Grinding cutter of numerical control milling machine

Abstract

The utility model relates to a numerical control milling machine grinding cutter which comprises a mandrel and a grinding wheel, the mandrel is fixedly connected with the grinding wheel, the grinding wheel is of a bowl-shaped structure, the working end of the grinding wheel is provided with a main machining face, and the peripheral side face of the grinding wheel is provided with a side machining face. The grinding wheel is designed to be of a bowl-shaped structure, the working end of the grinding wheel is provided with a main machining face, and the peripheral side face of the grinding wheel is provided with a side machining face. When a workpiece clamped on a chuck seat of a machine tool is ground, the position, with the quality problem, of the workpiece can be independently ground, particularly for a protruding hard block, the main machining face can be adopted for directly grinding the bottom face with the hard block, the side machining face can also be adopted for grinding an inner hole with the hard block, the roughness of the grinding surface can reach Ra0.4, and the grinding precision can be improved. The requirements of drawings are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field especially relates to a numerical control milling machine grinding tool. BACKGROUND

[0002] The volute workpiece is cast steel material, and there is a certain probability of hiding sand holes, air holes and other defects in the material during casting, which will appear in the processing process, and when defects are found before finishing, technicians will leave 0.3mm allowance for repair welding and then finishing.

[0003] Based on the material defects in the hole processing of the cast steel workpiece, hard blocks appear in the welding part after welding repair, the tool post processing hole wall has a tool jumping phenomenon, which causes the tool tip of the turning tool to crack, further causing the workpiece hole to be out of round and the surface roughness to be serious, which cannot meet the requirements of the drawing. The volute workpiece will be equipped with a sealing ring for sealing in the later period, and the pressure requirement of the pressure test is 65.54 kgf / cm2. Based on the hard block status of the protrusion, the actual assembly requirements of the customer cannot be met. SUMMARY

[0004] The utility model discloses a numerical control milling machine grinding tool, which can solve the problems encountered in the background technology.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A numerical control milling machine grinding tool, comprising a mandrel and a grinding wheel, the mandrel is fixedly connected with the grinding wheel, the grinding wheel is of a bowl type structure, the working end of the grinding wheel is provided with a main machining surface, and the outer peripheral side surface of the grinding wheel is provided with a side machining surface.

[0007] In the above scheme, the grinding wheel comprises a bottom surface and a bell mouth, the bottom surface is integrally connected with the bell mouth, a mounting hole for fixing the mandrel is formed in the middle part of the bottom surface, and an inner cavity is formed between the inner part of the bottom surface and the inner side of the bell mouth; the main machining surface is located at the end face of the bell mouth, and the side machining surface is located at the side face of the bell mouth.

[0008] As a preferred scheme, the connection between the main machining surface and the side machining surface is provided at a right angle. The bottom of the mandrel is provided with a screw rod, the screw rod is threadedly connected with a nut after penetrating through the mounting hole, a gasket is further sleeved on the screw rod, and the nut presses the gasket tightly.

[0009] In one embodiment, the rear part of the mandrel is clamped and fixed with a tool holder, and the tool holder is connected with the driving end of the numerical control milling machine.

[0010] In one of the embodiments, the rear part of the mandrel is fixedly connected with a milling electric spindle, the milling electric spindle is installed in the inner cavity of the numerical control milling machine through the base, the power supply device is installed in the inner cavity of the numerical control milling machine, and the milling electric spindle is connected with the power supply device.

[0011] Compared with the prior art, the beneficial effects of the utility model are that: the grinding wheel is designed as a bowl type structure, the working end of the grinding wheel is provided with a main machining surface, and the outer peripheral side surface of the grinding wheel is provided with a side machining surface. When grinding the workpiece clamped on the machine tool chuck seat, the workpiece can be individually ground at the place where quality problems exist, especially for the protruding hard block, the main machining surface can be used to directly grind the bottom surface where the hard block exists, or the side machining surface can be used to grind the inner hole where the hard block exists. The cutter can be used for grinding machining of the plane, inner hole and side surface of the workpiece, and the grinding surface roughness can reach Ra0.4, meeting the requirements of the drawing. If the workpiece is a volute type workpiece, after the sealing ring is assembled and sealed in the later period, the requirement of the test pressure can be met, thereby meeting the requirements of the actual assembly of the customer. BRIEF DESCRIPTION OF DRAWINGS

[0012] The disclosure of the utility model will be explained with reference to the drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the utility model. In the drawings, the same reference signs are used to refer to the same parts. Among them:

[0013] Figure 1 It is the overall structure schematic view of the utility model in embodiment 1;

[0014] Figure 2 It is the structure schematic view of the grinding wheel in the utility model;

[0015] Figure 3 It is the overall structure schematic view of the utility model in embodiment 2;

[0016] Figure 4 It is the machining schematic view of the utility model in embodiment 2.

[0017] Reference signs in the drawings: 1-mandrel; 11-gasket; 12-nut; 2-grinding wheel; 21-bottom surface; 22-mounting hole; 23-flared mouth; 24-inner cavity; 25-main machining surface; 26-side machining surface; 3-tool shank; 4-milling electric spindle; 41-base; 5-power supply device; 6-machine tool chuck seat; 61-workpiece. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model will be further described in detail in combination with the drawings. These drawings are all simplified schematic views, only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the relevant components of the utility model.

[0019] According to the technical scheme of the utility model, a plurality of structure modes and implementation modes which can be replaced with each other can be proposed by the general skilled in the art without changing the essential spirit of the utility model. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the utility model, and should not be regarded as the whole of the utility model or regarded as the limitation or restriction of the technical scheme of the utility model.

[0020] The technical scheme of the utility model will be further described in detail below in combination with the drawings and embodiments.

[0021] Embodiment 1, as shown in Figure 1 and Figure 2 A numerical control milling machine tool for grinding tool, including mandrel 1 and grinding wheel 2, mandrel 1 is fixedly connected with grinding wheel 2, grinding wheel 2 is bowl type structure, the working end of grinding wheel 2 is provided with main processing surface 25, the outer peripheral side of grinding wheel 2 is provided with side processing surface 26.

[0022] When grinding the workpiece 61 clamped on the machine tool chuck seat 6, the places with quality problems of the workpiece 61 can be ground separately, especially for the protruding hard block, the main processing surface 25 can be used to directly grind the bottom surface with hard block, or the side processing surface 26 can be used to grind the inner hole with hard block.

[0023] Specifically, the grinding wheel 2 includes a bottom surface 21 and a flared mouth 23, the bottom surface 21 is integrally connected with the flared mouth 23, and the middle part of the bottom surface 21 is provided with a mounting hole 22 fixed with the mandrel 1. During installation, the bottom of the mandrel 1 is provided with a screw rod, the screw rod is threadedly connected with a nut 12 after penetrating through the mounting hole 22, and a gasket 11 is further sleeved on the screw rod. The nut 12 presses the gasket 11 tightly, so that the grinding wheel 2 is fixed firmly.

[0024] The inner part of the bottom surface 21 and the inner side of the flared mouth 23 form an inner cavity 24, which can temporarily store a certain amount of grinding powder during work. The main processing surface 25 is located at the end face of the flared mouth 23, and directly grinds the bottom blind hole of the workpiece 61. The side processing surface 26 is located at the side of the flared mouth 23, and can grind the inner hole of the volute type workpiece.

[0025] As a preferred scheme, the connection between the main processing surface 25 and the side processing surface 26 is arranged at a right angle, and during work, the side processing surface 26 is parallel to the outer wall of the inner hole of the workpiece 61, facilitating direct grinding of the inner hole.

[0026] In implementation, the rear part of the mandrel 1 is clamped and fixed with a tool holder 3, which can be clamped and connected with the side milling head of the driving end of the numerical control milling machine directly. Under the driving of the servo motor of the numerical control milling machine, the tool holder 3 and the grinding wheel 2 are rotated at high speed, and the workpiece 61 is ground.

[0027] The embodiment 2 is different from the embodiment 1 in that a milling electric spindle 4 is fixedly connected to the rear part of the mandrel 1, the milling electric spindle 4 can adopt an outsourced product with a model of GDZ-80-2.2, a specification of φ80*256, a voltage of 220V, a power of 2200W and a rotating speed of 12000-24000rpm, the milling electric spindle 4 is installed in the inner cavity of the numerical control milling machine through a base 41, a power supply device 5 is installed in the inner cavity of the numerical control milling machine, and the milling electric spindle 4 is connected with the power supply device 5.

[0028] The tool is used for remedial grinding of the workpiece 61 with an inner hole or a bottom surface quality problem on the numerical control milling machine, the grinding wheel is connected to the tool holder 3 of the milling machine through the mandrel 1, and is locked by a screw.

[0029] The grinding wheel 2 needs to be flattened by a diamond dressing pen before the tool is ground, the shape and model of the grinding wheel 2 are selected according to the requirements of the machined surface, and the tool is mainly used for improving the roughness of the machined surface of the workpiece 61 or grinding the superhard material. The inner hole of the workpiece 61 is ground by using the circular interpolation function of the numerical control machine tool, and the roundness and surface roughness after machining can meet the requirements of the drawing, and the surface roughness can reach Ra0.4.

[0030] The processing function of the tool is extended, not only the inner hole can be ground, but also the plane, the contour and even the curved surface can be ground by selecting a suitable grinding wheel. Therefore, the tool can be used for grinding the plane, the inner hole and the side surface of the workpiece 61, the grinding surface roughness can reach Ra0.4, and the requirements of the drawing can be met. If the workpiece 61 is a volute workpiece, the sealing ring is assembled and sealed in the later stage, the test pressure requirements can be met, so that the actual assembly requirements of the customer can be met.

[0031] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the tool, and it should be understood that the above specific embodiments are only specific embodiments of the tool, and are not used to limit the protection scope of the tool, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the tool should be included in the protection scope of the tool.

Claims

1. A numerically controlled milling machine grinding tool, characterized by: Including the mandrel (1) and the grinding wheel (2), the mandrel (1) is fixedly connected with the grinding wheel (2), the grinding wheel (2) is the bowl type structure, the working end of the grinding wheel (2) is equipped with the main processing surface (25), the outer peripheral side of the grinding wheel (2) is equipped with the side processing surface (26).

2. A numerically controlled milling machine tool according to claim 1, characterised in that: The grinding wheel (2) includes the bottom surface (21) and the bell mouth (23), the bottom surface (21) is integrally connected with the bell mouth (23), the middle part of the bottom surface (21) is provided with the mounting hole (22) fixed with the mandrel (1), the inside of the bottom surface (21) and the inside of the bell mouth (23) form the inner cavity (24); The main processing surface (25) is located at the end surface of the bell mouth (23), and the side processing surface (26) is located at the side surface of the bell mouth (23).

3. A numerically controlled milling machine tool according to claim 2, wherein: The junction of the main processing surface (25) and the side processing surface (26) is provided at a right angle.

4. A numerically controlled milling machine tool according to claim 2, wherein: The bottom of the mandrel (1) is provided with a screw rod, the screw rod is threadedly connected with a nut (12) after penetrating through the mounting hole (22), and a gasket (11) is further sleeved on the screw rod, and the nut (12) presses the gasket (11).

5. The numerically controlled milling machine tool of claim 1 wherein: The rear part of the mandrel (1) is clamped and fixed with a tool shank (3), and the tool shank (3) is connected with the driving end of the numerical control milling machine.

6. The numerically controlled milling machine tool of claim 1 wherein: The rear part of the mandrel (1) is fixedly connected with a milling electric spindle (4), the milling electric spindle (4) is installed in the inner cavity of the numerical control milling machine through a base (41), a power supply device (5) is installed in the inner cavity of the numerical control milling machine, and the milling electric spindle (4) is connected with the power supply device (5).

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