Large metal seat drilling, milling and reaming composite cutter and machining assembly

Abstract

The utility model belongs to the technical field of metal processing, and provides a large metal seat drilling, milling and reaming composite cutter and a processing assembly, the composite cutter sequentially comprises a drill bit, a first milling cutter, a reamer, a second milling cutter and a cutter handle from front to back, the composite cutter is integrally formed, the front four parts are cutting sections, and coatings are arranged on the surfaces of the cutting sections. According to the drilling, milling and reaming integrated composite cutter, various machining operations such as drilling, milling and reaming are completed in one-time cutter replacement, frequent cutter replacement is not needed, the machining requirement is directly completed at a time, the cutter replacement time is shortened, the operation complexity is reduced, the machining efficiency is greatly improved, the machining precision and stability are guaranteed, the production cost is reduced, and the machining quality is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal processing, in particular to a large metal seat drilling, milling and reaming compound cutter and a processing component. Background Art

[0002] In the mechanical manufacturing and machining industries, drilling, milling, and reaming are three common machining methods, each with unique machining characteristics and applicable scenarios. However, in actual production processes, multiple machining operations such as drilling, milling, and reaming often need to be performed alternately on the same workpiece, leading to problems such as low machining efficiency, cumbersome operations, and increased costs.

[0003] For example, in the traditional machining of a large metal seat assembly hole, drilling, milling, and reaming typically require separate tools. First, the drill is used to drill the hole, then the milling cutter is used to expand the hole, and finally, the reamer is used to increase cutting precision. This not only increases tool change and clamping time during the machining process, but can also lead to reduced machining accuracy and damage to the machined surface. Furthermore, differences in tool material and structure can also lead to uneven tool wear and shortened tool life. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a large metal seat drilling, milling and reaming compound tool and processing components, aiming to solve the technical problems of frequent tool changes, low processing efficiency, high cost and other technical problems existing in traditional processing methods, thereby significantly improving processing efficiency and processing quality, and reducing production costs and labor intensity.

[0005] The utility model adopts the following technical solutions:

[0006] On the one hand, the large metal base drilling, milling and reaming compound tool, the compound tool is composed of a drill bit, a first milling cutter, a reamer, a second milling cutter and a shank from front to back. The compound tool is formed in one piece, wherein the first four parts are cutting segments, the surface of the cutting segments is coated, the maximum diameters of the four parts of the cutting segments increase sequentially, the drill bit and the first milling cutter have a stepped transition, and the adjacent blades of the last three parts have a smooth transition.

[0007] Furthermore, the coating is an electroplated 60-mesh corundum coating.

[0008] Furthermore, the helix angle of the composite blade cutting section is 30°.

[0009] Furthermore, an internal cooling channel is provided at the axis of the composite knife.

[0010] Furthermore, the head end of the inner cooling channel is a guide opening with a diameter larger than that of the inner cooling channel.

[0011] On the other hand, the processing component includes the composite knife and a clamping mechanism, the clamping mechanism includes an outer cylinder and an inner core, two layers of sealed bearings are arranged between the lower part of the outer cylinder and the inner core, the space between the two layers of sealed bearings is an annular flow channel, the outer cylinder is also provided with a joint connected to the annular flow channel, an intermediate cavity is opened at the bottom of the inner core, a converging channel is opened between the annular flow channel and the intermediate cavity, the intermediate cavity is connected to a clamp, the handle of the composite knife is installed in the clamp, and the internal cooling channel of the composite knife is connected to the intermediate cavity through the top of the clamp.

[0012] Furthermore, the middle cavity is a prism shape, and the clamp includes a fixing part, the top shape of the fixing part matches the middle cavity, the bottom of the fixing part has a conical cavity, the conical cavity has a matching claw, the bottom surface of the claw is a slope, and a locking nut is screwed into the bottom of the fixing part, and the locking nut has an inclined surface matching the bottom surface of the claw.

[0013] Furthermore, a vertical channel is provided in the center of the fixing piece, a short tube is provided at the bottom of the vertical channel, and the short tube is inserted into the guide port.

[0014] Furthermore, a step is provided in the middle of the fixing member, and a pressing block is fixed to the bottom surface of the inner core by bolts, and the pressing block presses the step.

[0015] The beneficial effects of the utility model are as follows: the composite cutter provided by the utility model is a drilling, milling and reaming integrated cutter, which has the following advantages:

[0016] Firstly, this tool product has a compact structure and high functional integration: drilling, milling and reaming are integrated into the same tool. Through simple operation, different processing methods can be switched, which greatly reduces the tool changing and clamping time.

[0017] Secondly, this tool product can improve processing efficiency and precision: the integrated design ensures that the tool maintains stable performance and precision during high-speed rotation and cutting, thereby improving processing efficiency and quality;

[0018] Third, this tool product has a long life and low wear: by optimizing the tool structure and setting the coating, the risk of wear and damage during use is reduced, thus extending the tool life;

[0019] Fourth, this tool product is easy to operate and maintain: the tool design is simple and quick to operate. At the same time, the maintenance and replacement of the tool are also convenient and quick, reducing labor intensity and costs.

[0020] At the same time, the utility model also provides a processing component, which can be connected to an external coolant. The coolant can be output from the internal cooling channel during processing, which is beneficial to extending the life of the tool and improving the processing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a drilling, milling, and reaming compound cutter provided in an embodiment of the present utility model;

[0022] Figure 2 It is a cross-sectional view of the clamping mechanism provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0025] like Figure 1 As shown, the large metal base drilling, milling and reaming compound tool provided in this embodiment comprises, from front to back, a drill bit 11, a first milling cutter 12, a reamer 13, a second milling cutter 14, and a shank 15. The compound tool is formed in one piece, wherein the first four parts are cutting segments, the surface of the cutting segments is coated, the maximum diameters of the four parts of the cutting segments increase successively, the drill bit and the first milling cutter have a stepped transition, and the adjacent blades of the last three parts have a smooth transition.

[0026] The composite cutter provided in this embodiment is integrally formed and is used for machining assembly holes. The effective cutting section has four parts, namely the drill bit, the first milling cutter, the reamer, and the second milling cutter. For this product, the handle of the composite cutter is The tool features a straight shank. The front end of the drill bit has an R0.5±0.1 radius. This not only meets the requirements for machining blind holes, but also provides an effective guide, ensuring the tool edge precisely enters the machining aperture. The technical requirements for machining holes in large metal seats with this composite tool are that the hole be machined in two sections: the lower section requires reaming to improve accuracy and finish, while the upper section, a composite contour, requires only milling.

[0027] The tool holder is the main part of the tool, which is used to connect to the machine tool or processing equipment to transmit the cutting force. The drill bit is located at the front end of the tool and has a sharp cutting edge, which is used for preliminary drilling and rough machining. The first milling cutter is used to correct drilling deviation and control reaming allowance. The reamer uses the side edge for cutting, which is mainly used to improve the accuracy and finish of the hole. The second milling cutter is used to mill the contour and shape of the upper section. It should be noted that the second milling cutter does not need to enter the lower section to process the reaming.

[0028] In addition, in this composite blade structure, an internal cooling channel 16 is provided through the axis of the composite blade. The tip of the internal cooling channel 6 is a guide opening 17 with a diameter larger than the internal cooling channel. The internal cooling channel is used to provide necessary cooling and lubrication for the tool during the cutting process. Cold water can be used as the coolant. During processing, flushing with water effectively reduces cutting heat and flushes out iron chips generated during the honing process to prevent scratches.

[0029] In this structure, the cutting section of the composite blade is electroplated with a 60-mesh corundum coating, which increases cutting speed, extends service life, and enhances machining precision. The corundum-coated cutting section maintains concentricity of less than 0.005mm with the shank, ensuring runout of less than 0.007mm, thus meeting aperture tolerance requirements. Furthermore, the helix angle of the composite blade's cutting section is 30°, ensuring that cutting fluid, iron shavings, and abrasives are removed via internal flushing.

[0030] This embodiment provides a drilling, milling and reaming compound tool that completes multiple machining operations such as drilling, milling and reaming in one tool change. There is no need to frequently change tools, and the machining requirements can be completed directly in one go, which reduces tool change time and operational complexity, greatly improves machining efficiency, and ensures machining accuracy and stability. During the entire machining process, coolant is continuously supplied through the internal cooling channel to ensure that the tool maintains an appropriate temperature during cutting, extending the tool life to up to 75 meters and improving machining quality. Due to the reduction in tool change time and tool consumption costs, the use of a drilling, milling and reaming compound tool can reduce overall machining costs.

[0031] This embodiment also provides a processing assembly, including the composite knife and a clamping mechanism, such as Figure 2 As shown, the clamping mechanism includes an outer cylinder 2 and an inner core 3, two layers of sealed bearings 4 are arranged between the lower parts of the outer cylinder 2 and the inner core 3, the space between the two layers of sealed bearings 4 is an annular flow channel, the outer cylinder 2 is also provided with a joint 5 connected to the annular flow channel, an intermediate cavity 31 is opened at the bottom of the inner core 3, a converging channel 32 is opened between the annular flow channel and the intermediate cavity 31, the intermediate cavity is connected to a clamp 6, the handle of the composite knife is installed in the clamp 6, and the internal cooling channel of the composite knife is connected to the intermediate cavity through the top of the clamp 6.

[0032] In this structure, the composite blade is installed in the clamp 6, with the outer cylinder fixed and the inner core driven by the drive structure. During use, the connector is connected to the coolant pipe, and the coolant enters the annular flow channel. The annular flow channel has sealed bearings above and below to prevent leakage. The coolant enters the middle cavity from the annular flow channel and the confluence channel, then enters the clamp, flows to the internal cooling channel of the composite blade, and finally the coolant is discharged. Therefore, during the processing, the coolant will be discharged continuously, which can effectively reduce cutting heat and flush out iron chips.

[0033] As a specific installation structure, the middle cavity 31 is a prism-shaped, and the clamp 6 includes a fixing member 61. The top shape of the fixing member 61 matches the middle cavity 31. The bottom of the fixing member 61 has a conical cavity, and a matching claw 62 is located in the conical cavity. The bottom surface of the claw 62 is a slope. A locking nut 63 is also screwed into the bottom of the fixing member 61. The locking nut 63 has an inclined surface that matches the bottom surface of the claw. After the handle of the compound knife is inserted to the highest position, the locking nut is turned, and the locking nut moves upward. Through the cooperation of the slope and the inclined surface, the claw is pushed upward. The claw is conical and contacts the inner wall of the conical cavity. Therefore, during the upward movement of the claw, the claw gradually closes and tightens, thereby completing the locking of the compound knife.

[0034] As shown, the fixing member 61 has a vertical channel 64 at its center. A short tube 65 is located at the bottom of this channel, which is inserted into the guide opening 17. Both the bottom of the short tube and the guide opening are chamfered, ensuring precise insertion of the short tube into the guide opening and matching the calibers of the two when inserting the tool handle. The short tube can also be equipped with a sealing ring to ensure proper operation even in the event of water seepage. Furthermore, when tightening the locking nut, the claws gripping the tool handle also tend to move the handle upward, ensuring a tighter insertion.

[0035] In this structure, the middle of the fixing member 61 has a step 66, and the bottom surface of the inner core 3 is fixed with a pressing block 68 by a bolt 67, and the pressing block 68 presses the step 66. In this way, the clamp can be disassembled for easy replacement and maintenance.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large metal seat drilling, milling and reaming compound cutter, characterized in that: The composite tool comprises a drill bit, a first milling cutter, a reamer, a second milling cutter, and a tool handle from front to back. The composite tool is integrally formed, wherein the first four parts are cutting segments, the surface of the cutting segments is coated, the maximum diameters of the four parts of the cutting segments increase sequentially, the drill bit and the first milling cutter have a stepped transition, and the adjacent blades of the last three parts have a smooth transition.

2. The large metal seat drilling, milling and reaming compound cutter according to claim 1, characterized in that: The coating is an electroplated 60-mesh corundum coating.

3. The large metal seat drilling, milling and reaming compound cutter according to claim 2, characterized in that: The helix angle of the composite knife cutting section is 30°.

4. The large metal seat drilling, milling and reaming compound cutter according to any one of claims 1 to 3, characterized in that: An inner cooling channel is provided at the axis center of the composite knife.

5. The large metal seat drilling, milling and reaming compound cutter as claimed in claim 4, characterized in that: The head end of the inner cooling channel is a guide opening with a diameter larger than that of the inner cooling channel.

6. A processing component, characterized in that The composite knife according to claim 5 also includes a clamping mechanism, wherein the clamping mechanism includes an outer cylinder and an inner core, two layers of sealed bearings are arranged between the lower part of the outer cylinder and the inner core, the space between the two layers of sealed bearings is an annular flow channel, the outer cylinder is also provided with a joint connected to the annular flow channel, an intermediate cavity is opened at the bottom of the inner core, a converging channel is opened between the annular flow channel and the intermediate cavity, the intermediate cavity is connected to a clamp, the handle of the composite knife is installed in the clamp, and the internal cooling channel of the composite knife is connected to the intermediate cavity through the top of the clamp.

7. The processing assembly according to claim 6, characterized in that The middle cavity is a prism shape, and the clamp includes a fixing piece. The top shape of the fixing piece matches the middle cavity. The bottom of the fixing piece has a conical cavity, and a matching claw is provided in the conical cavity. The bottom surface of the claw is a slope. A locking nut is also screwed into the bottom of the fixing piece, and the locking nut has an inclined surface matching the bottom surface of the claw.

8. The processing assembly according to claim 7, wherein: A vertical channel is provided in the center of the fixing piece, a short tube is provided at the bottom of the vertical channel, and the short tube is inserted into the guide port.

9. The processing assembly according to claim 8, characterized in that A step is provided in the middle of the fixing piece, and a pressing block is fixed to the bottom surface of the inner core via bolts, and the pressing block presses the step.

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