Large-face milling cutter head

Abstract

The utility model discloses a cutterhead of a large-face milling cutter, which comprises a cutter rest, a center piece is assembled at the center of the cutter rest, and a cutter group is assembled at the bottom end of the cutter rest. The width of a milling plane and the milling sweeping surface can be adjusted by adjusting the center position between the center piece and the fixing frame or adjusting the internal and external distribution distance of the cutter group; the large-area milling cutter effectively solves the problem that the milling area is frequently and inconveniently adjusted due to the fact that an existing large-area milling cutter adopts a fixed cutter and a fixed cutter disc to achieve the purpose of adjusting the area only by replacing the whole cutter when milling faces with different areas are needed. A tool bit of an existing tool is inconvenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a large-surface milling cutter disc. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. Each tooth cuts off the excess of the workpiece intermittently in sequence during operation. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines.

[0003] In the actual machining process, the rough machining of the workpiece often requires milling out an initial flat plane as a basis, and then continuing the subsequent machining work on this basis, or in the machining process of some plate-type workpieces, it is often necessary to use tools with multiple cutter heads for plane milling. The existing milling tools are mostly discrete shape tools with fixed cutter heads, and their milling area is fixed. Moreover, the cutter heads of most cutters are integrally formed or fixed to the tool holder by structures such as rivets. Therefore, when milling surfaces of different areas are required, the purpose of adjusting the area can only be achieved by replacing the overall tool, which will cause the problem of frequent adjustment of the milling area. In addition, the cutter heads of existing fixed tools are inconvenient to replace. When a single tool is damaged, the tool can only be replaced as a whole. In view of the above problems, a large-surface milling cutter disc is specially proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a large-face milling cutter disc to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-face milling cutter disc, comprising a tool holder, a center piece is installed at the center of the tool holder, and a tool group is installed at the bottom end of the tool holder; the tool holder comprises a fixed frame, the fixed frame comprises a central fixed plate, a plurality of fixed claws are extended outward from the outer side of the fixed plate, the central axis of the fixed claws is eccentrically arranged with the center of the fixed plate, and the fixed claws are evenly distributed on the outer side of the fixed plate in a circular shape; a sleeve hole is opened on the top of the fixed claw; the tool group is installed at the bottom end of the fixed claw, the tool group comprises a connecting piece, a screw hole is opened on the top of the connecting piece, the screw hole coincides with the axis of the sleeve hole and bolts are installed inside the screw hole and the sleeve hole; a cutter head is installed downward on the outer side of the connecting piece; the number of the sleeve hole and the screw hole is at least one.

[0006] Preferably, a waist-shaped hole is provided at the center of the upper surface of the fixing plate, and evenly distributed square slots are provided at the bottom of the waist-shaped hole.

[0007] Preferably, a square slot penetrating the fixing plate is evenly formed at the center of the upper surface of the fixing plate.

[0008] Preferably, the center piece comprises a rotating head, a square clamping block is integrally formed on the top of the rotating head, the clamping block can be clamped in the inside of the clamping slot, and a screw is welded on the top of the clamping block.

[0009] Preferably, a mounting hole is formed at the outer end of the connecting piece, and a countersunk hole for mounting a positioning piece is formed on the outer wall of the mounting hole.

[0010] Preferably, a positioning block is welded to the top end of the cutter head, and the positioning block is sleeved inside the mounting hole.

[0011] Preferably, a conical positioning groove is provided on the outer wall of the positioning block at a position corresponding to the axis of the mounting hole.

[0012] Preferably, the slots and waist-shaped holes are arranged diagonally, and the slots are distributed at symmetrical intervals.

[0013] Preferably, the number of fixed claws used is at least 2 sets.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a cutter disc for a large-surface milling cutter with a tool group with adjustable installation position. When in use, according to the area and milling accuracy, the width of the milling plane and the milling swept surface can be adjusted by adjusting the center position between the center piece and the fixed frame or adjusting the inner and outer distribution spacing of the tool group. This effectively solves the problem that the existing large-area milling tools use fixed tools and fixed tool discs. When milling surfaces of different areas are required, the purpose of adjusting the area can only be achieved by replacing the overall tool, which will cause the problem of frequent and inconvenient adjustment of the milling area, and the existing tool heads are inconvenient to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is an assembly diagram of the utility model.

[0017] Figure 3 It is a top view of the assembly diagram of the utility model.

[0018] Figure 4 It is a bottom view of the assembly of the utility model.

[0019] Figure 5 This is a schematic diagram of a tool holder according to Embodiment 2 of the present utility model.

[0020] Figure 6 This is a bottom view of the tool holder according to the second embodiment of the present utility model.

[0021] Figure 7This is a schematic diagram of a tool holder according to Embodiment 1 of the present utility model.

[0022] Figure 8 This is a bottom view of a tool holder according to Embodiment 1 of the present utility model.

[0023] In the figure: 1. tool holder, 11. fixing frame, 12. slot, 13. sleeve hole, 14. clamping slot, 15. waist-shaped hole, 2. center piece, 21. rotating head, 22. clamping block, 23. screw, 3. tool assembly, 31. connecting piece, 32. screw hole, 33. mounting hole, 34. countersunk hole, 35. positioning block, 36. positioning slot, 37. tool head. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-8 The utility model provides a technical solution: a large-face milling cutter disc, comprising a tool holder 1, a center piece 2 is mounted at the center of the tool holder 1, and a tool group 3 is mounted at the bottom end of the tool holder 1; the tool holder 1 comprises a fixing frame 11, the fixing frame 11 comprises a central fixing plate, a plurality of fixing claws are arranged extending outward from the outer side of the fixing plate, the central axis of the fixing claws is eccentrically arranged with the center of the fixing plate, and the fixing claws are evenly distributed on the outer side of the fixing plate in a circumferential manner; a sleeve hole 13 is provided at the top of the fixing claw; the tool group 3 is mounted at the bottom end of the fixing claw, the tool group 3 comprises a connecting member 31, a screw hole 32 is provided at the top of the connecting member 31, the screw hole 32 coincides with the axis of the sleeve hole 13, and bolts are mounted inside the screw hole 32 and the sleeve hole 13; a cutter head 37 is mounted downward on the outer side of the connecting member 31; the number of the sleeve hole 13 and the screw hole 32 is at least one.

[0026] The utility model provides a cutter disc for a large-surface milling cutter with a tool group 3 with an adjustable installation position. When in use, the width of the milling plane and the milling swept surface can be adjusted according to the area and the milling accuracy by adjusting the center position between the center piece 2 and the fixed frame 11 or adjusting the inner and outer distribution spacing of the tool group 3. This effectively solves the problem that the existing large-area milling tool adopts fixed tools and fixed tool discs, and when the milling surface of different areas is required, the purpose of adjusting the area can only be achieved by replacing the overall tool, which will cause the problem of frequent and inconvenient adjustment of the milling area, and the existing tool head is inconvenient to replace.

[0027] Specifically, a waist-shaped hole 15 is opened at the center of the upper surface of the fixing plate, and evenly distributed square slots 14 are opened at the bottom of the waist-shaped hole 15. The waist-shaped hole 15 combined with the slot 14 is one of the embodiments of center fixation. When in use, the waist-shaped hole 15 at the top is combined with the slot 14 to achieve a stable clamping effect between the nut and the block 22. After the nut and the screw rod 23 are screwed and fixed, the nut and the block 22 can be stably clamped on the upper and lower walls of the waist-shaped hole 15, with a larger contact area, greater friction, and a smaller movable space, thereby having a more stable effect.

[0028] Specifically, a square slot 14 that passes through the fixing plate is evenly opened at the center of the upper surface of the fixing plate. Opening a slot 14 that completely passes through the top of the fixing plate is another embodiment of the center fixing method, which is mainly suitable for use with a larger tool holder 1. Through the deeper and larger slot 14, the contact area between the slot 14 and the block 22 can be increased, so that during milling, the resistance of the tool during rotating cutting can be stably offset, and the activity space between the slot 14 and the block 22 can be reduced, making the contact closer, avoiding passive yield deformation between the outer corners of the block 22 and the right-angled corners inside the slot 14, and avoiding the occurrence of disengagement. However, this method should be used in conjunction with the flange nut to increase the contact area of ​​the nut positioning and ensure the clamping effect.

[0029] Specifically, the center piece 2 includes a rotating head 21, and a square clamping block 22 is integrally formed on the top of the rotating head 21. The clamping block 22 can be clamped in the inside of the clamping slot 14, and a screw 23 is welded on the top of the clamping block 22;

[0030] When the block 22 is used inside the completely through-type slot 14 in the first embodiment, the thickness of the block 22 should be slightly smaller than the depth of the slot 14, at least the thickness of the block 22 should not be greater than the depth of the slot 14, to ensure that after the nut and the screw 23 are tightened, the nut can fit tightly with the fixing plate to avoid direct contact with the upper surface of the block 22. Of course, the most preferred method should be that the thickness of the block 22 is just equal to the depth of the slot 14, so that the nut fits tightly with the block 22 and the fixing plate at the same time. Of course, this installation method is more dependent on the flatness of the block 22 and the fixing plate, and tests the processing accuracy;

[0031] When the block 22 is used inside the waist-shaped hole 15 and the slot 14 in the second embodiment, it is sufficient to ensure that the thickness of the block 22 is not greater than the depth of the slot 14. Due to the wall thickness between the waist-shaped hole 15 and the slot 14, the thickness of the block 22 is slightly higher than the depth of the slot 14, which can also achieve a stable clamping and fixing effect.

[0032] Specifically, a mounting hole 33 is provided at the outer end of the connecting member 31, and a countersunk hole 34 for installing a positioning member is provided on the outer wall of the mounting hole 33. The interior of the countersunk hole is provided with a thread, and the interior of the countersunk hole 34 can be equipped with a positioning member such as a screw or a top screw to achieve quick clamping and fixation of the positioning block 35.

[0033] Specifically, a positioning block 35 is welded to the top of the cutter head 37 , and the positioning block 35 is sleeved inside the mounting hole 33 .

[0034] Specifically, a conical positioning groove 36 is provided at a position on the outer wall of the positioning block 35 corresponding to the axis of the mounting hole 33. The conical positioning groove 36 is conducive to the clamping and fixing of a top screw type fixing part, and a threaded hole can also be provided to directly screw and fix with a bolt.

[0035] Specifically, the slots 14 and the waist-shaped holes 15 are arranged diagonally, and the slots 14 are distributed at symmetrical intervals.

[0036] like Figure 4 As shown, the relationship between the position of the tool group and the center when it is installed will affect the radius of the travel position of the cutter head 37, so that double or even multiple cutters can be used to repeat the milling path for materials of different hardness through overlapping or staggered settings, or a single milling path can be directly staggered, thereby adjusting the cutting area of ​​the tool during milling. The center piece 2 whose center position can be adjusted can be fixed to the rotation center, and in the case of an eccentric setting, the milling area of ​​the whole set of tools can be further increased.

[0037] The eccentrically arranged fixed claw structure generally rotates in a vector square from a position with a large eccentric width to a position with a small eccentricity, for example Figure 3 As shown, the top view of the setting method of the whole set of tools is best achieved when the square is rotated clockwise. This effect can ensure the structural strength of the fixed claw through the structure with a large eccentric width, thereby having a better stability effect when receiving cutting resistance.

[0038] The number of fixed claws and corresponding tool groups 3 is at least 2 sets to achieve the above practical effects, preferably 4 sets or more.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A large face milling cutter head, comprising a cutter holder (1), characterized in that: A center piece (2) is mounted at the center of the tool holder (1), and a tool group (3) is mounted at the bottom end of the tool holder (1); the tool holder (1) comprises a fixing frame (11), the fixing frame (11) comprises a central fixing plate, a plurality of fixing claws are arranged on the outer side of the fixing plate extending outward, the central axis of the fixing claws is eccentrically arranged with the center of the fixing plate, and the fixing claws are evenly distributed on the outer side of the fixing plate in a circular shape; a sleeve hole (13) is provided at the top of the fixing claw; the tool group (3) is mounted at the bottom end of the fixing claw, the tool group (3) comprises a connecting piece (31), a screw hole (32) is provided at the top of the connecting piece (31), the screw hole (32) and the sleeve hole (13) are axially coincident, and bolts are installed inside the screw hole (32) and the sleeve hole (13); a cutter head (37) is mounted downward on the outer side of the connecting piece (31); the sleeve hole (13) and the screw hole (32) are provided in at least one number.

2. A large face milling cutter disc according to claim 1, characterized in that: A waist-shaped hole (15) is provided at the center of the upper surface of the fixing plate, and evenly distributed square slots (14) are provided at the bottom of the waist-shaped hole (15).

3. A large face milling cutter disc according to claim 1, characterized in that: A square card slot (14) penetrating the fixing plate is evenly arranged at the center of the upper surface of the fixing plate.

4. A large face milling cutter disc according to claim 2 or 3, characterized in that: The center piece (2) comprises a rotating head (21), the top of which is integrally formed with a square clamping block (22), the clamping block (22) being capable of being clamped in the interior of the clamping slot (14), and the top of which is welded with a screw (23).

5. The large face milling cutter disc according to claim 1, characterized in that: The outer end of the connecting piece (31) is provided with a mounting hole (33), and the outer wall of the mounting hole (33) is provided with a countersunk hole (34) for mounting a positioning piece.

6. A large face milling cutter disc according to claim 5, characterized in that: A positioning block (35) is welded to the top end of the cutter head (37), and the positioning block (35) is sleeved inside the mounting hole (33).

7. A large face milling cutter disc according to claim 6, characterized in that: A conical positioning groove (36) is provided on the outer wall of the positioning block (35) at a position corresponding to the axis of the mounting hole (33).

8. A large face milling cutter disc according to claim 2 or 3, characterized in that: The clamping slots (14) and the waist-shaped holes (15) are arranged in a diagonal state, and the clamping slots (14) are distributed at symmetrical intervals.

9. A large face milling cutter disc according to claim 2 or 3, characterized in that: The number of fixed claws used is at least 2 sets.

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