W2, holes at different height positions can be machined quickly and efficiently.

[0056] In this embodiment, the crossbeam assembly 32, column assembly 33, and slide assembly 34 all employ a ball screw combined with a servo motor transmission method, which has high transmission efficiency and precision. This effectively reduces errors during the movement of each component, ensuring the positioning accuracy of the spindle head 31. Simultaneously, the components move in a fixed direction, avoiding mutual interference and improving the stability of equipment operation. In a possible embodiment, a linear motor can also be used as the drive mechanism, working in conjunction with a linear guide rail to achieve transmission.

[0057] Preferably, a rotating mechanism (not shown in the figure) can be installed inside the bed 1. This rotating mechanism consists of a servo motor, a gearbox, and a coupling. The output end of the servo motor is connected to the gearbox, and the output end of the gearbox is fixedly connected to the bottom center of the table 22 via the coupling. During operation, after the servo motor starts, the power is reduced and the torque is increased by the gearbox, and then transmitted to the table 22 through the coupling, causing the table 22 to rotate around its own central axis. The servo motor can achieve precise control, and together with the gearbox, it can ensure that the table 22 can still rotate smoothly under load. At the same time, it can achieve precise indexing of the table 22 according to processing requirements, meeting the needs of multi-station drilling processing in the circumferential direction of the product.

[0058] During actual processing, the product to be processed is first placed on the table surface 22 of the workbench 2. According to the product size and the position of the processing holes, the T-block is moved to the appropriate position along the radial slide 221. The fastening bolt is passed through the bolt hole on the T-block and tightened. While the bolt is pressing the product, it drives the T-block to lift upward, so that the inclined surface of the T-block is tightly pressed against the contact surface 51 of the slide 221, thus fixing the product. Then, the processing parameters, such as the drilling depth and processing speed, are set through the controller 4. After the equipment is started, the drive modules of the two EDM drilling mechanisms drive the spindle head 31 to move to the designated processing position. After the spindle head 31 is started, it performs EDM drilling on the product. The waste liquid generated during the processing flows along the table surface 22 into the waste liquid collection tank 23, and then is discharged through the drain hole and sealed pipe at the bottom of the water pan 21. During the processing, the operator can observe the processing status through the transparent baffle 24 and can also adjust the parameters in real time through the controller 4 in the control operation area 12 to ensure that the processing process is stable until all holes are processed.

[0059] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-head electrical discharge machining (EDM) machine, characterized in that, include: Bed frame (1); A workbench (2) is provided on the bed (1). The workbench (2) includes a water tray (21) and a table surface (22). The table surface (22) is connected to the bed (1) and is provided above the water tray (21). A waste liquid collection tank (23) is formed between the outer side of the table surface (22) and the inner side wall of the water tray (21). At least two electrical discharge drilling mechanisms are distributed around the worktable (2) and set on the bed (1); each electrical discharge drilling mechanism includes a spindle head (31) and a drive module. The spindle head (31) is connected to the drive module and can move under the drive of the drive module to perform electrical discharge drilling on the product on the table (22).

2. The multi-head EDM drilling machine according to claim 1, characterized in that: The platform (22) is cylindrical, the water tray (21) is a disc, and the platform (22) and the water tray (21) are coaxially arranged.

3. The multi-head EDM drilling machine according to claim 2, characterized in that: The tabletop (22) has multiple evenly spaced grooves (221) along its radial direction. Each groove (221) is provided with at least one product locking component (222). The product locking component (222) is used to connect with the product to be processed and fix the product to be processed on the tabletop (22).

4. The multi-head EDM drilling machine according to claim 3, characterized in that: The slide groove (221) has a T-shaped cross section, and the product locking member (222) is a T-shaped block adapted to the slide groove (221); the lower part of the T-shaped block is locked in the slide groove (221) and can slide along the radial extension direction of the slide groove (221).

5. The multi-head EDM drilling machine according to claim 4, characterized in that: On the two opposite inner sidewalls of the slide groove (221), there is an upwardly inclined contact surface (51); the product locking member (222) has inclined surfaces on both sides that are adapted to the contact surface (51); when the product locking member (222) is pulled up, its inclined surfaces on both sides are tightly attached to the contact surface (51) of the slide groove (221) and abut against each other.

6. The multi-head EDM drilling machine according to claim 2, characterized in that: It also includes a baffle plate (24), which is detachably connected to the outer periphery of the water tray (21); the baffle plate (24) includes a plurality of arc-shaped baffles, each of which is detachably connected to the water tray (21).

7. The multi-head EDM drilling machine according to claim 2, characterized in that: The bed (1) is also provided with a rotating mechanism. The table (22) is connected to the bed (1) through the rotating mechanism. The rotating mechanism includes a servo motor, a gearbox and a coupling. The output end of the servo motor is connected to the coupling through the gearbox. The coupling is fixedly connected to the bottom center of the table (22) and can drive the table (22) to rotate around its own central axis.

8. The multi-head EDM drilling machine according to claim 2, characterized in that: The drive module includes a beam assembly (32), a column assembly (33), and a ram assembly (34); The crossbeam assembly (32) is fixedly mounted on the bed (1), and is arranged along the Y-axis and parallel to the tangent of the worktable (2); The column assembly (33) is vertically arranged along the Z-axis and is connected to the beam assembly (32) in a transmission manner. The column assembly (33) is capable of moving along the Y-axis. The slide assembly (34) is horizontally arranged along the X-axis and is connected to the column assembly (33) in a transmission manner. The slide assembly (34) is capable of moving along the X-axis. The spindle head is connected to the slide assembly (34) and can move along the Z-axis.

9. The multi-head EDM drilling machine according to claim 2, characterized in that: The number of the electrical discharge drilling mechanism is two. The two electrical discharge drilling mechanisms are respectively set on both sides of the worktable (2) and mirror symmetrical about the center of the worktable (2). The two electrical discharge drilling mechanisms can process the products on the table (22) simultaneously.

10. The multi-head EDM drilling machine according to claim 9, characterized in that: The bed (1) has a notch (11) formed at the connection position between the worktable (2) and each of the electrical discharge drilling mechanisms; the two notches (11) are located on the same side of the worktable (2) to form a continuous control operation area (12). The multi-head electrical discharge drilling machine also includes a controller (4), which is set towards the control operation area (12).

Images