Center inner-cooling face milling cutter

Abstract

The utility model relates to a face milling cutter and aims to solve the technical problem that cuttings easily enter the bottom of an existing cutter to scratch a machined surface due to the fact that the existing cutter adopts a side cold hole cooling PCD cutter. The utility model provides a milling cutter with a central inner-cooling surface. The milling cutter comprises a cutter handle, a connecting bolt and a cutter head, wherein a stepped through hole is formed in the middle of the cutter head; the end face of one side of the nut abuts against the step of the stepped through hole, a baffle is arranged on the end face of the other side, and a liquid blocking gap is formed between the baffle and the bottom of the tool bit. A drainage gap is formed between the side part of the nut and the large end of the stepped through hole; the cutter handle extends into the small end of the stepped through hole and is in threaded connection with the stud; a center water inlet hole is formed in the middle of the cutter handle, a center water outlet hole is formed in the middle of the connecting bolt, a plurality of branch water outlet holes communicated with the center water outlet hole are formed in a nut of the connecting bolt, and the branch water outlet holes enable the liquid drainage gap to be communicated with the water outlet hole. The center water inlet hole, the center water outlet hole, the branch water outlet holes, the liquid discharging gap and the liquid blocking gap form a center inner cooling channel.

Description

Technical Field

[0001] The utility model relates to a face milling cutter tool, in particular to a center internal cooling face milling cutter tool. Background Art

[0002] With the development of the automotive industry, higher requirements are put forward for processing efficiency, tool life, processing cycle, etc. In order to meet the above requirements, PCD (polycrystalline diamond) tools are used in more and more scenarios in the automotive industry. In order to improve the life of PCD tools, the PCD cutting edge needs to be cooled during processing.

[0003] The conventional cooling method uses a drilling machine to drill side cooling holes to cool PCD. This method has low production efficiency. When using this method on a PCD face milling cutter disc, during the use of the tool, chips may enter the bottom surface of the tool, scratch the machined surface, and produce defective products. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem that when the existing tool uses side cooling holes to cool the PCD tool, chips are likely to enter the bottom of the tool and scratch the machined surface, and to provide a center internal cooling face milling cutter tool.

[0005] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0006] A center internal cooling face milling cutter tool includes a tool shank, a connecting bolt, and a cutter head with a stepped through hole in the middle.

[0007] The nut of the connecting bolt is placed inside the large end of the stepped through hole. One side end face of the nut abuts against the step of the stepped through hole, and a baffle is provided on the other side end face. There is a liquid blocking gap between the baffle and the bottom of the cutter head; there is a liquid drainage gap between the side part of the nut and the large end of the stepped through hole.

[0008] The stud of the connecting bolt is placed inside the small end of the stepped through hole, and the tool shank extends into the small end of the stepped through hole and is threadedly connected with the stud.

[0009] A center water inlet hole is provided in the middle of the tool shank, a center water outlet hole is provided in the middle of the connecting bolt, and a plurality of branch water outlet holes communicating with the center water outlet hole are provided on the nut of the connecting bolt. The branch water outlet holes connect the liquid drainage gap with the water outlet hole.

[0010] The center water inlet hole, the center water outlet hole, the branch water outlet holes, the liquid drainage gap, and the liquid blocking gap form a center internal cooling channel.

[0011] Further, the tool shank includes a clamping section and an installation section.

[0012] The clamping section is connected to the spindle of the machine tool.

[0013] The installation section is stepped. The large end of the installation section is connected to the clamping section, and the small end of the installation section extends into the small end of the stepped through hole and is threadedly connected to the stud.

[0014] Furthermore, a plurality of circumferentially evenly distributed PCD blades are provided on the outer side wall of the tool head.

[0015] Furthermore, a plurality of tool holder grooves equal in number to the PCD blades are formed on the outer side wall of the tool head. A tool holder is provided in the tool holder groove, and the PCD blade is installed at the bottom of the tool holder.

[0016] Furthermore, an adjusting bolt axially arranged along the tool head is threadedly installed in the tool holder groove of the tool head, and the bottom end of the adjusting bolt abuts against the upper surface of the tool holder.

[0017] Furthermore, the tool holder is installed in the tool holder groove through a locking screw.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] For the center internal cold face milling cutter tool provided by the present utility model, the central water inlet hole on the tool shank is communicated with the cutting fluid interface of the machine tool. The cutting fluid is discharged from the central water inlet hole, the central water outlet hole, the branch water outlet hole, the liquid discharge gap and the liquid blocking gap. Under the blocking action of the baffle, the cutting fluid will not directly flow into the bottom of the tool head between the workpiece through the liquid discharge gap. Under the action of the baffle, the cutting fluid can be evenly dispersed under the action of centrifugal force and has a certain impact force. When the cutting fluid is dispersed, the chips can be washed out, avoiding the problem that the chips enter the bottom of the tool and scratch the machined surface due to the use of side cold holes to cool the PCD tool. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2 is an internal structural schematic diagram of an embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the tool head and the connecting bolt in an embodiment of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the connecting bolt in an embodiment of the present utility model.

[0024] Description of the reference numerals: 1 is the tool shank, 11 is the clamping section, 12 is the installation section, 2 is the connecting bolt, 21 is the nut, 22 is the stud, 3 is the tool head, 31 is the stepped through hole, 4 is the baffle, 5 is the liquid blocking gap, 6 is the liquid discharge gap, 7 is the central water inlet hole, 8 is the central water outlet hole, 9 is the branch water outlet hole, 10 is the PCD blade, 13 is the tool holder groove, 14 is the tool holder, 15 is the adjusting bolt. Detailed Embodiment

[0025] The technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] As Figure 1 and Figure 2 shown, a center internal-coolant face milling cutter tool includes a tool shank 1, a connecting bolt 2, and a cutter head 3 with a stepped through hole 31 formed in the middle; the tool shank 1 includes a clamping section 11 and an installation section 12; the installation section 12 is stepped, and the clamping section 11 is connected to the spindle of the machine tool; a center water inlet hole 7 is formed in the middle of the tool shank 1, and the center water inlet hole 7 of the tool shank 1 is communicated with the cutting fluid interface of the machine tool.

[0027] As Figure 3 shown, the nut 21 of the connecting bolt 2 is placed inside the large end of the stepped through hole 31, one side end face of the nut 21 abuts against the step of the stepped through hole 31, a baffle 4 is provided on the other side end face, and a liquid blocking gap 5 is provided between the baffle 4 and the bottom of the cutter head 3; a liquid drainage gap 6 is provided between the side part of the nut 21 and the large end of the stepped through hole 31; the stud 22 of the connecting bolt 2 is placed inside the small end of the stepped through hole 31, and the small end of the installation section 12 of the tool shank 1 extends into the small end of the stepped through hole 31 and is threadedly connected to the stud 22, and the large end of the installation section 12 is connected to the clamping section 11; as Figure 4 shown, a center water outlet hole 8 is formed in the middle of the connecting bolt 2, and a plurality of branch water outlet holes 9 communicating with the center water outlet hole 8 are formed on the nut 21 of the connecting bolt 2, and the branch water outlet holes 9 communicate the liquid drainage gap 6 with the water outlet hole; the center water inlet hole 7, the center water outlet hole 8, the branch water outlet holes 9, the liquid drainage gap 6 and the liquid blocking gap 5 form a center internal-coolant channel.

[0028] In order to enable the face milling cutter tool to achieve the function of milling a plane, as Figure 1 and Figure 2 shown, a plurality of tool holder grooves 13 with the same number as the PCD blades 10 are formed on the outer side wall of the cutter head 3, a tool holder 14 is installed in the tool holder groove 13 through a locking screw, and the PCD blade 10 is installed at the bottom of the tool holder 14.

[0029] In order to facilitate the adjustment of the position of the PCD blade 10 on the cutter head 3, as Figure 2 and Figure 3 shown, an adjusting bolt 15 arranged along the axial direction of the cutter head 3 is threadedly installed in the tool holder groove 13 of the cutter head 3, the bottom end of the adjusting bolt 15 abuts against the upper surface of the tool holder 14, and by rotating the adjusting bolt, the tool holder 14 can be extruded through the adjusting bolt, so that the position of the PCD blade 10 on the cutter head 3 is changed.

[0030] For the center internal cold surface milling cutter tool on the tool shank 1 provided by the present utility model, during use, connect the clamping section 11 of the tool shank 1 to the machine tool spindle, and connect the central water inlet hole 7 of the tool shank 1 to the cutting fluid interface of the machine tool; start the machine tool, and the rotation of the machine tool spindle drives the tool head 3 to perform milling processing on the workpiece plane;

[0031] Meanwhile, the cutting fluid is discharged from the central water inlet hole 7, the central water outlet hole 8, the branched water outlet holes 9, the drainage gap 6 and the liquid blocking gap 5. Under the blocking action of the baffle 4 and the action of centrifugal force, the cutting fluid is evenly dispersed and has a certain impact force;

[0032] The chips generated during processing are washed away, avoiding the problem that when using side cold holes to cool the PCD tool, the chips enter the bottom of the tool and scratch the machined surface.

[0033] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the said claims.

Claims

1. A center-cooled face milling cutter tool, characterized in that: It includes a tool shank (1), a connecting bolt (2), and a tool tip (3) with a stepped through-hole (31) in the middle; The nut (21) of the connecting bolt (2) is placed inside the large end of the stepped through-hole (31). One side end face of the nut (21) abuts tightly against the step of the stepped through-hole (31), and a baffle (4) is provided on the other side end face. There is a liquid-blocking gap (5) between the baffle (4) and the bottom of the tool tip (3); there is a liquid-draining gap (6) between the side part of the nut (21) and the large end of the stepped through-hole (31); The stud (22) of the connecting bolt (2) is placed inside the small end of the stepped through-hole (31). The tool shank (1) extends into the small end of the stepped through-hole (31) and is threadedly connected to the stud (22); A central water inlet hole (7) is provided in the middle of the tool shank (1), a central water outlet hole (8) is provided in the middle of the connecting bolt (2), and a plurality of branched water outlet holes (9) communicating with the central water outlet hole (8) are provided on the nut (21) of the connecting bolt (2). The branched water outlet holes (9) connect the liquid-draining gap (6) with the water outlet hole; The central water inlet hole (7), the central water outlet hole (8), the branched water outlet holes (9), the liquid-draining gap (6), and the liquid-blocking gap (5) form a central internal cooling channel.

2. The center inner cold face milling cutter tool according to claim 1, characterized in that: The tool shank (1) includes a clamping section (11) and a mounting section (12); The clamping section (11) is connected to the main shaft of the machine tool; The mounting section (12) is stepped. The large end of the mounting section (12) is connected to the clamping section (11), and the small end of the mounting section (12) extends into the small end of the stepped through-hole (31) and is threadedly connected to the stud (22).

3. The center internal cold face milling cutter tool according to claim 1, wherein: A plurality of circumferentially evenly distributed PCD blades (10) are provided on the outer side wall of the tool tip (3).

4. The center internal cold face milling cutter tool according to claim 3, characterized in that: A plurality of tool-holder grooves (13) with the same number as the PCD blades (10) are provided on the outer side wall of the tool tip (3). Tool holders (14) are provided in the tool-holder grooves (13), and the PCD blades (10) are installed at the bottom of the tool holders (14).

5. The center internal cold face milling cutter tool according to claim 4, characterized in that: An adjusting bolt (15) arranged along the axial direction of the tool tip (3) is threadedly installed in the tool-holder groove (13) of the tool tip (3), and the bottom end of the adjusting bolt (15) abuts against the upper surface of the tool holder (14).

6. The inner-cooling face milling cutter tool according to claim 4, wherein: The tool holder (14) is installed in the tool-holder groove (13) by a locking screw.

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