Middle-drive numerical control double-end lathe

Abstract

The utility model discloses a medium-drive numerical control double-end lathe, and belongs to the lathe assembling technology. The lathe comprises a lathe base, a sliding table is arranged on the lathe base, clamping seats used for clamping bars are symmetrically arranged at the two ends of the sliding table, and a floating supporting device used for assisting feeding is further arranged on the sliding table; the machine tool base controls the clamping base to move through the lead screw module, the lead screw module comprises a sliding table and a sliding plate, and the sliding plate moves on the sliding table and is provided with a servo motor for control. A clamping seat, a tool rest, a push rod assembly and a tailstock are arranged on the sliding plate, the tailstock comprises a dovetail sliding seat and a dovetail sliding table, the dovetail sliding seat is fixed on the sliding plate, and the dovetail sliding table is controlled by a second air cylinder to move on the dovetail sliding seat; a push rod assembly is arranged based on the dovetail sliding table and comprises a first air cylinder, and the first air cylinder controls telescopic movement of a push rod and is used for limiting and fixing the end of the bar located in the clamping base.

Description

Technical Field

[0001] The utility model belongs to a mechanical processing machine tool, in particular to a mid-drive CNC double-head lathe. Background Art

[0002] A lathe is a machine tool that mainly uses a turning tool to turn a rotating workpiece. Drills, reamer drills, reamers, taps, dies and knurling tools can also be used on a lathe for corresponding processing. The difference between a double-head lathe and a traditional lathe is that it can turn products on both sides of the workpiece at the same time.

[0003] When using a lathe to process a workpiece, the workpiece is usually placed on an intermediate drive, which clamps the workpiece and drives it to rotate, so that the double-head lathe can process the workpiece.

[0004] When the intermediate drive drives the workpiece to rotate at high speed, the end of the workpiece may shake during the rotation, and then when the machining tool contacts the two ends of the workpiece, the machining accuracy of the workpiece by the machining tool will be reduced, and the end of the workpiece may be poorly machined. Utility Model Content

[0005] Purpose of the utility model: The utility model aims to provide a medium-drive CNC double-head lathe, which can improve stability compared with the existing ones, including support for long bar processing.

[0006] Technical solution: A mid-drive CNC double-head lathe, comprising a machine tool base, wherein the machine tool base is provided with a slide, and clamping seats for clamping bars are symmetrically arranged at both ends of the slide, and a floating support device for auxiliary loading is also arranged on the slide;

[0007] The machine tool base controls the movement of the clamping seat through a screw module. The screw module on the machine tool base includes a slide table and a slide plate. The slide plate moves on the slide table and is provided with a servo motor for control.

[0008] The slide plate is provided with a clamping seat, a tool holder, a push rod assembly and a tail seat, the tail seat includes a dovetail slide and a dovetail slide table, the dovetail slide is fixed on the slide plate, and the dovetail slide table is controlled to move on the dovetail slide by a second cylinder;

[0009] A push rod assembly is arranged based on the dovetail slide, and the push rod assembly comprises a first cylinder, and the first cylinder controls the telescopic movement of the push rod, and is used for limiting and fixing the end of the bar material located in the clamping seat.

[0010] In the above-mentioned lathe mechanism, the screw module includes a slide rail and a slider, the slider is driven by a screw, and the screw is driven to rotate by a motor.

[0011] Furthermore, the push rod assembly also includes a screw module, and the sliding cover plate is fixed by a slider located in the screw module, and the push rod and the first cylinder are arranged on the sliding cover plate.

[0012] The floating support device includes a slide seat, which can move along the slide; a mounting frame is arranged on the slide seat, a driving mechanism is arranged in the middle of the mounting frame, and the driving mechanism is used to control the lifting and lowering of the guide wheel frame; a guide wheel is arranged on the guide wheel frame, and a guide column is arranged between the driving mechanism and the guide wheel frame.

[0013] Furthermore, the guide wheel is configured in a V-shape or a U-shape, and the surface in contact with the surface of the rod is provided with balls, which are used to enable the rod to move horizontally on the floating support device or rotate under the action of the clamping seat.

[0014] The guide column is fixed at only one end, and the guide column is fixed to the guide wheel frame or the mounting frame.

[0015] Beneficial effects: Compared with the prior art, the lathe provided by the utility model adopts a double clamp seat, and the clamp seat is integrated with the tool holder, push rod assembly and tailstock. Because the utility model adopts a double clamp seat and adopts a mid-drive, the assembly accuracy and linearity requirements are very high, otherwise the two clamp seats are prone to distortion or low processing accuracy when clamping and rotating the bar material. The utility model adopts a modular integrated installation and then assembles on the machine tool base for easy calibration. Secondly, the existing floating support frames are basically auxiliary loading. The clamp seat will drop and retract after being fixed. However, for some long-axis bars (soft metal or wood), there may be certain deformation or distortion under high-speed rotation, especially in the middle. For this situation, the utility model can use a floating support device for auxiliary support, and the balls distributed on the surface of the guide wheel can achieve support without affecting lateral or axial rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the lathe described in the utility model;

[0017] Figure 2 It is a schematic diagram of the sliding structure of the screw rod module;

[0018] Figure 3 It is a structural schematic diagram of one end portion of the lathe of the utility model;

[0019] Figure 4 is a schematic diagram of the structure of a floating support device;

[0020] Figure 5 It is a schematic diagram of the structure of the push rod assembly;

[0021] Figure 6 It is a schematic diagram of the installation structure of the push rod assembly and the screw module. DETAILED DESCRIPTION

[0022] In order to explain the technical solution disclosed by the utility model in detail, a further introduction is given below in conjunction with the accompanying drawings of the specification.

[0023] First, if Figure 1-6 As shown, a medium-drive CNC double-head lathe provided by the utility model includes a machine tool base 1, on which a slide 101 is arranged, and the slide 101 is used to install a slide plate 102. The slide plate 102 includes left and right ends arranged at the machine tool base 1, and a clamping base 2, a tool holder 4 and a push rod assembly 5, and a tailstock 6 are modularly integrated on the slide plate 102. The specific arrangement of the above-mentioned mechanism is further explained as follows.

[0024] The utility model relates to the application of the screw rod module, the structure of the screw rod module can be combined with Figure 2 As shown, the screw module mainly includes a slide rail 100, a slider 200 and a motor 300 for driving the slider to move. The motor 300 controls the rotation of the screw, thereby moving the slider 200. In some other embodiments, the motor 300 can be arranged on the slider 200, and the slider 200 is connected with a bearing, and the inner ring of the bearing is provided with a thread and a gear located on the outside. The motor 300 is meshed with the gear on the outer ring of the bearing, and then rotates to achieve walking.

[0025] Figure 3 The structure of one side of the lathe described in the utility model is shown. The lathe can be arranged in a symmetrical manner. Based on the slide 101 on the machine tool base 1, a slide plate 102 is arranged. The slide plate 102 can slide through the sliders fixed on the two sets of slide rails and improve its stability. The slide plate 102 and the slider connected and fixed are controlled by the servo motor at the end. On the slide plate 102, a tailstock 6 is arranged. The tailstock 6 is also a group of slidable mechanisms, including a dovetail slide fixed on the slide plate 102. A dovetail slide 601 is arranged based on the dovetail slide, and driven by the second cylinder 602 arranged at the end. Specifically, the rotation of the second cylinder 602 drives the internal screw rod to rotate, and the rotation of the screw rod controls the movement of the dovetail slide 601 arranged thereon. The rotation of the screw rod can be fixed on the base where the slide rail is located through the bearing seat and the bearing. This is a technical means known to those skilled in the art. The utility model adopts a dovetail mechanism to improve the stability of the push rod assembly 5 during the longitudinal movement (with the moving direction of the dovetail slide 601 on the tailstock 6 as the horizontal direction).

[0026] Further integration Figure 5 and Figure 6 , Figure 6The structure diagram of the push rod assembly 5 on the dovetail slide 601 is shown, which can be understood as a superimposed arrangement. The push rod assembly 5 is used to abut the bar material in the clamp seat 2. The push rod assembly 5 includes a push rod cylinder and a push rod 503 located in the push rod cylinder. The push rod cylinder is fixed on the screw module 504 and connected and fixed to the slidable sliding cover plate 501. Similarly, a driving mechanism is provided, and the driving structure can be a cylinder, an electric cylinder or an oil cylinder. The push rod 503 is provided with a first cylinder 502 to control its extension and contraction. In addition, the end of the push rod 503 includes a turntable or a bearing, and the turntable or the rotating head directly abuts against the end of the workpiece, and the head rotation installation can be realized through the bearing.

[0027] The clamping seats 2 are symmetrically arranged at both ends of the machine tool base 1 mentioned above in the utility model. Both ends can be moved by the above-mentioned method. It can also be fixed after debugging, and the linear alignment and collimation verification work of the fixed end can be coordinated by moving the other end.

[0028] On the other hand, the utility model further provides a floating support device 3 on the slide 101, including a slide 301, which can move along the slide 101; a mounting frame 302 is provided on the slide 301, and a driving mechanism 306 is provided in the middle of the mounting frame 302, and the driving mechanism 306 is used to control the lifting and lowering of the guide wheel frame 303, and the guide wheel frame 303 is provided with a guide wheel 304, and a guide column 305 is provided between the driving mechanism 306 and the guide wheel frame 303. Similarly, the driving mechanism includes an electric, pneumatic or hydraulic device. For the guide wheel 304 mentioned above, combined with Figure 1 , Figure 4 It can be seen from the figure that it is an arc surface formed by two conical surfaces relative to each other (which can be understood as a U-shaped or V-shaped state). The guide wheel 304 is fixed on the guide wheel frame 303 through the bearing at the end, so when supporting the cylindrical workpiece or plate bar, it can move horizontally, so that the two ends of the bar can be inserted into the clamping seat 2 one by one for fixation. The middle part of the clamping seat 2 is a hydraulic chuck to achieve the clamping of the workpiece. The existing left and right floating support frames are generally lowered and recovered after the workpiece is fixed. This belongs to the conventional processing needs. However, for soft metal parts or wood, the long-axis (extra-long) workpiece is easy to bend due to the effect of gravity during the initial processing. Therefore, the floating support device 3 provided by the utility model can provide support for this situation. It is achieved by embedding a number of balls on the guide wheel 304, thereby realizing the rotation support of the long-axis workpiece during the initial processing.

[0029] The lathe provided by the utility model has the same symmetrical structure at both ends of the machine tool base 1, which can be both sliding settings, or they can be fixed after the setting is completed, and then the movable end can be adjusted to complete the processing of the workpiece (bar, barrel, cylinder, column, etc.).

Claims

1. A medium-drive CNC double-head lathe, comprising a machine tool base (1), characterized in that: The machine tool base (1) is provided with a slide (101), and clamping seats (2) for clamping rods are symmetrically arranged at both ends of the slide (101), and a floating support device (3) for assisting material loading is also arranged on the slide (101); The machine tool base (1) controls the movement of the clamping seat (2) through a screw module, the screw module on the machine tool base (1) comprises a slide table (101) and a slide plate (102), the slide plate (102) moves on the slide table (101) and is provided with a servo motor for control; Based on the slide plate (102), a clamping seat (2), a tool holder (4), a push rod assembly (5) and a tailstock (6) are provided, and the tailstock (6) includes a dovetail slide and a dovetail slide table (601), wherein the dovetail slide is fixed on the slide plate (102), and the dovetail slide table (601) is controlled to move on the dovetail slide by the second cylinder (602); A push rod assembly (5) is arranged based on the dovetail slide (601), and the push rod assembly (5) includes a first cylinder (502), and the first cylinder (502) controls the telescopic movement of the push rod (503) to limit and fix the end of the rod located in the clamping seat (2).

2. The mid-drive CNC double-head lathe according to claim 1, characterized in that: The screw module comprises a slide rail (100) and a slider (200); the slider (200) is driven by a screw, and the screw is driven to rotate by a motor (300).

3. The middle drive CNC double-head lathe according to claim 1, characterized in that: The push rod assembly (5) also includes a screw module (504), and the sliding cover plate (501) is fixed by a slider located in the screw module (504). The push rod (503) and the first cylinder (502) are arranged on the sliding cover plate (501).

4. The middle drive CNC double-head lathe according to claim 1, characterized in that: The floating support device (3) includes a slide seat (301) which can move along the slide table (101); a mounting frame (302) is arranged on the slide seat (301); a driving mechanism (306) is arranged in the middle of the mounting frame (302); the driving mechanism (306) is used to control the lifting and lowering of the guide wheel frame (303); a guide wheel (304) is arranged on the guide wheel frame (303); and a guide column (305) is arranged between the driving mechanism (306) and the guide wheel frame (303).

5. The middle drive CNC double-head lathe according to claim 4, characterized in that: The guide wheel (304) is configured in a V-shape or a U-shape, and the surface in contact with the surface of the bar is provided with a ball, which is used to enable the bar to move horizontally on the floating support device (3) or rotate under the action of the clamping seat.

6. The middle drive CNC double-head lathe according to claim 4, characterized in that: The guide column (305) is fixed at only one end, and the guide column (305) is fixed to the guide wheel frame (303) or the mounting frame (302).

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