A reamer blade positioning device and machine tool apparatus

Abstract

The present application relates to a kind of reamer blade positioning device and machine tool equipment for positioning reamer blade, including body unit, it includes coaxially arranged connecting portion and body;The body is provided with limit block assembly, the limit block assembly includes multiple limit blocks being spaced apart along the circumference of the body;Positioning unit includes multiple positioning blocks that can be detachably installed on body, multiple positioning blocks are spaced apart along the circumference of the body, and the space size adjustable holding space is formed between positioning block and the limit block, to clamp and position the reamer blade;Body is spaced apart along the circumference and is provided with accommodating groove, the positioning block is matched with the accommodating groove.The present application has multiple reamer blade installation station, can realize high-precision positioning, and clamping is not deformed, when blade installation positioning surface wears, it can be quickly replaced, can realize high rigidity locking, to support the production and manufacture demand of high-end precision tool for scale, reliability and consistency.

Description

Technical Field

[0001] This invention relates to the field of reamer cutting technology, and in particular to a reamer cutting positioning device and machine tool. Background Technology

[0002] Guide bar tools are specialized tools used for high-precision hole machining. They provide support and guidance to the tool through a guide bar structure, thereby improving machining stability and accuracy. Guide bar tools are typically suitable for applications with deep holes, large aspect ratios, or strict requirements on cylindricity, coaxiality, and surface roughness. They are used to achieve precision machining of IT6-level holes, including but not limited to engine camshaft holes, crankshaft holes, and precision hydraulic valve core holes. During the machining of these holes, the diameter tolerance must be ≤IT6 (typically 5–8 μm), roundness and cylindricity ≤2 μm, and surface roughness Ra ≤0.2 μm. Strict control must also be maintained over the microscopic texture and residual stress of the hole wall. Therefore, the machining accuracy, cutting edge consistency, and service life of the reamer insert directly determine the machining quality and production cycle of these critical holes. As the core process equipment for reamer insert production and inspection, the reamer insert manufacturing fixture must achieve micron-level (μ-level) positioning of the insert and maintain its position under high-rigidity clamping and repeated clamping. The tooling used for manufacturing reamer inserts must meet micron-level tolerances in terms of flatness, perpendicularity, and runout, while also possessing excellent vibration resistance, thermal stability, and wear resistance to meet the stringent requirements of precision grinding and online inspection. Currently, the industry typically uses specialized tooling with separate clamping structures for precision machining of reamer inserts. Existing specialized tooling only clamps 1-2 inserts at a time for machining, and under conventional precision requirements, this method can still meet the needs of small-batch production.

[0003] However, with the continuous growth in product demand, existing technologies have obvious limitations. First, the number of parts processed at one time is small, resulting in low production efficiency. Individual clamping structures can only process a few inserts per batch, and frequent part changes lead to excessive auxiliary time, making it difficult to meet the needs of rapid batch delivery and creating a production capacity bottleneck. In addition, existing tooling has poor clamping rigidity and insufficient consistency in machining accuracy. It relies solely on bolts to lock the inserts, resulting in uneven distribution of locking force. Under high-frequency grinding forces or cutting vibrations, the inserts are prone to micro-displacement or elastic deformation, leading to excessive cutting edge runout. Existing tooling structures are mostly integral designs, making it difficult to repair locally or replace the reference components after wear, resulting in high overall scrap costs and affecting production continuity. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a reamer blade positioning device and machine tool equipment, which has multiple reamer blade mounting stations, can achieve high-precision positioning, and clamping without deformation. When the blade mounting and positioning surface is worn, it can be quickly replaced, and can achieve high-rigidity locking, thereby supporting the needs of high-end precision cutting tools for large-scale, reliable and consistent production and manufacturing.

[0005] To solve the above-mentioned technical problems, the present invention provides a reamer blade positioning device for positioning a reamer blade, comprising, The main body unit includes a connecting part and a main body arranged coaxially; the main body is provided with a limiting block assembly, the limiting block assembly including a plurality of limiting blocks arranged at intervals along the circumference of the main body; The positioning unit includes a plurality of positioning blocks detachably mounted on the body. The plurality of positioning blocks are spaced apart circumferentially along the body. An adjustable clamping space is formed between the positioning blocks and the limiting block to clamp and position the reamer blade.

[0006] In one embodiment of the present invention, the main body is provided with accommodating grooves spaced apart along the circumferential direction, and the positioning pressure block matches the accommodating groove; the bottom of the accommodating groove is provided with a pressure block mounting hole for mounting the positioning pressure block.

[0007] In one embodiment of the present invention, each positioning block includes a block body and an assembly hole, the assembly hole being formed through the block body; the block body has a contact end face that can abut against the reamer blade; the thickness of the positioning block increases along the extension direction of the assembly hole.

[0008] In one embodiment of the present invention, the body unit further includes a positioning ring, which is coaxial with and detachably connected to the body; the positioning ring limits the position of the reamer blade along the axial direction of the body unit.

[0009] In one embodiment of the present invention, a plurality of connecting through holes are provided at intervals on the body, the connecting through holes extending along the axial direction of the body, and the plurality of connecting through holes are used to install the positioning ring.

[0010] In one embodiment of the present invention, a plurality of the limiting blocks are formed at uniform intervals on the body; the plurality of limiting blocks are concentrically arranged.

[0011] In one embodiment of the present invention, the upper end face of the limiting block along the radial direction of the body is formed with an arc-shaped surface.

[0012] In one embodiment of the present invention, the end of the connecting portion is coaxially provided with a first mounting hole, and the end of the body is coaxially provided with a second mounting hole.

[0013] In one embodiment of the present invention, the connecting part and the body are integrally formed.

[0014] The present invention also provides a machine tool device, including a reamer blade positioning device as described above.

[0015] The technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses a reamer blade positioning device comprising a body unit and a positioning unit. The body unit includes a connecting part and a body, on which multiple limiting blocks are formed. The positioning unit includes multiple positioning pressure blocks. A single positioning pressure block and a single limiting block cooperate to form a clamping space to clamp and position the reamer blade. The reamer blade positioning device of the present invention is made of high-performance medium carbon alloy steel. By optimizing the clamping and positioning structure and the force distribution method, the overall rigidity of the positioning device is effectively improved, and multiple clamping spaces are formed, thereby providing multiple processing stations for clamping reamer blade blanks, effectively reducing the number of clamping operations, improving the processing efficiency of the grinding machine, and meeting the stringent requirements of ultra-precision machining. In addition, the positioning pressure blocks used for positioning the reamer blade can be quickly replaced after wear, facilitating maintenance and replacement. Wear will not affect the overall device, thus eliminating the need for complete scrapping. Operators can quickly replace vulnerable parts, reducing usage and maintenance costs. The reamer blade positioning device of the present invention has a reasonable structure, strong wear resistance, and can maintain high precision and high stability in long-term mass production, while extending its service life. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the reamer blade positioning device according to a preferred embodiment of the present invention.

[0018] Figure 2 This is a side view schematic diagram of the reamer blade positioning device according to a preferred embodiment of the present invention.

[0019] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0020] Figure 4 This is a front view schematic diagram of a reamer blade positioning device according to a preferred embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0022] Explanation of reference numerals on the accompanying drawings: 100. Reamer blade; 1. Body unit; 10. Connecting part; 101. First mounting hole; 102. Second mounting hole; 11. Body; 110. Limiting block; 111. Connecting through hole; 12. Positioning ring; 2. Positioning unit; 20. Positioning block; 200. Block body; 201. Assembly hole. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Example 1

[0024] Reference Figures 1 to 5 As shown, the present invention discloses a reamer blade positioning device for positioning the reamer blade 100 during the production and processing of the reamer blade 100.

[0025] The reamer blade positioning device includes a body unit 1, which includes a connecting part 10 and a body 11 arranged coaxially. The main body 11 is provided with a limiting block assembly, which includes a plurality of limiting blocks 110 spaced apart along the circumference of the main body 11. The reamer blade positioning device further includes a positioning unit 2, which includes a plurality of positioning blocks 20 detachably installed on the body 1, and the plurality of positioning blocks 20 are arranged at intervals along the circumference of the body 1. It should be noted that, along the circumferential direction of the body 11, the multiple positioning blocks 20 are staggered with the limiting blocks 110. It can also be understood that a positioning block 20 is provided between two adjacent limiting blocks 110.

[0026] Each positioning block 20 and each limiting block 110 cooperate to form an adjustable clamping space to clamp and position the reamer blade 100. Thus, multiple clamping spaces are formed on the body 11, enabling the batch clamping of multiple reamer blades 100, thereby realizing the mass production of the reamer blades 100.

[0027] Preferably, the body unit 1 and the positioning unit 2 are made of high-performance medium carbon alloy steel.

[0028] Therefore, it can be seen that the reamer blade positioning device protected by this invention includes a body unit and a positioning unit. The body unit includes a connecting part and a body, and multiple limiting blocks are formed on the body. The positioning unit includes multiple positioning pressure blocks. A single positioning pressure block and a single limiting block cooperate with each other to form a clamping space to clamp and position the reamer blade. The reamer blade positioning device of this invention is made of high-performance medium carbon alloy steel. By optimizing the clamping and positioning structure and the force distribution method, the overall rigidity of the positioning device is effectively improved, and multiple clamping spaces are formed, thereby providing multiple processing stations to clamp the reamer blade blank, effectively reducing the number of clamping operations, improving the processing efficiency of the grinding machine, and meeting the stringent requirements of ultra-precision machining. In addition, the positioning pressure blocks used to position the reamer blade can be quickly replaced after wear, which is convenient for maintenance and replacement. Wear will not affect the overall device, so there is no need to scrap the whole device. Operators can quickly replace the vulnerable parts, reducing the cost of use and maintenance. The reamer blade positioning device of this invention has a reasonable structure, strong wear resistance, and can maintain high precision and high stability in long-term mass production, and can extend its service life.

[0029] In a preferred embodiment, the body 11 is provided with accommodating grooves spaced apart along the circumference. The accommodating grooves are used to assemble the positioning pressure block 20. The bottom of the accommodating groove is provided with a pressure block mounting hole for mounting the positioning pressure block 20. Preferably, the pressure block mounting hole is a threaded hole.

[0030] Preferably, the positioning block 20 is matched with the structure of the receiving groove, so that the positioning block 20 can be tightly embedded in the receiving groove, thereby further improving the positioning stability.

[0031] In a preferred embodiment, each positioning block 20 includes a block body 200 and an assembly hole 201, wherein the assembly hole 201 is formed through the block body 200 and is a threaded hole; the block body 200 has a contact end face that can abut against the reamer blade 100; along the extending direction of the assembly hole 201, the thickness of the positioning block 200 increases, thereby forming a wedge-shaped structure with an arc edge; This configuration enables wedge self-locking and provides stable clamping for the reamer insert 100. The wedge-shaped structure of the positioning block 20, when installed along the mounting hole 201, gradually generates increasing positive pressure between the thickened portion of the block body 200 and the reamer insert 100 and tool body as the fasteners tighten, achieving a wedge-tight fit. Compared to a uniform thickness block, this structure significantly improves clamping stability, preventing the reamer insert 100 from loosening or shifting under cutting forces. It is particularly suitable for the production and processing of reamer inserts 100 under high-precision, high-vibration conditions. Furthermore, it effectively avoids stress concentration and extends service life. Traditional wedge-shaped blocks have sharp edges, which easily lead to stress concentration at these points under stress, causing the block or insert to break. The positioning block 20 uses an arc-shaped edge design (such as a radius or rounded transition), effectively dispersing stress in the contact area, reducing the risk of localized damage to the block body 200 and the reamer insert 100, and increasing the number of reusable parts and overall tool life. Furthermore, the wedge-shaped structure with increasing thickness provides a certain guiding effect when the positioning block 20 is inserted into the receiving groove, reducing assembly difficulty and providing a foolproof effect.

[0032] The positioning block 20 is assembled into the mounting hole of the block by a fastener. In this embodiment, the fastener is a double-ended hexagonal screw; of course, in some other embodiments, the fastener may also be other bolts with the same function.

[0033] Furthermore, the main body unit 1 also includes a positioning ring 12, which is coaxial with and detachably connected to the main body 11. The positioning ring 12 limits the position of the reamer blade 100 along the axial direction of the main body unit 1. This configuration allows the positioning ring 12 to position the end faces of multiple reamer blades 100, ensuring the consistency of their positions along the axial direction of the main body unit 1. The positioning ring 12 enables one-time positioning of all reamer blades 100. Combined with the positioning pressure block 20 and the limiting block 110, it achieves clamping and positioning of the reamer blades 100 in three directions, providing strong support for the stability of the reamer blades 100 during processing. Moreover, the positioning ring 12, as a quick-change structure that is easy to disassemble and assemble, can be replaced individually after wear, eliminating the need to scrap the entire reamer blade positioning device and reducing operating costs. By setting the positioning ring 12, the positional accuracy and positioning precision of the reamer blades 100 can be improved, resulting in higher consistency of the processed reamer blades 100.

[0034] Furthermore, the body 11 is provided with a plurality of connecting through holes 111 spaced apart, and the connecting through holes extend along the axial direction of the body 11; the positioning ring 12 is stably assembled to the plurality of connecting through holes 111 by fastening bolts, thereby achieving stable assembly with the body 11.

[0035] In detail, multiple limiting blocks 110 are evenly spaced on the body 11; at the same time, the multiple limiting blocks 110 are concentrically arranged. Preferably, there are 12 limiting blocks 110, and correspondingly, there are also 12 positioning blocks 20.

[0036] In a preferred embodiment, each of the limiting blocks 110 has an arc-shaped surface formed on its upper end face along the radial direction of the body 11. Specifically, the arc-shaped surface is formed by precision grinding. In this way, the arc-shaped surface can serve as a tool setting mechanism, allowing for quick tool setting during machine debugging, reducing measurement errors, and further improving processing efficiency. By integrating the tool setting function of the limiting blocks 110, the operation of the reamer blade positioning device becomes more convenient and efficient.

[0037] In a preferred embodiment, the end of the connecting part 10 is coaxially provided with a first mounting hole 101, and the end of the body 11 is coaxially provided with a second mounting hole 102; the first mounting hole 101 and the second mounting hole 102 are symmetrical to each other along the axial direction of the body unit 1; the reamer positioning device can be assembled on the machine tool through the first mounting hole 101 and the second mounting hole 102, thereby ensuring the stability and motion consistency of the reamer 100 during the machining process.

[0038] Preferably, the connecting part 10 and the body 11 are integrally formed.

[0039] The manufacturing process of the reamer blade positioning device is as follows: The body unit 1 is made of 42CrMoS4 medium carbon steel, and is manufactured through forging, quenching and tempering, rough machining, isothermal quenching, low-temperature tempering, and finish machining. The hardness of the body unit 1 reaches 48-52 HRC, ensuring high rigidity, low deformation, and high wear resistance.

[0040] The positioning block 20 is made of 42CrMoS4 medium carbon steel with a hardness of 30-35HRC.

[0041] The first mounting hole 101, the second mounting hole 102, the outer circle of the tool setting ring (the arc-shaped upper end face of the limiting block 110), and the positioning ring 12 located in the main body unit 1 are all formed by grinding. Among them, the coaxiality of the first mounting hole 101 and the second mounting hole 102 is ≤0.001mm; the runout of the outer circle of the tool ring (the arc-shaped upper end face of the limiting block 110) is ≤0.001mm; The reamer holder space (receiving groove) is manufactured using a high-precision five-axis machining center with a positional accuracy of ±0.01mm. Example 2

[0042] The present invention also discloses a machine tool device, including a reamer blade positioning device as described above.

[0043] Therefore, through the multiple reamer blade installation stations of the aforementioned reamer blade positioning device, in conjunction with the positioning blocks, high-precision positioning can be achieved, with tight clamping and no deformation. After local structural wear occurs, replacement and maintenance can be carried out quickly without scrapping the entire structure. At the same time, it has excellent rigidity, which facilitates quick tool setting. Thus, during the processing of reamer blades, the long-term stability and processing consistency are improved, and a batch of reamer blades can be produced with a single machine adjustment. The detachable positioning ring ensures the installation consistency of the reamer blade end face, and this reference surface can be replaced after wear, thereby improving the manufacturing accuracy of the reamer blades.

[0044] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A reamer blade positioning device, characterized in that: For positioning reamer blades, including The main body unit includes a connecting part and a main body arranged coaxially; the main body is provided with a limiting block assembly, the limiting block assembly including a plurality of limiting blocks arranged at intervals along the circumference of the main body; The positioning unit includes a plurality of positioning blocks detachably mounted on the body. The plurality of positioning blocks are spaced apart circumferentially along the body. An adjustable clamping space is formed between the positioning blocks and the limiting block to clamp and position the reamer blade.

2. The reamer blade positioning device according to claim 1, characterized in that: The main body is provided with accommodating grooves spaced apart along the circumference, and the positioning pressure block matches the accommodating groove; the bottom of the accommodating groove is provided with a pressure block mounting hole for installing the positioning pressure block.

3. The reamer blade positioning device according to claim 1, characterized in that: Each of the positioning blocks includes a block body and an assembly hole, the assembly hole being formed through the block body; the block body has a contact end face that can abut against the reamer blade; the thickness of the positioning block increases along the extension direction of the assembly hole.

4. A reamer blade positioning device according to claim 1, characterized in that: The body unit further includes a positioning ring, which is coaxial with the body and detachably connected; the positioning ring limits the position of the reamer blade along the axial direction of the body unit.

5. A reamer blade positioning device according to claim 4, characterized in that: The main body is provided with a plurality of connecting through holes at intervals, the connecting through holes extending along the axial direction of the main body, and the plurality of connecting through holes are used to install the positioning ring.

6. A reamer blade positioning device according to claim 1, characterized in that: The plurality of limiting blocks are evenly spaced on the body; the plurality of limiting blocks are concentrically arranged.

7. A reamer blade positioning device according to claim 1, characterized in that: The limiting block has an arc-shaped surface on its upper end face along the radial direction of the body.

8. A reamer blade positioning device according to claim 1, characterized in that: The end of the connecting part is coaxially provided with a first mounting hole, and the end of the main body is coaxially provided with a second mounting hole.

9. A reamer blade positioning device according to any one of claims 1-8, characterized in that: The connecting part and the body are integrally formed.

10. A machine tool device, characterized in that: Includes a reamer blade positioning device as described in any one of claims 1-9.

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