A combination milling cutter for sheet metal processing

Abstract

This utility model relates to the field of milling cutter technology, specifically to a combined milling cutter for sheet metal processing, comprising: an assembly shaft, a circular mounting plate fitted to the lower end of the assembly shaft, a plurality of fixing blocks connected in an annular array to the outer circumference of the circular mounting plate, each fixing block having a connecting block connected to it, and a number of milling cutter heads equal to the number of fixing blocks. Each milling cutter head has a connecting hole adapted to the connecting blocks, and a limiting mechanism to prevent the milling cutter heads from detaching from the connecting blocks is also included. The limiting mechanism comprises an annular disc and an internally threaded locking disc arranged sequentially from bottom to top. The annular disc is fitted onto the outer circumference of the assembly shaft, and the internally threaded locking disc is helically connected to the outer circumference of the assembly shaft. An annular array to the outer circumference of the annular disc is connected to a limiting assembly equal to the number of milling cutter heads, and an annular array to the outer circumference of the annular disc is connected to a plurality of swing-type pressure roller assemblies, suitable for preventing the internally threaded locking disc from loosening. This utility model has a reasonable structure, enhances operational convenience, and improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and in particular to a combined milling cutter for sheet metal processing. Background Technology

[0002] The milling cutter is the core rotary tool in milling machining. Its machining principle uses the rotation of the cutter as the main motion, combined with the linear / curved movement of the workpiece or cutter as the feed motion. Through the relative motion between the two, excess material is removed from the workpiece surface, ultimately achieving the machining of complex geometries such as planes, grooves, steps, curved surfaces, and gears. Depending on the material of the cutter (e.g., high-speed steel, cemented carbide, ceramics), milling cutters can be adapted to the machining needs of both metallic materials (steel, aluminum, copper, titanium alloys, etc.) and non-metallic materials (plastics, wood, composite materials, etc.), widely serving multiple industries such as machinery manufacturing, aerospace, and automotive parts. Among the specific types of milling cutters, end mills and combination face mills are two commonly used types: end mills adopt a coaxial structure design of the shank and the cutting part, which can flexibly complete the machining of planes, grooves, and sides. Some end mills with end cutting edges can also achieve the composite machining function of "drilling and milling in one". Combination face mills are mainly used for machining large-area planes. Their cutting part is disc-shaped, and the cutting edges are distributed on the end face and outer circle of the disc, which has significant advantages such as high machining efficiency and excellent flatness accuracy.

[0003] Regarding the practical application of the aforementioned combined face milling cutter, the inventors discovered that during the surface machining of materials, the cutting edge of the tool is under high-frequency cutting conditions for extended periods, easily leading to severe wear. When the cutting edge wears down, the old milling cutter must first be removed from the tool holder, replaced with a new one, and then the cutter must be fixed to the tool holder using screws. If a large number of milling cutters need to be replaced, the repeated removal and installation of screws consumes a significant amount of time, reducing operational convenience and directly causing a decrease in overall machining efficiency. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a combined milling cutter for sheet metal processing, which enhances the convenience of operation and improves work efficiency.

[0005] To solve the above-mentioned technical problems, the present invention provides a combined milling cutter for sheet metal processing, comprising: an assembly shaft, a circular mounting plate being fitted to the lower end of the assembly shaft, a plurality of fixing blocks being connected to the outer annular array of the circular mounting plate, and insertion blocks being connected to the fixing blocks respectively; a number of milling cutter heads equal to the number of fixing blocks, wherein the milling cutter heads are provided with insertion holes adapted to the insertion blocks; and a limiting mechanism for preventing the milling cutter heads from disengaging from the insertion blocks.

[0006] The limiting mechanism includes a circular disc and an internal thread locking disc arranged sequentially from bottom to top. The circular disc is fitted onto the outer circle of the assembly shaft, and the internal thread locking disc is spirally connected to the outer circle of the assembly shaft. The outer circle of the circular disc is connected with a ring array of limiting components equal to the number of milling cutter heads. The outer circle of the circular disc is connected with a number of swing-type pressure roller assemblies, which are suitable for preventing the internal thread locking disc from loosening.

[0007] By adopting the above technical solution, during the installation of the combined milling cutter, firstly, the insertion hole of the milling cutter head is aligned with the insertion block on the fixing block and fitted together, ensuring that the milling cutter head and the fixing block are completely and tightly fitted, thus completing the initial positioning of the milling cutter head. After the milling cutter head is initially positioned, the annular disc is first coaxially fitted onto the outer surface of the assembly shaft, and then the internal thread locking disc is screwed to the assembly shaft through a threaded structure. As the internal thread locking disc is gradually tightened, it will apply an axial compressive force to the annular disc below, firmly fixing the annular disc to the assembly shaft; at the same time, the pre-set limiting components on the annular disc will act synchronously on the milling cutter head, forming a double limiting structure of axial and radial directions, ultimately achieving a reliable fixing effect that prevents the milling cutter head from detaching from the insertion block. To further improve the overall stability after assembly, several swing-type pressure roller assemblies are connected in a ring array on the outer surface of the annular disc. After assembly, the oscillating pressure roller assembly maintains tight contact with the upper surface of the internal thread locking disc. Through static friction, it effectively prevents the internal thread locking disc from loosening during machining, significantly enhancing the overall stability and machining reliability of the combined milling cutter. This assembly structure eliminates the need for screws to fix the milling cutter head to the circular mounting disc. When installing a large number of milling cutter heads, it eliminates the cumbersome process of traditional screw removal and installation, greatly saving overall installation time and significantly improving assembly efficiency.

[0008] In a preferred embodiment, the present invention can be further configured such that: the limiting component includes a V-groove disposed on the flat surface of the milling cutter head and a V-block disposed within the V-groove, a strip block is connected to the upper surface of the V-block, and one end of the strip block is connected to the outer circle of the annular disk.

[0009] By adopting the above technical solution, the V-block is connected to the outer circle of the annular disk through the strip block. The V-block is inserted into the V-groove and prevents the milling cutter head from moving away from the fixed block, thus achieving the purpose of limiting the position.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the upper surface of the internal thread locking disc is provided with an annular V-shaped groove; the swing-type pressure roller assembly includes an inverted elastic J-shaped rod; the lower end of the elastic J-shaped rod is hinged to a U-shaped fixing seat; the other end of the elastic J-shaped rod is provided with a mounting groove; a pressure roller body is rotatably connected in the mounting groove; and the pressure roller body is in close contact with the inner surface of the annular V-shaped groove.

[0011] By adopting the above technical solution, the elastic J-shaped rod is deformed and oscillated, which drives the pressure roller in the mounting groove on the elastic J-shaped rod to make close contact with the inner surface of the annular V-shaped groove. There is a large static friction between the pressure roller and the annular V-shaped groove. This static friction prevents the internal thread locking disc from rotating in the opposite direction and loosening, thereby enhancing the overall stability and machining reliability of the combined milling cutter.

[0012] In a preferred embodiment, the present invention can be further configured such that: the outer circular surface of the pressure roller body is provided with a grid pattern, and the inner surface of the annular V-shaped groove is provided with a longitudinal pattern.

[0013] By adopting the above technical solution, the grid pattern on the pressure roller body is in close contact with the longitudinal pattern on the inner surface of the annular V-shaped groove, which increases the coefficient of friction between the two, that is, increases the static friction force.

[0014] In a preferred embodiment, the present invention can be further configured such that the outer circular surface of the internal thread locking disc is provided with a plurality of arc-shaped grooves.

[0015] By adopting the above technical solution, a special open-end wrench can be used to insert into the arc groove on the internal thread locking disc, making it easy to rotate the internal thread locking disc to achieve the purpose of tightening or loosening.

[0016] In a preferred embodiment, the present invention can be further configured such that the lower plane of the milling cutter head is lower than the lower plane of the circular mounting plate.

[0017] By adopting the above technical solution, interference between the circular mounting plate and the material is prevented during the milling process.

[0018] In summary, this utility model has at least one of the following beneficial technical effects:

[0019] 1. No screws are needed to fix the milling cutter head to the circular mounting plate, eliminating the screw removal and installation process. This significantly saves time when installing multiple sets of milling cutter heads and greatly improves assembly efficiency.

[0020] 2. The circular disc limiting assembly forms a dual axial and radial limiting mechanism. Combined with the static friction generated by the swing-type pressure roller assembly, it can effectively prevent the milling cutter head from disengaging and the internal thread locking disc from loosening in the reverse direction, thus ensuring assembly stability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of a combined milling cutter for sheet metal processing according to this utility model.

[0023] Figure 2 yes Figure 1 Sectional view along line AA.

[0024] Figure 3 yes Figure 1 A schematic diagram of the structure connecting the middle limit component, the milling cutter head, the fixing block, and the plug-in block.

[0025] In the diagram: 1. Assembly shaft; 2. Circular mounting plate; 3. Fixing block; 4. Insertion block; 5. Milling cutter head;

[0026] 6. Circular disc; 7. Internal threaded locking disc; 80. Limiting assembly; 90. Swinging pressure roller assembly; 11. Annular V-shaped groove; 12. Grid pattern; 13. Longitudinal pattern; 14. Arc groove; 15. Insertion hole;

[0027] 81. V-groove; 82. V-block; 83. Strip block;

[0028] 91. Flexible J-shaped rod; 92. U-shaped fixing seat; 93. Mounting groove; 94. Pressure roller body. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] Reference Figures 1-3This utility model discloses a combined milling cutter for sheet metal processing, comprising: an assembly shaft 1, a circular mounting plate 2 fitted to the lower end of the assembly shaft 1, a plurality of fixing blocks 3 connected to the outer annular array of the circular mounting plate 2, and insertion blocks 4 connected to the fixing blocks 3 respectively; milling cutter heads 5 in the same number as the fixing blocks 3, the milling cutter heads 5 having insertion holes 15 adapted to the insertion blocks 4; and a limiting mechanism to prevent the milling cutter heads 5 from disengaging from the insertion blocks 4.

[0032] The limiting mechanism includes a circular disc 6 and an internal thread locking disc 7 arranged sequentially from bottom to top. The circular disc 6 is fitted onto the outer circle of the assembly shaft 1, and the internal thread locking disc 7 is spirally connected to the outer circle of the assembly shaft 1. The outer circle of the circular disc 6 is connected to a ring array of limiting components 80 in a number equal to that of the milling cutter head 5. The outer circle of the circular disc 6 is connected to a number of swing-type pressure roller assemblies 90, which are suitable for preventing the internal thread locking disc 7 from loosening.

[0033] The upper surface of the internal thread locking disc 7 is provided with an annular V-shaped groove 11. The swing-type pressure roller assembly 90 includes an inverted elastic J-shaped rod 91, which is made of elastic steel. The lower end of the elastic J-shaped rod 91 is hinged to a U-shaped fixing seat 92, and the other end of the elastic J-shaped rod 91 is provided with a mounting groove 93. A pressure roller body 94 is rotatably connected in the mounting groove 93. The pressure roller body 94 and the elastic J-shaped rod 91 are connected by a pin, and the pressure roller body 94 is in close contact with the inner surface of the annular V-shaped groove 11. By operating the elastic J-shaped rod 91 to deform and swing, the pressure roller body 94 in the mounting groove 93 on the elastic J-shaped rod 91 is driven to make close contact with the inner surface of the annular V-shaped groove 11. There is a large static friction between the pressure roller body 94 and the annular V-shaped groove 11. This static friction prevents the internal thread locking disc 7 from rotating in the opposite direction and loosening, thus enhancing the overall stability and machining reliability of the combined milling cutter.

[0034] The outer surface of the pressure roller body 94 is provided with a grid pattern 12, and the inner surface of the annular V-shaped groove 11 is provided with a longitudinal pattern 13. The grid pattern 12 on the pressure roller body 94 is in close contact with the longitudinal pattern 13 on the inner surface of the annular V-shaped groove 11, which increases the coefficient of friction between the two, that is, increases the static friction force.

[0035] The limiting component 80 includes a V-groove 81 on the upper surface of the milling cutter head 5 and a V-block 82 disposed within the V-groove 81. A strip block 83 is connected to the upper surface of the V-block 82, and one end of the strip block 83 is connected to the outer circle of the annular disk 6. The V-block 82 is connected to the outer circle of the annular disk 6 through the strip block 83. The V-block 82 is engaged in the V-groove 81, preventing the milling cutter head 5 from moving away from the fixed block 3, thus achieving the purpose of limiting movement.

[0036] The outer circular surface of the internal thread locking disc 7 is provided with several arc-shaped grooves 14. A special open-end wrench can be used to insert into the arc-shaped grooves 14 on the internal thread locking disc 7 to facilitate the rotation of the internal thread locking disc 7 to achieve the purpose of tightening or loosening.

[0037] The lower plane of the milling cutter head 5 is lower than the lower plane of the circular mounting plate 2. This prevents the circular mounting plate 2 from interfering with the material during the milling process.

[0038] The implementation principle of this embodiment is as follows: During the installation of the combined milling cutter, firstly, the insertion hole 15 of the milling cutter head 5 is aligned with the insertion block 4 on the fixing block 3 and fitted to ensure that the milling cutter head 5 and the fixing block 3 are completely and tightly fitted, thus completing the initial positioning of the milling cutter head. After the milling cutter head 5 is initially positioned, the annular disk 6 is first coaxially fitted onto the outer circular surface of the assembly shaft 1, and then the internal thread locking disk 7 is screwed to the assembly shaft 1 through a threaded structure. As the internal thread locking disk 7 is gradually tightened, it will apply an axial compressive force to the annular disk 6 below, so that the annular disk 6 is firmly fixed on the assembly shaft 1; at the same time, the limiting component 80 pre-set on the annular disk 6 will act synchronously on the milling cutter head 5, forming a double limiting structure of axial and radial, ultimately achieving a reliable fixing effect that prevents the milling cutter head 5 from detaching from the insertion block 4. To further improve the overall stability after assembly, the outer circular surface of the annular disk 6 is connected with several swing-type pressure roller components 90 in a ring array. After the entire assembly is completed, the oscillating pressure roller assembly 90 maintains close contact with the upper surface of the internal thread locking disc 7. Through static friction, it effectively prevents the internal thread locking disc 7 from loosening during machining, significantly enhancing the overall stability and machining reliability of the combined milling cutter. This assembly structure eliminates the need for screws to fix the milling cutter head 5 to the circular mounting disc 2. When installing a large number of milling cutter heads 5, the cumbersome process of traditional screw removal and installation is eliminated, greatly saving overall installation time and significantly improving the efficiency of the assembly operation.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A combined milling cutter for sheet metal processing, characterized in that, include: The assembly shaft (1) is fitted with a circular mounting plate (2) at its lower end. The outer ring array of the circular mounting plate (2) is connected with a number of fixing blocks (3). Each fixing block (3) is connected with a plug-in block (4). The assembly shaft (1) also includes a number of milling cutter heads (5) equal to the number of fixing blocks (3). Each milling cutter head (5) is provided with a plug-in hole (15) adapted to the plug-in block (4). The assembly shaft (1) also includes a limiting mechanism to prevent the milling cutter head (5) from disengaging from the plug-in block (4). The limiting mechanism includes a circular disc (6) and an internal thread locking disc (7) arranged sequentially from bottom to top. The circular disc (6) is fitted on the outer circle of the assembly shaft (1), and the internal thread locking disc (7) is spirally connected to the outer circle of the assembly shaft (1). The outer circle of the circular disc (6) is connected with a ring array of limiting components (80) equal in number to the milling cutter head (5). The outer circle of the circular disc (6) is connected with a number of swing-type pressure roller assemblies (90), which are suitable for preventing the internal thread locking disc (7) from loosening.

2. The combined milling cutter for sheet metal processing according to claim 1, characterized in that, The limiting component (80) includes a V-groove (81) on the upper plane of the milling cutter head (5) and a V-block (82) in the V-groove (81). A strip block (83) is connected to the upper plane of the V-block (82), and one end of the strip block (83) is connected to the outer circle of the annular disk (6).

3. The combined milling cutter for sheet metal processing according to claim 1, characterized in that, The upper surface of the internal thread locking disc (7) is provided with an annular V-shaped groove (11). The swing-type pressure roller assembly (90) includes an inverted elastic J-shaped rod (91). The lower end of the elastic J-shaped rod (91) is hinged to a U-shaped fixing seat (92). The other end of the elastic J-shaped rod (91) is provided with a mounting groove (93). A pressure roller body (94) is rotatably connected in the mounting groove (93). The pressure roller body (94) is in close contact with the inner surface of the annular V-shaped groove (11).

4. The combined milling cutter for sheet metal processing according to claim 3, characterized in that, The outer surface of the pressure roller body (94) is provided with a grid pattern (12), and the inner surface of the annular V-shaped groove (11) is provided with a longitudinal pattern (13).

5. The combined milling cutter for sheet metal processing according to claim 1, characterized in that, The outer circular surface of the internal thread locking disc (7) is provided with several arc-shaped grooves (14).

6. The combined milling cutter for sheet metal processing according to claim 1, characterized in that, The lower plane of the milling cutter head (5) is lower than the lower plane of the circular mounting plate (2).

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