Numerical control lathe special for chamfering of flat end face of hydraulic cylinder body

Abstract

The utility model relates to the technical field of numerical control lathes, in particular to a special numerical control lathe for chamfering a flat end face of a hydraulic cylinder, which comprises a lathe body, two parallel horizontal guide rails are fixed above the lathe body, a first spindle box is fixed at one end above the lathe body, and a first chuck is mounted on the first spindle box. A second spindle box is installed on the horizontal guide rail in a sliding mode, a second chuck is fixed to the side, facing the first spindle box, of the second spindle box, and the two ends of a workpiece are fixed through the first chuck and the second chuck which can be supported on the inner wall of the workpiece. The chamfering device has the beneficial effects that by arranging the two spindle boxes and the two chucks, the inner wall of a pipe fitting can be directly supported and fixed when the pipe-shaped workpiece is clamped and fixed, the machining position is reserved, the end face of the pipe-shaped workpiece can be conveniently and rapidly chamfered, head replacement for fixing is not needed in the machining process, and the machining precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe technology, and in particular to a special CNC lathe for chamfering the flat end face of a hydraulic cylinder. Background Technology

[0002] In the manufacturing process of hydraulic cylinders, chamfering the outer end face at a 45° angle is a crucial step. This design not only optimizes the cylinder's structural form but also greatly facilitates subsequent assembly and welding processes, ensuring the overall stability and sealing of the equipment. However, the current lathe configuration has limitations, specifically being equipped with only a spindle box with a chuck and a tailstock with a center point. In actual operation, one end of the cylinder needs to be tightly clamped to its outer wall by the chuck, while the other end needs to be securely supported by the center point of the tailstock extending deep into the cylinder. Although this fixing method can meet basic processing requirements to some extent, when performing double-end chamfering, after chamfering one end, the cylinder needs to be removed and its fixing direction changed before chamfering the other end. The coaxiality of the cylinder during processing is difficult to guarantee effectively, thus having a significant impact on processing accuracy. This deviation in accuracy may not only reduce the cylinder's performance but also create potential problems for subsequent installation and use. Utility Model Content

[0003] This utility model is designed to solve the above-mentioned problems by proposing a special CNC lathe for chamfering the flat end face of a hydraulic cylinder.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A CNC lathe for chamfering the flat end face of a hydraulic cylinder includes a bed, two parallel horizontal guide rails fixed above the bed, a first spindle box fixed at one end of the bed, a first chuck mounted on the first spindle box, a second spindle box slidably mounted on the horizontal guide rails, and a second chuck fixed on the side of the second spindle box facing the first spindle box. The two ends of the workpiece are fixed by the first chuck and the second chuck, which can be supported on the inner wall of the workpiece.

[0006] Furthermore, both the first chuck and the second chuck are hydraulic chucks.

[0007] Furthermore, a drive mechanism is fixed on one side of the bed to drive the second spindle box to move horizontally along the horizontal guide rail.

[0008] Furthermore, the drive mechanism includes a rack and a fixing plate. The rack is fixed below one of the horizontal guide rails by bolts and is arranged parallel to the horizontal guide rail. The fixing plate is fixed on one side wall of the second spindle box. A right-angle reducer is fixed on the fixing plate. A geared motor is fixed at the power input end of the right-angle reducer. A gear that meshes with the rack is fixed at the power output end of the right-angle reducer.

[0009] Furthermore, the horizontal guide rail is a V-shaped guide rail, and a plastic template is attached to the surface of the horizontal guide rail.

[0010] Furthermore, a machining mechanism for machining the workpiece is fixed on one side of the bed. The machining mechanism includes a ball screw fixed on one side of the bed using a bearing seat. A tool drive motor is fixed at one end of the bed. The tool drive motor is connected to the ball screw via a coupling. A tool fixing mechanism for mounting turning tools is fixed on the ball sleeve of the ball screw. The tool fixing mechanism is slidably mounted on the horizontal guide rail.

[0011] The beneficial effects of this utility model by adopting the above technical solution are as follows: by setting two spindle boxes and two chucks, the inner wall of the tubular workpiece can be directly supported and fixed when clamping and fixing the tubular workpiece, making room for processing and facilitating the quick chamfering of the end face of the tubular workpiece. There is no need to change the head during the processing, which ensures the processing accuracy. The second spindle box is driven by a gear and rack, which can realize the transformation of the old machine tool without changing the original bed structure, and can ensure the guiding accuracy of the movement of the second spindle box, improving the coaxiality of the tubular workpiece processing. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is the front view of this utility model;

[0014] Figure 2 This is a side sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the rack installation position of this utility model.

[0016] The annotations in the attached figures are explained as follows:

[0017] 1. Bed; 2. First spindle box; 3. Second spindle box; 4. First chuck; 5. Second chuck; 6. Horizontal guide rail; 7. Drive mechanism; 71. Fixed plate; 72. Right angle reducer; 73. Gear motor; 74. Gear; 75. Rack; 8. Workpiece; 9. Machining mechanism; 91. Ball screw; 92. Tool drive mechanism; 93. Tool fixing mechanism. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1-3 As shown, a CNC lathe for chamfering the flat end face of a hydraulic cylinder includes a bed 1. Two parallel horizontal guide rails 6 are fixed above the bed 1. A first spindle box 2 is fixed at one end of the bed 1. A first chuck 4 is mounted on the first spindle box 2. A second spindle box 3 is slidably mounted on the horizontal guide rails 6. A second chuck 5 is fixed on the side of the second spindle box 3 facing the first spindle box 2. The two ends of a workpiece 8 are fixed using the first chuck 4 and the second chuck 5, which can be supported on the inner wall of the workpiece 8. Both the first chuck 4 and the second chuck 5 are hydraulic chucks, which can quickly fix the workpiece 8. When fixing the hydraulic cylinder, the first chuck 4 and the second chuck 5 can be respectively clamped on the inner wall of the hydraulic cylinder so that the outer wall is exposed, which is convenient for using a machining mechanism to chamfer the two ends of the hydraulic cylinder without repeatedly disassembling the workpiece, thus avoiding the need to affect the machining accuracy.

[0020] In this embodiment, a drive mechanism 7 is fixed on one side of the bed 1 to drive the second spindle box 3 to move horizontally along the horizontal guide rail 6. The drive mechanism 7 includes a rack 75 and a fixing plate 71. The rack 75 is fixed below one of the horizontal guide rails 6 by bolts and is arranged parallel to the horizontal guide rail 6. The fixing plate 71 is fixed on one side wall of the second spindle box 3. A right-angle reducer 72 is fixed on the fixing plate 71. A geared motor 73 is fixed at the power input end of the right-angle reducer 72. A gear 74 that meshes with the rack 75 is fixed at the power output end of the right-angle reducer 72. The drive mechanism 7 can be directly installed on an existing machine tool to realize the transformation of the existing old machine tool. Moreover, the gear and rack transmission method can ensure that there will be no crawling phenomenon when moving. The geared motor 73 adopts a VRBR120 right-angle reducer with a speed ratio of 1:20.

[0021] In this embodiment, the horizontal guide rail 6 is a V-shaped guide rail, and a plastic template is attached to the surface of the horizontal guide rail 6. This structure adopts the mountain-level guide rail plastic coating process, which can improve the guiding accuracy of the movement of the second spindle box 3. When the second spindle box 3 moves, it will not change the coaxiality of the first spindle box 2 and the second spindle box 3. At the same time, this structure makes the movement structure of the second spindle box 3 of the horizontal lathe more compact, the braking performance reliable, and greatly reduces the manufacturing cost of the machine tool.

[0022] In this embodiment, a machining mechanism 9 for machining workpiece 8 is fixed on one side of the bed 1. The machining mechanism 9 includes a ball screw fixed on one side of the bed 1 by means of a bearing seat. A tool drive motor is fixed at one end of the bed 1. The tool drive motor is connected to the ball screw 91 through a coupling. A tool fixing mechanism 93 for mounting turning tools is fixed on the ball sleeve of the ball screw 91. The tool fixing mechanism 93 is slidably mounted on the horizontal guide rail 6.

[0023] The working principle of this utility model is as follows: When in use, one end of the workpiece 8 is placed outside the jaws of the first chuck 4, and then the other end of the workpiece 8 is lifted. The second spindle box 3 is pushed close to the other end of the workpiece 8 by manual force or drive mechanism 7, so that the jaws of the second chuck 5 are inserted into the inner cavity of the end of the workpiece 8. The first chuck 4 and the second chuck 5 are activated to tighten the workpiece 8 and complete the fixation of the workpiece 8. Then, the end faces of both ends of the workpiece 8 are chamfered by the processing mechanism 9.

[0024] The circuit connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0025] Components not described in detail in this article are existing technologies.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A CNC lathe for chamfering the flat end face of a hydraulic cylinder, comprising a bed (1), two parallel horizontal guide rails (6) fixed above the bed (1), a first spindle box (2) fixed at one end above the bed (1), and a first chuck (4) mounted on the first spindle box (2), characterized in that: A second spindle box (3) is slidably mounted on the horizontal guide rail (6). A second chuck (5) is fixed on the side of the second spindle box (3) facing the first spindle box (2). The two ends of the workpiece (8) are fixed by the first chuck (4) and the second chuck (5) which can be supported on the inner wall of the workpiece (8). A drive mechanism (7) is fixed on one side of the bed (1) to drive the second spindle box (3) to move horizontally along the horizontal guide rail (6). The drive mechanism (7) includes a rack (75) and a fixing plate (71). The rack (75) is fixed below one of the horizontal guide rails (6) by bolts and is arranged parallel to the horizontal guide rail (6). The fixing plate (71) is fixed on one side wall of the second spindle box (3). A right-angle reducer (72) is fixed on the fixing plate (71). A geared motor (73) is fixed at the power input end of the right-angle reducer (72). A gear (74) that meshes with the rack (75) is fixed at the power output end of the right-angle reducer (72).

2. The hydraulic cylinder body flat end face chamfering special purpose CNC lathe according to claim 1, characterized in that: Both the first chuck (4) and the second chuck (5) are hydraulic chucks.

3. The hydraulic cylinder body flat end face chamfering special purpose CNC lathe according to claim 1, characterized in that: The horizontal guide rail (6) is a V-shaped guide rail, and a plastic template is attached to the surface of the horizontal guide rail (6).

4. The hydraulic cylinder body flat end face chamfering special purpose CNC lathe according to claim 1, characterized in that: A machining mechanism (9) for machining the workpiece (8) is fixed on one side of the bed (1). The machining mechanism (9) includes a ball screw (91) fixed on one side of the bed (1) by means of a bearing seat. A tool drive motor is fixed at one end of the bed (1). The tool drive motor is connected to the ball screw (91) through a coupling. A tool fixing mechanism (93) for mounting turning tools is fixed on the ball sleeve of the ball screw (91). The tool fixing mechanism (93) is slidably mounted on the horizontal guide rail (6).

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