Bedside shaft for numerical control machine tool

Abstract

The utility model relates to the technical field of numerical control machine tools, in particular to a machine head shaft for a numerical control machine tool, which comprises a main shaft body, shaft heads are integrally formed at the two ends of the main shaft body, inner grooves are formed in the ends, away from the main shaft body, of the two shaft heads, and tightening mechanisms are arranged in the two inner grooves. The tightening mechanism comprises a hexagonal bolt head, an extrusion block and a clamping block; a ceramic layer is arranged on the outer side of the middle of the main shaft body, and a heat insulation layer is arranged on the main shaft body and located on the inner side of the ceramic layer. The main shaft body, the shaft head, the inner groove, the hexagonal bolt head, the extrusion block and the clamping block are used in cooperation, the hexagonal bolt head is rotated through a tool, the hexagonal bolt head rotates to drive the extrusion block in the inner groove to be pushed forwards towards one end of the main shaft body, and the extrusion block pushes the clamping block in the sliding groove outwards after being pushed forwards. And the four sets of clamping blocks are reversely clamped on the inner side of the bearing, and during later-period disassembly, the clamping blocks only need to be contained in the sliding grooves, so that the bearing can be taken down more conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to a headstock shaft for numerically controlled machine tools. Background Art

[0002] The headstock spindle, also known as the spindle, is one of the core components of CNC machine tools. It is responsible for rotating the cutting tool during the machining process to process the workpiece. As one of the key components of CNC machine tools, the performance of the headstock spindle directly affects the machining accuracy, efficiency and workpiece quality. Different types of CNC machine tools may be equipped with headstock spindles of different types and specifications to meet different machining requirements and industry standards.

[0003] For example, a headstock shaft for a CNC machine tool disclosed in the authorization announcement number CN106270574A includes a headstock shaft body, the headstock shaft body includes a mounting shaft section, the mounting shaft section is provided with a keyway, and the outer side of the mounting shaft section is provided with a threaded shaft section. After adopting the above technical solution, the beneficial effects of the utility model are as follows: when in use, the fixing plate is installed by the mounting shaft section, and then the nut is installed on the threaded shaft section, the fixing plate is fixed by the nut, and then the rotary cylinder is fixed on the fixing plate, the rotary cylinder is easy to fix, and the power chuck and the rotary cylinder can be installed at any time, which is convenient to use.

[0004] The above device has a simple structure and reasonable design, can meet the needs of users, and has great promotion value;

[0005] However, the above patent has the following shortcomings:

[0006] Although the headstock shaft for the above-mentioned CNC machine tool can be installed with a power chuck and a rotary cylinder at any time and is easy to use, it is relatively cumbersome to install and remove the guide bearing, and it is easy to cause the shaft head to wear, thereby reducing its service life. Utility Model Content

[0007] The purpose of the utility model is to provide a headstock axis for a numerically controlled machine tool to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A headstock shaft for a numerically controlled machine tool, comprising

[0010] A main shaft body, wherein both ends of the main shaft body are integrally formed with shaft heads, and both ends of the two shaft heads away from the main shaft body are provided with inner grooves, and the insides of the two inner grooves are provided with tightening mechanisms, and the tightening mechanisms include a hexagonal bolt head, an extrusion block and a clamping block;

[0011] A ceramic layer is arranged on the outer side of the middle part of the main shaft body, a heat insulation layer is arranged on the inner side of the ceramic layer of the main shaft body, and a hardening layer is arranged on the inner side of the heat insulation layer of the main shaft body.

[0012] Preferably, an extrusion block is movably installed inside the inner groove, sliding grooves are provided on the four outer sides of the shaft head, clamping blocks are movably installed inside the four sliding grooves, and a hexagonal bolt head is provided at one end of the extrusion block away from the main shaft body;

[0013] Preferably, the extrusion block has a threaded head integrally formed at one end close to the main shaft body, and a threaded groove matching the threaded head is formed in the middle of one end of the shaft head close to the threaded head;

[0014] Preferably, the outer surface of the ceramic layer is coated with an anti-rust coating;

[0015] Preferably, the outer surface of the rust-proof coating is coated with a wear-resistant coating, the wear-resistant coating uses nickel, chromium or titanium, and is arranged on the surface of the spindle body through an electroplating process;

[0016] Preferably, a self-lubricating film is provided on the outer side of the wear-resistant coating.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. This type of headstock shaft for a CNC machine tool is used in conjunction with a spindle body, a spindle head, an inner groove, a hexagonal bolt head, an extrusion block and a clamping block. A tool is used to rotate the hexagonal bolt head. After the hexagonal bolt head rotates, it drives the extrusion block inside the inner groove to push forward toward one end of the spindle body. After the extrusion block is pushed forward, the clamping block inside the sliding groove is pushed outward, and then it is reversely clamped on the inner side of the bearing through four groups of clamping blocks. When disassembling later, it only needs to put the clamping block into the sliding groove, which makes it more convenient to remove the bearing.

[0019] 2. A headstock shaft for a CNC machine tool. A ceramic layer is arranged on the outer side of the middle part of the spindle body. The ceramic layer is firmly attached to the surface of the spindle body by high-temperature sintering. The ceramic material is used as the surface layer, which can provide extremely high hardness and heat resistance. It is suitable for working under high-speed or high-temperature conditions, and has better heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the tightening mechanism structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the main shaft body of the utility model.

[0023] In the figure: 1. spindle body; 2. shaft head; 3. inner groove; 4. tightening mechanism; 401. hexagonal bolt head; 402. extrusion block; 403. clamping block; 5. ceramic layer; 6. heat insulation layer; 7. hardening layer; 8. sliding groove; 9. threaded head; 10. anti-rust coating; 11. wear-resistant coating; 12. lubricating film. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] like Figure 1-3 As shown, a technical solution provided by the utility model:

[0026] A headstock shaft for a numerically controlled machine tool comprises a spindle body 1, both ends of the spindle body 1 are integrally formed with spindle heads 2, the ends of the two spindle heads 2 away from the spindle body 1 are provided with inner grooves 3, and tightening mechanisms 4 are arranged inside the two inner grooves 3, and the tightening mechanism 4 comprises a hexagonal bolt head 401, an extrusion block 402 and a clamping block 403; a ceramic layer 5 is arranged on the outer side of the middle part of the spindle body 1, a heat insulation layer 6 is arranged on the inner side of the ceramic layer 5 of the spindle body 1, and a hardening layer 7 is arranged on the inner side of the heat insulation layer 6 of the spindle body 1; an extrusion block 402 is movably installed inside the inner groove 3, sliding grooves 8 are arranged on the four outer sides of the spindle head 2, and clamping blocks 403 are movably installed inside the four sliding grooves 8, and a hexagonal bolt head 401 is arranged on the end of the extrusion block 402 away from the spindle body 1; a threaded head 9 is integrally formed on the end of the extrusion block 402 close to the spindle body 1, and a threaded groove matching the threaded head 9 is arranged in the middle of the end of the spindle head 2 close to the threaded head 9;

[0027] In this embodiment, a tool is used to rotate the hexagonal bolt head 401. After the hexagonal bolt head 401 rotates, it drives the extrusion block 402 inside the inner groove 3 to push forward to one end of the main shaft body 1. After the extrusion block 402 is pushed forward, the clamping block 403 inside the sliding groove 8 is pushed outward, and then the four groups of clamping blocks 403 are reversely clamped on the inner side of the bearing. When disassembling later, it only needs to put the clamping block 403 into the sliding groove 8, which can make it more convenient to remove the bearing.

[0028] like Figure 3 As shown, the outer surface of the ceramic layer 5 is coated with an anti-rust coating 10;

[0029] In this embodiment, the anti-rust coating 10 coated on the outer surface of the ceramic layer 5 is used to prevent the main shaft body 1 from being damaged by a humid or corrosive environment and to protect the metal surface.

[0030] like Figure 3 As shown, the outer surface of the rust-proof coating 10 is coated with a wear-resistant coating 11, and the wear-resistant coating 11 uses nickel, chromium or titanium and is disposed on the surface of the spindle body 1 through an electroplating process;

[0031] In this embodiment, a metal plating layer including nickel, chromium or titanium is added to the surface of the spindle body 1 to provide additional corrosion resistance and wear resistance, which helps to improve the friction characteristics.

[0032] like Figure 3 As shown, a self-lubricating film 12 is provided on the outer side of the wear-resistant coating 11;

[0033] In this embodiment, a self-lubricating film 12 disposed on the outer side of the wear-resistant coating 11 is used to form a lubricating layer on the surface of the spindle body 1 , which can reduce friction and wear and improve the overall wear resistance of the spindle body 1 .

[0034] Working principle: When installing the guide bearing, the device respectively sleeves the two bearings on the two shaft heads 2 at both ends of the main shaft body 1, and then uses a tool to rotate the hexagonal bolt head 401. After the hexagonal bolt head 401 rotates, it drives the extrusion block 402 inside the inner groove 3 to push forward one end of the main shaft body 1. After the extrusion block 402 is pushed forward, the clamping block 403 inside the sliding groove 8 is pushed outward, and then reversely clamped on the inner side of the bearing through four groups of clamping blocks 403. When disassembling later, it only needs to put the clamping block 403 into the sliding groove 8, which can make it more convenient to remove the bearing; at the same time, the device is provided with a ceramic layer 5 on the outer side of the middle part of the main shaft body 1, and the ceramic layer 5 is firmly attached to the surface of the main shaft body 1 by high-temperature sintering. Using ceramic material as the surface layer can provide extremely high hardness and heat resistance, which is suitable for working under high-speed or high-temperature conditions, and has better heat dissipation effect.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A headstock axis for a CNC machine tool, characterized in that: include A main shaft body (1), wherein both ends of the main shaft body (1) are integrally formed with shaft heads (2), and both ends of the two shaft heads (2) away from the main shaft body (1) are provided with inner grooves (3), and both inner grooves (3) are provided with tightening mechanisms (4), and the tightening mechanisms (4) include a hexagonal bolt head (401), an extrusion block (402) and a clamping block (403); A ceramic layer (5) is arranged on the outer side of the middle part of the main shaft body (1), a heat insulation layer (6) is arranged on the inner side of the ceramic layer (5) of the main shaft body (1), and a hardening layer (7) is arranged on the inner side of the heat insulation layer (6) of the main shaft body (1).

2. The headstock axis for a CNC machine tool according to claim 1, characterized in that: An extrusion block (402) is movably installed inside the inner groove (3), sliding grooves (8) are provided on the four outer sides of the shaft head (2), clamping blocks (403) are movably installed inside the four sliding grooves (8), and a hexagonal bolt head (401) is provided at one end of the extrusion block (402) away from the main shaft body (1).

3. The headstock axis for a CNC machine tool according to claim 2, characterized in that: A thread head (9) is integrally formed at one end of the extrusion block (402) close to the main shaft body (1), and a thread groove matching the thread head (9) is provided at the middle of one end of the shaft head (2) close to the thread head (9).

4. The headstock axis for a CNC machine tool according to claim 1, characterized in that: The outer surface of the ceramic layer (5) is coated with an anti-rust coating (10).

5. The headstock axis for a CNC machine tool according to claim 4, characterized in that: The outer surface of the rust-proof coating (10) is coated with a wear-resistant coating (11), and the wear-resistant coating (11) uses nickel, chromium or titanium and is arranged on the surface of the main shaft body (1) through an electroplating process.

6. The headstock axis for a CNC machine tool according to claim 5, characterized in that: A layer of self-lubricating film (12) is provided on the outer side of the wear-resistant coating (11).

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