Machining tool assembly

Abstract

This application relates to the field of cutting tool technology, specifically disclosing a machining tool assembly for deep hole machining on the arc surface of a workpiece. The workpiece has a centering hole penetrating the arc surface and an auxiliary surface opposite to the arc surface. The machining tool assembly includes a centering end mill, which comprises a tool holder, an extension rod, a milling rod, and a centering rod arranged sequentially and coaxially connected. The diameter of the centering rod is smaller than the diameter of the milling rod. In this machining tool assembly, the centering rod of the centering end mill is inserted into the centering hole. The centering rod and the centering hole cooperate to ensure the stable rotation of the centering end mill, preventing the machining center position of the centering end mill from shifting and ensuring machining quality. Because the centering end mill can rotate stably, the risk of breakage due to vibration stress concentration is reduced, increasing the service life of the centering end mill and reducing machining costs. The centering end mill has the dual functions of centering and deep hole machining, and can also be applied to other deep hole machining applications.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and specifically to a machining tool assembly. Background Technology

[0002] In deep hole machining, it is often necessary to machine deep holes on the arc surfaces of workpieces. Currently, end mills are commonly used for deep hole machining on these surfaces. However, due to the spatial constraints at the root of the step on the arc surface, the end mill shank is prone to interference with the root of the step when machining deep holes on this surface. Increasing the overhang length of the shank to avoid interference reduces the rigidity of the end mill, leading to machining vibration. This vibration can cause the machining center to shift, affecting machining quality. Furthermore, the risk of the end mill breaking due to stress concentration from vibration also increases significantly, resulting in higher machining costs. Utility Model Content

[0003] In view of the above, it is necessary to propose a machining tool assembly to realize deep hole machining on the arc surface of the workpiece, ensure machining quality, and reduce machining costs.

[0004] This application provides a machining tool assembly for deep hole machining on the arc surface of a workpiece. The workpiece has a centering hole penetrating the arc surface and an auxiliary surface disposed opposite to the arc surface. The machining tool assembly includes a centering milling cutter, which includes a tool holder, an extension rod, a milling rod, and a centering rod arranged sequentially and coaxially connected. The diameter of the centering rod is smaller than the diameter of the milling rod.

[0005] When machining deep holes on the arc surface of a workpiece using the aforementioned machining tool assembly, the centering cutter is first fed at a low speed, allowing the centering rod to slowly enter the centering hole on the arc surface side. Once the centering rod is fully inside the centering hole, the speed of the centering cutter is increased, causing the milling rod to gradually drill into the centering hole to form the desired deep hole. During this process, the centering rod does not leave the arc surface each time the centering cutter is lifted, ensuring that the machining center position of the centering cutter does not shift. In this way, deep hole machining on the arc surface of the workpiece is achieved. In this embodiment of the machining tool assembly, the centering rod of the centering cutter is inserted into the centering hole, and the centering rod and centering hole cooperate to ensure stable rotation of the centering cutter, preventing shift in the machining center position and thus ensuring machining quality. Because the centering cutter can rotate stably, the risk of breakage due to vibration stress concentration is reduced, extending the service life of the centering cutter and thereby reducing machining costs. Furthermore, the centering end mill of the machining tool assembly in this application embodiment has the dual functions of centering and machining deep holes, which not only helps to ensure machining quality and reduce machining costs, but can also be extended to other deep hole machining scenarios.

[0006] In some embodiments, the milling bar includes a plurality of helically arranged cutting edges, with chip removal grooves formed between adjacent cutting edges.

[0007] The aforementioned machining tool assembly, by defining the milling bar including the cutting edge, enables the milling bar to perform the function of drilling and centering holes; by setting the milling bar including the chip removal groove, the chips generated during machining are discharged through the chip removal groove, ensuring the smooth progress of deep hole machining.

[0008] In some embodiments, the centering rod has a plurality of cutting edges evenly distributed on its end face away from the milling rod.

[0009] The aforementioned machining tool assembly, by uniformly setting a number of cutting edges on the end face of the centering rod of the centering cutter, enables the end face of the centering cutter to be milled, which helps to improve the application range of the centering cutter.

[0010] In some embodiments, the machining tool assembly further includes a drilling cutter, which is disposed corresponding to the centering milling cutter. The drilling cutter is used to machine the centering hole extending from the auxiliary surface to the arc surface. The diameter of the drilling cutter is larger than the diameter of the centering rod and smaller than the diameter of the milling rod.

[0011] The aforementioned machining tool assembly, by providing the aforementioned drilling cutter, facilitates the machining of a centering hole from the auxiliary surface side of the workpiece; by limiting the diameter of the drilling cutter to be greater than the diameter of the centering rod and less than the diameter of the milling rod, it facilitates the insertion of the centering rod into the centering hole, while also facilitating the milling rod to perform deep hole machining to produce the required deep hole size.

[0012] In some embodiments, the diameter of the handle is larger than the diameter of the extension rod, and the end of the handle connected to the extension rod is configured as a frustum-shaped structure, the diameter of which gradually decreases from the end away from the extension rod to the end closer to the extension rod.

[0013] The aforementioned machining tool assembly, by limiting the diameter of the tool holder to be larger than the diameter of the extension rod, facilitates the external machine tool to fix the centering end mill by clamping and fixing the tool holder, thus ensuring the stability of the centering end mill during rotation; by limiting the aforementioned frustum-shaped structure, the connection strength between the tool holder and the extension rod is enhanced.

[0014] In some embodiments, the diameter of the milling rod ranges from 0.8 mm to 1.2 mm.

[0015] The aforementioned machining tool assembly limits the diameter range of the milling bar to facilitate the milling bar in machining the required deep hole size.

[0016] In some embodiments, the diameter of the centering rod ranges from 0.6 mm to 0.8 mm.

[0017] The aforementioned machining tool assembly, by limiting the diameter range of the centering rod, reasonably sets the diameter range of the centering rod so that the centering rod can be smoothly inserted into the centering hole.

[0018] In some embodiments, the difference between the diameter of the centering hole and the diameter of the centering rod is in the range of 0.01 mm to 0.03 mm.

[0019] The aforementioned machining tool assembly, by limiting the range of the difference between the diameter of the centering hole and the diameter of the centering rod, firstly ensures that the centering rod can be smoothly inserted into the centering hole, and secondly prevents the centering rod from shifting and vibrating within the centering hole.

[0020] In some embodiments, the diameter of the extension rod is larger than the diameter of the milling rod.

[0021] The aforementioned machining tool assembly, by limiting the diameter of the extension rod to be larger than that of the milling rod, can reasonably distinguish between the extension rod and the milling rod, and at the same time helps to improve the structural strength of the centering end mill.

[0022] In some embodiments, the tool holder, the extension rod, the milling rod, and the centering rod are integrally formed.

[0023] The aforementioned machining tool assembly, by defining the tool holder, extension rod, milling rod, and centering rod as an integrally formed structure, ensures the structural strength of the centering end mill. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the machining tool assembly provided in the embodiments of this application.

[0025] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the machining tool assembly machining the workpiece.

[0026] Figure 3 This is a schematic diagram of another centering end mill provided in the embodiments of this application.

[0027] Explanation of main component symbols: Machining tool assembly 1, centering milling cutter 100, 300, tool holder 10, frustum-shaped structure 12, extension rod 20, milling rod 30, cutting edge 32, chip groove 34, centering rod 40, cutting edge 50, drilling tool 200, workpiece 2, arc surface 202, auxiliary surface 204, centering hole 206. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0029] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, 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. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0032] Please see Figure 1 This application provides a machining tool assembly 1. Please refer to [reference needed]. Figure 2 The machining tool assembly 1 is used to perform deep hole machining on the arc surface 202 of the workpiece 2. In this embodiment, the workpiece 2 has a centering hole 206 penetrating the arc surface 202 and an auxiliary surface 204 disposed opposite to the arc surface 202. The diameter of the centering hole 206 is smaller than the diameter of the deep hole machined on the arc surface 202 of the workpiece 2, and the length of the deep hole is smaller than the length of the centering hole 206. In this embodiment, the auxiliary surface 204 can be a plane. It is understood that in other embodiments, the auxiliary surface 204 can also be a curved surface or other shaped surface.

[0033] The machining tool assembly 1 includes a centering end mill 100. The centering end mill 100 is inserted into a centering hole 206 from the arc surface 202 and partially machines the centering hole 206 into the desired deep hole using a pecking drill motion. The centering end mill 100 has the dual functions of centering and deep hole machining. Understandably, the pecking drill motion is a segmented feed cutting method, where the centering end mill 100 rotates to feed a certain depth, then briefly retracts to discharge chips and cool, before feeding again, repeating this cycle until the deep hole machining is complete. By limiting the centering end mill 100 to pecking drill motion for deep hole machining, firstly, it avoids chip accumulation that could cause the centering end mill 100 to jam or scratch the hole wall; secondly, intermittent cutting reduces heat accumulation and extends the service life of the centering end mill 100; and thirdly, segmented cutting reduces radial force and lowers the cutting load.

[0034] The centering end mill 100 includes a tool holder 10, an extension rod 20, a milling rod 30, and a centering rod 40, which are arranged sequentially and coaxially connected. The diameter of the centering rod 40 is smaller than the diameter of the milling rod 30. The tool holder 10, extension rod 20, milling rod 30, and centering rod 40 are integrally formed. By limiting the integral formation of the tool holder 10, extension rod 20, milling rod 30, and centering rod 40, the structural strength of the centering end mill 100 is ensured. In use, the centering end mill 100 is clamped by an external machine tool (not shown) to drive the centering end mill 100 to move and rotate. It is understood that in other embodiments, the tool holder 10, extension rod 20, milling rod 30, and centering rod 40 can also be connected by welding, pin connection, or other methods. When the tool holder 10, extension rod 20, milling rod 30 and centering rod 40 are detachably connected, the centering rod 40, milling rod 30, etc. can be replaced according to the actual situation. The specific settings can be set according to the actual situation, and this application embodiment does not make specific limitations in this regard.

[0035] In this embodiment, when the machining tool assembly 1 performs deep hole machining on the arc surface 202 of the workpiece 2, the external machine tool first drives the centering cutter 100 to feed at a low speed, so that the centering rod 40 slowly enters the centering hole 206 on the side of the arc surface 202. After the centering rod 40 is fully inserted into the centering hole 206 on the side of the arc surface 202, the speed of the centering cutter 100 is increased, so that the milling rod 30 gradually drills the centering hole 206 to form the required deep hole. During this process, the centering rod 40 does not leave the arc surface 202 each time the external machine tool drives the centering cutter 100 to lift the cutter, so as to ensure that the machining center position of the centering cutter 100 does not shift. In this way, deep hole machining on the arc surface 202 of the workpiece 2 is achieved.

[0036] In this embodiment, the machining tool assembly 1 uses a centering rod 40 of a centering cutter 100 inserted into a centering hole 206. The centering rod 40 engages with the centering hole 206 to ensure stable rotation of the centering cutter 100, preventing displacement of its machining center position and thus guaranteeing machining quality. Because the centering cutter 100 can rotate stably, the risk of breakage due to vibration stress concentration is reduced, extending its service life and lowering machining costs. Furthermore, the centering cutter 100 in this embodiment's machining tool assembly 1 has dual functions of centering and deep hole machining, which not only helps ensure machining quality and reduce machining costs but also allows for wider application in other deep hole machining scenarios.

[0037] In this embodiment, the machining tool assembly 1 further includes a drilling cutter 200. The drilling cutter 200 is correspondingly disposed with the centering end mill 100. The drilling cutter 200 is used to machine a centering hole 206 penetrating from the auxiliary surface 204 to the arc surface 202. The diameter of the drilling cutter 200 is larger than the diameter of the centering rod 40 and smaller than the diameter of the milling rod 30. In this embodiment, the drilling cutter 200 can be an end mill, a face mill, or other tool capable of hole machining. Thus, by providing the aforementioned drilling cutter 200, a centering hole 206 penetrating to the arc surface 202 is machined on the auxiliary surface 204 of the workpiece 2. By limiting the diameter of the drilling cutter 200 to be larger than the diameter of the centering rod 40 and smaller than the diameter of the milling rod 30, the centering rod 40 can be inserted into the centering hole 206, while simultaneously stopping the milling rod 30, allowing the milling rod 30 to perform deep hole machining to achieve the required deep hole size.

[0038] In this embodiment, the milling bar 30 includes a plurality of helically arranged cutting edges 32, with chip removal grooves 34 formed between adjacent cutting edges 32. In this embodiment, the milling bar 30 includes two cutting edges 32 and two chip removal grooves 34, and the milling bar 30 can be understood as an end mill structure. It is understood that in other embodiments, the number of cutting edges 32 and chip removal grooves 34 may be more, and this embodiment does not specifically limit this. Thus, by limiting the milling bar 30 to include cutting edges 32, the milling bar 30 can perform the function of milling the centering hole 206; by providing the milling bar 30 with chip removal grooves 34, the chips generated during processing are discharged through the chip removal grooves 34, ensuring the smooth progress of deep hole processing.

[0039] In this embodiment, the diameter of the tool holder 10 is larger than the diameter of the extension rod 20. The end of the tool holder 10 connected to the extension rod 20 is configured as a frustum-shaped structure 12, and the diameter of the frustum-shaped structure 12 gradually decreases from the end away from the extension rod 20 to the end closer to the extension rod 20. Thus, by limiting the diameter of the tool holder 10 to be larger than the diameter of the extension rod 20, the tool holder 10 is easily clamped by an external machine tool, thereby facilitating the external machine tool to fix the centering end mill 100 by clamping and fixing the tool holder 10, ensuring the stability of the centering end mill 100 during rotation; by defining the aforementioned frustum-shaped structure 12, the connection strength between the tool holder 10 and the extension rod 20 is enhanced.

[0040] In this embodiment, the diameter of the milling rod 30 ranges from 0.8mm to 1.2mm, and preferably, the diameter of the milling rod 30 is 1mm. Understandably, the diameter of the milling rod 30 can also be 0.8mm, 0.9mm, 1.1mm, 1.2mm, etc. Thus, by limiting the diameter range of the milling rod 30, it is easier to machine the required deep hole size. However, when the diameter range of the milling rod 30 is less than 0.8mm, the structural strength of the milling rod 30 is weak and its rigidity is insufficient, leading to difficulties in deep hole machining; when the diameter range of the milling rod 30 is greater than 1.2mm, it is not suitable for machining micro deep holes.

[0041] In this embodiment, the diameter of the centering rod 40 ranges from 0.6mm to 0.8mm, preferably 0.7mm. Understandably, the diameter of the centering rod 40 can also be 0.6mm, 0.8mm, etc. Thus, by limiting the diameter range of the centering rod 40, its diameter is reasonably set so that it can be smoothly inserted into the centering hole 206. However, when the diameter of the centering rod 40 is less than 0.6mm, the diameter is too small, resulting in weak structural rigidity and making it difficult to manufacture; when the diameter of the centering rod 40 is greater than 0.8mm, the diameter is too large and unsuitable for machining micro-deep holes.

[0042] In this embodiment, the difference between the diameter of the centering hole 206 and the diameter of the centering rod 40 ranges from 0.01mm to 0.03mm, preferably 0.02mm. Understandably, the difference between the diameter of the centering hole 206 and the diameter of the centering rod 40 can also be 0.01mm, 0.03mm, etc. Thus, by limiting the range of the difference between the diameter of the centering hole 206 and the diameter of the centering rod 40, firstly, it ensures that the centering rod 40 can be smoothly inserted into the centering hole 206, and secondly, it prevents the centering rod 40 from shifting or vibrating within the centering hole 206. However, when the difference between the diameter of the centering hole 206 and the diameter of the centering rod 40 is less than 0.01 mm, it is not conducive to the smooth insertion of the centering rod 40 into the centering hole 206; when the difference between the diameter of the centering hole 206 and the diameter of the centering rod 40 is greater than 0.03 mm, the gap between the centering hole 206 and the centering rod 40 is too large, and the centering rod 40 is prone to offset vibration in the centering hole 206, which causes the centering end mill 100 to vibrate easily, affecting the machining quality.

[0043] In this embodiment, the diameter of the extension rod 20 is larger than the diameter of the milling rod 30. Understandably, the diameter of the extension rod 20 can be slightly larger than the diameter of the milling rod 30. For example, the difference between the diameters of the extension rod 20 and the milling rod 30 could be 0.01 mm. Thus, by limiting the diameter of the extension rod 20 to be larger than the diameter of the milling rod 30, the extension rod 20 and the milling rod 30 can be reasonably distinguished, while also improving the structural strength of the centering end mill 100.

[0044] Please see Figure 3 This application provides another type of centering end mill 300. In this embodiment, a plurality of cutting edges 50 are evenly arranged on the end face of the centering rod 40 away from the milling rod 30. In this embodiment, two cutting edges 50 are evenly arranged on the end face of the centering rod 40 away from the milling rod 30. It is understood that in other embodiments, the number of cutting edges 50 may be more, and this application does not specifically limit this. Thus, by limiting the end face of the centering rod 40 of the centering end mill 300 to a plurality of cutting edges 50 evenly arranged, the end of the centering end mill 300 can also be milled, which is beneficial to expanding the application range of the centering end mill 300.

[0045] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A machining tool assembly for deep hole machining of an arc surface of a workpiece, the workpiece having a centering hole penetrating the arc surface and an auxiliary surface disposed opposite to the arc surface, characterized in that, The machining tool assembly includes a centering milling cutter, which includes a tool holder, an extension rod, a milling rod, and a centering rod arranged sequentially and coaxially connected. The diameter of the centering rod is smaller than the diameter of the milling rod.

2. The machining tool assembly as described in claim 1, characterized in that, The milling bar includes several spirally arranged cutting edges, and chip removal grooves are formed between adjacent cutting edges.

3. The machining tool assembly as described in claim 1, characterized in that, The centering rod has a number of cutting edges evenly distributed on its end face away from the milling rod.

4. The machining tool assembly as described in claim 1, characterized in that, The machining tool assembly also includes a drilling cutter, which is correspondingly disposed with the centering milling cutter. The drilling cutter is used to machine the centering hole that extends from the auxiliary surface to the arc surface. The diameter of the drilling cutter is larger than the diameter of the centering rod and smaller than the diameter of the milling rod.

5. The machining tool assembly as described in claim 1, characterized in that, The diameter of the handle is larger than the diameter of the extension rod. The end of the handle connected to the extension rod is configured as a frustum-shaped structure, and the diameter of the frustum-shaped structure gradually decreases from the end away from the extension rod to the end closer to the extension rod.

6. The machining tool assembly as described in claim 1, characterized in that, The diameter of the milling rod ranges from 0.8 mm to 1.2 mm.

7. The machining tool assembly as described in claim 1, characterized in that, The diameter of the centering rod ranges from 0.6 mm to 0.8 mm.

8. The machining tool assembly as described in claim 1, characterized in that, The difference between the diameter of the centering hole and the diameter of the centering rod is in the range of 0.01mm to 0.03mm.

9. The machining tool assembly as claimed in claim 1, characterized in that, The diameter of the extension rod is larger than the diameter of the milling rod.

10. The machining tool assembly as claimed in claim 1, characterized in that, The tool holder, the extension rod, the milling rod, and the centering rod are integrally formed.

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