A multi-stage drilling and milling cutter for cylinder head

Abstract

The utility model provides a kind of cylinder cover multi-stage drilling milling cutter, belong to milling cutter field, including milling cutter and the milling groove being set on the outer wall of milling cutter, milling cutter inner wall is equipped with chip removal passage, chip removal passage is linked with milling groove, milling cutter top is equipped with cooling liquid passage, three groups of injection holes are set in the outer side wall of milling cutter, the utility model is equipped with chip removal passage, the collaborative design of chip removal passage and milling groove, in combination with the ceramic coating of chip removal passage inner wall, significantly improve the efficiency of chip removal, reduce chip jamming, simultaneously, chip removal notch and chip removal passage are communicated, form the rapid chip discharge path, reduce the surface scratch during machining, improve processing quality;By setting cooling liquid passage and the combination of three groups of downwardly inclined injection holes, realize that cooling liquid is accurately injected to deep hole machining area, reduce tool and workpiece temperature, improve cooling efficiency, further improve processing quality.

Description

Technical Field

[0001] This utility model relates to the field of milling cutters, and more specifically, to a multi-stage drilling milling cutter for cylinder heads. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. During operation, the cutting teeth sequentially and intermittently remove the excess material from the workpiece. Milling cutters are mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces. Multi-stage drilling and milling cutters are required when machining cylinder heads.

[0003] Current multi-stage drilling and milling cutters have poor chip removal performance when machining cylinder heads, and waste chips easily clog the inner wall of the milling groove, thus affecting the machining quality. Moreover, during machining, coolant needs to be sprayed onto the machining area. Currently, most of them use external spraying devices to spray coolant. When machining deep holes, it is difficult to spray coolant into the drilled hole, resulting in a large temperature difference between the inside and outside, poor cooling effect, poor cooling and chip removal effect, and affecting the machining quality. How to invent a multi-stage drilling and milling cutter for cylinder heads to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a multi-stage drilling and milling cutter for cylinder heads, which aims to improve the problem that current multi-stage drilling and milling cutters have poor chip removal effect when machining cylinder heads, and that waste chips easily clog the inner wall of the milling groove, thus affecting the machining quality.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a multi-stage drilling and milling cutter for cylinder heads, including a milling cutter and a milling groove formed on the outer wall of the milling cutter. A chip removal channel is formed on the inner wall of the milling cutter, and the chip removal channel is connected to the milling groove. A coolant channel is formed on the top of the milling cutter, and three sets of spray holes are formed on the outer wall of the milling cutter.

[0007] Preferably, the chip removal channel is shaped to match the milling groove, and the inner wall of the chip removal channel is coated with a ceramic coating.

[0008] Preferably, a reinforcing rib is embedded in the inner wall of the milling cutter, and the reinforcing rib is made of aluminum alloy.

[0009] Preferably, all three sets of nozzles are inclined downwards, and all three sets of nozzles are connected to the coolant channel.

[0010] Preferably, the side wall of the milling cutter is provided with a chip removal groove, which is connected to the chip removal channel.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model significantly improves chip removal efficiency and reduces chip blockage by setting up a chip removal channel and coordinating the chip removal channel with the milling groove, combined with the ceramic coating on the inner wall of the chip removal channel. At the same time, the chip removal groove is connected to the chip removal channel to form a fast chip removal path, reducing scratches on the machined surface and improving the machining quality.

[0013] 2. This utility model achieves precise spraying of coolant to the deep hole machining area by setting up a coolant channel and three sets of downward tilting spray holes, thereby reducing the temperature of the tool and workpiece, improving cooling efficiency, and further improving machining quality.

[0014] 3. By setting reinforcing ribs, this utility model can improve the rigidity of the overall milling cutter, increase its bending strength, avoid hole diameter deviation caused by machining vibration, and improve machining quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a sectional view of the milling cutter structure of this utility model;

[0018] Figure 3 This is a utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0019] In the diagram: 1. Milling cutter; 2. Milling groove; 3. Spray nozzle; 4. Chip removal groove; 5. Coolant channel; 6. Chip removal channel; 7. Reinforcing rib. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example, refer to Figures 1-3A multi-stage drilling and milling cutter for cylinder heads includes a milling cutter 1 and a milling groove 2 formed on the outer wall of the milling cutter 1. A chip removal channel 6 is formed on the inner wall of the milling cutter 1, which is connected to the milling groove 2. A coolant channel 5 is formed on the top of the milling cutter 1, and three sets of spray holes 3 are formed on the outer wall of the milling cutter 1.

[0022] The chip removal channel 6 is shaped to match the milling groove 2. The inner wall of the chip removal channel 6 is coated with a ceramic coating. The side wall of the milling cutter 1 is provided with a chip removal slot 4, which is connected to the chip removal channel 6.

[0023] It should be noted that the chips generated during processing enter the chip removal channel 6 through the milling groove 2. With the help of the ceramic coating, chip adhesion can be reduced. The chip removal channel 6 is connected to the chip removal slot 4, so the rotation of the milling cutter 1 can generate centrifugal force. Under the action of centrifugal force, the chips are thrown out to the chip removal slot 4, thus achieving continuous chip removal.

[0024] The inner wall of the milling cutter 1 is fitted with a reinforcing rib 7, which is made of aluminum alloy.

[0025] It should be noted that: four sets of reinforcing ribs 7 are arranged in a circular array inside the milling cutter 1. Under the action of the reinforcing ribs 7, the overall strength of the milling cutter 1 can be improved, so that the milling cutter 1 can suppress the vibration during high-speed rotation when drilling the cylinder head and improve the machining accuracy.

[0026] All three sets of nozzles 3 are inclined downwards, and all three sets of nozzles 3 are connected to the coolant channel 5.

[0027] It should be noted that the spray nozzle is set at a downward tilt of 30 degrees to ensure that the coolant is sprayed directly onto the contact surface between the cutting edge of the tool and the workpiece. During deep hole machining, the coolant forms a laminar flow coverage, which improves the cooling effect.

[0028] Working principle: The cylinder head is clamped and fixed using a fixture. The milling cutter 1 is installed on the drive unit, and the coolant channel 5 is rotatably connected to the external liquid supply pipe (so that the external liquid supply pipe will not rotate when the milling cutter 1 rotates). The drive unit drives the milling cutter 1 to rotate and drill holes in the cylinder head. The coolant is input through the coolant channel 5 and flows along the internal pipeline to three sets of spray holes 3. The spray holes 3 ensure that the coolant is directly sprayed onto the contact surface between the cutting edge of the tool and the workpiece. The chips generated during machining enter the chip removal channel 6 through the milling groove 2. The centrifugal force generated by the rotation of the milling cutter 1 throws the chips out to the chip removal groove 4 under the action of centrifugal force, realizing continuous chip removal.

[0029] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage drilling and milling cutter for cylinder head, comprising a cutter (1) and a milling groove (2) formed on the outer wall of the cutter (1), characterized in that, The milling cutter (1) has a chip removal channel (6) on its inner wall, which is connected to the milling groove (2). The top of the milling cutter (1) has a coolant channel (5), and the outer wall of the milling cutter (1) has three sets of spray holes (3).

2. The multi-stage cylinder head drilling and milling cutter according to claim 1, characterized in that, The chip removal channel (6) is shaped to match the milling groove (2), and the inner wall of the chip removal channel (6) is coated with a ceramic coating.

3. The multi-stage cylinder head bore milling cutter of claim 1, wherein, The milling cutter (1) has a reinforcing rib (7) embedded in its inner wall. The reinforcing rib (7) is made of aluminum alloy.

4. A multi-stage drilling and milling cutter for cylinder heads according to claim 1, characterized in that, All three sets of nozzles (3) are inclined downwards, and all three sets of nozzles (3) are connected to the coolant channel (5).

5. The multi-stage cylinder head bore milling cutter of claim 1, wherein, The milling cutter (1) has a chip removal groove (4) on its side wall, and the chip removal groove (4) is connected to the chip removal channel (6).

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