A reamer
By using a reaming boring tool with high-strength alloy materials and a mirrored spiral groove design, combined with carbide inserts and cooling components, the problems of easy deformation, unreasonable chip removal groove design, and inaccurate cooling of existing reaming boring tools under high-speed cutting and heavy loads have been solved, achieving high-precision, high-efficiency, and long-life reaming machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MOOG PRECISION TOOLS (HANGZHOU) CO LTD
- Filing Date
- 2025-09-15
- Publication Date
- 2026-08-04
AI Technical Summary
Existing reamers and boring tools are prone to deformation under high-speed cutting or heavy loads. The chip removal groove design is unreasonable, leading to chip accumulation or vibration due to force imbalance. The tool mounting groove has poor adaptability, the bolt connection strength is insufficient and disassembly and assembly are inconvenient, and the cooling structure cannot cool accurately or lacks flow regulation function, resulting in low machining accuracy and efficiency, making it difficult to meet the machining requirements of high precision, high efficiency and long service life.
The reamer bar is made of high-strength alloy material and features a mirrored spiral groove and boring tool mounting groove. Combined with carbide inserts and custom connecting screw holes, it achieves tight insertion and easy disassembly of the inserts. The cooling components include a cold water spray hole and a liquid inlet channel. The coolant flow rate can be flexibly adjusted through the adjustment hole and adjustment screw to ensure that the coolant is accurately sprayed onto the cutting area.
It improves machining stability and precision, reduces vibration and thermal deformation, extends tool life, enhances machining efficiency and workpiece surface quality, and meets the needs of machining multiple materials.
Smart Images
Figure CN224587013U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hole reaming and boring tools, and in particular to a hole reaming and boring tool. Background Technology
[0002] In the field of machining, hole reaming is a key process before the finishing of a workpiece. Its machining accuracy and efficiency directly affect the quality of subsequent processes and the overall production progress, and the reaming boring tool is the core machining tool.
[0003] As the manufacturing industry develops towards high-precision, high-speed, and multi-material processing, the performance of reaming boring tools plays a decisive role in the processing effect.
[0004] While existing reaming boring tools achieve hole enlargement in workpieces, their design suffers from several drawbacks. Traditional reaming boring tools often use ordinary steel for their tool holders, which are prone to structural deformation under high-speed cutting or heavy-load machining conditions. Furthermore, the chip removal grooves on the outer surface of the tool holder are poorly designed. This can lead to either narrow chip removal channels causing chip accumulation and blockage, affecting machining efficiency and workpiece surface roughness, or uneven distribution of the chip removal grooves causing force imbalance during tool holder rotation, resulting in severe vibration and reduced machining accuracy. Regarding insert assembly and use, existing boring tools typically use standard-sized insert mounting slots, resulting in poor compatibility with the inserts and large clearances. The bolt connections used to fix the inserts are also weak and have limited space for disassembly and assembly. This not only causes the inserts to loosen and shift during cutting, affecting positional accuracy, but also makes insert replacement and maintenance cumbersome and time-consuming. Additionally, the limited selection of insert materials restricts wear resistance and durability. Due to their poor high-temperature performance, existing reamers suffer from rapid wear and short service life when machining difficult-to-machine materials such as stainless steel and high-strength alloys. Frequent replacements further increase production costs. In addition, the cooling problem of the cutting area also needs to be solved. The cooling structure of traditional reamers is mostly external spray type, which makes it difficult to accurately deliver coolant to the cutting edge area. The cooling range is scattered and the efficiency is low, which cannot effectively reduce the cutting temperature. This leads to accelerated wear of the cutting tool due to high temperature. At the same time, the workpiece is prone to thermal deformation, affecting dimensional accuracy. Some reamers with internal cooling channels lack flexible flow adjustment function and cannot adapt the cooling intensity according to different workpiece materials and machining parameters, resulting in poor applicability. As a result, existing reamers have obvious shortcomings in terms of structural stability, chip removal efficiency, cutting tool assembly and maintenance, and cooling effect, making it difficult to meet the machining requirements of high precision, high efficiency, and long service life. Therefore, a new reamer is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a reaming boring tool, aiming to solve the problems in the prior art. These problems include: the tool holder of the reaming boring tool is made of ordinary steel, which makes it prone to deformation under high speed and heavy load; the chip removal groove design is unreasonable, causing chip accumulation or vibration due to force imbalance; the insert mounting groove has poor adaptability; the bolt connection strength is insufficient and the disassembly and assembly are inconvenient, resulting in easy loosening of the insert and long replacement time; the single insert material makes it wear out quickly and have a short life when machining difficult-to-cut materials; the cooling structure either cannot accurately cool the cutting zone or lacks flow regulation function, which leads to accelerated insert wear and thermal deformation of the workpiece. As a result, there are shortcomings in structural stability, chip removal efficiency, insert assembly and maintenance, and cooling effect, making it difficult to meet the requirements of high precision, high efficiency and long life machining.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hole-reaming boring tool, including a hole-reaming tool bar, wherein a spiral groove is formed on the outer surface of the hole-reaming tool bar, and a blade assembly and a cooling assembly are provided between the hole-reaming tool bar and the spiral groove; The blade assembly includes a boring bar mounting groove, which is formed on the inner wall of the spiral groove. A connecting screw hole is formed on the inner wall of the boring bar mounting groove. A blade is fitted inside the boring bar mounting groove, and an assembly bolt is threaded between the blade and the connecting screw hole.
[0007] As a further description of the above technical solution: The spiral groove is provided in two parts, and the two spiral grooves are mirror images of each other along the central axis of the reaming tool bar.
[0008] As a further description of the above technical solution: A disassembly clearance groove is provided on one side of the inner wall of the boring tool mounting groove.
[0009] As a further description of the above technical solution: The outer wall of the blade is adapted to the inner wall size of the boring tool mounting groove.
[0010] As a further description of the above technical solution: The cooling assembly includes a cold water spray hole and a liquid inlet channel. The cold water spray hole is located on the inner wall of the spiral groove and is positioned on the side near the boring tool mounting groove. The liquid inlet channel is located inside the mounting end of the reamer.
[0011] As a further description of the above technical solution: An adjustment hole is provided on the outer surface of the reaming tool rod that runs through the outer side of the liquid inlet channel.
[0012] As a further description of the above technical solution: The adjustment hole is provided in two parts, which are mirror images of each other along the central axis of the liquid inlet channel, and both adjustment holes are threaded with adjustment screws inside.
[0013] As a further description of the above technical solution: A liquid supply inner hole is connected through the interior of the regulating hole and the cold water spray hole.
[0014] This utility model has the following beneficial effects: 1. In this utility model, the blade assembly assembly utilizes a customized boring bar mounting slot, high-precision connecting screw holes, and internal hexagonal mounting bolts to achieve tight and secure blade fixation without loosening, thereby improving cutting stability and positional accuracy. The disassembly and assembly clearance groove and carbide blade enable convenient blade disassembly and assembly and extend blade life. At the same time, the high-strength alloy reaming tool holder and mirrored spiral grooves ensure structural stability and uniform force distribution under high speed and high load, reducing vibration and inertial forces, ensuring machining accuracy, meeting the requirements of multi-material machining, and ultimately improving machining efficiency and workpiece surface quality.
[0015] 2. In this utility model, the coolant is delivered through the inlet channel and the inner hole of the coolant supply via the cooling component. It is then precisely sprayed onto the cutting zone through the cold water spray hole to cool the blade and workpiece and wash away the chips, thereby reducing blade wear and workpiece thermal deformation. With the help of the adjustment hole and adjustment screw, the flow rate can be flexibly adjusted to adapt to different working conditions, improve the cooling targeting and stability, thereby improving the machining quality and extending the service life of the blade. Attached Figure Description
[0016] Figure 1 This is a three-dimensional front view of a hole-reaming boring tool proposed in this utility model; Figure 2 This is a three-dimensional side view of a hole-reaming boring tool proposed in this utility model; Figure 3 This is a schematic diagram showing the disassembled structure of the reaming tool holder and the cutting tool assembly of a reaming boring tool proposed in this utility model. Figure 4 This is a partial internal structural diagram of the cooling assembly in the cross-section of the reaming tool shank of a reaming boring tool proposed in this utility model.
[0017] Legend: 1. Reamer bar; 2. Spiral groove; 3. Blade assembly; 31. Boring tool mounting slot; 32. Connecting screw hole; 33. Blade; 34. Assembly bolt; 4. Cooling assembly; 41. Cold water spray hole; 42. Liquid inlet channel; 43. Adjustment hole; 44. Liquid supply inner hole; 45. Adjustment screw. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Reference Figures 1-3This utility model provides an embodiment of a reaming boring tool, including a reaming bar 1. The reaming bar 1, as the core support component of the boring tool, is made of high-strength alloy material, ensuring structural stability under high-speed cutting and heavy load conditions, preventing deformation that could affect machining accuracy. The outer surface of the reaming bar 1 has two spiral grooves 2. The design of the spiral grooves 2 not only provides an effective discharge channel for chips generated during cutting, preventing chip accumulation and blockage that could affect machining efficiency and surface quality, but also reduces the overall weight of the reaming bar 1 to a certain extent, lowering the inertial force during machining. Furthermore, the two spiral grooves 2 are mirror-image arranged along the central axis of the reaming bar 1. The two spiral grooves 2 allow the reamer 1 to be subjected to more uniform force during rotary machining, reducing vibration caused by unbalanced force and further improving machining stability and accuracy. A cutting tool assembly 3 is provided between the reamer 1 and the spiral grooves 2. The cutting tool assembly 3 is a key structure for realizing the reaming cutting function, used to stably install the cutting tool 33 and ensure its precise positioning during cutting. The cutting tool assembly 3 includes a boring tool mounting groove 31, the shape and size of which are customized according to the structural parameters of the cutting tool 33, ensuring a tight fit between the cutting tool 33 and the groove wall after installation, preventing loosening. The boring tool mounting groove 31 is located on the inner wall of the spiral groove 2. The inner wall of the boring bar mounting slot 31 fully utilizes the space of the spiral groove 2, while bringing the cutting position of the insert 33 closer to the workpiece surface, reducing the cutting lever arm and improving cutting stability. The inner wall of the boring bar mounting slot 31 has a connecting screw hole 32. The internal thread precision of the connecting screw hole 32 is strictly controlled to ensure sufficient connection strength when mated with the mounting bolt 34, preventing the insert 33 from falling off due to bolt loosening. A disassembly clearance groove is provided on one side of the inner wall of the boring bar mounting slot 31, providing operating space for the installation and removal of the insert 33, facilitating the replacement or maintenance of the insert 33 by operators using tools, and improving disassembly and assembly efficiency. The insert 33 is fitted tightly inside the boring bar mounting slot 31. 3. Made of cemented carbide, it has high hardness, high wear resistance and high temperature resistance, which can meet the hole enlargement processing needs of workpieces of different materials and extend service life. The outer wall of the insert 33 is adapted to the inner wall of the boring bar mounting groove 31. The size adaptation ensures that the insert 33 has no wobble gap in the mounting groove, ensuring the positional accuracy during cutting, thereby improving the machining dimensional accuracy and surface roughness of the workpiece. The insert 33 is threadedly connected to the connecting screw hole 32 by a mounting bolt 34. The mounting bolt 34 is made of high-strength stainless steel. The threaded connection firmly locks the insert 33 in the boring bar mounting groove 31. At the same time, its head is designed with an internal hexagonal structure, which is convenient for tightening and disassembly operations using special tools.
[0020] Reference Figure 1 , Figure 2 and Figure 4A cooling assembly 4 is installed between the reaming tool holder 1 and the spiral groove 2. The main function of the cooling assembly 4 is to spray coolant into the cutting area during the reaming process, thereby cooling the cutting part of the tool 33 and the workpiece, and simultaneously flushing away chips, further improving the machining quality and the service life of the tool 33. The cooling assembly 4 includes a cold water spray hole 41 and a liquid inlet channel 42. The cold water spray hole 41 is responsible for accurately spraying the coolant into the cutting area, while the liquid inlet channel 42 is used to transport external coolant to the cold water spray hole 41. The two work together to form a complete coolant delivery path. The cold water spray hole 41 is located inside the spiral groove 2. The wall is reinforced, and the cold water spray hole 41 is located on the side close to the boring bar mounting groove 31. This allows the coolant to directly act on the cutting edge of the insert 33 and the workpiece surface, maximizing the cooling effect and preventing excessive wear of the insert 33 or thermal deformation of the workpiece surface due to excessive cutting temperature. The liquid inlet channel 42 is located inside the mounting end of the reamer 1. This conceals the coolant delivery path within the reamer 1, avoiding external interference and facilitating connection to an external cooling system to ensure a stable coolant supply. Qualitatively, an adjustment hole 43 is provided on the outer surface of the inlet channel 42, penetrating the outer surface of the reaming tool 1. The adjustment hole 43 is used to install the adjustment screw 45. The tightness of the adjustment screw 45 can control the flow rate of the coolant in the inner hole 44, meeting the cooling intensity requirements under different processing conditions. There are two adjustment holes 43, which are mirrored along the central axis of the inlet channel 42. The two mirrored adjustment holes 43 can respectively control the flow rate of the cold water spray holes 41 in different areas, making the adjustment of the cooling system more flexible. It can accurately adjust the cooling range and intensity according to the actual processing conditions, and the two adjustment holes 43 can control the flow rate of the cold water spray holes 41 in different areas. Each of the adjustment holes 43 is internally threaded with an adjusting screw 45. The threads of the adjusting screw 45 have a high degree of matching with the internal threads of the adjusting hole 43, allowing for fine-tuning of the flow rate during rotation. At the same time, the threaded connection has good sealing performance, preventing coolant leakage from the adjusting hole 43. A liquid supply inner hole 44 is connected between the adjusting hole 43 and the internal cold water spray hole 41. The diameter of the liquid supply inner hole 44 is determined by calculation to ensure that the coolant has sufficient pressure and flow rate during transportation, allowing it to be smoothly sprayed out from the cold water spray hole 41. Furthermore, its inner wall is smoothed to reduce coolant flow resistance and prevent impurities from clogging the channel.
[0021] Working principle: When this reaming boring tool is working, the reaming tool holder 1, as the core support component, drives the whole rotation. The high-strength alloy material used in it ensures stability under high-speed cutting and heavy load conditions. The two spiral grooves 2, which are mirrored along the central axis, make the tool holder evenly stressed during rotation, reduce vibration, and provide a channel for chip discharge to avoid accumulation and affect processing. In the insert assembly 3, the boring tool mounting groove 31 of the customized size fits tightly with the insert 33. The mounting bolt 34 locks the insert 33 firmly through the connecting screw hole 32 to ensure no shaking during cutting. The disassembly and assembly clearance groove facilitates the replacement and maintenance of the insert 33. During the cutting process, the cooling component 4 works synchronously: external coolant is delivered through the inlet channel 42 inside the mounting end of the reamer 1, and reaches the cold water spray hole 41 through the inner supply hole 44. The adjusting screws 45 in the two mirror-shaped adjusting holes 43 can finely adjust the flow rate according to the processing requirements, so that the coolant is accurately sprayed to the cutting area near the boring bar mounting groove 31, thereby cooling the cutting tool 33 and the workpiece, and washing away the chips. Finally, the reaming process is completed efficiently and with high precision under the synergistic action of all components.
[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A reaming boring tool, comprising a reaming tool holder (1), characterized in that: The outer surface of the reaming tool bar (1) is provided with a spiral groove (2), and a blade assembly (3) and a cooling assembly (4) are provided between the reaming tool bar (1) and the spiral groove (2). The blade assembly (3) includes a boring bar mounting groove (31), which is located on the inner wall of the spiral groove (2). A connecting screw hole (32) is provided on the inner wall of the boring bar mounting groove (31). A blade (33) is fitted inside the boring bar mounting groove (31), and an assembly bolt (34) is threaded between the blade (33) and the connecting screw hole (32).
2. A reaming tool according to claim 1, characterised in that: The spiral groove (2) is provided in two parts, and the two spiral grooves (2) are mirrored along the central axis of the reaming tool bar (1).
3. A reaming tool according to claim 1, wherein: A disassembly clearance groove is provided on one side of the inner wall of the boring tool mounting groove (31).
4. A reaming tool according to claim 1, wherein: The outer wall of the blade (33) is adapted to the inner wall size of the boring tool mounting groove (31).
5. A reaming tool according to claim 1, wherein: The cooling assembly (4) includes a cold water spray hole (41) and a liquid inlet channel (42). The cold water spray hole (41) is opened on the inner wall of the spiral groove (2) and is located on the side near the boring tool mounting groove (31). The liquid inlet channel (42) is opened inside the mounting end of the reaming tool bar (1).
6. A reaming tool according to claim 5, wherein: An adjustment hole (43) is provided on the outer surface of the reaming tool bar (1) through the liquid inlet channel (42).
7. A reaming tool according to claim 6, wherein: The adjustment hole (43) is provided in two parts. The two adjustment holes (43) are mirrored along the central axis of the liquid inlet channel (42), and the interior of the two adjustment holes (43) is threaded with adjustment screws (45).
8. A reaming tool according to claim 7, wherein: The regulating hole (43) and the cold water spray hole (41) are connected by a liquid supply inner hole (44).