High-precision combined boring tool

Abstract

The utility model discloses a high-precision combined type boring cutter, and its technical scheme main points are including cutter shell, the side of cutter shell is provided with the positioning hole, is rotatably arranged with the adjusting disc in the positioning hole, the other end fixed mounting of adjusting disc has the grinding screw rod, the upper end surface of grinding sliding block is provided with the insertion hole, and the precision copper nut is insertedly arranged in the insertion hole. This high-precision combined type boring cutter is fixedly connected through adjusting disc and grinding screw rod, and realizes the thread engagement transmission with the internal thread hole of precision copper nut, can carry out micron accurate position adjustment to boring bar and boring cutter edge, has improved the precision and consistency of boring machining significantly. The adjusting scale line of adjusting disc outer wall surface provides the intuitive position reference for operator, avoids the error of adjustment by experience, and the tight fit of boring bar and boring bar insertion hole guarantees the firm fixation of cutter edge, and it is convenient for quick replacement of boring bar of different specifications, improves the versatility and maintenance efficiency of cutter.

Description

Technical Field

[0001] This utility model relates to the field of machining tools, and in particular to high-precision combined boring tools. Background Technology

[0002] A boring head is a type of machining part, a type of boring tool, most commonly used for internal hole machining and reaming. When machining the internal hole of a workpiece, the boring head requires two processes: rough boring and finish boring. However, sometimes finish boring cannot achieve the required surface roughness, necessitating an additional rolling process. The internal hole machining process requires the use of rough boring tools, finish boring tools, and rollers.

[0003] The existing boring head design suffers from a significant contradiction between customization needs and production efficiency. Because boring heads must be specifically designed and manufactured according to the technical parameters of specific machining processes—including the boring tool diameter, cutting angle, feed rate, and depth of cut—each product, regardless of size or batch, requires a dedicated boring head, resulting in a rigid "one product, one boring head" configuration. While this design ensures machining accuracy and surface quality, it also incurs substantial economic and time costs. Companies must invest heavily in boring head design, development, precision manufacturing, inventory management, and maintenance. This is particularly true for small-batch, multi-variety production models, where boring head manufacturing costs often account for a significant proportion of total production costs. Furthermore, each change in product specifications necessitates the redesign and remanufacturing of the boring head.

[0004] Even though some manufacturers have launched products with interchangeable boring heads, as shown in a patent with publication number CN219632629U, this utility model achieves relative fixation of the insert holder and the insert holder slide by threading a screw through the fixing hole and the limiting mounting hole, making the insert holder detachable and allowing the insert to be replaced without replacing the entire boring head; the insert holder slide is made more stable and secure than existing technology through the cooperation of the mold groove, the limiting step and the limiting side plate.

[0005] The aforementioned solutions reveal fundamental flaws in practical applications, namely structural complexity and cumbersome operation. These interchangeable boring head systems typically employ multi-stage adjustment mechanisms, complex clamping devices, and intricate positioning systems, increasing not only the overall weight and manufacturing cost of the equipment but also significantly raising the skill requirements and training costs for operators. More importantly, the adjustment process for the boring head's machining position is extremely cumbersome, often requiring operators to perform multiple mechanical adjustments.

[0006] Therefore, a high-precision combined boring tool is proposed to solve the above problems. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a high-precision combined boring tool, which has the advantages of precise machining position adjustment, simple overall structure design and easy adjustment and portability, and quick interchangeability of boring tools.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution: High-precision modular boring tool, including tool housing; The bottom of the tool housing is provided with a rectangular groove and a grinding slider is slidably disposed therein. A boring bar insertion hole is provided on one side of the grinding slider and a boring bar is inserted into the boring bar insertion hole. A positioning hole is provided on one side of the tool housing, and an adjustment plate is rotatably installed in the positioning hole. A grinding screw is fixedly installed at the other end of the adjustment plate, and the grinding screw extends into the tool housing and is kept rotatably installed. The upper end face of the grinding slider is provided with a plug hole, and a precision copper nut is inserted into the plug hole; The precision copper nut has an internal threaded hole, and the grinding screw passes through the internal threaded hole and is threadedly engaged with it.

[0009] Furthermore, the outer wall of the adjustment disc is engraved with several adjustment scale lines along its center.

[0010] Furthermore, a tool insertion hole is provided at the center of the outer wall of the adjustment disc.

[0011] Furthermore, a tool holder connecting sleeve is integrally provided at the bottom of the tool housing.

[0012] Furthermore, a boring bar is provided at a section of the boring bar away from the grinding slider, and the boring bar and the boring bar insertion hole maintain a tension fit.

[0013] Furthermore, two slider pressure plates are installed parallel to each other at the bottom of the tool housing. The two slider pressure plates are respectively disposed on both sides of the bottom of the grinding slider. The grinding slider is T-shaped and fits into the sidewalls of the two slider pressure plates.

[0014] In summary, this utility model has the following beneficial effects: This high-precision combined boring tool, with its fixed connection between the adjusting disc and the grinding screw, and the threaded engagement of the precision copper nut's internal thread hole, enables micron-level precise position adjustment of the boring bar and the boring tool edge, significantly improving the accuracy and consistency of boring machining. The adjustment scale lines on the outer wall of the adjusting disc provide the operator with an intuitive position reference, avoiding errors caused by experience-based adjustments. The tool insertion into irregularly shaped holes facilitates precise control using specialized tools, reducing operational difficulty and fatigue. The T-shaped structure of the grinding slider and the interlocking design of the two slider pressure plates effectively eliminate lateral displacement and rotational deviation, ensuring the stability and repeatability of the adjustment process. This precise transmission mechanism allows the tool to adapt to boring machining requirements of different specifications, improving machining quality and efficiency, and is particularly suitable for mass production of parts with extremely high hole diameter accuracy requirements.

[0015] The tightening fit between the boring bar and its socket ensures a secure hold on the cutting edge and facilitates quick replacement of boring bars of different specifications, improving tool versatility and maintenance efficiency. The entire adjustment mechanism is enclosed within the tool housing, effectively preventing the intrusion of cutting fluid and chips, extending the service life of transmission components, and reducing maintenance costs. Compared to traditional boring bar adjustments that require machine shutdown and disassembly, this design enables rapid online adjustment, significantly shortening tool change and adjustment time, improving equipment utilization and production efficiency, while reducing operator skill requirements and the risk of human error. It offers significant economic benefits and has considerable value for widespread application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in this embodiment; Figure 2 This is a schematic diagram of the mounting structure of the adjustment disc on the tool housing in this embodiment; Figure 3 This is a schematic diagram of the overall disassembled structure of the cutting tool in this embodiment; Figure 4 This is a schematic diagram of the insertion and installation structure of the grinding slider and the boring bar in this embodiment.

[0017] In the diagram, 1. Tool housing; 2. Tool holder connecting sleeve; 3. Positioning hole; 4. Adjusting disc; 41. Adjusting scale line; 42. Grinding screw; 5. Tool insertion hole; 6. Slider pressure plate; 7. Grinding slider; 71. Insertion hole; 8. Boring bar insertion hole; 9. Boring bar; 10. Boring tool cutting edge; 11. Precision copper nut; 12. Internal threaded hole. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0020] First embodiment; Reference Figure 1-4 As shown, this is a high-precision combined boring tool in a preferred embodiment of the present invention, including a tool housing 1; The bottom of the tool housing 1 is provided with a rectangular groove and a grinding slider 7 is slidably disposed therein. A boring bar insertion hole 8 is provided on one side of the grinding slider 7 and a boring bar 9 is inserted into the boring bar insertion hole 8. A positioning hole 3 is provided on one side of the tool housing 1. An adjustment plate 4 is rotatably installed in the positioning hole 3. A grinding screw 42 is fixedly installed at the other end of the adjustment plate 4. The grinding screw 42 extends into the tool housing 1 and is kept rotatably installed. The upper end face of the grinding slider 7 is provided with a plug hole 71, and a precision copper nut 11 is inserted into the plug hole 71; The precision copper nut 11 has an internal threaded hole 12, and the grinding screw 42 passes through the internal threaded hole 12 and maintains a threaded engagement connection with it.

[0021] In this embodiment, the high-precision combined boring tool is fixedly connected to the grinding screw 42 through the adjusting plate 4, and achieves threaded engagement transmission with the internal threaded hole 12 of the precision copper nut 11. This enables micron-level precise position adjustment of the boring bar 9 and the boring tool edge 10, significantly improving the accuracy and consistency of boring machining.

[0022] Furthermore, the tightening fit between the boring bar 9 and the boring bar insertion hole 8 ensures a secure fixation of the cutting edge and facilitates quick replacement of boring bars of different specifications, improving tool versatility and maintenance efficiency. The entire adjustment mechanism is enclosed inside the tool housing 1, effectively preventing the intrusion of cutting fluid and chips, extending the service life of transmission components, and reducing maintenance costs.

[0023] Second embodiment; Reference Figure 2-4 As shown, the outer wall of the adjustment disc 4 is engraved with several adjustment scale lines 41 along its center.

[0024] In this embodiment, the adjustment scale 41 allows the operator to intuitively observe and control the rotation angle of the adjustment disc 4. Each scale corresponds to a specific boring bar displacement, avoiding the uncertainty and poor repeatability issues associated with experience-based adjustments. In practical applications, the operator can pre-calculate the required rotation angle according to processing requirements and precisely position it using the scale 41 to achieve rapid and accurate adjustment of the boring diameter. This scale marking system is particularly suitable for batch production scenarios, ensuring the consistency of boring dimensions for parts in the same batch. It also facilitates quality control and the recording and reproduction of process parameters, significantly improving processing efficiency and product quality stability. It is an indispensable design element in modern precision manufacturing.

[0025] Third embodiment; Reference Figure 2-4 As shown, a tool insertion hole 5 is provided at the center of the outer wall of the adjustment disc 4.

[0026] In this embodiment, the irregular design of the tool insertion hole 5 ensures a precise fit between the dedicated adjustment tool and the adjustment disc 4, preventing slippage and positional deviation during the adjustment process. When high-precision adjustment or high-torque operation is required, the operator can apply a more stable torque using the dedicated tool, avoiding adjustment errors caused by hand fatigue or uneven force during manual adjustment.

[0027] Furthermore, the design of the irregular hole 5 improves the safety of the adjustment operation and reduces the risk of direct hand contact with rotating parts. This structure is particularly suitable for automated machining environments and can be used with robotic arms or special fixtures to achieve programmed adjustments, meeting the requirements of modern intelligent manufacturing for rapid tool change and precise positioning, and providing important technical support for improving the automation level and machining consistency of the production line.

[0028] Fourth embodiment; Reference Figure 1-3 As shown, a tool holder connecting sleeve 2 is integrally provided at the bottom of the tool housing 1.

[0029] In this embodiment, the tool holder connecting sleeve 2 adopts an integrated design, which eliminates the assembly gaps and cumulative errors that may occur in traditional split connections, ensuring the stability of the tool under high-speed rotation and large cutting forces. At the same time, the tool holder connecting sleeve 2, which is integrally set at the bottom of the tool housing 1, makes it easy to fix the entire tool to the machine tool holder.

[0030] Fifth embodiment; Reference Figure 1-2 As shown, the boring bar 9 is provided with a boring tool cutting edge 10 at a section away from the grinding slider 7, and the boring bar 9 and the boring bar insertion hole 8 are kept in a tensioned fit.

[0031] In this embodiment, the tension fit design between the boring bar 9 and the boring bar socket 8 adopts the principle of interference or elastic fit, eliminating the radial and axial movement that may occur with traditional clearance fits, and ensuring the positional stability and repeatability of the boring bar 9 under high-speed rotation and cutting loads. This tension fit also facilitates the quick replacement and standardized management of the boring bar 9. Operators can select the appropriate specification of boring bar 9 according to different machining needs, realizing the modular application and economical operation of the tool system.

[0032] Sixth embodiment; Reference Figure 2-3 As shown, two slider pressure plates 6 are installed in parallel at the bottom of the tool housing 1. The two slider pressure plates 6 are respectively set on both sides of the bottom of the grinding slider 7. The grinding slider 7 is T-shaped and fits into the sidewalls of the two slider pressure plates 6.

[0033] In this embodiment, two slider pressure plates 6 are respectively disposed on both sides of the bottom of the grinding slider 7, forming a symmetrical guide constraint structure. This effectively limits the lateral displacement, tilting, and vibration that may occur in the grinding slider 7 during adjustment, ensuring that it slides linearly along a predetermined trajectory. The grinding slider 7 adopts a T-shaped cross-section design and is precisely fitted with the sidewalls of the two slider pressure plates 6. This T-shaped guide rail structure not only increases the contact area and load-bearing capacity but also provides excellent anti-overturning moment and radial stiffness, making it particularly suitable for heavy-duty cutting and high-precision positioning applications.

[0034] Specific implementation process: Step 1: The operator first prepares the main structure of the high-precision combined boring tool, including the tool housing 1, ensuring that the grinding slide block 7 is correctly slidably installed in the rectangular groove at its bottom. A boring bar insertion hole 8 is provided on one side of the grinding slide block 7. The operator inserts the boring bar 9 into this hole 8 and secures it using a tightening fit, ensuring that the boring edge 10 at the end of the boring bar 9 furthest from the grinding slide block 7 is in the appropriate position. Simultaneously, the tool holder connecting sleeve 2 integrally formed at the bottom of the tool housing 1 facilitates fixing the entire tool to the machine tool holder. Two parallel sliding plate pressure plates 6 are located on both sides of the bottom of the grinding slide block 7, fitting into its T-shaped structure to provide initial sliding support, preventing the grinding slide block 7 from shifting during the preparation stage, thus ensuring the stability of the overall structure and ease of installation. Step 2: Next, the operator rotates the adjusting disc 4 through the positioning hole 3 on one side of the tool housing 1. The outer wall of the adjusting disc 4 has several adjustment scale lines 41 engraved along its center, facilitating observation and control of the rotation angle. A grinding screw 42, fixedly mounted at the other end of the adjusting disc 4, extends into the tool housing 1 and remains rotating. When the adjusting disc 4 is rotated, the grinding screw 42 drives a precision copper nut 11. This nut 11 is inserted into the insertion hole 71 on the upper surface of the grinding slider 7 and is threadedly engaged with the grinding screw 42 through its internal threaded hole 12. This transmission mechanism allows the grinding slider 7 to slide precisely within the rectangular groove, pushing the boring bar 9 and its cutting edge 10 to move in the preset direction. The operator can use a special tool with the tool insertion hole 5 at the center of the outer wall of the adjusting disc 4 to assist in rotation, further improving the accuracy and efficiency of the adjustment and avoiding fatigue and errors during manual adjustment. Step 3: Finally, the operator makes fine adjustments using the scale line 41 to ensure the precise positioning of the boring bar 9 and the boring tool edge 10, based on the machining requirements. The entire process relies on the T-shaped engagement of the sliding block 6 with the grinding slide block 7 to prevent lateral wobbling or instability during sliding, thus maintaining high-precision machining. After adjustment, the tool is fixed to the machine tool spindle via the tool holder connecting sleeve 2. When machining begins, the threaded engagement of the grinding screw 42 ensures smooth, backlash-free transmission. The simple overall design makes the adjustment process quick and efficient, avoiding complex disassembly and assembly. This workflow not only achieves real-time control of the boring hole size but also improves the durability and reusability of the tool, making it suitable for various precision machining scenarios, such as the machining of internal holes in automotive parts or molds.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0036] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description in the specification and the accompanying drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

Claims

1. A high-precision combined boring tool, characterized in that: Including the tool housing (1); The bottom of the tool housing (1) is provided with a rectangular groove and a grinding slider (7) is slidably arranged in it. A boring bar insertion hole (8) is provided on one side of the grinding slider (7) and a boring bar (9) is inserted into the boring bar insertion hole (8). A positioning hole (3) is provided on one side of the tool housing (1). An adjustment plate (4) is rotatably installed in the positioning hole (3). A grinding screw (42) is fixedly installed at the other end of the adjustment plate (4). The grinding screw (42) extends into the tool housing (1) and is kept rotatably installed. The upper end face of the grinding slider (7) is provided with a plug hole (71), and a precision copper nut (11) is inserted into the plug hole (71). The precision copper nut (11) has an internal threaded hole (12), and the grinding screw (42) passes through the internal threaded hole (12) and is threadedly engaged with it.

2. The high-precision combined boring tool according to claim 1, characterized in that: The outer wall of the adjustment disc (4) is engraved with several adjustment scale lines (41) along its center.

3. The high-precision combined boring tool according to claim 1, characterized in that: The adjustment disc (4) has a tool insertion hole (5) at the center of its outer wall.

4. The high-precision combined boring tool according to claim 1, characterized in that: The bottom of the tool housing (1) is integrally provided with a tool holder connecting sleeve (2).

5. The high-precision combined boring tool according to claim 1, characterized in that: The boring bar (9) is provided with a boring tool edge (10) on a section away from the grinding slider (7), and the boring bar (9) and the boring bar insertion hole (8) are kept in a tension fit.

6. The high-precision combined boring tool according to claim 1, characterized in that: Two slider plates (6) are installed parallel to each other on the bottom of the tool housing (1). The two slider plates (6) are respectively located on both sides of the bottom of the grinding slider (7). The grinding slider (7) is T-shaped and fits into the sidewalls of the two slider plates (6).

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