Four-axis hydraulic clamp for vertical machining of rear suspension lower arm

Abstract

The utility model relates to the technical field, in particular to a four-axis hydraulic clamp for vertical machining of a rear suspension lower arm, which comprises a bottom plate, two ends of the bottom plate can be fixed with a four-axis machine tool, and the middle of the bottom plate is provided with an initial positioning device which abuts against the periphery of a circular boss in the center of a workpiece to perform coarse positioning. A pressing mechanism I for pressing a workpiece downwards is arranged above the initial positioning part; the two ends of the bottom plate are each provided with a mechanism for positioning and locking fork-shaped arms at the two ends of a workpiece, and the mechanisms comprise a jacking and clamping mechanism abutting against the front end faces of the fork-shaped arms, a supporting pile supporting the lower sides of the fork-shaped arms, a second pressing mechanism matched with the supporting pile for downward pressing, side ejector pins clamping the two sides of the fork-shaped arms and a third pressing mechanism. The rear suspension lower arm can be quickly positioned and clamped, the positions to be machined, close to the ends of the fork-shaped arms, at the two ends are further positioned and locked, so that deformation of a workpiece in the machining process is prevented, the air cylinder is adopted for clamping, and the automatic locking function can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tooling fixture technical field, in particular to a four -axis hydraulic clamp for vertical processing of rear overhangs down arm. BACKGROUND

[0002] As Figure 1 A kind of rear overhangs down arm is shown in the figure, material is aluminum alloy, middle is a inverted disc, disc center is provided with circular boss, circular boss is coaxially provided with center hole, disc is respectively forked to left lower and right lower and extends. Now need to drill hole and mill the end of the two end forked arms and the inner and outer two sides, because the workpiece material is soft, and the length of the two end forked arms is at least greater than 6 times the thickness of forked arm, wherein, the length of the longer end forked arm is greater than 12 times the thickness of forked arm, when processing, it is easy to cause workpiece deformation. Therefore, a tooling fixture is needed, which can quickly position and clamp the workpiece, and will not deform the workpiece during processing. UTILITY MODEL CONTENT

[0003] The utility model aims at the deficiency of prior art, and provides a four -axis hydraulic clamp for vertical processing of rear overhangs down arm, which adopts center positioning, two ends close clamping, and adopts hydraulic clamping and adapts four -axis machine tool clamp, realizes the quick positioning and clamping of rear overhangs down arm of automobile and automatic high efficiency, accurate and lossless processing.

[0004] The utility model adopts the technical scheme in the technical solutions that a four -axis hydraulic clamp for vertical processing of rear overhangs down arm, including two ends can be fixed with four -axis machine tool bottom plate, the middle of bottom plate is provided with the initial positioning of the rough positioning of the contact workpiece center circular boss outer periphery, the initial positioning is provided with the pressing mechanism one of the workpiece of the pressing mechanism one to the down pressure of the upper, the two ends of bottom plate are provided with a group of the mechanism of the positioning and locking of the two end forked arms of workpiece, this positioning and locking mechanism includes the top clamping mechanism of the contact forked arm front end surface, the support stake of the support forked arm lower side and the pressing mechanism two of the cooperation down pressure, the side thimble of the clamping from the forked arm two sides and the pressing mechanism three.

[0005] Preferably, the initial positioning includes the mounting seat fixed to the bottom plate, the mounting seat is sleeved with a support seat, the support seat is a circular tube, and the top is cut into at least three support claws, the support claws top contact the workpiece surface after clamping, the inside of the mounting seat is coaxially provided with a transition sleeve, the mounting seat is provided with a spring that can lift the transition sleeve, the top of the transition sleeve is sleeved with a positioning claw, and the top of the positioning claw can be sleeved with the outer periphery of the workpiece center circular boss.

[0006] Preferably, the bottom plate is provided with a circular groove for positioning and mounting the mounting seat.

[0007] Preferably, the positioning clamping jaw is higher than the support seat in the non-clamping state, and the positioning clamping jaw can be lowered below the support seat when the spring is compressed.

[0008] Preferably, the support pile is fixed to the bottom plate through screw connection, and the height of the support pile is adjustable.

[0009] Preferably, the pressing mechanism one comprises a corner cylinder one fixed to the bottom plate, and a pressing plate one is fixed to the end of the piston rod of the corner cylinder one, and the pressing plate one is in U shape.

[0010] Preferably, the top clamping mechanism comprises a top clamping plate in sliding connection with the bottom plate, the top clamping plate is in U shape, the bottom plate is fixed with a cylinder, and the top clamping plate is fixed to the end of the piston rod of the cylinder.

[0011] Preferably, the pressing mechanism two comprises a corner cylinder two fixed to the bottom plate, and a pressing plate two is fixed to the end of the piston rod of the corner cylinder two, and the pressing plate two is in a character shape.

[0012] Preferably, the pressing mechanism three comprises a corner cylinder three fixed to the bottom plate, and a pressing plate three is fixed to the end of the piston rod of the corner cylinder three, and the pressing plate three is in Z shape. The pressing mechanism three is only used for the longer end of the fork-shaped arm of the workpiece.

[0013] The corner angles of the corner cylinder one, the corner cylinder two and the corner cylinder three are all 90°.

[0014] The utility model discloses a four -axis hydraulic clamp for rear overhung arm vertical processing, which comprises a bottom plate fixed at both ends to a four -axis machine tool, an initial positioning for roughly positioning the outer periphery of a workpiece center circular boss is arranged in the middle of the bottom plate, a pressing mechanism one for pressing the workpiece downward is arranged above the initial positioning, a set of mechanism for positioning and locking the fork -shaped arm of the workpiece at both ends is arranged at both ends of the bottom plate, comprising a top clamping mechanism for abutting the front end face of the fork -shaped arm, a support pile for supporting the lower side of the fork -shaped arm and a pressing mechanism two for pressing downward in cooperation, a side ejector pin for clamping from both sides of the fork -shaped arm and a pressing mechanism three. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the three -dimensional structure diagram of the rear overhung arm of the utility model,

[0016] Figure 2 It is the three -dimensional structure diagram of the clamp clamping workpiece of the utility model,

[0017] Figure 3 is a three-dimensional mechanism diagram of the clamp of the utility model;

[0018] Figure 4 is a front view of the clamp of the utility model;

[0019] Figure 5 is Figure 4 a plan view;

[0020] Figure 6 is Figure 4 a B-B sectional view.

[0021] Mark explanation:

[0022] 1 - base plate, 2 - initial positioning, 21 - mounting seat, 22 - support seat, 23 - transition sleeve, 24 - spring, 25 - positioning claw, 3 - compression mechanism one, 31 - corner cylinder one, 32 - pressing plate one, 4 - top clamping mechanism, 41 - cylinder, 42 - top clamping plate, 5 - support pile, 6 - compression mechanism two, 61 - corner cylinder two, 62 - pressing plate two, 7 - side thimble, 8 - compression mechanism three, 81 - corner cylinder three, 82 - pressing plate three. Specific implementation

[0023] The utility model will be further explained in detail in combination with the drawings and specific embodiments, and is not limited to the implementation range of the utility model.

[0024] As Figures 2 to 6 shown, the four-axis hydraulic clamp for rear suspension lower arm vertical machining of the embodiment includes two ends can be fixed with four-axis machine tool base plate 1, the middle of base plate 1 is provided with the initial positioning 2 that the rough positioning of the outer periphery of the center circular boss of workpiece is contacted, the upper of initial positioning 2 is provided with the compression mechanism one 3 that the workpiece is pressed down;Base plate 1 is provided with a set of mechanism for positioning and locking the fork-shaped arm of both ends of workpiece at both ends, and the positioning and locking mechanism includes the top clamping mechanism 4 that the front end face of fork-shaped arm is contacted, the support pile 5 that the lower side of fork-shaped arm is supported and the compression mechanism two 6 that is matched and pressed down, the side thimble 7 that is clamped from both sides of fork-shaped arm and the compression mechanism three 8.

[0025] The embodiment is specialized in the machining of automobile rear suspension lower arm, mainly the drilling and milling of the end of fork-shaped arm of both ends of rear suspension lower arm.Workpiece is casted by aluminium material, and the center hole and the outer circular boss of hole are all casting blank, and because the center hole is not regular circle, so the initial positioning 2 of the embodiment is clamped in the outer periphery of circular boss and is roughly positioned, and the processing part of both ends of workpiece is constrained by the positioning and locking mechanism close to the processing part.

[0026] The initial positioning 2 includes a mounting seat 21 fixed to the bottom plate 1, the mounting seat 21 is sleeved with a support seat 22, the support seat 22 is a circular tube, and the top is cut into at least three support claws, which are clamped and abut against the surface of the workpiece, the inside of the mounting seat 21 is coaxially provided with a transition sleeve 23, the mounting seat 21 is provided with a spring 24 for lifting the transition sleeve 23, the top of the transition sleeve 24 is sleeved with a positioning clamping jaw 25, the top of the positioning clamping jaw 25 can be sleeved with the outer periphery of the circular boss of the workpiece. When rough positioning, the positioning clamping jaw 25 is clamped on the outer periphery of the circular boss of the workpiece, after the workpiece is pressed by the pressing mechanism one 3, the positioning clamping jaw 25 is retracted, and finally the middle disc part of the workpiece is fixed between the support seat 22 and the pressing mechanism one 3.

[0027] In order to ensure the accurate positioning of the two end machining parts, when clamping the workpiece, after rough positioning of the workpiece, the workpiece can be rotated around the positioning clamping jaw 25, so as to adjust the position of the fork-shaped arms at both ends of the workpiece, and after clamping the workpiece at both ends by using the positioning and locking mechanisms at both ends, the pressing mechanism one 3 is locked.

[0028] The pressing mechanism one 3 includes a corner cylinder one 31 fixed to the bottom plate 1, the end of the piston rod of the corner cylinder one 31 is fixed with a pressing plate one 32, and the pressing plate one 32 is in a U shape. When the pressing mechanism one 3 is pressed, the corner cylinder one 31 is retracted and rotated by 90°, so that the pressing plate one 32 presses the disc surface in the middle of the workpiece.

[0029] The positioning and locking mechanisms at both ends constrain from six directions of left and right, front and back, and up and down, including the top clamping mechanism 4 in the left and right direction, the top clamping mechanism 4 includes a horizontally telescopic cylinder 41, the end of the piston rod of the cylinder 41 is fixed with a U-shaped top clamping plate 42, in order to prevent the top clamping plate 42 from rotating, the top clamping plate 42 is slidingly connected with the bottom plate 1.

[0030] The bottom plate 1 is provided with a support pile 5 below each fork-shaped arm, the support pile 5 is threadedly connected with the bottom plate 1, so the height can be adjusted, and the top of the support pile 5 is a plane; the pressing mechanism two 6 includes a corner cylinder two 61 fixed to the bottom plate 1, the end of the piston rod of the corner cylinder two 61 is fixed with a pressing plate two 62, and the pressing plate two 62 is in a character shape. When the pressing mechanism two 6 is pressed, the corner cylinder two 61 is rotated by 90°, so that the both ends of the pressing plate two 62 press the fork-shaped arms of the workpiece on both sides.

[0031] The side arms of the U-shaped fork-shaped arm of the workpiece are provided with front and back direction positioning and locking inside and outside, including the side ejector pin 7 outside and the pressing mechanism three 8 inside, the length of the side ejector pin 7 is adjustable, the pressing mechanism three 8 includes the corner cylinder three 81 fixed to the bottom plate 1, the end of the piston rod of the corner cylinder three 81 is fixed with the pressing plate three 82, and the pressing plate three 82 is in a Z-shaped type. When the pressing mechanism three 8 is pressed, the corner cylinder three 81 is retracted and rotated by 90°, so that the front end of the pressing plate three 82 presses the inside of the fork-shaped arm of the workpiece.

[0032] It should be finally pointed out that the above embodiments are only used to illustrate the technical solutions of the present application, and in order to facilitate the description of the technical solutions, the directions such as front, back, left, right, up, middle and down are set based on the drawings, and are not a limitation on the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm, characterized in that: The device includes a base plate that can be fixed to a four-axis machine tool at both ends. The base plate has an initial positioning mechanism in the middle that abuts against the outer periphery of the circular boss at the center of the workpiece for coarse positioning. Above the initial positioning mechanism is a clamping mechanism that presses the workpiece downward. Each end of the base plate has a set of positioning and locking mechanisms for the fork-shaped arms at both ends of the workpiece. The positioning and locking mechanism includes a top clamping mechanism that abuts against the front end face of the fork-shaped arm, a support pile that supports the lower side of the fork-shaped arm and a clamping mechanism that presses downward in cooperation with it, and a side pin and a clamping mechanism that clamps from both sides of the fork-shaped arm.

2. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 1, characterized in that: The initial positioning includes a mounting base fixed to the base plate, a support base fitted on the mounting base, the support base being cylindrical and cut into at least three support claws at the top, the top of which abuts against the workpiece surface after clamping, a transition sleeve being coaxially arranged inside the mounting base, the mounting base being provided with a spring that allows the transition sleeve to rise and fall, a positioning claw fitting on the top of the transition sleeve, the top of which can fit onto the outer periphery of the central circular boss of the workpiece.

3. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 2, characterized in that: The base plate is provided with a circular groove to facilitate the positioning and installation of the mounting base.

4. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 2, characterized in that: When not clamped, the positioning claw is higher than the support base, while when the spring is compressed, the positioning claw can be lowered to below the support base.

5. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 1, characterized in that: The support pile is fixed to the base plate by a threaded connection, and the height of the support pile is adjustable.

6. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 1, characterized in that: The clamping mechanism includes a corner cylinder fixed to the base plate, and a pressure plate is fixed to the piston rod end of the corner cylinder. The pressure plate is U-shaped.

7. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 1, characterized in that: The top clamping mechanism includes a top clamping plate that is slidably connected to the base plate. The top clamping plate is U-shaped. A cylinder is fixed to the base plate. The top clamping plate is fixed to the end of the piston rod of the cylinder.

8. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 1, characterized in that: The second pressing mechanism includes a second corner cylinder fixed to the base plate. The piston rod end of the second corner cylinder is fixed with a second pressure plate, which is in the shape of a straight line.

9. A four-axis hydraulic clamp for vertical machining of a rear cantilever lower arm according to claim 1, characterized in that: The clamping mechanism three includes a corner cylinder three fixed to the base plate, and a pressure plate three is fixed to the piston rod end of the corner cylinder three. The pressure plate three is Z-shaped.

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