Double-V-shaped clamping multi-specification adaptive modular cutter with chip removal and cooling functions

Abstract

The invention provides a dual-V-shaped clamping multi-specification adaptive modular cutter with chip removal and cooling functions, and relates to the technical field of hole machining cutters, the dual-V-shaped clamping multi-specification adaptive modular cutter comprises a cutter bar and a cutting head, the cutting head is provided with a connecting hole, and a positioning rod is arranged at the lower end of the cutting head; the top of the cutter bar comprises a V-shaped end, the inner side of the V-shaped end comprises two V-shaped faces, and the V-shaped end penetrates through the connecting hole through a locking bolt to achieve fixation of the cutter bar and the cutting head. A positioning hole is formed in the bottom of the V end, a pre-tightening assembly matched with the positioning hole is arranged at the lower end of the positioning rod, five-face positioning of the cutting head is achieved through matching of the V end on the cutter bar and the supporting face, in the installation process, by installing the pre-tightening assembly in advance, the cutting head can be conveniently installed in the V end, pre-tightening force can be provided, and therefore the cutting head can be installed conveniently. And the cutting head and the V end can be conveniently fixed by the locking bolt.

Description

Technical Field

[0001] This invention relates to the field of hole machining tool technology, specifically to a modular tool with chip removal and cooling that features double V-clamping and multi-specification adaptability. Background Technology

[0002] In machining, high-efficiency machining requires the use of superhard material cutting tools, such as cemented carbide. These are made from precious or rare metals like tungsten carbide, cobalt, tantalum, and niobium, which are scarce and expensive. Therefore, designing and developing a safe and reliable modular cutting tool structure can reduce the amount of superhard material used, thereby lowering operating costs without compromising efficiency.

[0003] The existing modular tool connection methods have the following shortcomings: 1. The planar clamping method has low and unstable positioning accuracy; 2. The clamping force point is far from the working force point, resulting in insufficient clamping rigidity; 3. The lack of a bolt-locking structure causes the working blade to fall off due to the different thermal expansion coefficients of different materials during high-temperature processing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a modular cutting tool with chip removal and cooling that features double V-clamping and multi-specification compatibility, thus solving the deficiencies in the connection methods of modular cutting tools in existing technologies.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a modular cutting tool with chip removal and cooling, which is compatible with multiple specifications and has double V-shaped clamping, includes a tool holder and a cutting head, wherein the cutting head is provided with a connecting hole and a positioning rod is provided at the lower end of the cutting head; The top of the tool holder includes a V-end, and the inner side of the V-end includes two V-shaped surfaces. The V-end is fixed to the tool holder and the cutting head by passing a locking bolt through the connecting hole. The bottom of the V-end is provided with a positioning hole, and the lower end of the positioning rod is provided with a pre-tightening component that matches the positioning hole.

[0006] Preferably, the V-shaped surfaces are distributed at 180 degrees, the bottom of the V-end includes a support surface, and the end face of the cutting head connecting positioning rod mates with the support surface.

[0007] Preferably, a chip removal groove is provided on the outer side of the tool holder, and the upper end of the chip removal groove corresponds to the position between the V-shaped surface.

[0008] Preferably, the cutting head is provided with two cutting edges, which extend continuously from the upper end to the position of the corresponding chip removal groove, and the upper end of the chip removal groove is aligned with the lower end of the cutting edge.

[0009] Preferably, the pre-tightening assembly includes a retaining ring, an L-block, a pre-tightening connector, and a connecting ring. The pre-tightening connector is fixed between the retaining ring and the connecting ring, and the end of the vertical portion of the L-block is fixed to the connecting ring.

[0010] Preferably, the outer side of the positioning rod is provided with an L-groove, which engages with the L-block through a sliding fastener.

[0011] Preferably, the upper side of the connecting ring is provided with a groove, and a gasket is fixedly attached inside the groove.

[0012] Preferably, the two parts of the V end are respectively provided with a threaded hole and a smooth hole, and the locking bolt passes through the smooth hole and is threadedly connected to the threaded hole after passing through the connecting hole.

[0013] Preferably, a coolant channel is provided in the middle of the tool holder, and the coolant channel is connected to an outlet hole on the upper side of the corresponding chip removal groove.

[0014] This invention provides a modular cutting tool with chip removal and cooling, featuring double V-clamping and multi-size adaptability. It offers the following advantages: In this invention, the cutting head is positioned in five directions by the cooperation between the V-end on the tool holder and the support surface. During the installation process, the pre-tightening component is pre-installed, which not only makes it easy to install the cutting head in the V-end, but also provides pre-tightening force to facilitate the locking bolts to fix the cutting head and the V-end.

[0015] In this invention, by installing damping oil in the positioning hole and cooperating with the elasticity of the pre-tightening connector, the mechanical vibration during the cutting process of the tool is converted into heat. Combined with the cutting fluid flowing through the coolant channel and outlet hole, the service life of the tool is improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a cross-sectional view of the present invention at point AA; Figure 5 This is a cross-sectional view at point BB of the present invention; Figure 6 This is a schematic diagram showing the connection between the positioning rod and the pre-tightening assembly in this invention; Figure 7 This is a schematic diagram of the structure of the mounting groove and positioning hole at the V end in this invention; Figure 8 This is a schematic diagram of the structure of the threaded hole and the smooth hole at the V end in this invention; Figure 9This is a schematic diagram of the coolant channel and outlet hole inside the tool holder in this invention.

[0017] The components are as follows: 1. Tool holder; 2. Chip removal groove; 3. Cutting head; 4. Locking bolt; 5. Connecting ring; 6. Pre-tightening connector; 7. L-block; 8. Snap ring; 9. Washer; 101. V-end; 102. Positioning hole; 103. Snap groove; 104. V-shaped clamping surface; 105. Mounting groove; 106. Support surface; 108. Threaded hole; 109. Smooth hole; 110. Coolant channel; 111. Coolant outlet; 301. Positioning rod; 302. Cutting edge; 303. V-shaped surface; 304. Connecting hole; 305. L-groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0019] like Figure 1-8 As shown, this embodiment of the invention provides a modular cutting tool with chip removal and cooling that is compatible with multiple specifications and features double V-clamping. It includes a tool holder 1 and a cutting head 3. The cutting head 3 is provided with a connecting hole 304 and a positioning rod 301 at its lower end. The tool holder 1 is a drilling tool holder, milling tool holder, reaming tool holder, or boring tool holder, while the cutting head 3 is a carbide (or other hard material) cutting head, which can be used as a drilling tool, milling tool, reaming tool, or boring tool. The tool holder 1 and the cutting head 3 are used in a corresponding and compatible manner. The top of the tool holder 1 includes a V-end 101. The inner side of the V-end 101 includes two V-shaped surfaces 303. The angle of the V-shaped included angle corresponding to the V-shaped surfaces 303 is adjusted according to the tool requirements of different working conditions. Cutting heads of different diameters are designed with different thicknesses of V-shaped surfaces to ensure that the strength of the cutting head and the strength of the V-shaped jaws of the steel tool holder are balanced. The V-end 101 is fixed to the tool holder 1 and the cutting head 3 by passing the locking bolt 4 through the connecting hole 304. Specifically, the two parts of the V-end 101 are respectively provided with threaded holes 108 and smooth holes 109. The locking bolt 4 is inserted from the smooth hole 109 and threadedly connected to the threaded hole 108 after passing through the connecting hole 304. The hole axes of the threaded hole 108 and the smooth hole 109 are coincident and both are 0.005-0.05mm lower than the axis of the connecting hole 304. In this way, after the locking bolt 4 is installed to connect the V-end 101 and the cutting head 3, the cutting head 3 is pressed downward. A positioning hole 102 is provided at the bottom of the V end 101, and a pre-tightening component that matches the positioning hole 102 is provided at the lower end of the positioning rod 301. The pre-tightening component is used to pull the cutting head 3 towards the V end 101, so that the locking bolt 4 can be inserted into the light hole 109 and threaded in the threaded hole 108.

[0020] The V-shaped surfaces 303 are distributed at 180 degrees. The bottom of the V-end 101 includes a support surface 106. After the cutting head 3 is fixed by the locking bolt 4, it is pressed down onto the support surface 106. The end face of the positioning rod 301 of the cutting head 3 cooperates with the support surface 106. The two V-shaped surfaces 303 cooperate with the support surface 106 to achieve five-sided over-positioning of the cutting head 3, which is suitable for high precision and high rigidity requirements.

[0021] A chip removal groove 2 is provided on the outer side of the tool holder 1, and the upper end of the chip removal groove 2 corresponds to the position between the V-shaped surface 303. Two cutting edges 302 are provided on the cutting head 3, and the cutting edges 302 extend continuously from the upper end to the position of the corresponding chip removal groove 2. The upper end of the chip removal groove 2 is aligned with the lower end of the cutting edge 302, and a complete chip removal path is formed by the corresponding cutting edge 302 and chip removal groove 2.

[0022] The pre-tightening assembly includes a retaining ring 8, an L-block 7, a pre-tightening connector 6, and a connecting ring 5. The pre-tightening connector 6 is fixed between the retaining ring 8 and the connecting ring 5. The end of the vertical part of the L-block 7 is fixed to the connecting ring 5. An L-groove 305 is provided on the outer side of the positioning rod 301. The L-groove 305 is in sliding engagement with the L-block 7. The pre-tightening connector 6 is made of spring steel wire in a spiral or wave shape, so that the retaining ring 8 and the connecting ring 5 can be pulled closer together after the pre-tightening connector 6 is stretched. Two mounting grooves 105 with connecting slots 103 are provided downward on the support surface 106. The mounting grooves 105 are used for spring clamps to extend into, so that the retaining ring 8 can be clamped and inserted into the slots 103. The height of the pre-tightening connector 6 is less than the distance from the upper end of the slot 103 to the support surface 106.

[0023] As described above, the positioning rod 301 includes a plane that mates with the connecting ring 5. This plane communicates with the L groove 305. When using the pre-tightening assembly, the connecting ring 5 is first placed on the outside of the positioning rod 301, and the L block 7 is rotated to engage with the retaining ring 8.

[0024] Working principle: After the connecting ring 5 is placed on the outside of the positioning rod 301 and the L block 7 is rotated to engage with the retaining ring 8, the retaining ring 8 is clamped and inserted into the retaining groove 103 using a spring pliers of suitable size. During the process, the cutting head 3 is pulled away from the retaining ring 8. After the retaining ring 8 is inserted into the retaining groove 103, the cutting head 3 is slowly pushed towards the support surface 106. During the process, the positioning rod 301 extends into the positioning hole 102. Under the action of the pre-tightening connector 6, the cutting head 3 is pressed against the support surface 106. At this time, the pre-tightening connector 6 is in a stretched state, that is, the pre-tightening component provides a downward pre-tightening force to the cutting head 3. Finally, the locking bolt 4 is inserted into the connecting hole 304 on one side of the smooth hole 109, and then threadedly connected to the threaded hole 108 to achieve the fixed installation of the cutting head 3 at the V end 101 of the tool holder 1. Example

[0025] refer to Figure 6 This embodiment is based on embodiment one: a groove is provided on the upper side of the connecting ring 5, and a shim 9 is fixedly pasted in the groove. The shim 9 increases the friction between the connecting ring 5 and the mating end face of the positioning rod 301, preventing the L block 7 from hooking the L groove 305 and separating during the use of the tool. After the corresponding slot 103 of the positioning hole 102 of the retaining ring 8 is installed on the positioning rod 301, damping oil is added into the positioning hole 102. In this way, the vibration of the tool during use is converted into heat energy and dissipated under the cooperation of the damping oil and the pre-tightening connector 6, thereby improving the service life of the tool. Example

[0026] refer to Figure 9 The difference between this embodiment and embodiment one is that: a coolant channel 110 is provided in the middle of the tool holder 1 in embodiment one. The coolant channel 110 is connected to an outlet hole 111 on the upper side of the corresponding chip removal groove 2. The coolant channel 110 is used for the cutting fluid to enter, and then the cutting fluid flows out from the outlet hole 111 to cool the cutting head 3 and promote chip removal.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular cutting tool with dual V-clamping and multi-specification adaptability, featuring chip removal and cooling, comprising a tool holder (1) and a cutting head (3), characterized in that: The cutting head (3) is provided with a connecting hole (304), and the lower end of the cutting head (3) is provided with a positioning rod (301). The top of the tool holder (1) includes a V end (101), and the inner side of the V end (101) includes two V-shaped surfaces (303). The V end (101) is fixed to the tool holder (1) and the cutting head (3) by passing the locking bolt (4) through the connecting hole (304). The bottom of the V end (101) is provided with a positioning hole (102), and the lower end of the positioning rod (301) is provided with a pre-tightening component that matches the positioning hole (102).

2. The modular cutting tool with chip removal and cooling that features double V-clamping and multi-specification adaptability according to claim 1, characterized in that: The V-shaped surface (303) is distributed at 180 degrees, and the bottom of the V end (101) includes a support surface (106). The end face of the cutting head (3) connecting the positioning rod (301) is engaged with the support surface (106).

3. A modular cutting tool with chip removal and cooling, featuring double V-clamping and multi-specification adaptability, as described in claim 1 or 2, characterized in that: The outer side of the tool holder (1) is provided with a chip removal groove (2), and the upper end of the chip removal groove (2) corresponds to the position between the V-shaped surface (303).

4. A modular cutting tool with chip removal and cooling and dual V-clamping for multiple specifications as described in claim 3, characterized in that: The cutting head (3) is provided with two cutting edges (302), which extend continuously from the upper end to the position of the corresponding chip removal groove (2), and the upper end of the chip removal groove (2) is aligned with the lower end of the cutting edge (302).

5. A modular cutting tool with chip removal and cooling and dual V-clamping for multiple specifications as described in claim 4, characterized in that: The pre-tightening assembly includes a retaining ring (8), an L-block (7), a pre-tightening connector (6), and a connecting ring (5). The pre-tightening connector (6) is fixed between the retaining ring (8) and the connecting ring (5). The end of the vertical portion of the L-block (7) is fixed to the connecting ring (5).

6. A modular cutting tool with chip removal and cooling and dual V-clamping for multiple specifications as described in claim 5, characterized in that: The positioning rod (301) has an L-groove (305) on its outer side, and the L-groove (305) is engaged with the L-block (7) in a sliding fit.

7. A modular cutting tool with chip removal and cooling and dual V-clamping for multiple specifications as described in claim 6, characterized in that: The upper side of the connecting ring (5) is provided with a groove, and a gasket (9) is fixedly pasted in the groove.

8. A modular cutting tool with chip removal and cooling and dual V-clamping for multiple specifications as described in claim 7, characterized in that: The two parts of the V end (101) are respectively provided with a threaded hole (108) and a smooth hole (109). The locking bolt (4) passes through the smooth hole (109) and is threadedly connected to the threaded hole (108) after passing through the connecting hole (304).

9. A modular cutting tool with chip removal and cooling and dual V-clamping for multiple specifications as described in claim 8, characterized in that: The tool holder (1) is provided with a coolant channel (110) in the middle, and the coolant channel (110) is provided with an outlet hole (111) on one side of the upper end of the corresponding chip removal groove (2).

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