A cutter for a milling machine

Abstract

The utility model relates to the field of machining, especially a cutter for milling machine, the cutter for milling machine includes cutter bar, cutter body, high speed steel blade, adjusting assembly and nut, the cone part of the top of cutter bar is connected with milling machine main shaft, the bottom of cutter bar is installed with cutter body, the both ends inside of cutter body are installed with high speed steel blade for processing ring groove, adjusting assembly is installed between high speed steel blade and cutter body, adjusting assembly drives high speed steel blade to remove, the cutter for milling machine provided by the utility model realizes efficient change type through adjustable blade structure, need not to replace cutter body or blade assembly as a whole, only need to drive high speed steel blade to move along the placement groove axial movement through hexagonal sleeve screw rod, cooperate the visual adjustment of positioning pointer and scale bar, shorten the time consumption of single size adjustment, simultaneously, a set of cutter can cover a variety of diameter ring groove processing demand, need not to equip the cutter for different sizes separately.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a milling machine tool. Background Technology

[0002] In the field of machining, irregular steel plates are core basic components in industries such as engineering machinery, mining equipment, and shipbuilding. Their machining accuracy and efficiency directly determine the performance stability of downstream products. Among them, the machining of non-perforated annular grooves on irregular steel plates is a typical difficult process. These grooves are mostly used for component positioning, sealing installation, or load transfer, and must meet strict dimensional tolerance and surface finish requirements.

[0003] Currently, the industry mainly relies on customized tools or general-purpose milling cutter combinations on ordinary vertical milling machines for machining this type of groove. However, both methods have shortcomings. Traditional tools are mostly designed with fixed dimensions. When machining blind-hole annular grooves of different diameters, the entire tool body or tool rack assembly needs to be replaced. This not only leads to a backlog of tool inventory but also requires recalibration of the tools. Each tool change is time-consuming and seriously affects the processing efficiency of small batches of multi-specification workpieces. Although some adjustable tools can adjust their dimensions by moving the tool rack with screws, the adjustment process relies on manual experience and lacks a precise positioning reference, making it prone to adjustment errors and unable to meet the requirements of high-precision machining.

[0004] Therefore, it is necessary to provide a new milling machine tool to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a milling machine tool.

[0006] The milling machine tool provided by this utility model includes: a tool holder, a tool body, a high-speed steel tool strip, an adjusting component, and a nut. The tapered part at the top of the tool holder is connected to the milling machine spindle. The tool body is installed at the bottom of the tool holder. High-speed steel tool strips for machining annular grooves are installed inside both ends of the tool body. An adjusting component is installed between the high-speed steel tool strip and the tool body. The adjusting component drives the high-speed steel tool strip to move and adjust the diameter of the annular groove. A nut is installed at the bottom of the tool holder to fix the tool body on the tool holder.

[0007] Preferably, a slot is provided in the middle of the cutter body, and a flat key is fixedly connected to the bottom outer wall of the cutter shank. In the installed state, the flat key is placed inside the slot, and a threaded groove is provided at the bottom of the cutter shank and is threadedly connected to a nut.

[0008] Preferably, the adjustment assembly includes: a threaded rod, a threaded slider, and a positioning screw. Both ends of the cutter body are provided with placement grooves, and both ends of the cutter body are inserted with threaded rods. The outer wall of the threaded rod is threaded with a threaded slider, which is placed inside the placement groove and in contact with its inner wall. High-speed steel cutter strips are all sleeved on the outside of the threaded rod and placed inside the threaded slider. The inside of the threaded slider is symmetrically threaded with positioning screws, and the positioning screws all pass through the corresponding high-speed steel cutter strips.

[0009] Preferably, each of the threaded rods has a hexagonal rod fixedly connected to one of its opposite ends.

[0010] Preferably, each threaded rod has an installation groove at one end that is close to the other, and a connecting rod is symmetrically slidably connected to the outer wall of the cutter body. A U-shaped locking block is fixedly connected to the top of each connecting rod, and a spring is sleeved on the outer wall of each connecting rod. The bottom end of the spring is fixedly connected to the outer wall of the cutter body, and the top end is fixedly connected to the corresponding U-shaped locking block.

[0011] Preferably, a positioning pointer is fixedly connected to the top of each threaded slider, and a scale bar is provided on the top of the cutter body near the placement groove.

[0012] Compared with related technologies, the milling machine tool provided by this utility model has the following beneficial effects:

[0013] The adjustable tool bar structure enables efficient tool changeover; there is no need to replace the entire tool body or tool bar assembly. Simply rotate the threaded rod with a hexagonal sleeve to drive the high-speed steel tool bar to move axially along the placement groove. Combined with the visual adjustment of the positioning pointer and scale bar, the time spent on a single size adjustment is shortened. At the same time, a single set of tools can cover the machining needs of annular grooves of various diameters. There is no need to equip tools separately for different sizes, which greatly reduces the number of tools in inventory and lowers the tool procurement and storage costs for enterprises.

[0014] The threaded rod in the adjustment assembly uses a precision thread, which, together with the threaded slider and the placement groove, closely fits to significantly reduce the linear error of the blade movement. The positioning pointer and the scale bar form a visual reference, allowing operators to directly read the adjustment amount, avoiding manual estimation errors and meeting the stringent dimensional requirements of scenarios such as component positioning and sealing installation.

[0015] The tool holder and tool body are fixed by a double method of anti-rotation with a flat key and fastening with a nut, which avoids slight rotation or loosening of the tool body relative to the tool holder when rotating at high speed; the threaded rod is axially limited by a U-shaped block and a spring to prevent the threaded rod from moving after adjustment, ensuring the stability of the tool bar position. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the milling machine tool provided by this utility model;

[0017] Figure 2 for Figure 1The diagram shows the structure of the tool holder.

[0018] Figure 3 for Figure 2 A schematic diagram of a partial cross-section of the blade shown;

[0019] Figure 4 for Figure 3 The diagram shows the structure at point A.

[0020] The following are the labels in the diagram: 1. Tool holder; 2. Tool body; 3. High-speed steel tool bar; 4. Nut; 5. Slot; 6. Flat key; 7. Threaded rod; 8. Threaded slider; 9. Positioning screw; 10. Placement slot; 11. Hexagonal rod; 12. Mounting slot; 13. Connecting rod; 14. U-shaped retaining block; 15. Spring; 16. Positioning pointer; 17. Scale bar. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] Please see Figures 1 to 4A milling machine tool includes: a tool holder 1, a tool body 2, a high-speed steel tool strip 3, an adjusting assembly, and a nut 4. The tapered portion at the top of the tool holder 1 is connected to the milling machine spindle. The tool body 2 is mounted at the bottom of the tool holder 1. High-speed steel tool strips 3 for machining annular grooves are mounted inside both ends of the tool body 2. An adjusting assembly is installed between the high-speed steel tool strips 3 and the tool body 2. The adjusting assembly drives the high-speed steel tool strips 3 to move, thereby adjusting the diameter of the annular groove. A nut 4 is mounted at the bottom end of the tool holder 1 to fix the tool body 2 onto the tool holder 1. A slot 5 is provided in the middle of the tool body 2. A flat key 6 is fixedly connected to the bottom outer wall of the tool holder 1. In the installed state, the flat key 6 is placed inside the slot 5. A threaded groove is provided at the bottom of the tool holder 1 and is threadedly connected to the nut 4. The adjusting assembly includes: a threaded rod 7, a threaded slider 8, and a positioning screw 9. Placement slots 10 are provided at both ends of the tool body 2, and insertion slots 10 are provided at both ends of the tool body 2. The threaded rod 7 has a threaded slider 8 connected to its outer wall. The threaded slider 8 is placed inside the placement groove 10 and contacts its inner wall. High-speed steel blades 3 are all sleeved on the outside of the threaded rod 7 and placed inside the threaded slider 8. The threaded slider 8 has symmetrically threaded positioning screws 9 inside, and the positioning screws 9 all pass through the corresponding high-speed steel blades 3. The ends of the threaded rod 7 that are far apart from each other are fixedly connected to hexagonal rods 11. The ends of the threaded rod 7 that are close to each other are provided with mounting grooves 12. The outer wall of the blade body 2 is symmetrically slidably connected to connecting rods 13. The top of each connecting rod 13 is fixedly connected to a U-shaped locking block 14. The outer wall of each connecting rod 13 is sleeved with a spring 15. The bottom end of the spring 15 is fixedly connected to the outer wall of the blade body 2, and the top end is fixedly connected to the corresponding U-shaped locking block 14. The top of each threaded slider 8 is fixedly connected to a positioning pointer 16. The top of the blade body 2 near the placement groove 10 is provided with a scale bar 17.

[0024] It should be noted that when the diameter of the annular groove needs to be adjusted, the hexagonal sleeve is used to cover the hexagonal rod 11 at the outer end of the threaded rod 7 and rotated. The threaded rod 7 converts the rotational motion into the linear motion of the slider through the helical side effect with the threaded slider 8. Since the rotational freedom of the threaded slider 8 is restricted by the placement groove 10, it can only translate along the axial direction of the placement groove 10, thereby driving the high-speed steel blade 3 fixed in the slider to move synchronously, so as to realize the adjustment of the cutting radius.

[0025] The positioning pointer 16 on the top of the threaded slider 8 and the scale bar 17 on the surface of the cutter body 2 form a visual measurement system. The operator can directly read the movement distance of the cutter bar through the scale value indicated by the pointer. With the precision thread of the threaded rod 7, the position of the cutter bar can be precisely adjusted.

[0026] The working principle of the milling machine tool provided by this utility model is as follows:

[0027] During installation, insert the bottom of the tool holder 1 into the slot 5 in the middle of the tool body 2, so that the flat key 6 on the outer wall of the tool holder 1 is precisely embedded in the keyway on the inner wall of the slot 5, forming a circumferential anti-rotation positioning to prevent the tool body 2 from rotating relative to the tool holder 1 during high-speed cutting; then screw the nut 4 into the threaded groove at the bottom of the tool holder 1, and fix the tool body 2 on the tool holder 1 by the axial clamping force of the nut 4. Combined with the anti-torsion effect of the flat key 6, a double fixing structure is formed to ensure that the tool body 2 has no relative displacement at the spindle speed;

[0028] The high-speed steel blade 3 is fixed in the threaded slider 8 by two positioning screws 9. The screws pass through the positioning holes of the blade and are locked with the threads of the slider to achieve a rigid connection between the blade and the slider. The assembled threaded slider 8 is placed into the placement grooves 10 at both ends of the blade body 2 so that the outer wall of the slider is tightly fitted with the inner wall of the placement groove 10. Then the threaded rod 7 passes through the placement groove 10 and forms a threaded connection with the threaded slider 8.

[0029] After the threaded rod 7 passes through the placement groove 10, pull down the U-shaped locking block to move it axially along the connecting rod 13 and compress the spring 15. When the mounting groove 12 at the end of the threaded rod 7 corresponds to the position of the U-shaped locking block, release the locking block. The return force of the spring 15 pushes the U-shaped locking block into the mounting groove 12, forming an axial limit on the threaded rod 7 and preventing it from axially moving during the rotation adjustment process.

[0030] When it is necessary to adjust the diameter of the annular groove, the hexagonal sleeve is used to cover the hexagonal rod 11 at the outer end of the threaded rod 7 and rotated. The threaded rod 7 converts the rotational motion into the linear motion of the slider through the helical side effect with the threaded slider 8. Since the rotational freedom of the threaded slider 8 is restricted by the placement groove 10, it can only translate along the axial direction of the placement groove 10, thereby driving the high-speed steel blade 3 fixed in the slider to move synchronously, so as to realize the adjustment of the cutting radius.

[0031] The positioning pointer 16 on the top of the threaded slider 8 and the scale bar 17 on the surface of the cutter body 2 form a visual measurement system. The operator can directly read the movement distance of the cutter bar through the scale value indicated by the pointer; together with the precision thread of the threaded rod 7, the precise adjustment of the cutter bar position can be achieved.

[0032] The high-speed steel cutting tools 3, symmetrically mounted at both ends of the cutter body 2, are responsible for cutting the inner and outer diameters of the annular groove, respectively. During machining, the milling machine spindle drives the tool holder 1 and the cutter body 2 to rotate at high speed, and the two cutting tools cut synchronously in the same plane of rotation, avoiding the coaxiality error caused by traditional single-tool sequential machining. The cutting force is transmitted to the threaded slider 8 through the high-speed steel cutting tool 3, distributed to the cutter body 2 through the placement groove 10, and finally transmitted to the milling machine spindle by the tool holder 1. The mating structure of the flat key 6 and the slot 5 can withstand the radial cutting force, preventing the threaded connection from loosening due to excessive force and ensuring the stability of the cutting process.

[0033] All standard parts used above can be purchased from the market. Special-shaped parts can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, which will not be described in detail here.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A milling machine tool, characterized in that, include: Tool holder (1), the tapered part at the top of tool holder (1) is connected to the milling machine spindle; The blade body (2) is mounted on the bottom of the blade shank (1); High-speed steel blade (3), both ends of the blade body (2) are equipped with high-speed steel blades (3) for machining annular grooves; An adjustment assembly is installed between the high-speed steel cutter bar (3) and the cutter body (2). The adjustment assembly drives the high-speed steel cutter bar (3) to move, which is used to adjust the diameter of the machining annular groove. Nut (4): The bottom end of the tool holder (1) is fitted with a nut (4) for fixing the tool body (2) onto the tool holder (1).

2. The milling cutter according to claim 1, characterized in that, The tool body (2) has a slot (5) in the middle. The bottom outer wall of the tool bar (1) is fixedly connected to a flat key (6). In the installed state, the flat key (6) is placed inside the slot (5). The bottom of the tool bar (1) has a threaded groove and is threadedly connected to the nut (4).

3. The milling cutter according to claim 1, characterized in that, The adjustment assembly includes a threaded rod (7), a threaded slider (8), and a positioning screw (9). Both ends of the blade body (2) are provided with placement slots (10). Both ends of the blade body (2) are connected to threaded rods (7). The outer wall of the threaded rod (7) is threadedly connected to the threaded slider (8). The threaded slider (8) is placed inside the placement slot (10) and in contact with its inner wall. The high-speed steel blades (3) are all sleeved on the outside of the threaded rod (7) and placed inside the threaded slider (8). The inside of the threaded slider (8) is symmetrically threaded with positioning screws (9). The positioning screws (9) all pass through the corresponding high-speed steel blades (3).

4. The milling cutter according to claim 3, characterized in that, Each of the threaded rods (7) has a hexagonal rod (11) fixedly connected to one of its far ends.

5. The milling machine tool according to claim 3, characterized in that, The threaded rods (7) are provided with mounting grooves (12) at their close ends. The outer wall of the cutter body (2) is symmetrically connected with connecting rods (13). The top of each connecting rod (13) is fixedly connected with a U-shaped locking block (14). The outer wall of each connecting rod (13) is fitted with a spring (15). The bottom end of the spring (15) is fixedly connected to the outer wall of the cutter body (2), and the top end is fixedly connected to the corresponding U-shaped locking block (14).

6. The milling cutter according to claim 3, characterized in that, The top of each threaded slider (8) is fixedly connected with a positioning pointer (16), and the top of each cutter body (2) is provided with a scale bar (17) near the placement groove (10).

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