Grooving machine for current-conducting plate of power electronic module

Abstract

The utility model discloses a grooving machine for a current-conducting plate of a power electronic module. The grooving machine comprises a machine frame, a longitudinal sliding rail fixedly connected to the machine frame, a clamping mechanism connected to the sliding rail in a sliding mode, a feeding mechanism arranged on the machine frame and a cutting mechanism arranged above the clamping mechanism and used for grooving a workpiece. The clamping mechanism comprises two clamping blocks and a longitudinal clamping air cylinder arranged between the two clamping blocks, one clamping block is connected with the feeding mechanism, the top of each clamping block is provided with a semicircular clamping hole used for clamping a workpiece to be machined, and the axis of each clamping hole is vertical. Clamping and loosening of the workpiece are automatically conducted through the clamping air cylinder, clamping through a three-jaw chuck is not needed, and therefore time and labor are saved, and machining efficiency is higher. Besides, the workpiece is clamped through the clamping hole, so that the contact area of the clamping block and the workpiece is larger, the workpiece can be prevented from generating clamping marks due to clamping, and the appearance quality of the workpiece is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of machining equipment, in particular to a slotting machine for a conductive plate of a power electronic module. Background Art

[0002] A workpiece used in a power electronics module is a conductive plate. This plate is disc-shaped and made of copper. One side of the workpiece has a rectangular through-slot cut radially. The through-slot is typically machined on a milling machine. A three-jaw chuck is fixed to the milling machine's worktable. During machining, the conductive plate to be machined is first placed on the three-jaw chuck. A special wrench is used to tighten the chuck's nut, causing the three jaws of the three-turn chuck to clamp the outer diameter of the plate. The milling machine's worktable then drives the three-jaw chuck in a horizontal linear feed motion. The milling cutter machines a through-slot on one side of the plate. The chuck's nut is then tightened with a special wrench to loosen the plate. The machined plate is then removed, and another plate to be machined is placed in place. The above steps are repeated to continue machining.

[0003] Because each conductive plate requires the operator to use a dedicated wrench to tighten the nut on the three-jaw chuck, clamping the workpiece is time-consuming and labor-intensive, resulting in low work efficiency. Furthermore, since the conductive plates are made of relatively soft copper, the three-jaw chuck's three jaws can easily leave clip marks on the outer diameter of the plates, affecting product quality.

[0004] Patent publication number CN215147273U discloses an easy-to-use CNC drilling and milling machine, including a base, a lifting mechanism, and a locking mechanism. It uses a T-slot to lock the fixture of the workpiece to be processed to the workbench, making it impossible to achieve automatic clamping. Furthermore, after the workpiece is clamped, its center cannot be aligned with the tool, requiring alignment with a CNC drilling and milling machine, which is expensive to purchase and use. Patent publication number CN221503612U discloses an automatic grooving device, including a transverse guide rail fixed to the milling machine workbench, a longitudinal guide rail provided in the transverse guide rail, the longitudinal guide rail connected to a transverse cylinder, and a workpiece fixture provided in the longitudinal guide rail. This device also suffers from the problem of not being able to automatically align the workpiece with the tool after it is clamped. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a slotting machine for a conductive plate of a power electronic module, so as to solve the problem of low efficiency in slotting the conductive plate at present.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A slotting machine for conductive plates of power electronic modules, comprising a frame, a longitudinal slide rail fixedly connected to the frame, a clamping mechanism slidably connected to the slide rail, a feed mechanism arranged on the frame for driving the clamping mechanism to move longitudinally along the slide rail, and a cutting mechanism arranged above the clamping mechanism for slotting the workpiece; the clamping mechanism comprises two clamping blocks and a driving mechanism arranged between the two clamping blocks for driving the two clamping blocks to move closer to or away from each other, the two ends of the driving mechanism are respectively hinged to the corresponding clamping blocks, the clamping blocks are all slidably connected to the slide rail, one of the clamping blocks is connected to the feed mechanism, and the top of each clamping block is provided with a semicircular clamping hole for clamping the workpiece to be processed, and the axis of the clamping hole is vertical.

[0008] Furthermore, the feed mechanism includes a screw arranged next to the slide rail and a feed motor fixedly arranged on the frame. The feed motor is transmission-connected to the screw, the screw is rotationally connected to the frame, the screw is parallel to the slide rail, and a nut is fixedly connected under one of the clamping blocks, and the nut is threadedly connected to the screw.

[0009] Furthermore, the cutting mechanism includes a drive shaft rotatably connected to the frame, a cutter disc fixedly connected to one end of the drive shaft, and a drive motor fixedly connected to the frame. The drive motor is transmission-connected to the drive shaft, the axis of the cutter disc is perpendicular to the slide rail, and the symmetrical planes of the two end faces of the cutter disc pass through the center of the mounting hole.

[0010] Furthermore, an ejection hole is provided through the bottom of the clamping hole, and a vertical unloading cylinder is fixedly connected to the bottom surface of one of the clamping blocks at the position of the ejection hole. The push rod of the unloading cylinder is coaxial with the ejection hole, and the diameter of the push rod of the unloading cylinder is smaller than the diameter of the ejection hole.

[0011] Furthermore, the top of each clamping block is provided with a cutter groove for allowing the upper portion of the clamping block to pass longitudinally through the cutter disc.

[0012] Furthermore, the frame is fixedly provided with a funnel and a cutting fluid tank in sequence from top to bottom below the cutting mechanism. The cutting fluid tank is filled with cutting fluid. A cutting fluid pump is provided on the cutting fluid tank. When the cutting mechanism cuts the workpiece, the cutting fluid pump extracts the cutting fluid in the cutting fluid tank and sprays it onto the processing part of the workpiece through the pipeline.

[0013] Furthermore, a reflux port is provided on the top of the cutting fluid box, and a filter screen is covered on the reflux port on the top of the cutting fluid box.

[0014] Furthermore, the driving mechanism is one of a longitudinally arranged clamping cylinder, an electric push rod, and a hydraulic cylinder.

[0015] The positive effects of this utility model are:

[0016] The utility model features a pair of longitudinally opening and closing clamping blocks. A workpiece is clamped by the clamping blocks via a clamping cylinder and fed longitudinally by a feed mechanism. A cutterhead positioned above the feed mechanism cuts a through-groove in the workpiece. The feed mechanism then moves the workpiece to its initial position, and the clamping cylinder releases the workpiece, thereby completing the slotting process. The workpiece is automatically clamped and released by the clamping cylinder, eliminating the need for clamping with a three-jaw chuck. This saves time and effort, and improves processing efficiency. Furthermore, since the workpiece is clamped through the clamping holes, the contact area between the clamping blocks and the workpiece is increased, preventing clamping marks on the workpiece, ensuring the workpiece's appearance quality, and providing more secure clamping. Furthermore, the workpiece automatically aligns after clamping, aligning its center with the cutterhead. This eliminates the need for lateral adjustment of the workpiece's position, thereby ensuring that the machined through-groove passes through the center of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the appearance drawing of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model viewed from the left front;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model viewed from the right front;

[0020] Figure 4 It is a structural diagram of the clamping mechanism and the feeding mechanism;

[0021] Figure 5 Schematic diagram of the structure of the clamping mechanism after removing the movable plate and clamping block on the right;

[0022] In the picture:

[0023] 1. Frame; 2. Protective cover; 3. Cooling chamber; 4. Clamping mechanism; 5. Cutting mechanism; 6. Feed mechanism; 7. Cutting fluid pump; 8. Funnel; 9. Filter; 10. Cutting fluid tank; 11. Clamping cylinder; 12. Side panel; 13. Clamping block; 14. Movable plate; 15. Clamping hole; 16. Cutter head; 17. Drive shaft; 18. Bearing box; 19. Support plate; 20. Slide rail; 21. Screw; 22. Feed motor; 23. Ejector hole; 24. Unloading cylinder; 25. Nut; 26. Slider; 27. Cutter groove; 28. Drive motor; 29. ​​Mounting plate. DETAILED DESCRIPTION

[0024] For the convenience of description, in the following description, the direction consistent with the slide rail 20 is referred to as “longitudinal”, and the direction perpendicular to the slide rail 20 in the horizontal plane is referred to as “transverse”.

[0025] Example 1

[0026] like Figures 1 to 5As shown, a slotting machine for conductive plates in power electronic modules comprises a frame 1 formed of welded profiles in a rectangular frame structure. A horizontal rectangular mounting plate 29 is fixedly connected to the top of the frame 1. Two longitudinal support plates 19 are fixedly connected to the front of the mounting plate 29. The two support plates 19 are parallel to each other, and a longitudinal slide rail 20 is fixedly connected to the top surface of each support plate 19. A clamping mechanism 4 is slidably connected to the two slide rails 20. A feed mechanism 6 is provided on the frame 1 for driving the clamping mechanism 4 longitudinally along the slide rails 20. A cutting mechanism 5 is provided above the clamping mechanism 4 for slotting the workpiece. A rectangular protective cover 2 covers the top of the frame 1, with a door on the side corresponding to the slide rail 20. The support plates 19, slide rails 20, clamping mechanism 4, feed mechanism 6, and cutting mechanism 5 are all disposed within the protective cover 2.

[0027] The clamping mechanism 4 includes two rectangular clamping blocks 13. The bottom surface of each clamping block 13 is fixedly connected to a rectangular movable plate 14. Both sides of the two movable plates 14 are fixedly connected to L-shaped side plates 12. A longitudinal clamping cylinder 11 is provided between the two side plates 12 on the same side. The two ends of each clamping cylinder 11 are hinged to the two side plates 12 on the same side. The bottom surface of each clamping block 13 is fixedly connected to a pair of sliders 26. The sliders 26 are slidably connected to corresponding slide rails 20. The right clamping block 13 is connected to the feed mechanism 6. The top of each clamping block 13 is provided with a semicircular clamping hole 15 with a shape corresponding to the workpiece to be processed. The bottom surface of each clamping hole 15 is flat, and the axis of each clamping hole 15 is vertical. The workpiece to be processed is placed in the clamping hole 15. When the clamping cylinder 11 is activated, it drives the two clamping blocks 13 to open and close longitudinally, thereby clamping or loosening the workpiece.

[0028] The feed mechanism 6 includes a longitudinal lead screw 21 arranged between the two slide rails 20 and a feed motor 22 fixedly arranged on the right side of the mounting plate 29. The feed motor 22 is a servo motor. The feed motor 22 is connected to the lead screw 21 through a coupling. Both ends of the lead screw 21 are provided with bearing seats, and the bearing seats are fixedly connected to the mounting plate 29 by screws. The two ends of the lead screw 21 are rotatably connected to the mounting plate 29 through corresponding bearing seats. The lead screw 21 is parallel to the slide rail 20, and a nut 25 is fixedly connected under the movable plate 14 on the right, and the nut 25 is threadedly connected to the lead screw 21.

[0029] When the feed motor 22 is running, the two clamping blocks 13 are driven to move longitudinally through the lead screw 21 and the nut 25, thereby realizing longitudinal feeding of the workpiece.

[0030] The cutting mechanism 5 comprises a bearing housing 18 fixedly connected to the rear surface of the mounting plate 29, a transverse drive shaft 17 rotatably connected to the bearing housing 18, and a cutterhead 16 fixedly connected to the front end of the drive shaft 17. The axis of the cutterhead 16 is transverse, and the symmetrical planes of the front and rear end surfaces of the cutterhead 16 pass through the center of the mounting hole 15. A drive motor 28 is fixedly connected to the rear end of the frame 1 and is connected to the rear end of the drive shaft 17 via a belt drive. When the workpiece to be machined is clamped between the two clamping blocks 13, the lower end of the cutterhead 16 is lower than the top surface of the workpiece. The distance between the lower end of the cutterhead 16 and the top surface of the workpiece is the depth of the groove machined in the workpiece. Each clamping block 13 has a cutter clearance groove 27 at the top, which passes through the center of the mounting hole 15. When the clamping block 13 drives the workpiece longitudinally, the bottom of the cutterhead 16 passes through the cutter clearance groove 27, preventing the cutterhead 16 from damaging the clamping block 13.

[0031] The working process of this utility model is:

[0032] 1. In the initial state, the clamping block 13 maintains the left end of the slide rail 20. The workpiece to be processed is placed in the clamping hole 15. The bottom of the workpiece is flush with the bottom surface of the clamping hole 15. At this time, the top surface of the workpiece is horizontal. The two clamping cylinders 11 are activated to clamp the workpiece.

[0033] 2. The feed motor 22 rotates forward to drive the workpiece to feed longitudinally. At the same time, the drive motor 28 drives the cutter head 16 to rotate, cutting the workpiece passing through the bottom of the cutter head 16 and cutting a through groove on the workpiece.

[0034] 3. After the cutting is completed, the feed motor 22 reverses to move the workpiece to the left end of the slide rail 20. The two clamping cylinders 11 are actuated to release the workpiece, and then the next workpiece to be processed is replaced.

[0035] Workpiece clamping and release are automatically performed by the clamping cylinder 11, eliminating the need for a three-jaw chuck. This saves time and effort, resulting in higher processing efficiency. Furthermore, since the workpiece is clamped through the clamping hole 15, the contact area between the clamping block 13 and the workpiece is larger, preventing clamping marks on the workpiece, ensuring a high-quality appearance, and providing a more secure clamping experience.

[0036] Example 2

[0037] The difference between this embodiment and embodiment 1 is that:

[0038] A semicircular ejection hole 23 is provided through the center of the bottom of the clamping hole 15. A vertical unloading cylinder 24 is fixedly connected to the bottom surface of the left movable plate at the position of the ejection hole 23. The push rod of the unloading cylinder 24 is coaxial with the ejection hole 23, and the diameter of the push rod of the unloading cylinder 24 is smaller than the diameter of the ejection hole 23.

[0039] When the through groove is processed, the workpiece moves to the left end of the slide rail 20, the two clamping cylinders 11 are actuated to release the workpiece, and the unloading cylinder 24 is actuated, and its push rod moves upward to push the processed workpiece out of the clamping hole 15, thereby realizing automatic unloading and further improving processing efficiency.

[0040] Example 3

[0041] The difference between this embodiment and embodiment 2 is that:

[0042] The frame 1 is provided with a cooling chamber 3. A funnel 8 and a cutting fluid tank 10, both fixedly connected to the frame 1, are fixedly mounted below the cutting mechanism 5 in descending order from top to bottom within the cooling chamber 3. A hole is formed in the mounting plate 29 at a position corresponding to the funnel 8. The cutting fluid tank 10 is filled with cutting fluid and is equipped with a cutting fluid pump 7. When the cutting mechanism 5 is cutting a workpiece, the cutting fluid pump 7 draws the cutting fluid from the cutting fluid tank 10, which is then piped to the cutterhead 16 and sprayed onto the workpiece.

[0043] A reflux port is provided on the top of the cutting fluid tank 10 , and a filter screen 9 is provided on the top of the cutting fluid tank 10 at the reflux port for filtering and recovering the copper chips produced by cutting.

[0044] The above-mentioned embodiments are described in a relatively detailed and specific manner, expressing preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, they are not limited to the present invention alone, and the patent scope of the present invention cannot be limited solely by these embodiments. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in this field, without departing from the structure of the present invention, local improvements within the system and changes and conversions between subsystems, etc., are still within the patent scope of the present invention.

Claims

1. A slotting machine for conductive plates of power electronic modules, characterized in that: The invention comprises a frame (1), a longitudinal slide rail (20) fixedly connected to the frame (1), a clamping mechanism (4) slidably connected to the slide rail (20), a feeding mechanism (6) arranged on the frame (1) for driving the clamping mechanism (4) to move longitudinally along the slide rail (20), and a cutting mechanism (5) arranged above the clamping mechanism (4) for grooving a workpiece; the clamping mechanism (4) comprises two clamping blocks (13) and a driving mechanism arranged between the two clamping blocks (13) for driving the two clamping blocks (13) to move closer to or away from each other, the two ends of the driving mechanism are respectively hinged to the corresponding clamping blocks (13), the clamping blocks (13) are all slidably connected to the slide rail (20), one of the clamping blocks (13) is connected to the feeding mechanism (6), and the top of each clamping block (13) is provided with a semicircular clamping hole (15) for clamping the workpiece to be processed, and the axis of the clamping hole (15) is vertical.

2. A slotting machine for a conductive plate of a power electronic module according to claim 1, characterized in that: The feeding mechanism (6) comprises a lead screw (21) arranged beside the slide rail (20) and a feeding motor (22) fixedly arranged on the frame (1), wherein the feeding motor (22) is connected to the lead screw (21) in a transmission manner, the lead screw (21) is connected to the frame (1) in a rotational manner, and the lead screw (21) is parallel to the slide rail (20), and a nut (25) is fixedly connected to the lower side of one of the clamping blocks (13), and the nut (25) is threadedly connected to the lead screw (21).

3. A slotting machine for a conductive plate of a power electronic module according to claim 1, characterized in that: The cutting mechanism (5) includes a drive shaft (17) rotatably connected to the frame (1), a cutter disc (16) fixedly connected to one end of the drive shaft (17), and a drive motor (28) fixedly connected to the frame (1). The drive motor (28) is transmission-connected to the drive shaft (17). The axis of the cutter disc (16) is perpendicular to the slide rail (20), and the symmetrical planes of the two end faces of the cutter disc (16) pass through the center of the mounting hole (15).

4. A slotting machine for a conductive plate of a power electronic module according to claim 1, characterized in that: The bottom of the clamping hole (15) is penetrated by an ejection hole (23), and the bottom surface of one clamping block (13) is fixedly connected to a vertical discharge cylinder (24) at the position of the ejection hole (23), and the push rod of the discharge cylinder (24) is coaxial with the ejection hole (23), and the diameter of the push rod of the discharge cylinder (24) is smaller than the diameter of the ejection hole (23).

5. The slotting machine for the conductive plate of a power electronic module according to claim 3, characterized in that: The top of each clamping block (13) is provided with a cutter groove (27) for allowing the upper portion of the clamping block (13) to pass longitudinally through the cutter disc (16).

6. The slotting machine for the conductive plate of a power electronic module according to claim 1, characterized in that: The frame (1) is fixedly provided with a funnel (8) and a cutting fluid tank (10) in order from top to bottom below the cutting mechanism (5); the cutting fluid tank (10) is filled with cutting fluid; a cutting fluid pump (7) is provided on the cutting fluid tank (10); when the cutting mechanism (5) cuts a workpiece, the cutting fluid pump (7) extracts the cutting fluid from the cutting fluid tank (10) and sprays the cutting fluid onto the processing part of the workpiece through a pipeline.

7. A slotting machine for a conductive plate of a power electronic module according to claim 6, characterized in that: A reflux port is provided on the top of the cutting fluid box (10), and a filter screen (9) is covered on the top of the cutting fluid box (10) at the reflux port.

8. The slotting machine for the conductive plate of a power electronic module according to claim 1, characterized in that: The driving mechanism is one of a longitudinally arranged clamping cylinder (11), an electric push rod, and a hydraulic cylinder.

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