A support device for turning an elongated shaft workpiece

Abstract

The utility model provides a kind of turning slender shaft workpiece supporting device, it is related to slender shaft workpiece turning support technical field, the present application can automatically adjust support wheel spacing when turning support to different diameter slender shaft workpiece, i.e. The utility model discloses a kind of turning slender shaft workpiece supporting device, it is related to slender shaft workpiece turning support technical field, the present application can automatically adjust support wheel spacing when turning support to different diameter slender shaft workpiece, i.e.

Description

Technical Field

[0001] This utility model relates to the field of turning support technology for slender shaft workpieces, and more specifically, to a support device for turning slender shaft workpieces. Background Technology

[0002] In the field of machining, the turning of slender shaft workpieces has always been a technical challenge. Before turning, the slender shaft workpiece is first fixed by a rotatable chuck and an ejector seat. Then, the slender shaft workpiece is moved at a constant speed (specifically, the chuck is connected to a servo motor, and the ejector seat moves closer to / away from the slender shaft workpiece under the action of a telescopic cylinder). Then, the turning process begins. During the turning process, the workpiece is subjected to the combined effects of centrifugal force, cutting force, and its own gravity, which can easily cause problems such as bending deformation and high-frequency vibration (chatter). This directly leads to shape errors such as taper and bulge on the workpiece after machining, or the formation of chatter marks on the surface, which seriously affects dimensional accuracy and surface quality.

[0003] To address this issue, the tool post is widely used as a key auxiliary support device. By moving synchronously with the lathe tool post slide, it provides continuous support from the side or bottom of the workpiece, essentially adding a dynamic auxiliary fulcrum to a slender shaft. This effectively enhances workpiece rigidity, counteracts cutting force impacts, and thus suppresses deformation and vibration.

[0004] However, existing tool holders still have significant limitations, as follows: The spacing between the support wheels of existing turning tool holders is mostly fixed. When machining slender shafts of different diameters, the support components need to be disassembled and manually replaced, which is time-consuming and labor-intensive. In the scenario of machining small batches of slender shafts of various specifications, production efficiency is greatly limited. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a support device for turning slender shaft workpieces.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A support device for turning slender shaft-like workpieces includes a base fixed to the tool post slide of a lathe. Symmetrical welding is done on the base on the U-shaped frame; The support plates are symmetrically welded to the inside of the U-shaped frame; The mounting shell is inserted into the U-shaped frame, and the four support plates contact the four corners of the mounting shell respectively; The fixing bolts are symmetrically arranged on the U-shaped frame and threadedly connected to the mounting shell; The positive and negative lead screws are set inside the mounting housing and are connected to two U-shaped steels that move synchronously toward or away from each other; An elongated hole is provided at the bottom of the mounting housing, and the elongated hole allows the U-shaped steel to pass through and move horizontally; Two first support wheels are rotatably mounted on a U-shaped steel, and a second support wheel is rotatably mounted on another U-shaped steel. The center of the second support wheel and the center of the line connecting the centers of the two first support wheels are on the same straight line.

[0007] Furthermore, the mounting shell is symmetrically provided with T-shaped inserts, and the U-shaped frame is symmetrically provided with T-shaped slots that cooperate with the T-shaped inserts.

[0008] Furthermore, a fan is installed on the base, and the fan is located outside the U-shaped frame and below the bottom of the U-shaped steel.

[0009] Furthermore, the center of the second support roller and the center of the chuck are on the same straight line.

[0010] Furthermore, the support plate and the elongated holes are distributed at intervals.

[0011] Furthermore, both the first and second support wheels are made of metal with a roughness of Ra 0.1~0.4μm.

[0012] Compared with the prior art, the beneficial effects of this utility model are: Compared to existing technologies, this application can automatically adjust the spacing between support wheels when turning slender shaft workpieces of different diameters. That is, by changing the motion range of the lead screw, the three support wheels can be brought back into contact with the surface of the new-sized slender shaft workpiece. At the same time, the mounting shell can be easily removed for maintenance of the support component. This can effectively enhance the rigidity of the workpiece, offset the impact of cutting forces, and thus effectively suppress deformation and vibration. The probability of shape errors such as taper or bulge or surface vibration marks on the slender shaft workpiece after production is greatly reduced, resulting in better turning results. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fan installation. Figure 3 This is a schematic diagram showing the fit between the T-slot and the T-block. Figure label: 1. Base; 2. U-shaped frame; 21. T-shaped slot; 3. Support plate; 4. Mounting shell; 41. T-shaped insert; 5. Fixing bolt; 6. Positive and negative lead screws; 7. U-shaped steel; 8. First support wheel; 9. Second support wheel; 10. Fan. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments: like Figure 1 As shown, a support device for turning slender shaft-like workpieces includes a lathe tool turret slide and a lathe feed system for driving the lathe tool turret slide. Turning tools are mounted on the lathe tool turret slide (these features are not shown in the figure and are all prior art and are not modified). It also includes a base 1 fixed to the lathe tool turret slide. The U-shaped frame 2 is symmetrically welded onto the base 1; The support plate 3 is symmetrically welded to the inner side of the U-shaped frame 2; The mounting shell 4 is inserted into the U-shaped frame 2, and the four support plates 3 are respectively in contact with the four corners of the mounting shell 4; The fixing bolts 5 are symmetrically arranged on the U-shaped frame 2 and are threadedly connected to the mounting shell 4; The positive and negative lead screws 6 are set inside the mounting housing 4 and are connected to two U-shaped steels 7 that move synchronously toward or away from each other; The elongated hole is opened at the bottom of the mounting shell 4, and the elongated hole allows the U-shaped steel 7 to pass through and move horizontally (the elongated hole is not shown in the figure; specifically, the support plate 3 is spaced apart from the elongated hole to avoid the support plate 3 affecting the horizontal movement of the U-shaped steel 7). Two first support wheels 8 are rotatably mounted on a U-shaped steel 7, and a second support wheel 9 is rotatably mounted on another U-shaped steel 7. The center of the second support wheel 9 and the center of the line connecting the centers of the two first support wheels 8 are on the same straight line. Specifically, a rotating shaft is rotatably connected inside the U-shaped steel 7, and the first support wheel 8 / second support wheel 9 are fixed on the rotating shaft. The rotating shaft is not labeled in the figure.

[0015] Specific implementation of this utility model solution, such as Figure 3 As shown, T-shaped inserts 41 are symmetrically arranged on the mounting shell 4, and T-shaped slots 21 that cooperate with the T-shaped inserts 41 are symmetrically opened on the U-shaped frame 2.

[0016] To promptly remove the machining debris accumulated on base 1 and thus prevent excessive debris buildup from affecting machining accuracy, further optimizations to the above-described embodiments are made, such as... Figure 2 As shown, a fan 10 is installed on the base 1. The fan 10 is located outside the U-shaped frame 2 and below the bottom of the U-shaped steel 7.

[0017] In a further optimization of the embodiment of this utility model, both the first support wheel 8 and the second support wheel 9 are made of metal with a roughness of Ra 0.1~0.4μm. When they are precision ground to Ra 0.1~0.2μm, a smooth surface can be formed, reducing the frictional resistance with slender shaft-like workpieces and avoiding scratches on the surface of slender shaft-like workpieces. This can ensure the stability of the support and avoid scratching the surface of the workpiece.

[0018] It should be noted that the servo motor in the forward and reverse lead screw 6 is electrically connected to the PLC control panel, which is specifically installed on the lathe.

[0019] The working process of this utility model is as follows: First, the slender shaft workpiece is fixed and limited by the chuck and the ejector seat (this part is an existing technical means and will not be improved and is not shown in the figure); before turning the slender shaft workpiece, the base 1 and the U-shaped bracket 2 are first installed on the lathe tool post slide and placed on the side of the turning tool. Then, the T-shaped plug 41 on the mounting shell 4 is aligned with the T-shaped slot 21 on the U-shaped bracket 2 and inserted. This can quickly and accurately limit the position of the mounting shell 4, and at the same time avoid the mounting shell 4 from shifting in the horizontal direction. After the T-shaped plug 41 and the bottom surface of the mounting shell 4 are in contact with the support plate 3, the fixing bolt 5 is installed to further limit the position of the mounting shell 4 in the vertical direction. After installation, the center of the second support wheel 9 is exactly on the same plane as the center of the chuck. Driven by the lathe feed system, the two U-shaped steels 7 move to the outer side of one end of the slender shaft workpiece. At the same time, the turning tool also moves synchronously to one end of the slender shaft workpiece. Then, the servo motor of the lead screw 6 is controlled by the PLC control panel to make the first support wheel 8 and the second support wheel 9 simultaneously contact the surface of the slender shaft workpiece. The servo motor connected to the chuck then drives the slender shaft workpiece to rotate at a constant speed. At this time, driven by the lathe feed system, the surface of the slender shaft workpiece can be horizontally moved and circumferentially turned in sequence. During the turning process, the three support wheels are always in contact with different areas of the surface of the slender shaft workpiece without hindering the rotation of the slender shaft workpiece. This adds a dynamic auxiliary support point to the slender shaft, which can effectively enhance the rigidity of the workpiece and offset the impact of the cutting force, thereby effectively suppressing deformation and vibration. The probability of the slender shaft workpiece having shape errors such as taper or waist-shaped after production or the occurrence of surface vibration marks is greatly reduced, resulting in better turning effect. After the support turning of a slender shaft workpiece is completed, it is removed (the lathe tool post slide and ejector seat move away from the workpiece in sequence, and then the workpiece is removed from the chuck). Then, following the above process, slender shaft workpieces of different diameters and lengths can be replaced for the next round of turning. After replacing the workpiece with a different diameter, it is only necessary to move the two U-shaped steels 7 to different areas to effectively support the workpieces of different diameters (the range of motion of the positive and negative lead screws 6 corresponding to different diameter workpieces is pre-tested and set). At the same time, the mounting shell 4 can be easily removed for maintenance of the support components, thus improving the support effect for turning slender shaft workpieces.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A support device for turning slender shaft-like workpieces, characterized in that, Includes a base (1) fixed on the lathe tool post slide. The U-shaped frame (2) is symmetrically welded onto the base (1); The support plate (3) is symmetrically welded to the inside of the U-shaped frame (2); The mounting shell (4) is inserted into the U-shaped frame (2), and the four support plates (3) are respectively in contact with the four corners of the mounting shell (4); The fixing bolts (5) are symmetrically arranged on the U-shaped frame (2) and threadedly connected to the mounting shell (4); The positive and negative lead screws (6) are set inside the mounting shell (4) and the positive and negative lead screws (6) are connected to two U-shaped steels (7) that move synchronously towards or away from each other. An elongated hole is opened at the bottom of the mounting shell (4), and the elongated hole allows the U-shaped steel (7) to pass through and move horizontally; Two first support wheels (8) are rotatably mounted on a U-shaped steel (7), and a second support wheel (9) is rotatably mounted on another U-shaped steel (7). The center of the second support wheel (9) and the center of the line connecting the centers of the two first support wheels (8) are on the same straight line.

2. The support device for turning slender shaft-like workpieces according to claim 1, characterized in that, The mounting shell (4) is symmetrically provided with T-shaped inserts (41), and the U-shaped frame (2) is symmetrically provided with T-shaped slots (21) that cooperate with the T-shaped inserts (41).

3. The support device for turning slender shaft-like workpieces according to claim 1, characterized in that, A fan (10) is provided on the base (1), and the fan (10) is located outside the U-shaped frame (2) and below the bottom of the U-shaped steel (7).

4. The support device for turning slender shaft-like workpieces according to claim 1, characterized in that, The support plate (3) and the elongated holes are distributed at intervals.

5. A support device for turning slender shaft-like workpieces according to claim 1, characterized in that, Both the first support wheel (8) and the second support wheel (9) are made of metal and have a roughness of Ra 0.1~0.4μm.

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