A slotting device for producing a die-casting mold

Abstract

A kind of production slotting device for die-casting mould, it is related to die-casting mould device field, including milling machine base, three-axis translation operation platform, feed assembly and main shaft motor, milling machine base is connected with feed assembly, feed assembly is connected with main shaft motor, three-axis translation operation platform is connected with milling machine base, main shaft motor is equipped with adaptive mould slotting component, adaptive mould slotting component includes protective shell, shaft, connecting pipe, tool holder, milling cutter, rotating ring, adaptive cutting force component, quick reset component and buffer component, protective shell is fixedly connected with main shaft motor, shaft is fixedly connected with main shaft motor, rotating ring is connected with shaft by adaptive cutting force component, rotating ring is connected with tool holder by connecting pipe, tool holder is connected with milling cutter, quick reset component is connected with protective shell, buffer component is connected with rotating ring, beneficial effect: avoid because of hard point impact and cause milling cutter position deviation, cause workpiece groove depth is not one.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold equipment technology, and in particular to a grooving device for producing die casting molds. Background Technology

[0002] As is well known, milling is a crucial finishing process in the production of die-casting molds, and its quality directly affects the lifespan of the mold, the forming quality of the die-cast parts, and production efficiency.

[0003] Chinese Patent Publication No. CN213672860U describes a grooving device for die-casting mold production, comprising a work frame, a primary motor, a threaded rod, and a sliding seat. The sliding seat is fixedly connected to a primary electric push rod, which is equipped with a grooving mechanism. However, in actual use, the following problems still exist: Due to the inevitable compositional segregation, impurity incorporation, and uneven carbide distribution during the smelting, forging, or heat treatment of mold steel, uneven mold hardness and the formation of hard spots in local areas occur. When using a traditional milling machine for grooving, the cutting force changes abruptly when encountering these hard spots. The huge impact causes the machined grooves to have inconsistent depths and dimensional deviations. At the same time, after the milling cutter passes over the hard spot, the area behind the hard spot causes an excessive instantaneous depth of cut, resulting in overcutting. Ultimately, this leads to a decrease in the dimensional accuracy of the mold grooving, thus reducing the precision of the mold grooving.

[0004] Therefore, a grooving device for producing die-casting molds is proposed. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a grooving device for producing die-casting molds.

[0006] To achieve the aforementioned objective, this utility model adopts the following technical solution: A grooving device for producing die-casting molds includes a milling machine base, a three-axis translational operating table, a feed assembly, and a spindle motor. The upper surface of the milling machine base is connected to the bottom end of the feed assembly, and the feed end of the feed assembly is connected to the spindle motor. The three-axis translational operating table is located below the spindle motor and connected to the upper surface of the milling machine base. The spindle motor is equipped with an adaptive mold grooving component, which includes a protective shell, a rotating shaft, a connecting pipe, a cutter head clamp, a milling cutter, a rotating ring, an adaptive cutting force assembly, a quick reset assembly, and a buffer assembly. The top end of the protective shell is fixedly connected to the outer shell of the spindle motor. The top end of the rotating shaft is located inside the protective shell and is fixedly connected to the output end of the main spindle motor. The fixed end of the adaptive shearing force assembly is connected to the bottom end of the rotating shaft. The movable end of the adaptive shearing force assembly is connected to the inner wall of the rotating ring. The lower surface of the rotating ring is connected to the cutter head clamp through the connecting pipe. The cutter head clamp is connected to the milling cutter. The fixed end of the quick reset assembly is connected to the inner wall of the protective shell. The movable end of the quick reset assembly is connected to the upper surface of the rotating ring. The fixed end of the buffer assembly is connected to the upper surface of the rotating ring. The movable end of the buffer assembly is connected to the rotating shaft.

[0007] The adaptive shear force assembly includes a first connecting key and a first limiting ring. A plurality of first connecting keys are provided and are evenly distributed circumferentially along the axis of the rotating shaft. The first connecting keys are inclinedly disposed on the outer wall of the rotating shaft. A first sliding groove is provided on the inner wall of the rotating ring. One end of the first connecting key is fixedly connected to the rotating shaft, and the other end of the first connecting key is slidably connected to the rotating ring within the first sliding groove. The inner wall of the first limiting ring is fixedly connected to the outer wall of the rotating shaft, and the upper surface of the first limiting ring is connected to the bottom end of the first connecting key.

[0008] The quick reset assembly includes a fixed ring, a reset component, and a vibration damping component. The outer wall of the fixed ring is located above the rotating ring and is fixedly connected to the inner wall of the protective shell. The top end of the reset component is connected to the lower surface of the fixed ring, and the bottom end of the reset component is connected to the upper surface of the rotating ring.

[0009] The reset component includes a wedge-shaped pressing block and a reset protrusion. A plurality of wedge-shaped pressing blocks are provided and are evenly distributed circumferentially along the axis of the fixed ring. The top end of the wedge-shaped pressing block is fixedly connected to the fixed ring, the bottom end of the wedge-shaped pressing block is in contact with the top end of the reset protrusion, and the bottom end of the reset protrusion is fixedly connected to the upper surface of the rotating ring.

[0010] The vibration damping components are provided in multiple quantities and are evenly distributed circumferentially along the axis of the fixed ring. Each vibration damping component includes a damping rod, a damping ring, and a limiting block. The damping rings are provided in multiple quantities. The bottom end of the damping rod is fixedly connected to the upper surface of the fixed ring. The inner wall of the damping ring is slidably connected to the damping rod. The damping rings are distributed along the axis of the damping rod, and the damping ring located at the bottom is in contact with the fixed ring. The top end of the damping rod is connected to the limiting block.

[0011] The buffer assembly includes a buffer ring, a second connecting key, a second limiting ring, and a buffer spring. The inner wall of the buffer ring is provided with a second sliding groove. The number, position, and tilt angle of the second connecting key correspond to the number, position, and tilt angle of the first connecting key. One end of the second connecting key is located above the first connecting key and is fixedly connected to the rotating shaft. The other end of the second connecting key is located in the second sliding groove and is slidably connected to the buffer ring. The inner wall of the second limiting ring is fixedly connected to the rotating shaft. The upper surface of the second limiting ring is connected to the bottom end of the second connecting key. The lower surface of the buffer ring is connected to the upper surface of the rotating ring through the buffer spring sleeved on the rotating shaft.

[0012] The angle between the first connecting key and the axis of the rotating shaft is 5° to 10°.

[0013] Compared with the prior art, this utility model has the following beneficial effects: When the milling cutter encounters a hard point, the cutting resistance increases sharply, pushing the rotating ring to slide upward along the inclined first connecting key. Subsequently, the wedge-shaped lower pressure block impacts the inclined surface of the reset protrusion, enabling the rotating ring to drive the milling cutter to achieve instantaneous reset. This avoids milling cutter position displacement caused by hard point impact, resulting in uneven workpiece groove depth and improving the grooving accuracy of the machined mold. Through the energy dissipation mechanism of the damping ring, buffer spring, and buffer ring, the vibration generated by the impact and reset is absorbed, preventing the vibration from being transmitted to the milling cutter and causing chattering of the milling cutter, resulting in chatter marks on the workpiece groove wall. This improves the running stability of the milling cutter and the grooving accuracy during continuous milling. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural schematic diagram of the adaptive mold grooving component of this utility model; Figure 3 This is a schematic diagram of the internal structure of the protective shell of the adaptive mold slotting component of this utility model; Figure 4 This is a cross-sectional view of the side of the adaptive mold slotting component of this utility model. Figure 5 This is a schematic diagram of the structure inside the protective shell of the adaptive mold grooving component in the upward sliding state of the rotating ring of this utility model; Figure 6 This is a three-dimensional structural diagram of the rotating shaft of this utility model; Figure 7 This is a three-dimensional structural diagram of the rotating ring of this utility model; Figure 8 This is a three-dimensional structural diagram of the fixing ring of this utility model; Figure 9 This utility model Figure 4 A schematic diagram of the three-dimensional structure at point A is shown; Figure 10 This utility model Figure 5 A schematic diagram of the three-dimensional structure at point B is shown.

[0015] 1. Milling machine base; 2. Three-axis translational operating table; 3. Feed assembly; 4. Spindle motor; 5. Protective housing; 6. Rotary shaft; 7. Connecting pipe; 8. Tool holder; 9. Milling cutter; 10. Rotating ring; 11. First connecting key; 12. First limiting ring; 13. First sliding groove; 14. Fixed ring; 15. Wedge-shaped pressing block; 16. Reset protrusion; 17. Vibration damping rod; 18. Vibration damping ring; 19. Limiting block; 20. Buffer ring; 21. Second connecting key; 22. Second limiting ring; 23. Buffer spring; 24. Second sliding groove; 25. Adaptive mold grooving component. Detailed Implementation

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0017] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0018] like Figure 1-5As shown, a grooving device for producing die-casting molds includes a milling machine base 1, a three-axis translational operating table 2, a feed assembly 3, and a spindle motor 4. The upper surface of the milling machine base 1 is connected to the bottom end of the feed assembly 3, and the feed end of the feed assembly 3 is connected to the spindle motor 4. The three-axis translational operating table 2 is located below the spindle motor 4 and connected to the upper surface of the milling machine base 1. The spindle motor 4 is equipped with an adaptive mold grooving component 25, which includes a protective shell 5, a rotating shaft 6, a connecting pipe 7, a cutter head clamp 8, a milling cutter 9, a rotating ring 10, an adaptive cutting force assembly, a quick reset assembly, and a buffer assembly. The top of the protective shell 5 is connected to... The outer casing of the main spindle motor 4 is fixedly connected. The top end of the rotating shaft 6 is located inside the protective shell 5 and is fixedly connected to the output end of the main spindle motor 4. The fixed end of the adaptive cutting force component is connected to the bottom end of the rotating shaft 6. The movable end of the adaptive cutting force component is connected to the inner wall of the rotating ring 10. The lower surface of the rotating ring 10 is connected to the cutter head clamp 8 through the connecting pipe 7. The cutter head clamp 8 is connected to the milling cutter 9. The fixed end of the quick reset component is connected to the inner wall of the protective shell 5. The movable end of the quick reset component is connected to the upper surface of the rotating ring 10. The fixed end of the buffer component is connected to the upper surface of the rotating ring 10. The movable end of the buffer component is connected to the rotating shaft 6.

[0019] like Figure 2-7 As shown, the adaptive shear force assembly includes a first connecting key 11 and a first limiting ring 12. Several first connecting keys 11 are provided, and the first connecting keys 11 are evenly distributed circumferentially along the axis of the rotating shaft 6. The first connecting keys 11 are inclinedly disposed on the outer wall of the rotating shaft 6. A first sliding groove 13 is provided on the inner wall of the rotating ring 10. One end of the first connecting key 11 is fixedly connected to the rotating shaft 6, and the other end of the first connecting key 11 is located in the first sliding groove 13 and slidably connected to the rotating ring 10. The inner wall of the first limiting ring 12 is fixedly connected to the outer wall of the rotating shaft 6, and the upper surface of the first limiting ring 12 is connected to the bottom end of the first connecting key 11.

[0020] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 9 and Figure 10 As shown, the quick reset assembly includes a fixed ring 14, a reset component, and a vibration damping component. The outer wall of the fixed ring 14 is located above the rotating ring 10 and is fixedly connected to the inner wall of the protective shell 5. The top end of the reset component is connected to the lower surface of the fixed ring 14, and the bottom end of the reset component is connected to the upper surface of the rotating ring 10.

[0021] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 9 and Figure 10As shown, the reset component includes a wedge-shaped pressing block 15 and a reset protrusion 16. Several wedge-shaped pressing blocks 15 are provided and are evenly distributed circumferentially along the axis of the fixing ring 14. The top end of the wedge-shaped pressing block 15 is fixedly connected to the fixing ring 14, and the bottom end of the wedge-shaped pressing block 15 is in contact with the top end of the reset protrusion 16. The bottom end of the reset protrusion 16 is fixedly connected to the upper surface of the rotating ring 10.

[0022] like Figure 4 , Figure 5 , Figure 8 , Figure 9 and Figure 10 As shown, there are several vibration damping components, which are evenly distributed circumferentially along the axis of the fixed ring 14. The vibration damping components include vibration damping rods 17, vibration damping rings 18, and limiting blocks 19. There are several vibration damping rings 18. The bottom end of the vibration damping rod 17 is fixedly connected to the upper surface of the fixed ring 14. The inner wall of the vibration damping ring 18 is slidably connected to the vibration damping rod 17. The vibration damping rings 18 are distributed along the axis of the vibration damping rod 17, and the lowest vibration damping ring 18 is in contact with the fixed ring 14. The top end of the vibration damping rod 17 is connected to the limiting block 19.

[0023] like Figure 3-6 As shown, the buffer assembly includes a buffer ring 20, a second connecting key 21, a second limiting ring 22, and a buffer spring 23. The inner wall of the buffer ring 20 is provided with a second sliding groove 24. The number, position, and tilt angle of the second connecting key 21 correspond to the number, position, and tilt angle of the first connecting key 11. One end of the second connecting key 21 is located above the first connecting key 11 and is fixedly connected to the rotating shaft 6. The other end of the second connecting key 21 is located in the second sliding groove 24 and is slidably connected to the buffer ring 20. The inner wall of the second limiting ring 22 is fixedly connected to the rotating shaft 6. The upper surface of the second limiting ring 22 is connected to the bottom end of the second connecting key 21. The lower surface of the buffer ring 20 is connected to the upper surface of the rotating ring 10 through the buffer spring 23 sleeved on the rotating shaft 6.

[0024] like Figure 6 As shown, the angle between the first connecting key 11 and the axis of the rotating shaft 6 is 5° to 10°.

[0025] The work process is as follows: S1. In use, the mold to be slotted is fixed on the three-axis translational operating table 2. The spindle motor 4 is started to drive the rotating shaft 6 to rotate at high speed. The rotating shaft 6 transmits torque and downward axial force to the rotating ring 10 through the cooperation of the first connecting key 11 and the first sliding groove 13 set on the rotating shaft 6. The rotating ring 10 drives the milling cutter 9 to rotate through the connecting pipe 7 and the cutter head clamp 8. The upper buffer ring 20 rotates with the rotating shaft 6 through the cooperation of the second connecting key 21 and the second sliding groove 24. The buffer spring 23 is in a pre-compressed stable state. The mold is slotted by pressing down the adaptive mold slotting component 25 through the feed component 3.

[0026] S2, when the milling cutter 9 encounters a hard spot in the material, the hard spot causes a sudden increase in cutting resistance and generates an upward reaction force on the milling cutter 9. This reaction force pushes the milling cutter 9, the cutter head holder 8, and the connecting pipe 7 upward as a whole. The rotating ring 10 slides upward along the inclined first connecting key 11. As the rotating ring 10 moves upward, the reset protrusion 16 on the rotating ring 10 also rises and collides with the inclined surface of the wedge-shaped lower pressure block 15 on the fixed ring 14. Since the rotating ring 10 is still rotating at high speed, after the collision, the inclined surface of the wedge-shaped lower pressure block 15 faces the reset protrusion. The starting point 16 generates a downward component force, which forces the rotating ring 10 to slide down along the first connecting key 11 instantaneously, quickly pressing the milling cutter 9 back and restoring effective milling. The milling cutter 9 encounters a hard point, and the cutting resistance increases sharply, pushing the rotating ring 10 to slide up along the inclined first connecting key 11. Subsequently, the wedge-shaped lower pressure block 15 and the inclined surface impact mechanism of the reset protrusion 16 cause the rotating ring 10 to drive the milling cutter 9 to achieve instantaneous reset, avoiding the milling cutter 9 position displacement caused by hard point impact, resulting in uneven workpiece groove depth, and improving the grooving accuracy of the machined mold.

[0027] S3, at the instant the wedge-shaped lower pressure block 15 collides with the reset protrusion 16, the impact force is transmitted through the fixed ring 14 to the damping rod 17 fixed to the fixed ring 14. Under the action of inertia, the damping ring 18 slides upward along the damping rod 17 and collides. The mass of the damping ring 18 itself and the friction of the collision consume most of the vibration energy generated by the impact, preventing the vibration energy from being transmitted to the protective shell 5 and the spindle motor 4, thereby ensuring the machining accuracy and protecting the main machine. At the same time, during the upward movement of the rotating ring 10, it compresses the buffer spring 23 below. The spring absorbs the vibration energy. After reset, the rebound force of the buffer spring 23 helps to suppress residual vibration and push the rotating ring. 10. Smooth reset: During the entire process of compression and release of the buffer spring 23, the force of the buffer spring 23 is transmitted to the upper buffer ring 20. The buffer ring 20 is connected to the rotating shaft 6 through the second connecting key 21. The motion response of the buffer ring 20 lags behind the change of spring force, absorbing the residual vibration generated after reset and maintaining the stability of the rotating ring 10. Through the energy dissipation mechanism of the damping ring 18, the buffer spring 23 and the buffer ring 20, the vibration generated by the impact and reset is absorbed, avoiding the vibration from being transmitted to the milling cutter 9, which would cause chatter in the milling cutter 9 and cause chatter marks on the workpiece groove wall. This improves the running stability and grooving accuracy of the milling cutter 9 during continuous milling.

[0028] To ensure torque and downward axial force while allowing the rotating ring 10 to slide upward when cutting resistance increases sharply, the angle between the first connecting key 11 and the axis of the rotating shaft 6 is preferably 5° to 10°.

[0029] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A grooving device for producing die-casting molds, comprising a milling machine base (1), a three-axis translational operating table (2), a feed assembly (3), and a spindle motor (4), wherein the upper surface of the milling machine base (1) is connected to the bottom end of the feed assembly (3), the feed end of the feed assembly (3) is connected to the spindle motor (4), and the three-axis translational operating table (2) is located below the spindle motor (4) and connected to the upper surface of the milling machine base (1), characterized in that: The spindle motor (4) is equipped with an adaptive mold grooving component (25), which includes a protective shell (5), a rotating shaft (6), a connecting pipe (7), a cutter head clamp (8), a milling cutter (9), a rotating ring (10), an adaptive cutting force assembly, a quick reset assembly, and a buffer assembly. The top of the protective shell (5) is fixedly connected to the outer shell of the spindle motor (4), and the top of the rotating shaft (6) is located inside the protective shell (5) and fixedly connected to the output end of the spindle motor (4). The fixed end of the adaptive cutting force assembly is connected to the bottom end of the rotating shaft (6). The adaptive shearing force assembly is connected to the inner wall of the rotating ring (10), the lower surface of the rotating ring (10) is connected to the cutter head clamp (8) through the connecting pipe (7), the cutter head clamp (8) is connected to the milling cutter (9), the fixed end of the quick reset assembly is connected to the inner wall of the protective shell (5), the movable end of the quick reset assembly is connected to the upper surface of the rotating ring (10), the fixed end of the buffer assembly is connected to the upper surface of the rotating ring (10), and the movable end of the buffer assembly is connected to the rotating shaft (6).

2. The grooving device for producing die-casting molds according to claim 1, characterized in that: The adaptive shear force assembly includes a first connecting key (11) and a first limiting ring (12). There are several first connecting keys (11), and the first connecting keys (11) are evenly distributed circumferentially along the axis of the rotating shaft (6). The first connecting keys (11) are inclinedly disposed on the outer wall of the rotating shaft (6). The inner wall of the rotating ring (10) is provided with a first sliding groove (13). One end of the first connecting key (11) is fixedly connected to the rotating shaft (6), and the other end of the first connecting key (11) is located in the first sliding groove (13) and slidably connected to the rotating ring (10). The inner wall of the first limiting ring (12) is fixedly connected to the outer wall of the rotating shaft (6), and the upper surface of the first limiting ring (12) is connected to the bottom end of the first connecting key (11).

3. The grooving device for producing die-casting molds according to claim 2, characterized in that: The quick reset assembly includes a fixed ring (14), a reset component, and a vibration damping component. The outer wall of the fixed ring (14) is located above the rotating ring (10) and is fixedly connected to the inner wall of the protective shell (5). The top end of the reset component is connected to the lower surface of the fixed ring (14), and the bottom end of the reset component is connected to the upper surface of the rotating ring (10).

4. The grooving device for producing die-casting molds according to claim 3, characterized in that: The reset component includes a wedge-shaped pressing block (15) and a reset protrusion (16). There are several wedge-shaped pressing blocks (15), and the wedge-shaped pressing blocks (15) are evenly distributed circumferentially along the axis of the fixed ring (14). The top end of the wedge-shaped pressing block (15) is fixedly connected to the fixed ring (14), the bottom end of the wedge-shaped pressing block (15) is in contact with the top end of the reset protrusion (16), and the bottom end of the reset protrusion (16) is fixedly connected to the upper surface of the rotating ring (10).

5. A grooving device for producing die-casting molds according to claim 3, characterized in that: The vibration damping components are provided in a plurality of form and are evenly distributed around the axis of the fixed ring (14). The vibration damping components include a damping rod (17), a damping ring (18), and a limiting block (19). The damping ring (18) is provided in a plurality of form. The bottom end of the damping rod (17) is fixedly connected to the upper surface of the fixed ring (14). The inner wall of the damping ring (18) is slidably connected to the damping rod (17). The damping ring (18) is distributed along the axis of the damping rod (17). The damping ring (18) located at the bottom is in contact with the fixed ring (14). The top end of the damping rod (17) is connected to the limiting block (19).

6. A grooving device for producing die-casting molds according to claim 4, characterized in that: The buffer assembly includes a buffer ring (20), a second connecting key (21), a second limiting ring (22), and a buffer spring (23). The inner wall of the buffer ring (20) is provided with a second sliding groove (24). The number, position, and tilt angle of the second connecting key (21) correspond to the number, position, and tilt angle of the first connecting key (11). One end of the second connecting key (21) is located above the first connecting key (11) and is fixedly connected to the rotating shaft (6). The other end of the second connecting key (21) is located in the second sliding groove (24) and is slidably connected to the buffer ring (20). The inner wall of the second limiting ring (22) is fixedly connected to the rotating shaft (6). The upper surface of the second limiting ring (22) is connected to the bottom end of the second connecting key (21). The lower surface of the buffer ring (20) is connected to the upper surface of the rotating ring (10) through the buffer spring (23) sleeved on the rotating shaft (6).

7. A grooving device for producing die-casting molds according to claim 2, characterized in that: The angle between the first connecting key (11) and the axis of the rotating shaft (6) is 5° to 10°.

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