High-precision dead center structure of tailstock for numerical control lathe

Abstract

The utility model discloses a high accuracy tailstock dead centre structure for numerical control lathe, include: tailstock body, front end flange, dustproof ring, tailstock sleeve, tight sleeve, tailstock mandrel, first angular contact ball bearing, first precision locking nut, bearing gland, second angular contact ball bearing and second precision locking nut, first precision locking nut will be fixed in the front end of tailstock mandrel with first angular contact ball bearing, second precision locking nut will be fixed in the rear end of tailstock mandrel with second angular contact ball bearing, bearing gland will be fixed in tailstock sleeve with tailstock mandrel, tailstock sleeve is fixed in tailstock body with front end flange, dustproof ring and tight sleeve. The tailstock dead centre structure of the utility model can effectively resist the impact of cutting force, guarantee the machining accuracy of workpiece, can prevent water and dust from entering the inside sleeve, prevent water mist and cutting debris from entering the inside, prolong the service life of the centre, reduce the production cost, improve the installation accuracy of workpiece.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing equipment, specifically relating to a high-precision tailstock dead center structure for CNC lathes. Background Technology

[0002] Traditional lathe tailstock center structures have several limitations. For example, they lack rigidity, making them susceptible to deformation under cutting forces during machining, leading to decreased workpiece machining accuracy. Furthermore, the fit between the center and the workpiece's center hole is difficult to control precisely, and the center wears easily after prolonged use, requiring frequent replacement, which impacts production efficiency and machining quality.

[0003] In lathe machining, the tailstock center plays a crucial role in ensuring the machining accuracy of the workpiece. During machining, it, along with the spindle, restricts the degrees of freedom of the machined part and also helps to center the workpiece. There are two types of centers: fixed centers and rotating centers. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the shortcomings of the existing technology, this utility model provides a high-precision tailstock dead center structure for CNC lathes.

[0005] Technical solution: A high-precision tailstock dead center structure for CNC lathes, comprising: tailstock body, front flange, dust seal, tailstock sleeve, tensioning sleeve, tailstock spindle, first angular contact ball bearing, first precision lock nut, bearing cover, second angular contact ball bearing and second precision lock nut.

[0006] The first precision locking nut secures the first angular contact ball bearing to the front end of the tailstock spindle;

[0007] The second precision locking nut secures the second angular contact ball bearing to the rear end of the tailstock spindle;

[0008] The bearing cap fixes the tailstock spindle inside the tailstock sleeve;

[0009] The tailstock sleeve is fixed inside the tailstock body by a front flange, a dust seal, and a tensioning sleeve.

[0010] As an optimization: there are two second angular contact ball bearings.

[0011] As an optimization: there are 3 first angular contact ball bearings.

[0012] As an optimization: the center of the high-precision tailstock dead center structure of the CNC lathe is fixed in the tailstock spindle.

[0013] Beneficial effects: The specific advantages of this utility model are as follows:

[0014] 1. High rigidity: The high strength of the tailstock body and the support of the tailstock spindle of this utility model give the entire tip structure extremely high rigidity, which can effectively resist the impact of cutting force and ensure the machining accuracy of the workpiece.

[0015] 2. High precision: The high-precision fit of the center guide sleeve of this utility model ensures the precise fit between the workpiece center hole and the center, thereby improving the installation accuracy and machining accuracy of the workpiece.

[0016] 3. Good wear resistance: The tip body and tailstock mandrel of this utility model are made of materials with good wear resistance, which can effectively reduce wear, extend the service life of the tip, and reduce production costs.

[0017] 4. Dustproof and waterproof: The structure of the tensioning sleeve dustproof ring and the front flange of this utility model can prevent water and dust from entering the sleeve. The tailstock mandrel and bearing cover return structure can effectively prevent water mist and cutting debris from entering the interior. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the top structure of this utility model. Detailed Implementation

[0020] Example

[0021] like Figure 1 As shown, a high-precision tailstock dead center structure for a CNC lathe includes: a tailstock body 1, a front flange 2, a dustproof ring 3, a tailstock sleeve 4, a tensioning sleeve 5, a tailstock spindle 6, a first angular contact ball bearing 7, a first precision locking nut 8, a bearing cover 9, a second angular contact ball bearing 10, and a second precision locking nut 11.

[0022] The first precision locking nut 8 secures three first angular contact ball bearings 7 to the front end of the tailstock spindle 6. The second precision locking nut 11 secures two second angular contact ball bearings 10 to the rear end of the tailstock spindle 6. The bearing cap 9 secures the tailstock spindle 6 within the tailstock sleeve 4. The tailstock sleeve 4 is secured within the tailstock body 1 via the front flange 2, dust ring 3, and tensioning sleeve 5. The center of the tailstock dead center structure is fixed within the tailstock spindle 6.

[0023] The tailstock dead center structure of this utility model adopts a three-bearing front and two-bearing rear configuration. The three front bearings are the main support bearings, and the two rear bearings are the auxiliary support bearings. The tailstock body is made of high-strength cast iron and undergoes aging treatment.

[0024] The working principle of this embodiment is as follows: Before machining on the lathe, the workpiece is mounted on the lathe chuck, and the tailstock is moved to the workpiece, such as... Figure 2 As shown, the center body of the tailstock dead center structure is inserted into the center hole of the workpiece. When the lathe is started, the spindle drives the workpiece to rotate, and the tailstock dead center structure rotates synchronously. Due to the high-precision fit between the center and the tailstock mandrel, it can effectively resist the impact of cutting forces, maintain the stability of the workpiece, and prevent vibration and deformation. At the same time, the high-precision center body and tailstock mandrel ensure the precise fit between the workpiece center hole and the center, thereby improving the workpiece's installation and machining accuracy.

[0025] The foregoing description clearly and completely illustrates the technical solutions in the embodiments of this utility model, enabling those skilled in the art to better understand the advantages and features of this utility model, thereby providing a clearer definition of the scope of protection of this utility model. The embodiments described in this utility model are merely some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

Claims

1. A high-precision tailstock dead center structure for a CNC lathe, characterized in that: include: Tailstock body (1), front flange (2), dust ring (3), tailstock sleeve (4), tensioning sleeve (5), tailstock spindle (6), first angular contact ball bearing (7), first precision lock nut (8), bearing cover (9), second angular contact ball bearing (10), and second precision lock nut (11); The first precision locking nut (8) fixes the first angular contact ball bearing (7) to the front end of the tailstock spindle (6); The second precision locking nut (11) fixes the second angular contact ball bearing (10) to the rear end of the tailstock spindle (6); The bearing cap (9) fixes the tailstock spindle (6) in the tailstock sleeve (4); The tailstock sleeve (4) is fixed inside the tailstock body (1) by the front flange (2), dust ring (3) and tensioning sleeve (5).

2. The high-precision tailstock dead center structure for CNC lathes according to claim 1, characterized in that: There are two second angular contact ball bearings (10).

3. The high-precision tailstock dead center structure for CNC lathes according to claim 1, characterized in that: There are three of the first angular contact ball bearings (7).

4. The high-precision tailstock dead center structure for CNC lathes according to claim 1, characterized in that: The center of the high-precision tailstock dead center structure of the CNC lathe is fixed in the tailstock spindle (6).

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