Lengthened milling cutter and milling equipment
By designing an extended milling cutter including a milling cutter body, a first extended rod and a plurality of second extended rods, combining a high-speed steel milling cutter and a coolant injection assembly, the problems of difficulty and cost of processing the main oil channel hole are solved. Accurate processing and cost savings are achieved, and are suitable for cylinder blocks and cylinder heads of different models and sizes.
Patent Information
- Application Number
- CN202420169590.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-01-24
AI Technical Summary
During the research and development and trial production of engine cylinder block and cylinder head, the ratio of the depth to the aperture of the main oil channel is relatively large, resulting in easy deflection and vibration during drilling, making it difficult to ensure surface roughness and dimensional accuracy, and customized extended internal cooling milling The knife costs are high and the production cycle is long, which affects the progress of product research and development.
Design an extended milling cutter, including a milling cutter body, a first extended rod and a plurality of second extended rods, formed by threaded connection, and a coolant jet assembly is installed inside, and a high-speed steel milling cutter and a plurality of extended rods are combined, suitable for Machined cylinder blocks and cylinder head oil channel holes of different models and sizes.
It realizes precise processing of main oil channel holes, reduces processing difficulty and cost, shortens production cycle, improves product research and development progress, and is suitable for cylinder blocks and cylinder heads of different models and sizes.
Smart Images
Figure CN222492332U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to an extended milling cutter and milling equipment. Background Art
[0002] During the development and trial production of engine cylinder blocks and cylinder heads, it is often encountered that the main oil gallery holes are precast holes. The main oil gallery holes are deep holes, which are very difficult to process. Due to the large ratio of hole depth to hole diameter, the slender tool bar and poor rigidity, it is easy to deflect during drilling, resulting in vibration, which makes it difficult to ensure the surface roughness and dimensional accuracy of the hole. The working environment of the drill bit is poor, heat is not easy to discharge, and chip removal is difficult, which aggravates tool wear. Therefore, only customized extended internal coolant milling cutters can be used for processing. The depth and size of the main oil gallery holes are large. Customized non-standard extended internal coolant milling cutters are very costly and have a long production cycle, which seriously affects the progress of product development, and is not suitable for the development and processing of cylinder blocks and cylinder heads of different models. Summary of the invention
[0003] The purpose of the utility model is to provide an extended milling cutter and milling equipment to solve the problem of difficulty in processing the main oil channel holes during the research and development and trial production of cylinder blocks and cylinder heads, ensure the progress of product development, save the cost of purchasing cutting tools, ensure the dimensional accuracy of the oil channel holes after processing, and be suitable for the processing of oil channel holes of cylinder blocks and cylinder heads of different models and sizes.
[0004] The specific contents of the plan are as follows:
[0005] An extended milling cutter comprises a milling cutter body, a first extension rod and at least one second extension rod. The milling cutter body is threadedly connected to one end of the first extension rod. A coolant injection assembly is provided at the connecting end of the first extension rod and the milling cutter body. The first extension rod is threadedly connected to the second extension rod. A first inner cooling hole is axially penetrated inside the first extension rod. A second inner cooling hole is axially penetrated inside the second extension rod. The coolant injection assembly is arranged on the first inner cooling hole.
[0006] The milling cutter body of the extended milling cutter adopts a high-speed steel milling cutter, and an internal thread connection hole is provided at the end of the tool clamping handle of the milling cutter body, and an external thread connection shaft and an internal thread connection hole are provided at both ends of the first extension rod and the second extension rod. The end of the tool clamping handle of the milling cutter body is connected to the head end of the thread of the first extension rod, and the tail end of the first extension rod is threadedly connected to the second extension rod. The number of the second extension rods is selected according to the depth of the main oil channel hole to be processed, which can meet the processing needs of cylinder blocks and cylinder heads of different models. The second extension rods can be threadedly connected in pairs. The first extension rod and the second extension rod have the same diameter, and both are provided with through holes, namely the first inner cooling hole and the second inner cooling hole, in the axial direction. The first inner cooling hole is closed at one end close to the high-speed steel milling cutter. The first inner cooling hole and the second inner cooling hole have the same diameter and are coaxial. After the first extension rod and the second extension rod are threadedly connected, the first inner cooling hole and the second inner cooling hole are completely connected together to form a flow channel for the coolant. Four groups of coolant injection assemblies are arranged on the outer wall of the first extension rod near the high-speed steel milling cutter, and the coolant injection assembly includes a coolant injection inclined hole and a coolant guide groove. One end of the coolant injection inclined hole is connected to the first inner cooling hole, and the other end is connected to the coolant guide groove. The coolant can be sprayed out from the first inner cooling hole along the coolant injection inclined hole, and flow along the coolant guide groove to the cutting edge of the milling cutter body. The four coolant guide grooves are evenly arranged on the outer wall of the first extension rod near the milling cutter body, and the coolant guide groove is opened on the circumferential side wall of the first extension rod near the milling cutter body. The coolant can flow down to the cutting edge along the coolant guide groove. When the high-speed steel milling cutter is processing the main oil channel hole, heat is generated during processing, and the coolant plays a role in cooling down, protecting the high-speed steel milling cutter from damage.
[0007] Furthermore, when there are two or more second extension rods, the second extension rods are threadedly connected in pairs end to end in sequence.
[0008] The second extension rod is provided with an external threaded connecting shaft and an internal threaded connecting hole at both ends, and two or more second extension rods can be threadedly connected to each other end to end, and the number of second extension rods can be selected according to the depth of the main oil channel hole. Therefore, the utility model can be applied to the processing of oil channel holes of cylinder blocks and cylinder heads of different models and sizes, without the need to customize extended milling cutters of different specifications, thereby reducing costs, reducing waiting time, and improving production efficiency.
[0009] Furthermore, the milling cutter body includes an integral cutting edge and a tool clamping handle, an internal threaded connection hole is provided at the end of the tool clamping handle, two notches are symmetrically provided on the outer wall of the tool clamping handle, and the outer diameter of the tool clamping handle is smaller than the outer diameter of the cutting edge.
[0010] The outer diameter of the tool holder is smaller than the outer diameter of the cutting edge, which can ensure that the coolant flows smoothly to the cutting edge of the high-speed steel milling cutter. Two notches are symmetrically arranged on the outer wall of the tool holder, so that when the high-speed steel milling cutter is threadedly connected and fixed to the first extension rod, the notch is fixed with a wrench, and a hexagonal wrench is inserted into the hexagonal countersunk hole of the first extension rod to tighten and fix the first extension rod; when the second extension rod is threadedly connected, the same operation method is used.
[0011] Furthermore, the outer diameter of the first extension rod is larger than the outer diameter of the tool clamping handle and smaller than the outer diameter of the cutting edge, the outer diameters of the first extension rod and the second extension rod are the same, the outer diameters of the first inner cooling hole and the second inner cooling hole are the same, and the first extension rod and the second extension rod are respectively provided with matching externally threaded connecting shafts and internally threaded connecting holes at both ends, and the outer sides of the internally threaded connecting holes are provided with hexagonal countersunk holes.
[0012] The first inner coolant hole and the second inner coolant hole have the same outer diameter, and the first extension rod and the second extension rod have the same outer diameter. After the first extension rod and the second extension rod are threadedly connected, the first inner coolant hole and the second inner coolant hole are completely connected together to form a coolant flow channel, and the coolant can flow along the second inner coolant hole to the first inner coolant hole, and then be sprayed from the coolant spraying inclined hole connected to the first inner coolant hole into the coolant guide groove, and flow along the coolant guide groove to the cutting edge of the high-speed steel milling cutter. The outer diameter of the first extension rod is larger than the outer diameter of the tool clamping handle, so that the coolant can fall directly onto the cutting edge of the high-speed steel milling cutter. The outer diameter of the first extension rod is smaller than the outer diameter of the cutting edge, ensuring that the extension rod and the main oil channel do not scratch when machining the main oil channel hole. The tail ends of the first extension rod and the second extension rod are both provided with internal threaded connection holes, and hexagonal countersunk holes are provided on the outside of the internal threaded connection holes. The hexagonal countersunk holes are used to tighten and fix the high-speed steel milling cutter when it is threadedly connected to the first extension rod and the second extension rod.
[0013] Furthermore, two to four groups of coolant injection assemblies are circumferentially arranged on the first extension rod, each group of coolant injection assemblies includes a coolant injection inclined hole and a coolant guide groove, the first inner cooling hole is closed at one end close to the milling cutter body, one end of the coolant injection inclined hole is connected to the first inner cooling hole, and the other end of the coolant injection inclined hole is connected to the coolant guide groove, the coolant guide grooves are evenly arranged on the outer side wall of the first extension rod close to the milling cutter body, and the coolant guide grooves are opened on the circumferential side wall of the first extension rod close to the milling cutter body.
[0014] Two to four coolant guide grooves are evenly arranged on the outer side wall of the first extension rod near the high-speed steel milling cutter. The coolant guide groove is provided with an opening on the circumferential side wall of the first extension rod near the high-speed steel milling cutter, so that the coolant can flow along the opening to the cutting edge of the high-speed steel milling cutter. The number of coolant injection inclined holes matches the number of coolant guide grooves. One end of the coolant injection inclined hole is connected to the closed end near the first inner cooling hole, and the other end is connected to the coolant guide groove. The coolant flows to the closed end of the first inner cooling hole, and then sprays out from the coolant injection inclined hole into the coolant guide groove, and then flows along the opening of the coolant guide groove to the cutting edge of the high-speed steel milling cutter.
[0015] Furthermore, the included angle between the coolant injection inclined hole and the outer side wall of the first extension rod is 10°, and the diameter of the coolant injection inclined hole is 1 mm to 2 mm.
[0016] The coolant injection inclined hole is a small diameter inclined hole with an included angle of 10° with the outer wall of the first extension rod. The diameter of the coolant injection inclined hole is 1mm to 2mm, which ensures the injection direction of the coolant so that the coolant can flow smoothly into the coolant guide groove and then flow along the coolant guide groove to the high-speed steel milling cutter.
[0017] Furthermore, the milling cutter body is a high-speed steel milling cutter.
[0018] The milling cutter body uses a high-speed steel milling cutter instead of an alloy milling cutter, mainly because the high-speed steel milling cutter has low cost and the material is suitable for processing.
[0019] A milling device comprises the lengthened milling cutter.
[0020] Compared with the prior art, the utility model has the following beneficial effects:
[0021] 1. The utility model is an extended internal cooling milling cutter, which replaces the original drill bit to process the main oil channel hole, avoids the problem of tool wear caused by poor working environment of the drill bit and difficulty in discharging heat, and reduces the difficulty of processing.
[0022] 2. The utility model is an extended internally cooled milling cutter, which is formed by a milling cutter body, a first extension rod and a plurality of second extension rods being threadedly connected. The first extension rod and the second extension rod have a large diameter and strong rigidity, which avoids the problem that the original drill bit is prone to deflection and vibration during drilling due to the large ratio of hole depth to hole diameter, the slender tool bar and poor rigidity when processing the main oil channel hole, and can ensure the processing size accuracy and the smoothness of the processed surface.
[0023] 3. The utility model adopts a high-speed steel milling cutter, which is easy to process and has low cost. The high-speed steel milling cutter is threadedly connected to the first extension rod and the second extension rod. The number of the second extension rods can be selected according to the depth size of the main oil channel hole to be processed. It is suitable for the processing of oil channel holes of cylinder blocks and cylinder heads of different models and sizes, avoiding the high cost and long production cycle of the original customized non-standard extended internal cooling milling cutter, which seriously affects the progress of product research and development. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0025] Figure 2 It is a structural schematic diagram of the milling cutter body of the utility model;
[0026] Figure 3 It is a structural schematic diagram of the first extension rod of the utility model;
[0027] Figure 4 It is a cross-sectional view of the first extension rod of the utility model;
[0028] Figure 5 It is a structural schematic diagram of the second extension rod of the utility model;
[0029] Figure 6 It is a cross-sectional view of the second extension rod of the utility model;
[0030] Figure 7 This is a schematic diagram of the installation of the utility model.
[0031] In the figure: 1. milling cutter body; 1-1. cutting edge; 1-2. tool holder; 1-2-1. notch; 2. first extension rod; 2-1. coolant injection assembly; 2-1-1. coolant injection inclined hole; 2-1-2. coolant guide groove; 2-2. first inner coolant hole; 3. second extension rod; 3-1.
[0032] Second internal coolant hole. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.
[0035] It should be noted that the directions or positional relationships indicated by the terms "front", "rear", "inside" and "outside" in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0036] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.
[0037] The embodiment provided by the utility model, that is, an embodiment of a lengthened milling cutter and a milling device, is described below in combination with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 Provide detailed explanation.
[0038] Embodiment 1:
[0039] See Figure 1 , Figure 7 As shown, an extended milling cutter includes a milling cutter body 1, a first extension rod 2 and at least one second extension rod 3. The milling cutter body 1 is threadedly connected to one end of the first extension rod 2. A coolant injection assembly 2-1 is provided at the connecting end of the first extension rod 2 and the milling cutter body 1. The first extension rod 2 is threadedly connected to the second extension rod 3. A first inner cooling hole 2-2 is axially penetrated in the interior of the first extension rod 2. A second inner cooling hole 3-1 is axially penetrated in the interior of the second extension rod 3. The coolant injection assembly 2-1 is arranged on the first inner cooling hole 2-2.
[0040] When there are two or more second extension rods, the second extension rods 3 are threadedly connected in pairs end to end.
[0041] See Figure 2 As shown, the milling cutter body 1 includes an integral cutting edge 1-1 and a tool clamping handle 1-2, an internal threaded connecting hole is provided at the end of the tool clamping handle 1-2, two notches 1-2-1 are symmetrically provided on the outer wall of the tool clamping handle 1-2, and the outer diameter of the tool clamping handle 1-2 is smaller than the outer diameter of the cutting edge 1-1.
[0042] See Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the outer diameter of the first extension rod 2 is larger than the outer diameter of the tool holding handle 1-2 and smaller than the outer diameter of the cutting edge 1-1, the outer diameters of the first extension rod 2 and the second extension rod 3 are the same, the outer diameters of the first inner cooling hole 2-2 and the second inner cooling hole 3-1 are the same, and the first extension rod 2 and the second extension rod 3 are respectively provided with matching external threaded connecting shafts and internal threaded connecting holes at both ends, and the outer sides of the internal threaded connecting holes are provided with hexagonal countersunk holes.
[0043] See Figure 3 , Figure 4 As shown, two to four groups of coolant injection assemblies 2-1 are circumferentially arranged on the first extension rod 2, each group of coolant injection assemblies 2-1 includes a coolant injection inclined hole 2-1-1 and a coolant guide groove 2-1-2, the first inner cooling hole 2-2 is closed at one end close to the milling cutter body 1, one end of the coolant injection inclined hole 2-1-1 is connected to the first inner cooling hole 2-2, the other end of the coolant injection inclined hole 2-1-1 is connected to the coolant guide groove 2-1-2, the coolant guide groove 2-1-2 is evenly arranged on the outer side wall of the first extension rod 2 close to the milling cutter body 1, and the coolant guide groove 2-1-2 is opened on the circumferential side wall of the first extension rod 2 close to the milling cutter body 1.
[0044] The included angle between the coolant injection inclined hole 2-1-1 and the outer side wall of the first extension rod 2 is 10°, and the diameter of the coolant injection inclined hole 2-1-1 is 1 mm to 2 mm.
[0045] The milling cutter body 1 is a high speed steel milling cutter.
[0046] The installation and use method of the extended milling cutter of the utility model are as follows:
[0047] First, the internal thread connection hole of the milling cutter body 1, i.e., the high-speed steel milling cutter, is threadedly connected with the external thread connection shaft of the first extension rod 2, and then the notch 1-2-1 on the tool clamping handle 1-2 of the milling cutter body 1 is fixed with a wrench, and then a hexagonal wrench is inserted into the hexagonal countersunk hole of the first extension rod 2 to tighten and fix the first extension rod 2; then the external thread connection shaft of the second extension rod 3 is threadedly connected with the internal thread connection hole at the tail of the first extension rod 2, and the notch 1-2-1 of the tool clamping handle 1-2 is fixed with a wrench, and then a hexagonal wrench is inserted into the hexagonal countersunk hole at the tail of the second extension rod 3 to tighten and fix the second extension rod 3. If the depth of the main oil channel hole is large, multiple second extension rods 3 need to be threadedly connected in pairs, and the connection, tightening and fixing operations described above are repeated; the tail end of the second extension rod 3 in the last position is connected to the machine tool. When the high-speed steel milling cutter processes the main oil channel hole, after the high-pressure internal cooling of the machine tool is turned on, the coolant first flows through the second internal cooling hole 3-1 of the second extension rod 3, and then flows to the first internal cooling hole 2-2 of the first extension rod 2, and is ejected from the coolant injection inclined hole 2-1-1 of the first internal cooling hole 2-2, and then flows along the coolant guide groove 2-1-2 to the cutting edge 1-1 of the high-speed steel milling cutter 1, until the tip of the tool, to provide protection for the cooling of the cutting edge 1-1 when processing the main oil channel hole.
[0048] Embodiment 2:
[0049] The utility model also provides a milling device, comprising the lengthened milling cutter.
[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An extended milling cutter, comprising a milling cutter body (1), characterized in that: A first extension rod (2) and at least one second extension rod (3), the milling cutter body (1) is connected to one end of the first extension rod (2), a coolant injection assembly (2-1) is provided at the connection end between the first extension rod (2) and the milling cutter body (1), the first extension rod (2) is connected to the second extension rod (3), a first inner cooling hole (2-2) is axially penetrated inside the first extension rod (2), a second inner cooling hole (3-1) is axially penetrated inside the second extension rod (3), and the coolant injection assembly (2-1) is arranged on the first inner cooling hole (2-2).
2. The lengthened milling cutter according to claim 1, characterized in that: When there are two or more second extension rods, the second extension rods (3) are threadedly connected in pairs end to end.
3. The lengthened milling cutter according to claim 2, characterized in that: The milling cutter body (1) comprises an integrally formed cutting edge (1-1) and a tool clamping handle (1-2); an internal threaded connection hole is provided at the end of the tool clamping handle (1-2); two notches (1-2-1) are symmetrically provided on the outer side wall of the tool clamping handle (1-2); and the outer diameter of the tool clamping handle (1-2) is smaller than the outer diameter of the cutting edge (1-1).
4. The lengthened milling cutter according to claim 3, characterized in that: The outer diameter of the first extension rod (2) is larger than the outer diameter of the tool holding handle (1-2) and smaller than the outer diameter of the cutting edge (1-1); the outer diameters of the first extension rod (2) and the second extension rod (3) are the same; the outer diameters of the first inner cooling hole (2-2) and the second inner cooling hole (3-1) are the same; both ends of the first extension rod (2) and the second extension rod (3) are respectively provided with matching external threaded connecting shafts and internal threaded connecting holes, and the outer sides of the internal threaded connecting holes are provided with hexagonal countersunk holes.
5. The lengthened milling cutter according to claim 4, characterized in that: Two to four groups of coolant injection assemblies (2-1) are circumferentially arranged on the first extension rod (2), each group of the coolant injection assemblies (2-1) comprises a coolant injection inclined hole (2-1-1) and a coolant guide groove (2-1-2), one end of the first inner cooling hole (2-2) close to the milling cutter body (1) is closed, one end of the coolant injection inclined hole (2-1-1) is connected to the first inner cooling hole (2-2), and the other end of the coolant injection inclined hole (2-1-1) is connected to the coolant guide groove (2-1-2), the coolant guide groove (2-1-2) is evenly arranged on the outer side wall of the first extension rod (2) close to the milling cutter body (1), and the coolant guide groove (2-1-2) is opened on the circumferential side wall of the first extension rod (2) close to the milling cutter body (1).
6. The lengthened milling cutter according to claim 5, characterized in that: The included angle between the cooling liquid spraying inclined hole (2-1-1) and the outer side wall of the first extension rod (2) is 10°, and the diameter of the cooling liquid spraying inclined hole (2-1-1) is 1 mm to 2 mm.
7. The lengthened milling cutter according to claim 6, characterized in that: The milling cutter body (1) is a high-speed steel milling cutter.
8. A milling device, characterized in that: The invention comprises an extended milling cutter as claimed in any one of claims 1 to 7.