Floating hold-down anti-chatter device

Abstract

The application discloses a floating pressing anti-vibration device, which belongs to the field of machining and comprises a base, a positioning mechanism arranged on the base, the positioning mechanism being capable of pre-positioning the planar movement of a workpiece, a lifting clamping rod arranged on one side of the upper portion of the base, a U-shaped clamping block connected to the end portion of the clamping rod, the U-shaped clamping block being rotatably connected to the end portion of the clamping rod at the back of the opening groove, protrusions being arranged on the bottom surfaces of the two sides of the opening groove of the U-shaped clamping block, the protrusions being in contact with the upper end surfaces of the vertical holes of the workpiece, a floating block being connected to the end surface of the opening groove of the U-shaped clamping block, a vertical spring plunger being connected to the floating block, and the ball head below the spring plunger being capable of abutting against the upper surface of the protruding piece above the workpiece. The above structure can not only avoid the vibration of the tool, but also improve the machining efficiency, and can further prolong the service life of the connecting piece between the clamping oil cylinder and the U-shaped clamping block and the service life of the clamping oil cylinder.

Description

Technical Field

[0001] This invention relates to the field of machining, and more specifically to a floating clamping anti-vibration device. Background Technology

[0002] The workpiece in this design is a small, irregularly shaped part, such as... Figure 5 As shown, the workpiece features a vertical hole 101 and a horizontal hole 102 that intersect each other, requiring machining. The upper and lower end faces of the vertical hole 101 are flat, thus a fixture is needed to contact them during clamping. Additionally, two protrusions 103 are located on one side of the workpiece, separated by a gap. A razor is required to machine the gap during machining.

[0003] The above-mentioned small irregular parts have the following difficulties in actual processing. When the two protrusions 103 are clamped by the fixture, the gap between them will cause the protrusions 103 to deform (if the clamping force is too large, the protrusions 103 are not thick and the clamping force can easily cause them to deform; if the clamping force is too small, the positioning during the processing will be unstable, which will more easily cause problems in the workpiece processing). Moreover, the outer side of the protrusions 103 is the blank surface, and the clamping accuracy is not high enough, which will affect the subsequent processing accuracy. Therefore, the fixture currently clamps the upper and lower end faces of the vertical hole 101. However, the above clamping position will cause the razor to vibrate when processing the gap position, which will greatly affect the workpiece processing quality.

[0004] In view of the problems existing in the prior art, the present invention designs and manufactures a floating clamping anti-vibration device to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a floating clamping anti-vibration device that can not only prevent tool vibration but also improve processing efficiency. In addition, it can also increase the service life of the connecting parts between the clamping cylinder and the U-shaped clamping block, as well as the service life of the clamping cylinder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a floating clamping anti-vibration device, comprising a base, wherein a positioning mechanism is provided on the base, and the positioning mechanism is capable of pre-positioning the planar movement of the workpiece; A lifting clamping rod is provided on one side above the base. A U-shaped clamping block is connected to the end of the clamping rod. The back of the opening groove of the U-shaped clamping block is rotatably connected to the end of the clamping rod. Both sides of the bottom surface of the opening groove of the U-shaped clamping block are provided with protrusions. The protrusions are in contact with the upper end surface of the vertical hole of the workpiece. A floating block is connected to the end face of the U-shaped clamping block slot, and a vertical spring plunger is connected to the floating block. The ball head below the spring plunger can abut against the upper surface of the protruding part above the workpiece.

[0007] Preferably, when the protrusion contacts the upper end face of the vertical hole in the workpiece, the ball head below the spring plunger abuts against the upper surface of the protrusion above the workpiece.

[0008] Preferably, the height of the spring plunger is adjustable.

[0009] Preferably, the clamping rod end is provided with a vertical limiting groove, and the U-shaped clamping block opening groove back is provided with a vertical limiting block; The vertical limiting block is disposed in the vertical limiting groove, and the width of the vertical limiting groove is slightly larger than the width of the vertical limiting block.

[0010] Preferably, the clamping rod has a rotating hole at its end, and the bottom surface of the rotating hole has a threaded hole; The bottom surface of the U-shaped clamping block opening groove is provided with a mating step hole. The diameter of the mating step hole near the clamping rod end is smaller than the diameter away from the clamping rod end. A corresponding mating step post is provided in the mating step hole, and the mating step post can be connected in the rotating hole. The mating step column has a connecting hole at its center, and a screw in the connecting hole connects to the threaded hole on the clamping rod.

[0011] Preferably, when the mating step post is fixed to the end of the clamping rod, the U-shaped clamping block can rotate around the mating step post through the mating step hole.

[0012] Preferably, a fixed seat is provided on one side of the base, and a clamping cylinder is vertically connected to the fixed seat. A clamping rod is connected to the cylinder rod above the clamping cylinder. One end of the clamping rod is hinged to the end of the cylinder rod, and the other end of the clamping rod is connected to the U-shaped clamping block. A connecting rod is hinged to the clamping rod between the U-shaped clamping block and the cylinder rod. One end of the connecting rod is hinged to the clamping rod, and the other end of the connecting rod is hinged to the fixed seat.

[0013] Preferably, an elastic block is provided on one side of the protrusion below the workpiece. The elastic block can clamp and position the workpiece in the planar direction by pushing the protrusion below the workpiece laterally and cooperating with the positioning mechanism.

[0014] Preferably, the upper end face of the elastic block is not higher than the upper end face of the protrusion below the workpiece.

[0015] The advantages of this invention are: 1. When the U-shaped clamping block is used for clamping, the spring plunger on the floating block connected to the end face of the U-shaped clamping block slot can apply a clamping force to the protruding part above the workpiece. This clamping force comes from the spring plunger, ensuring the clamping force of the protruding part above the workpiece during processing and avoiding the problem of tool chatter during processing. Furthermore, by reasonably adjusting the position of the spring plunger, the pressure applied to the protruding part above the workpiece is adjusted, avoiding the problem of deformation of the protruding part above the workpiece caused by excessive clamping force directly relying on the U-shaped clamping block.

[0016] 2. Because the protrusions on the upper part of the workpiece can be stably pressed, the feed rate of the razor can be appropriately increased compared with the method without using a spring plunger, which can improve the processing efficiency of the interval between the upper and lower protrusions.

[0017] 3. When the clamping rod of this invention drives the U-shaped clamping block to clamp the workpiece, the elastic buffering of the spring plunger reduces the impact on the mating stepped post, thereby increasing the service life of the mating stepped post. Similarly, the elastic buffering of the spring plunger also reduces the impact on the piston of the clamping cylinder, indirectly protecting the clamping cylinder and increasing its service life.

[0018] 4. This invention utilizes a stepped column to allow the U-shaped clamping block to rotate and adjust, thus solving the problem of unstable clamping caused by unevenness of the upper surface of the vertical hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a floating clamping anti-vibration device; Figure 2 This is a schematic diagram of the workpiece after clamping according to the present invention; Figure 3 This is a front view of the workpiece after clamping according to the present invention; Figure 4 This is a cross-sectional view of the structure on the clamping rod of the present invention; Figure 5 This is a schematic diagram of the workpiece of the present invention.

[0020] In the diagram: 1. Base; 2. Clamping rod; 3. U-shaped clamping block; 4. Floating block; 5. Spring plunger; 6. Fixed seat; 7. Clamping cylinder; 8. Connecting rod; 9. Elastic block; 10. Vertical limiting block; 11. Vertical limiting groove; 12. Threaded hole; 13. Matching stepped post; 14. Matching stepped hole; 15. Protrusion; 101. Vertical hole; 102. Horizontal hole; 103. Protrusion. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 5As shown, a floating clamping anti-vibration device includes a base 1, on which a positioning mechanism is provided. The positioning mechanism can pre-position the planar movement of the workpiece. The positioning mechanism can include a basic positioning groove and a positioning block, and its purpose is to limit the movement on the plane, including rotation, longitudinal and lateral movement.

[0023] A lifting clamping rod 2 is provided on one side above the base 1. A U-shaped clamping block 3 is connected to the end of the clamping rod 2. The back of the opening groove of the U-shaped clamping block 3 is rotatably connected to the end of the clamping rod 2. Both sides of the bottom surface of the opening groove of the U-shaped clamping block 3 are provided with protrusions 15. The protrusions 15 are in contact with the upper end surface of the vertical hole 101 of the workpiece. The rotatable adjustment of the U-shaped clamping block 3 can solve the problem of unstable clamping caused by the unevenness of the upper end surface of the vertical hole 101. The opening groove of the U-shaped clamping block 3 is set here to avoid interference with the processing of the vertical hole 101.

[0024] The U-shaped clamping block 3 of the present invention is connected to a floating block 4 at the end face of the groove. A vertical spring plunger 5 is connected to the floating block 4. The height of the spring plunger 5 is adjustable. The ball head below the spring plunger 5 can abut against the upper surface of the protrusion 103 above the workpiece. The floating block 4 is also preferably U-shaped, which is also to avoid interference with the processing of the vertical hole 101.

[0025] When the protrusion 15 contacts the upper end face of the vertical hole 101 of the workpiece, the ball head below the spring plunger 5 abuts against the upper surface of the upper protrusion 103 of the workpiece. When the present invention uses the U-shaped clamping block 3 for clamping, the spring plunger 5 on the floating block 4 connected to the groove end face of the U-shaped clamping block 3 can apply a clamping force to the upper protrusion 103 of the workpiece. This clamping force comes from the spring plunger 5, ensuring the clamping force of the upper protrusion 103 of the workpiece during the processing and avoiding the problem of tool chatter during the processing. Moreover, by reasonably adjusting the position of the spring plunger 5, the pressure applied to the upper protrusion 103 of the workpiece is adjusted, avoiding the problem of deformation of the upper protrusion 103 of the workpiece caused by excessive clamping force directly using the U-shaped clamping block 3.

[0026] Furthermore, since the protrusion 103 on the upper part of the workpiece can be stably pressed, the feed rate of the razor can be appropriately increased compared to when the spring plunger 5 is not used to press down. This can improve the processing efficiency of the interval between the upper and lower protrusions 103, and indirectly improve the overall processing efficiency of the workpiece.

[0027] The clamping rod 2 of the present invention is provided with a vertical limiting groove 11 at its end, and a vertical limiting block 10 is provided on the back of the opening groove of the U-shaped clamping block 3. The vertical limiting block 10 is disposed in the vertical limiting groove 11. The width of the vertical limiting groove 11 is slightly larger than the width of the vertical limiting block 10. This structure can ensure that the U-shaped clamping block 3 can rotate relative to the clamping rod 2 at a certain angle, and avoid the clamping of the workpiece by the protrusion 15 of the U-shaped clamping block 3 due to excessive rotation angle.

[0028] To enable the U-shaped clamping block 3 to rotate relative to the end of the clamping rod 2, the clamping rod 2 of this invention is provided with a rotating hole at its end, and a threaded hole 12 is provided on the bottom surface of the rotating hole. The bottom surface of the slot of the U-shaped clamping block 3 is provided with a mating stepped hole 14. The diameter of the mating stepped hole 14 near the end of the clamping rod 2 is smaller than the diameter away from the end of the clamping rod 2. A corresponding mating stepped post 13 is provided in the mating stepped hole 14, and the mating stepped post 13 can be connected in the rotating hole.

[0029] The mating step post 13 has a connecting hole at its center. The connecting hole has a screw that connects to the threaded hole 12 on the clamping rod 2. The present invention uses the screw to fix the mating step post 13 in the rotating hole, thereby fixing the mating step post 13 to the end of the clamping rod 2. The U-shaped clamping block 3 can rotate around the mating step post 13 through the mating step hole 14.

[0030] The base 1 of this invention has a fixed seat 6 on one side, and a clamping cylinder 7 is vertically connected to the fixed seat 6. A clamping rod 2 is connected to the cylinder rod above the clamping cylinder 7. One end of the clamping rod 2 is hinged to the end of the cylinder rod, and the other end of the clamping rod 2 is connected to a U-shaped clamping block 3. A connecting rod 8 is hinged to the clamping rod 2 between the U-shaped clamping block 3 and the cylinder rod. One end of the connecting rod 8 is hinged to the clamping rod 2, and the other end of the connecting rod 8 is hinged to the fixed seat 6. Finally, the clamping cylinder 7 is used to raise and lower the U-shaped clamping block 3 at the end of the clamping rod 2.

[0031] After a period of actual use, it was found that the maintenance and replacement frequency of the mating stepped column 13 and the clamping cylinder 7 was significantly reduced compared to when the spring plunger 5 was not installed. It was later discovered that when the clamping rod 2 drives the U-shaped clamping block 3 to clamp the workpiece, the elastic buffering of the spring plunger 5 reduces the impact on the mating stepped column 13, thereby increasing its service life. Similarly, the elastic buffering of the spring plunger 5 also reduces the impact on the piston of the clamping cylinder 7, indirectly protecting the clamping cylinder 7 and increasing its service life.

[0032] The protrusion 103 below the workpiece of the present invention preferably has an elastic block 9 on one side. The elastic block 9 can push the protrusion 103 below the workpiece laterally and cooperate with the positioning mechanism to achieve clamping and positioning of the workpiece in the planar direction. At the same time, this structure can also reduce the problem of trembling caused by the protrusion 103 below the workpiece.

[0033] The upper end face of the elastic block 9 is not higher than the upper end face of the protrusion 103 below the workpiece, so as to avoid affecting the interference razor's processing of the gap between the upper and lower protrusions 103.

[0034] Specific processing steps of this invention: First, place the workpiece on the base 1, use the positioning mechanism of the base 1 to pre-position the workpiece, and at the same time, use the elastic block 9 to pre-position and clamp the workpiece in the planar direction. When the clamping cylinder 7 extends, it causes the protrusion 15 of the U-shaped clamping block 3 to press down on the upper end face of the vertical hole 101 of the workpiece. At the same time, the ball head of the spring plunger 5 on the floating block 4 can apply a clamping force to the protrusion 103 above the workpiece. The vertical hole 101 and the horizontal hole 102 of the workpiece are first machined with the help of a cutting tool, and finally the interval between the upper and lower protrusions 103 is machined with a razor. After the workpiece is processed, release the clamping force of the clamping cylinder 7, and the U-shaped clamping block 3 and the floating block 4 will rise. At this time, the workpiece can be taken out.

[0035] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention. Furthermore, it should be understood that after reading the technical description of this invention, those skilled in the art can make various alterations, modifications, and / or variations to the invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A floating clamping anti-vibration device, characterized in that, Includes a base (1), on which a positioning mechanism is provided, which is capable of pre-positioning the planar movement of the workpiece; The base (1) is provided with a lifting clamping rod (2) on one side above. The end of the clamping rod (2) is connected to a U-shaped clamping block (3). The back of the opening groove of the U-shaped clamping block (3) is rotatably connected to the end of the clamping rod (2). Both sides of the bottom surface of the opening groove of the U-shaped clamping block (3) are provided with protrusions (15). The protrusions (15) are in contact with the upper surface of the vertical hole (101) of the workpiece. The U-shaped clamp (3) has a floating block (4) connected to its slot end face. A vertical spring plunger (5) is connected to the floating block (4). The ball head below the spring plunger (5) can abut against the upper surface of the protrusion (103) above the workpiece.

2. The floating clamping anti-vibration device according to claim 1, characterized in that, When the protrusion (15) contacts the upper end face of the vertical hole (101) of the workpiece, the ball head below the spring plunger (5) abuts against the upper surface of the protrusion (103) above the workpiece.

3. The floating clamping anti-vibration device according to claim 1, characterized in that, The height position of the spring plunger (5) is adjustable.

4. The floating clamping anti-vibration device according to claim 1, characterized in that, The clamping rod (2) has a vertical limiting groove (11) at its end, and the U-shaped clamping block (3) has a vertical limiting block (10) on the back of its opening groove. The vertical limiting block (10) is set in the vertical limiting groove (11), and the width of the vertical limiting groove (11) is slightly larger than the width of the vertical limiting block (10).

5. A floating clamping anti-vibration device according to claim 4, characterized in that, The clamping rod (2) has a rotating hole at its end, and the bottom surface of the rotating hole has a threaded hole (12). The bottom surface of the U-shaped clamping block (3) opening groove is provided with a mating step hole (14). The diameter of the mating step hole (14) near the clamping rod (2) end is smaller than the diameter away from the clamping rod (2) end. The mating step hole (14) is provided with a corresponding mating step post (13). The mating step post (13) can be connected in the rotating hole. The mating step column (13) has a connecting hole at its center, and a screw is provided in the connecting hole to connect with the threaded hole (12) on the clamping rod (2).

6. A floating clamping anti-vibration device according to claim 5, characterized in that, When the mating step post (13) is fixed at the end of the clamping rod (2), the U-shaped clamping block (3) can rotate around the mating step post (13) through the mating step hole (14).

7. A floating clamping anti-vibration device according to claim 1, characterized in that, The base (1) is provided with a fixed seat (6) on one side. A clamping cylinder (7) is vertically connected to the fixed seat (6). A clamping rod (2) is connected to the cylinder rod above the clamping cylinder (7). One end of the clamping rod (2) is hinged to the end of the cylinder rod, and the other end of the clamping rod (2) is connected to the U-shaped clamping block (3). A connecting rod (8) is hinged on the clamping rod (2) between the U-shaped clamping block (3) and the cylinder rod. One end of the connecting rod (8) is hinged to the clamping rod (2), and the other end of the connecting rod (8) is hinged to the fixed seat (6).

8. A floating clamping anti-vibration device according to claim 1, characterized in that, An elastic block (9) is provided on one side of the protrusion (103) below the workpiece. The elastic block (9) can be used to clamp and position the workpiece in the plane direction by pushing the protrusion (103) below the workpiece laterally and cooperating with the positioning mechanism.

9. A floating clamping anti-vibration device according to claim 8, characterized in that, The upper surface of the elastic block (9) is not higher than the upper surface of the protrusion (103) below the workpiece.

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