Clamping device for long axis machining

Abstract

The utility model relates to a kind of clamping devices for long shaft processing, including base, the opposite side of the bottom of base is fixedly installed with sliding block, the top of base is fixedly installed with frame, the top center position of base is fixedly installed with mounting plate, the top of mounting plate is detachably installed with lower cushion block, the inner top center position of frame is fixedly installed with lifting rod, the bottom of lifting rod is fixedly installed with top plate, and the bottom of top plate is detachably installed with upper cushion block;The bottom middle position of upper cushion block and the top middle position of lower cushion block are all provided with semicircular groove that is left and right through, multiple rollers are evenly arranged in semicircular groove, and the both ends of roller are rotatably installed on upper cushion block and lower cushion block, in the process of being processed, the part that is clamped can provide support point for shaft parts, avoid the problem that the stress part is bent because shaft parts are too long.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a clamping device for machining long shafts. Background Technology

[0002] To meet the machining needs of long shaft parts such as drive shafts, lead screws, and spindles in the machinery manufacturing, automotive, and aerospace industries, horizontal lathes are currently widely used for machining long shafts, including outer diameter, end face, and threading processes. These long shaft parts typically have a large length and a small diameter-to-length ratio, requiring extremely high stability, coaxiality, and surface quality during machining.

[0003] However, existing horizontal lathes face numerous technical challenges when machining long shafts. Traditional horizontal lathes primarily rely on three-jaw or four-jaw chucks to clamp one end, leaving the other end cantilevered. Due to the inherent weakness of long shafts, they are prone to bending deformation and vibration during high-speed rotation due to centrifugal force and cutting force. This results in roundness deviations, coaxiality discrepancies, and even tool breakage and workpiece scrap. Some companies employ simple center support structures to improve support, but the fit between the center and the center hole of the long shaft is prone to friction and wear, and it fails to provide effective support for the machined section in the middle of the long shaft, still failing to solve the problem of bending in the middle section. Therefore, there is an urgent need for a simple, adaptable, stable, and low-cost clamping device for machining long shafts to overcome the technical bottlenecks of ordinary horizontal lathes. Utility Model Content

[0004] The purpose of this invention is to provide a clamping device for machining long shafts, so as to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A clamping device for machining long shafts includes a base, with sliders fixedly installed on opposite sides of the bottom of the base, a frame fixedly installed on the top of the base, an mounting plate fixedly installed at the center of the top of the base, a lower pad detachably installed on the top of the mounting plate, a lifting rod fixedly installed at the center of the inner top of the frame, a top plate fixedly installed at the bottom of the lifting rod, and an upper pad detachably installed at the bottom of the top plate; a semi-circular groove penetrating from left to right is provided at the middle of the bottom of the upper pad and the middle of the top of the lower pad, the semi-circular groove at the bottom of the upper pad and the semi-circular groove at the top of the lower pad forming a circular hole, and a plurality of rollers are axially and evenly arranged in the semi-circular groove, with the two ends of the rollers rotatably mounted on the upper pad and the lower pad respectively.

[0006] By adopting the above technical solution, when using the shaft part, two semi-circular arc plates can be used to clamp the part that needs to be clamped, and then the part can be placed on the lower pad. Finally, the upper pad is pressed down, so that the part of the shaft part that needs to be clamped is fitted into the circular hole between the lower and upper pads. This setting allows the clamped part to provide a support point for the shaft part when it is selected at high speed, avoiding the problem of bending of the stressed part due to the excessive length of the shaft part during the processing. The slider allows the base of this device to be slidably installed on a regular horizontal lathe, realizing a simple modification of the horizontal lathe and reducing the modification cost of the equipment.

[0007] In a further embodiment, the lifting rod includes an upper sleeve, a lower sleeve, a ball screw, and a drive handwheel. The upper sleeve is fixedly installed at the inner top of the frame, and the lower sleeve is slidably installed with the upper sleeve. The lower sleeve is located at the bottom end of the upper sleeve. One end of the ball screw passes through the top of the upper sleeve and extends above the crossbeam. The other end of the ball screw is rotatably installed with the lower sleeve. The drive handwheel is fixedly installed with the top of the ball screw and is used to drive the lower sleeve to move up and down.

[0008] By adopting the above technical solution, the lifting distance of the lower sleeve can be precisely controlled by rotating the drive handwheel, thereby driving the upper pad to move and clamping the shaft.

[0009] In a further embodiment, the frame includes a first vertical rod, a second vertical rod, and a crossbeam. The first and second vertical rods are fixedly installed on opposite sides of the top of the base. The two ends of the crossbeam are fixedly connected to the top ends of the first and second vertical rods, respectively. The lifting rod is fixedly installed at the bottom middle position of the crossbeam.

[0010] By adopting the above technical solution, the first vertical rod, the second vertical rod, and the crossbeam form a portal frame structure, which can provide stable top support for the lifting rod and prevent the lifting rod from swaying when clamping the long shaft.

[0011] In a further embodiment, a slot is provided on the front side of the base.

[0012] By adopting the above technical solution, when needed, the device can be connected to the tool holder of a conventional horizontal lathe via a hook and a slot, so that the device moves with the tool holder and achieves better force distribution on the machining parts of shaft-type parts.

[0013] In a further embodiment, reinforcing ribs are fixedly installed at the connection between the bottom of the first and second vertical rods and the base, and the reinforcing ribs are in the form of right-angled triangles.

[0014] By adopting the above technical solution, the reinforcing ribs effectively disperse the stress concentration at the connection between the first and second vertical rods and the base, avoid the vertical rods from bearing the pressure of the lifting rod for a long time, enhance the connection strength between the first and second vertical rods and the base, and improve the overall rigidity of the frame.

[0015] In a further embodiment, a brush is detachably mounted on one top side of the lower pad.

[0016] By adopting the above technical solution to clean up debris, it is possible to prevent debris from entering the semi-circular groove and causing scratches on the surface of the parts.

[0017] In summary, this utility model has the following beneficial effects: 1. When reused, the shaft-like parts that need to be clamped can be held by two semi-circular arc plates, then placed on the lower pad, and finally the upper pad is pressed down, so that the part of the shaft-like parts that need to be clamped is fitted into the circular hole between the lower and upper pads. This setting allows the clamped part to provide a support point for the shaft-like parts when they are selected at high speed, avoiding the problem of bending of the stressed part due to the excessive length of the shaft-like parts during the machining process. The slider allows the base of this device to be slidably installed on a regular horizontal lathe, realizing a simple modification of the horizontal lathe and reducing the modification cost of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the frame structure of this utility model.

[0019] In the diagram, 1. Base; 2. Slider; 3. Frame; 31. First vertical rod; 32. Second vertical rod; 33. Crossbeam; 4. Mounting plate; 5. Lower pad; 6. Lifting rod; 61. Upper sleeve; 62. Lower sleeve; 63. Ball screw; 64. Drive handwheel; 7. Top plate; 8. Upper pad; 9. Reinforcing rib. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0022] Example 1: like Figures 1-2 As shown, a clamping device for long shaft machining includes a base 1. Slider 2 is fixedly installed on both opposite sides of the bottom of the base 1. A frame 3 is fixedly installed on the top of the base 1. An mounting plate 4 is fixedly installed at the center of the top of the base 1. A lower pad 5 is detachably installed on the top of the mounting plate 4. A lifting rod 6 is fixedly installed at the center of the inner top of the frame 3. A top plate 7 is fixedly installed at the bottom of the lifting rod 6. An upper pad 8 is detachably installed at the bottom of the top plate 7. A semi-circular groove penetrating from left to right is provided at the middle of the bottom of the upper pad 8 and the middle of the top of the lower pad 5. The semi-circular groove at the bottom of the upper pad 8 and the semi-circular groove at the top of the lower pad 5 form a circular hole. Multiple rollers are axially and evenly arranged in the semi-circular groove. The two ends of the rollers are rotatably installed on the upper pad 8 and the lower pad 5, respectively.

[0023] The lifting rod 6 includes an upper sleeve 61, a lower sleeve 62, a ball screw 63, and a drive handwheel 64. The upper sleeve 61 is fixedly installed at the inner top of the frame 3. The lower sleeve 62 is slidably installed with the upper sleeve 61 and is located at the bottom of the upper sleeve 61. One end of the ball screw 63 passes through the top of the upper sleeve 61 and extends to the top of the crossbeam 33. The other end of the ball screw 63 is rotatably installed with the lower sleeve 62. The drive handwheel 64 is fixedly installed with the top of the ball screw 63 and is used to drive the lower sleeve 62 to move up and down.

[0024] The frame 3 includes a first vertical rod 31, a second vertical rod 32, and a crossbeam 33. The first vertical rod 31 and the second vertical rod 32 are fixedly installed on opposite sides of the top of the base 1, and the two ends of the crossbeam 33 are fixedly connected to the top ends of the first vertical rod 31 and the second vertical rod 32, respectively.

[0025] The front side of the base 1 is provided with a slot. The bottom of the first vertical rod 31 and the second vertical rod 32 are fixedly installed with reinforcing ribs 9 at the connection between them and the base 1. The reinforcing ribs 9 are in the shape of a right triangle. A brush is detachably installed on the top of one side of the lower pad block 5.

[0026] Specific implementation process: First, the clamping device is slidably installed onto the corresponding track of a conventional horizontal lathe via the slider 2 at the bottom of the base 1. After adjusting to the appropriate position, the long shaft to be processed is placed on the lower pad 5 on the top of the mounting plate 4, aligning the part of the long shaft that needs to be clamped and supported with the semi-circular groove on the top of the lower pad 5. Then, the drive handwheel 64 on the top of the lifting rod 6 is rotated, which drives the ball screw 63 to rotate, causing the lower sleeve 62, which slides with the upper sleeve 61, to move downward. The lower sleeve 62 drives the bottom top plate 7 and the upper pad below the top plate 7. Block 8 moves down synchronously until the semi-circular groove at the bottom of the upper pad block 8 and the semi-circular groove at the top of the lower pad block 5 precisely align to form a circular hole. The part of the long shaft that needs to be clamped is stably fitted into the circular hole, completing the clamping and fixing of the long shaft. During the processing, the upper pad block 8 and the lower pad block 5 always provide support for the processing part of the long shaft to prevent the long shaft from bending during processing due to its excessive length. After the long shaft is processed, the drive handwheel 64 is rotated in the opposite direction to make the ball screw 63 drive the lower sleeve 62 and the upper pad block 8 to move up, releasing the long shaft. Finally, the processed long shaft is removed, completing the entire processing and clamping work.

[0027] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A clamping device for machining long shafts, characterized in that: The base (1) is provided with sliders (2) fixedly installed on both sides of the bottom of the base (1), a frame (3) fixedly installed on the top of the base (1), an installation plate (4) fixedly installed at the center of the top of the base (1), a lower pad (5) detachably installed on the top of the installation plate (4), a lifting rod (6) fixedly installed at the center of the inner top of the frame (3), a top plate (7) fixedly installed at the bottom of the lifting rod (6), and an upper pad (8) detachably installed at the bottom of the top plate (7); a semi-circular groove is provided at the middle of the bottom of the upper pad (8) and the middle of the top of the lower pad (5), and the semi-circular groove at the bottom of the upper pad (8) and the semi-circular groove at the top of the lower pad (5) form a circular hole, and multiple rollers are axially evenly arranged in the semi-circular groove, and the two ends of the rollers are rotatably installed on the upper pad (8) and the lower pad (5) respectively.

2. The clamping device for machining long shafts according to claim 1, characterized in that: The lifting rod (6) includes an upper sleeve (61), a lower sleeve (62), a ball screw (63), and a drive handwheel (64). The upper sleeve (61) is fixedly installed at the inner top of the frame (3). The lower sleeve (62) is slidably installed with the upper sleeve (61). The lower sleeve (62) is located at the bottom of the upper sleeve (61). One end of the ball screw (63) passes through the top of the upper sleeve (61) and extends above the crossbeam (33). The other end of the ball screw (63) is rotatably installed with the lower sleeve (62). The drive handwheel (64) is fixedly installed with the top of the ball screw (63). The drive handwheel (64) is used to drive the lower sleeve (62) to move up and down.

3. The clamping device for machining long shafts according to claim 1, characterized in that: The frame (3) includes a first vertical rod (31), a second vertical rod (32) and a crossbeam (33). The first vertical rod (31) and the second vertical rod (32) are fixedly installed on opposite sides of the top of the base (1). The two ends of the crossbeam (33) are fixedly connected to the top ends of the first vertical rod (31) and the second vertical rod (32) respectively.

4. The clamping device for machining long shafts according to claim 1, characterized in that: The base (1) has a slot on its front side.

5. A clamping device for machining long shafts according to claim 3, characterized in that: The bottom of the first vertical rod (31) and the second vertical rod (32) are fixedly installed with reinforcing ribs (9) at the connection between them and the base (1). The reinforcing ribs (9) are in the form of right-angled triangles.

6. The clamping device for machining long shafts according to claim 1, characterized in that: A brush is detachably mounted on one side of the top of the lower pad (5).

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