Inverted lathe for machining shaft parts

Abstract

The invention relates to the technical field of machining, in particular to an inverted lathe for machining shaft parts. The hydraulic chuck clamps the upper end of a workpiece under the action of the hydraulic oil cylinder, the position of the center sliding plate is adjusted through the center Z-direction guide rail according to the length of the workpiece, the hydraulic station works, the hydraulic center moves upwards to abut against and fix the workpiece, and the rear motorized spindle drives the spindle unit to drive the workpiece to rotate for turning. The Z-axis servo motor drives the sliding saddle to move on the Z-axis guide rail in the Z-axis direction through the Z-axis lead screw, the X-axis servo motor drives the sliding plate to move on the X-axis guide rail in the X-axis direction through the X-axis lead screw, the servo tool turret is driven to move in the Z-axis direction and the X-axis direction, the servo tool turret is matched with the rotating main shaft unit on the other side, and workpiece turning is completed. The rear motor type motorized spindle design is adopted, so that belt conveying loss is reduced; the integrated lathe bed design is adopted, so that the part machining precision is higher and more stable; the lathe is small in occupied area, and equipment layout is easier and more flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to an inverted lathe for processing shaft parts. Background Art

[0002] In the field of mechanical processing, lathes are one of the primary machines used for machining shaft parts. Traditional lathes rely on belt drive systems for their spindle drive. These belts are susceptible to wear and loosening over time, resulting in reduced transmission efficiency and increased belt transmission losses. Furthermore, most lathes utilize a split-bed design, which lacks rigidity and makes it difficult to meet the demands of high-precision machining. Furthermore, the equipment occupies a large space, requiring a high installation site and limiting the flexibility of equipment layout. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the existing technology and propose an inverted lathe for processing shaft parts. Through the rear-mounted motor-type electric spindle, integrated bed and compact layout, it can adapt to the processing of shaft parts with a diameter of less than 200mm and a length between 200mm-800mm.

[0004] To achieve the above objectives, the present invention adopts the following specific technical solutions:

[0005] The inverted lathe for machining shaft parts provided by the present invention comprises a bed, a spindle unit, a rear electric spindle, a chuck, a top Z guide rail, a top slide, a top, a Z-axis guide rail, a Z-axis lead screw, a saddle, an X-axis guide rail, an X-axis lead screw, a slide, a servo turret, a Z-axis servo motor, and an X-axis servo motor;

[0006] The spindle unit is mounted on the bed. The spindle unit is equipped with a chuck for clamping the workpiece. The center Z guide rail is fixedly mounted on the bed. The center is mounted on a center slide. The center slide is connected to the center Z guide rail to enable the center to move along the Z axis and cooperate with the chuck to fix the workpiece. The rear electric spindle is used to drive the spindle unit to drive the workpiece to rotate for turning processing.

[0007] The Z-axis guide rail is installed on the bed and connected to the saddle through the Z-axis lead screw. The X-axis guide rail is installed on the saddle and connected to the slide through the X-axis lead screw. The servo turret is installed on the slide.

[0008] The Z-axis servo motor drives the saddle to move along the Z-axis direction, and the X-axis servo motor drives the slide to move along the X-axis direction. They are used to control the servo turret to move along the Z-axis and X-axis directions, and cooperate with the spindle unit to complete workpiece turning.

[0009] Preferably, the chuck is a hydraulic chuck, which is controlled by a hydraulic cylinder to clamp the workpiece, and the center is a hydraulic center, which is controlled by a hydraulic station set on the bed to fix the workpiece.

[0010] The present invention can achieve the following technical effects:

[0011] The inverted lathe for processing shaft parts provided by the present invention adopts a rear-mounted motor-type electric spindle design to reduce belt transmission loss; an integrated bed design is adopted to make the parts processing accuracy higher and more stable; the lathe of the present invention occupies a small area and the equipment layout is easier and more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an inverted lathe for processing shaft parts provided according to an embodiment of the present invention.

[0013] Reference numerals include:

[0014] Bed 1, spindle unit 2, rear electric spindle 3, chuck 4, center Z-axis guide rail 5, center slide 6, center 7, Z-axis guide rail 8, Z-axis lead screw 9, slide saddle 10, X-axis guide rail 11, X-axis lead screw 12, slide 13, servo turret 14, Z-axis servo motor 15, X-axis servo motor 16, hydraulic cylinder 17, hydraulic station 18. DETAILED DESCRIPTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, identical modules are denoted by identical reference numerals. In the case of identical reference numerals, their names and functions are also identical. Therefore, their detailed description will not be repeated.

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0017] The embodiment of the present invention provides an inverted lathe for machining shaft parts, the structure of which is as follows: Figure 1 As shown, it includes a bed 1, a spindle unit 2, a rear electric spindle 3, a chuck 4, a top Z-direction guide rail 5, a top slide 6, a top 7, a Z-axis guide rail 8, a Z-axis lead screw 9, a slide 10, an X-axis guide rail 11, an X-axis lead screw 12, a slide 13, a servo turret 14, a Z-axis servo motor 15, an X-axis servo motor 16, a hydraulic cylinder 17, and a hydraulic station 18.

[0018] The spindle unit 2 is installed on the bed 1. The spindle unit 2 is provided with a chuck 4 for clamping the workpiece. The center Z guide rail 5 is fixedly installed on the bed 1. The center 7 is installed on the center slide 6. The center slide 6 is connected to the center Z guide rail 5 and is used to make the center 7 move along the Z-axis direction and cooperate with the chuck 4 to fix the workpiece; the rear electric spindle 3 is used to drive the spindle unit 2 to move for turning processing.

[0019] The Z-axis guide rail 8 is installed on the bed 1 and is connected to the slide saddle 10 through the Z-axis screw 9. The X-axis guide rail 11 is installed on the slide saddle 10 and is connected to the slide plate 13 through the X-axis screw 12. A servo turret 14 is installed on the slide plate 13.

[0020] The Z-axis servo motor 15 drives the saddle 10 to move along the Z-axis direction, and the X-axis servo motor 16 drives the slide plate 13 to move along the X-axis direction, which is used to control the servo turret 14 to move along the Z-axis and X-axis directions, and cooperate with the spindle unit 2 to complete the workpiece turning.

[0021] In a preferred embodiment, the chuck 4 is a hydraulic chuck, which is controlled by a hydraulic cylinder 17 to clamp the workpiece, and the center 7 is a hydraulic center, which is controlled by a hydraulic station 18 provided on the bed 1 to fix the workpiece.

[0022] When the lathe is working, the hydraulic chuck clamps the upper end of the workpiece through the action of the hydraulic cylinder 17. The position of the top slide 6 is adjusted through the top Z guide rail 5 according to the length of the workpiece. The hydraulic top has a 50mm stroke. After adjusting the position, the position of the top slide 6 is fixed. The hydraulic station 18 works, and the hydraulic top moves upward to support and fix the workpiece. The rear electric spindle 3 drives the spindle unit 2 to drive the workpiece to rotate for turning processing.

[0023] The Z-axis servo motor 15 drives the slide 10 to move along the Z-axis direction on the Z-axis guide rail 8 through the Z-axis screw 9, driving the servo turret 14 to move up and down along the Z-axis direction; the X-axis servo motor 16 drives the slide 13 to move along the X-axis direction on the X-axis guide rail 11 through the X-axis screw 12, driving the servo turret 14 to move left and right along the X-axis direction. The tool holder and tool rod installed on the servo turret 14 cooperate with the rotating spindle unit 2 on the other side to complete the workpiece turning.

[0024] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0025] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0026] The above specific embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. An inverted lathe for machining shaft parts, characterized in that: It includes a bed (1), a spindle unit (2), a rear electric spindle (3), a chuck (4), a top Z-axis guide rail (5), a top slide (6), a top (7), a Z-axis guide rail (8), a Z-axis lead screw (9), a slide saddle (10), an X-axis guide rail (11), an X-axis lead screw (12), a slide (13), a servo turret (14), a Z-axis servo motor (15), and an X-axis servo motor (16); A spindle unit (2) is mounted on a bed (1), and a chuck (4) is provided on the spindle unit (2) for clamping a workpiece. A top Z-direction guide rail (5) is fixedly mounted on the bed (1), and a top (7) is mounted on a top slide (6). The top slide (6) is connected to the top Z-direction guide rail (5) and is used to move the top (7) along the Z-axis direction and cooperate with the chuck (4) to fix the workpiece. A rear electric spindle (3) is used to drive the spindle unit (2) to drive the workpiece to rotate for turning processing. The Z-axis guide rail (8) is mounted on the bed (1) and connected to the slide saddle (10) via the Z-axis lead screw (9); the X-axis guide rail (11) is mounted on the slide saddle (10) and connected to the slide plate (13) via the X-axis lead screw (12); and a servo turret (14) is mounted on the slide plate (13); The Z-axis servo motor (15) drives the saddle (10) to move along the Z-axis direction, and the X-axis servo motor (16) drives the slide plate (13) to move along the X-axis direction, and is used to control the servo turret (14) to move along the Z-axis and X-axis directions, and cooperate with the spindle unit (2) to complete the workpiece turning.

2. The inverted lathe for machining shaft parts according to claim 1, characterized in that: The chuck (4) is a hydraulic chuck, which is controlled by a hydraulic cylinder (17) to clamp the workpiece, and the top (7) is a hydraulic top, which is controlled by a hydraulic station (18) arranged on the bed (1) to fix the workpiece.

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