A chamfering apparatus for die steel
By employing electromagnetic attraction and buffer design in the support mechanism, the stability problem of chamfering the inner opening of deep holes was solved, achieving a high-precision and low-friction chamfering effect and protecting the hole wall of the mold steel and the cutting tool.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG LINGLI INTELLIGENT MANUFACTURING TECHNOLOGY CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-31
AI Technical Summary
In the prior art, when chamfering the opening of a deep hole, the chamfering tool holder is prone to radial oscillation due to being suspended in the air, resulting in low machining accuracy and even damage to the tool or hole wall, making it impossible to effectively handle burrs and edges inside the deep hole.
A support mechanism is adopted, including a stabilizing cylinder, an electromagnetic block, and a guide block. Through the cooperation of electromagnetic attraction and buffer springs, multi-point stable support is formed to ensure the stability of the chamfering tool holder in the deep hole, reduce radial sway, and reduce friction by using ball bearings to contact the hole wall.
It significantly improves the machining accuracy and surface finish of the chamfer inside the deep hole, avoids tool damage and hole wall scratches, and reduces the difficulty and error risk of manual adjustment.
Smart Images
Figure CN224574794U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold steel processing technology, and more specifically, to a chamfering device for mold steel. Background Technology
[0002] In the field of mold processing, chamfering the openings of mold holes is a critical process. After molding, the edges of various mounting holes and positioning holes in molds often have burrs and sharp edges. If chamfering is not performed, it will not only affect the accuracy of mold assembly (such as causing parts to jam or uneven fit clearance), but may also cause cracks at the opening edges due to stress concentration during use, reducing the overall strength and service life of the mold. Therefore, chamfering to make the opening edges into smooth bevels or arc surfaces is a necessary step to ensure mold quality and performance.
[0003] In actual machining, many openings requiring chamfering are not located on the mold surface, but inside deep holes. For example, when a small hole is drilled inside a large hole, the opening of the small hole is located on the wall of the large hole, that is, inside the deep hole. These openings located inside deep holes also need to be chamfered to eliminate burrs and sharp edges. Currently, long-handled chamfering tools are commonly used for chamfering these openings inside deep holes.
[0004] The chamfering tool is fixed to the end of a long rod. The long rod is driven by the machine tool to penetrate into the hole to the hole opening for cutting. However, due to the depth characteristics of deep holes, the chamfering tool bar needs to be long enough to pass through the channel of a large or deep hole and reach the hole opening located inside. This makes the part of the tool bar away from the clamping end of the machine base suspended in the air. During the cutting process, uneven cutting force and friction deviation between the hole wall and the tool bar can easily cause radial swing at the lower end of the tool bar, resulting in problems such as skewed chamfering angle, inconsistent dimensions, and reduced edge smoothness of the hole opening. This seriously affects the machining accuracy of deep hole chamfering and may even cause the tool bar to collide with the hole wall due to excessive swing, causing tool damage or scratches on the hole wall of the mold. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a chamfering device for mold steel.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A chamfering device for mold steel includes a worktable with a support platform connected to its upper end. A mold workpiece body is connected above the support platform. A support rod with an inverted L-shaped structure is connected to one side of the upper end of the worktable. A slide rail is connected to one end of the support rod, and a slider is slidably connected to one side of the slide rail. A drive motor is connected to one side of the slider, and a drive rod is connected to the output end of the drive motor. A chamfering tool is connected to the lower end of the drive rod via a mounting ring. A threaded groove is formed in the middle of the lower end of the chamfering tool, and an installation mechanism is inserted into the threaded groove. A support mechanism is connected below the installation mechanism. The support mechanism includes a stabilizing cylinder. A battery body is connected to the middle of the upper end of the inner wall of the stabilizing cylinder, and a connecting rod is connected to the middle of the lower end of the battery body. The lower end of the connecting rod is connected to the lower end of the inner wall of the stabilizing cylinder.
[0008] Preferably, the mounting mechanism includes a mounting rod, the upper end of which is inserted into the threaded groove and threadedly connected to the inside of the threaded groove.
[0009] Preferably, a first electromagnetic block is sleeved on the upper part of the outer wall of the connecting rod, and the upper end of the first electromagnetic block contacts the lower end of the battery body. A second electromagnetic block is sleeved on the upper part of the outer wall of the connecting rod, and a collar is connected to the lower end of the second electromagnetic block. The collar is sleeved on the lower part of the outer wall of the connecting rod, and a buffer plate is connected to the lower end of the collar. Each buffer plate is circumferentially connected to a buffer spring, and the lower ends of the plurality of buffer springs are all connected to the lower end of the inner wall of the stabilizing cylinder.
[0010] Preferably, a first guide block is circumferentially connected to the upper part of the outer wall of the collar, and there are four sets of the first guide blocks. One side of the plurality of first guide blocks is inclined, and a second guide block is connected to one side of the plurality of first guide blocks. One side of the second guide block is inclined and the shape of one side of the second guide block is adapted to the shape of one side of the first guide block. A sliding plate is connected to one side of the plurality of second guide blocks, and a connecting ring is connected to the middle of the outer wall of the first electromagnetic block.
[0011] Preferably, the upper end of the connecting ring is provided with a moving groove, and a moving block is slidably connected to the inner wall of the multiple moving grooves. The moving block is shaped like an inverted convex structure, and the lower end of the multiple moving blocks is respectively connected to the middle of the upper end of multiple sliding plates.
[0012] Preferably, each of the multiple slide plates has a slide rod connected to its upper and lower parts, one end of each slide rod extends through to one side of the stabilizing cylinder, and one end of each slide rod is connected to a pressure plate.
[0013] Preferably, there are four sets of pressure plates, with multiple pressure plates located on the outer wall of the stabilizing cylinder. Each of the multiple pressure plates has a rolling groove on one side, and the inner wall of the multiple rolling grooves is embedded with balls.
[0014] The technical effects and advantages of this utility model are as follows:
[0015] 1. By driving the first and second electromagnetic blocks, and combining the first and second guide blocks with inclined surfaces, the radial extension of the pressure plate with balls is precisely controlled, so that it fits tightly and evenly against the inner wall of the deep hole, forming a multi-point stable support. This effectively suppresses the radial sway of the slender chamfering tool holder during machining in the deep hole, significantly improves the machining accuracy of the chamfering of the hole opening and the surface finish of the hole opening, and avoids tool damage or hole wall scratches caused by tool holder wobbling.
[0016] 2. The expansion and contraction of the support mechanism is entirely controlled by electromagnetic switching, which greatly reduces the difficulty and error risk of manual adjustment in narrow and deep holes. At the same time, the ball contact greatly reduces friction, and the buffer spring absorbs vibration, together ensuring a smooth and stable support process and effectively protecting the hole wall of the precision mold steel workpiece from scratches. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the novel device;
[0018] Figure 2 This is a schematic diagram of the installation structure of the stabilizer cylinder;
[0019] Figure 3 This is a schematic diagram of the installation structure of the buffer plate;
[0020] Figure 4 This is a schematic diagram of the contact structure between the second guide block and the first guide block;
[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the pressure plate.
[0022] The attached figures are labeled as follows: 1. Workbench; 2. Placement platform; 3. Support rod; 4. Slide rail; 5. Slider; 6. Drive motor; 7. Drive rod; 8. Mounting ring; 9. Chamfering tool holder; 10. Threaded groove; 11. Mounting rod; 12. Pressure plate; 13. Stabilizing cylinder; 14. Battery body; 15. Connecting rod; 16. First electromagnetic block; 17. Second electromagnetic block; 18. Collar; 19. Buffer plate; 20. Buffer spring; 21. First guide block; 22. Connecting ring; 23. Slide plate; 24. Second guide block; 25. Slide rod. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Refer to the instruction manual appendix Figures 1-5 As shown in the figure, a chamfering device for mold steel according to an embodiment of the present invention includes a workbench 1, a support platform 2 connected to the upper end of the workbench 1, a mold workpiece body connected above the support platform 2, a support rod 3 connected to one side of the upper end of the workbench 1, the support rod 3 is configured with an inverted L-shaped structure, a slide rail 4 connected to one end of the support rod 3, a slider 5 slidably connected to one side of the slide rail 4, a drive motor 6 connected to one side of the slider 5, a drive rod 7 connected to the output end of the drive motor 6, a chamfering tool 9 connected to the lower end of the drive rod 7 through a mounting ring 8, a threaded groove 10 opened in the middle of the lower end of the chamfering tool 9, an installation mechanism inserted into the threaded groove 10, and a support mechanism connected below the installation mechanism;
[0025] The surface of the support platform 2 is covered with a layer of wear-resistant rubber pad to prevent wear on the mold workpiece body when it is placed. The slide rail 4 and the slider 5 can adjust the height position of the drive motor 6 and the chamfering tool bar 9. The mounting mechanism and the threaded groove 10 facilitate the installation and removal of the support mechanism.
[0026] The mounting mechanism includes a mounting rod 11. The upper end of the mounting rod 11 is inserted into the threaded groove 10 and threadedly connected to the inside of the threaded groove 10. The threaded connection between the mounting rod 11 and the threaded groove 10 is a self-locking fine thread structure. Automatic locking after adjustment is achieved through the friction between the thread surfaces, which facilitates the control of the distance between the chamfering tool bar 9 and the stabilizing cylinder 13. After adjustment, no additional fasteners are needed to maintain the fixed position.
[0027] The mounting rod 11 is threadedly connected to the threaded groove 10, allowing the position of the mounting rod 11 to be adjusted arbitrarily, and can be used to chamfer holes of different depths.
[0028] The support mechanism includes a stabilizing cylinder 13. A battery body 14 is connected to the upper middle part of the inner wall of the stabilizing cylinder 13. A connecting rod 15 is connected to the lower middle part of the battery body 14. The lower end of the connecting rod 15 is connected to the lower end of the inner wall of the stabilizing cylinder 13. A first electromagnetic block 16 is sleeved on the upper part of the outer wall of the connecting rod 15. The upper end of the first electromagnetic block 16 contacts the lower end of the battery body 14. A second electromagnetic block 17 is sleeved on the upper part of the outer wall of the connecting rod 15. A collar 18 is connected to the lower end of the second electromagnetic block 17. The collar 18 is sleeved on the lower part of the outer wall of the connecting rod 15. A buffer plate 19 is connected to the lower end of the buffer plate 19. Buffer springs 20 are circumferentially connected to the lower end of each buffer plate 19. The lower ends of multiple buffer springs 20 are all connected to the lower end of the inner wall of the stabilizing cylinder 13. A first guide block 21 is circumferentially connected to the upper part of the outer wall of the collar 18. There are four sets of first guide blocks 21. Multiple first guide blocks 21 are arranged at an angle on one side. A second guide block 24 is connected to one side. The shape of one side of the second guide block 24 is inclined and matches the shape of one side of the first guide block 21. A sliding plate 23 is connected to one side of multiple second guide blocks 24. A connecting ring 22 is connected to the middle of the outer wall of the first electromagnetic block 16. A moving groove is circumferentially opened at the upper end of the connecting ring 22. Moving blocks are slidably connected to the inner wall of multiple moving grooves. The moving blocks are inverted convex structure. The lower ends of multiple moving blocks are respectively connected to the middle of the upper end of multiple sliding plates 23. A sliding rod 25 is connected to the upper and lower parts of one side of multiple sliding plates 23. One end of multiple sliding rods 25 extends through to one side of the stabilizing cylinder 13. One end of multiple sliding rods 25 is connected to a pressure plate 12. There are four sets of pressure plates 12. Multiple pressure plates 12 are located on the outer wall of the stabilizing cylinder 13. A rolling groove is opened on one side of multiple pressure plates 12. Ball bearings are embedded in the inner wall of multiple rolling grooves.
[0029] The stabilizing cylinder 13 is made of lightweight alloy material, which reduces the overall weight while ensuring structural strength. The battery body 14 is a rechargeable lithium battery, which has the characteristics of small size, large capacity and stable discharge, and provides power for the electrical components of the support mechanism. The first electromagnetic block 16 is made of high magnetic permeability material. The upper end of the first electromagnetic block 16 is in close contact with the lower end of the battery body 14 to ensure the stability of power transmission. The second electromagnetic block 17 is made of the same material as the first electromagnetic block 16. After being energized, it can generate a strong electromagnetic attraction. The collar 18 is sleeved on the lower part of the outer wall of the connecting rod 15 and can slide along the axial direction of the connecting rod 15 to prevent displacement when the second electromagnetic block 17 moves up and down.
[0030] The second guide block 24 is connected to stabilizing blocks on both sides. The first guide block 21 has stabilizing grooves on both sides corresponding to the two stabilizing blocks. The two stabilizing blocks slide inside the stabilizing grooves to ensure the stability of the first guide block 21 when it moves up and down. The first guide block 21 forms a wedge-shaped structure. One side of the first guide block 21 is movably connected to the second guide block 24 to achieve smooth force transmission. The inverted convex moving block can prevent it from falling out of the moving groove. The lower ends of multiple moving blocks are fixedly connected to the middle of the upper ends of multiple sliding plates 23 by bolts. The sliding rod 25 and the stabilizing cylinder 13 are fitted with a clearance and can slide freely. The four pressure plates 12 are evenly distributed in the circumference. The pressure plates 12 are arc-shaped and can be adapted to the hole wall to facilitate the contact between one side of the pressure plate 12 and the hole wall.
[0031] Working principle: When in use, the mold workpiece is placed on the support platform 2. Through the sliding cooperation of the slide rail 4 and the slider 5, the horizontal position of the drive motor 6 and the chamfering tool 9 connected below is adjusted so that the chamfering tool 9 is aligned with the entrance of the deep hole on the body of the mold workpiece. Then, the drive slider 5 moves downward along the slide rail 4, driving the chamfering tool 9 and the support mechanism connected below to penetrate into the deep hole together until the lower end of the chamfering tool 9 is close to the opening of the deep hole that needs to be chamfered.
[0032] When the support mechanism reaches the preset support position in the deep hole, the battery body 14 supplies power to the first electromagnetic block 16 and the second electromagnetic block 17, causing them to generate a magnetic force that attracts each other. Under the action of the magnetic force, the second electromagnetic block 17 moves upward, causing the collar 18 to move upward synchronously. At this time, the buffer plate 19 at the lower end of the collar 18 stretches the buffer spring 20. After the buffer spring 20 is stretched, it generates a downward elastic force, which prevents the second electromagnetic block 17 from continuing to move upward and avoids it from rigidly colliding with the first electromagnetic block 16.
[0033] As the collar 18 moves upward, the first guide block 21 on its outer wall also moves upward. Since one side of the first guide block 21 and one side of the second guide block 24 are both inclined and mutually adapted, the first guide block 21 will push the second guide block 24 to move away from the connecting rod 15, thereby driving the slide plate 23 to move synchronously. The moving block at the upper end of the slide plate 23 slides in the moving groove of the connecting ring 22, providing guidance and support for the movement of the slide plate 23 and ensuring its smooth movement.
[0034] When the slide plate 23 moves, it will drive the slide rod 25 to extend outward of the stabilizing cylinder 13, so that the pressure plate 12 gradually approaches the hole wall of the deep hole until the ball on one side of the pressure plate 12 is in close contact with the hole wall, forming a stable four-point support. At this time, even if the first electromagnetic block 16 and the second electromagnetic block 17 have not yet fully contacted, the pressure plate 12 has obtained sufficient support force through the transmission of the slide rod 25 and the slide plate 23, effectively limiting the radial swing of the chamfering tool bar 9 in the deep hole.
[0035] After the support is completed, the drive motor 6 is started. The drive motor 6 drives the chamfering cutter 9 to rotate through the drive rod 7, and performs chamfering cutting on the opening inside the deep hole. During the cutting process, the ball bearings on one side of the pressure plate 12 roll into contact with the hole wall, which can maintain the stability of the support and reduce the friction between the pressure plate 12 and the hole wall, thus avoiding scratches on the hole wall.
[0036] After the chamfering operation is completed, the power supply to the first electromagnetic block 16 and the second electromagnetic block 17 is disconnected. The magnetic force disappears, and the buffer spring 20, under its own elastic force, pulls the buffer plate 19 and the collar 18 downwards to reset. The second electromagnetic block 17 then moves downwards, and the pushing force of the first guide block 21 on the second guide block 24 disappears. The sliding plate 23, under its own weight and the influence of related components, moves towards the connecting rod 15. The sliding rod 25 drives the pressure plate 12 back to the vicinity of the stabilizing cylinder 13, releasing the support for the deep hole wall.
[0037] Finally, the drive slider 5 moves upward along the slide rail 4, removing the chamfering tool 9 and the support mechanism from the deep hole, thus completing the chamfering process of the entire deep hole opening. If chamfering is required for deep holes of different specifications, rotate the mounting rod 11, and its upper end rotates relative to the fine thread of the thread groove 10. After adjusting to the required spacing, stop rotating. Utilizing the self-locking characteristic of the fine thread, the mounting rod 11 and the thread groove 10 can be automatically locked together, preventing spacing deviation due to vibration during the chamfering process. This ensures the relative position of the support mechanism and the chamfering tool 9 remains stable to meet different processing requirements.
[0038] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0039] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0040] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A chamfering apparatus for die steel comprising a worktable (1), characterized in that: The upper end of the workbench (1) is connected to a support platform (2), and the mold workpiece body is connected above the support platform (2). A support rod (3) is connected to one side of the upper end of the workbench (1). The support rod (3) is set in an inverted L-shape. One end of the support rod (3) is connected to a slide rail (4). A slider (5) is slidably connected to one side of the slide rail (4). A drive motor (6) is connected to one side of the slider (5). The output end of the drive motor (6) is connected to a drive rod (7). The lower end of the drive rod (7) is connected to... The mounting ring (8) is connected to a chamfering tool bar (9). A threaded groove (10) is provided in the middle of the lower end of the chamfering tool bar (9). An installation mechanism is inserted into the threaded groove (10). A support mechanism is connected below the installation mechanism. The support mechanism includes a stabilizing cylinder (13). A battery body (14) is connected to the middle of the upper end of the inner wall of the stabilizing cylinder (13). A connecting rod (15) is connected to the middle of the lower end of the battery body (14). The lower end of the connecting rod (15) is connected to the lower end of the inner wall of the stabilizing cylinder (13).
2. A chamfering apparatus for die steel as claimed in claim 1, wherein: The installation mechanism includes an installation rod (11), the upper end of which is inserted into the threaded groove (10) and threadedly connected to the inside of the threaded groove (10).
3. A chamfering apparatus for die steel as claimed in claim 1, wherein: A first electromagnetic block (16) is sleeved on the upper part of the outer wall of the connecting rod (15). The upper end of the first electromagnetic block (16) is in contact with the lower end of the battery body (14). A second electromagnetic block (17) is sleeved on the upper part of the outer wall of the connecting rod (15). A collar (18) is connected to the lower end of the second electromagnetic block (17). The collar (18) is sleeved on the lower part of the outer wall of the connecting rod (15). A buffer plate (19) is connected to the lower end of the collar (18). A buffer spring (20) is circumferentially connected to the lower end of each buffer plate (19). The lower ends of multiple buffer springs (20) are connected to the lower end of the inner wall of the stabilizing cylinder (13).
4. A chamfering apparatus for die steel as claimed in claim 3 wherein: The upper circumferential part of the outer wall of the collar (18) is connected to a first guide block (21). There are four sets of the first guide blocks (21). One side of the first guide blocks (21) is inclined. One side of the first guide blocks (21) is connected to a second guide block (24). One side of the second guide block (24) is inclined. The shape of one side of the second guide block (24) matches the shape of one side of the first guide block (21). One side of the second guide block (24) is connected to a sliding plate (23). The middle part of the outer wall of the first electromagnetic block (16) is connected to a connecting ring (22).
5. A chamfering apparatus for die steel as claimed in claim 4 wherein: The upper end of the connecting ring (22) is provided with a moving groove, and a moving block is slidably connected to the inner wall of the multiple moving grooves. The moving block is shaped like an inverted convex structure, and the lower end of the multiple moving blocks is respectively connected to the middle of the upper end of the multiple sliding plates (23).
6. A chamfering apparatus for die steel as defined in claim 4 wherein: Each of the multiple slide plates (23) has a slide rod (25) connected to the upper and lower parts of one side. One end of each slide rod (25) extends through to one side of the stabilizing cylinder (13), and one end of each slide rod (25) is connected to a pressure plate (12).
7. A chamfering apparatus for die steel as claimed in claim 6 wherein: The number of pressure plates (12) is four sets. Multiple pressure plates (12) are located on the outer wall of the stabilizing cylinder (13). Rolling grooves are opened on one side of multiple pressure plates (12), and rolling balls are embedded in the inner wall of multiple rolling grooves.