Flexible CNC milling clamp

Abstract

The utility model relates to the technical field of CNC (Computer Numerical Control) clamps, and discloses a flexible CNC milling clamp which comprises a clamp body fixed on a CNC sliding table through a bolt, a plurality of front and rear round insertion holes are formed in the clamp body in a matrix manner, front and rear round rods are inserted in the front and rear round insertion holes in a front and rear sliding manner, and the front and rear round rods are fixed on the CNC sliding table through bolts. Wherein the front-section square rod part of the front-back round rod extends out of the clamp body and is used for clamping a workpiece, a reset spring is embedded in a round hole in the back end of the front-back round insertion hole, a clamp body angle hole is formed in the clamp body, and a cover plate angle hole is formed in the tail end cover plate covering the back end of the clamp body. When a special-shaped workpiece is clamped, a clamping face attached to the surface of the workpiece can be rapidly formed through the self-adaptive action of the front round rod and the rear round rod, and the locking plate can be moved by conveniently rotating the nut screwing handle so that the rubber embedded ring can clamp the front round rod and the rear round rod.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC fixtures, in particular to a flexible CNC milling fixture. Background Art

[0002] Most of the workpieces currently processed by CNC milling machines have special-shaped surfaces. Using traditional bench vises for clamping will lead to unstable clamping, concentrated force on the clamping points will cause deformation of the workpiece, and concentrated clamping points will cause vibration of the workpiece during milling operations. Obviously, the clamping effect of traditional clamps is not good. Now, multiple independent clamps are used to adopt multi-point clamping to improve the above-mentioned undesirable conditions. However, the installation of multiple independent clamps has high requirements and is time-consuming and labor-intensive, and the tightness of each clamping point cannot be well unified, so this case is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the above problems, a flexible CNC milling fixture is provided, which solves the above problems.

[0004] The utility model solves the technical problem by adopting the following technical solutions:

[0005] A flexible CNC milling fixture comprises a clamping body fixed to a CNC slide table by bolts, wherein the clamping body is provided with a plurality of front and rear round insertion holes arranged in a matrix, and a front and rear round rod is inserted and slidably inserted in the front and rear round insertion holes, wherein the front square rod portion of the front and rear round rod extends out of the clamping body for clamping a workpiece, and a return spring is embedded and installed in the rear end round hole of the front and rear round insertion hole, and the clamping body is provided with a clamping body corner hole, and a cover plate corner hole is provided on the tail end cover plate covered on the rear end of the clamping body. The cover plate corner hole and the clamping body corner hole are connected by bolts, and the return spring is pressed against the tail end of the front and rear round rod for resetting the front and rear round rod. When clamping, after the clamping body is pressed against the workpiece, the front and rear round rod will automatically adhere to the surface of the workpiece to form a clamping surface that is relatively in contact with the surface of the workpiece, effectively increasing the effective force-bearing clamping area, providing better clamping force, and reducing the risk of clamping deformation, and a locking plate that moves laterally for locking the front and rear round rod is also provided in the clamping body.

[0006] In an embodiment of a flexible CNC milling fixture, a plate-shaped cavity with a one-way opening is provided on the side of the clamp body, a locking plate is inserted and slidably installed in the plate-shaped cavity, and a locking hole corresponding to the front and rear round insertion hole is provided on the locking plate, the front and rear round rod passes through the locking hole, and the side port of the plate-shaped cavity is closed by an embedding strip, and second tightening screw holes are provided at the upper and lower ends of the embedding strip, and first tightening screw holes are provided at the upper and lower ends of the clamp body, the second tightening screw hole and the first tightening screw hole are fixed by screws, and a threaded push rod arranged on the side of the locking plate passes through the embedding strip and is threadedly connected with a nut handle, when the nut handle is rotated, the locking plate can be moved laterally, when the locking plate is in the initial position, the rear section of the front and rear round rod passes through the locking hole and does not contact the locking plate, when clamping is required, the nut handle is turned to make the threaded push rod move laterally, thereby making the inner wall of the locking hole press tightly against the front and rear round rod to form a lateral clamping force.

[0007] In an embodiment of a flexible CNC milling fixture, the front half of the square rod of the front and rear round rod is magnetic, so that the front and rear round rods are magnetically attracted to the clamp body, thereby ensuring that the front and rear round rods will not fall out of the clamp body by themselves, and a designated single front and rear round rod can be directly pulled out when maintenance or repair and replacement is required.

[0008] In an embodiment of a flexible CNC milling fixture, a CNC slide connecting plate is fixedly provided on the side of the lower end surface of the clamp body, and the CNC slide connecting plate is provided with threaded holes for fixing the clamp body on the slide of a CNC machine tool.

[0009] In an embodiment of a flexible CNC milling fixture, in order to increase the friction force during clamping and to create more contact area during clamping, a rubber inner ring is embedded and fixed in the inner ring of the locking hole, and when the locking plate moves laterally, the rubber inner ring is pressed tightly against the front rear round rod.

[0010] In an embodiment of a flexible CNC milling fixture, a knurling pattern is cold-rolled on the outer wall surface of the round rod of the rear section of the front and rear round rod, so that when the rubber inner ring is pressed tightly against the outer wall surface of the round rod of the rear section of the front and rear round rod, the deformation of the rubber inner ring and the knurling pattern are embedded to form a stronger locking force, which effectively improves the clamping force and stability of the front and rear round rod.

[0011] In an embodiment of a flexible CNC milling fixture, in order to facilitate the retraction of the locking plate and avoid the loose state caused by the gap in the threaded connection between the threaded push rod and the nut handle, a pre-tensioning spring is provided between the embedding strip and the locking plate. When the locking plate moves outward, the pre-tensioning spring is compressed, and at the same time, the rubber inner ring laterally clamps the round rod of the rear section of the front rear round rod. When the nut handle is reversed, the locking plate retracts and the movement of the locking plate is kept stable under the action of the pre-tensioning spring.

[0012] In an embodiment of a flexible CNC milling fixture, a sink is provided at the front end of the front rear round rod, and a rubber end can be embedded in the sink to avoid scratching the outer surface of the workpiece when clamping a workpiece with high requirements for outer surface roughness.

[0013] In an embodiment of a flexible CNC milling fixture, in order to facilitate the firm clamping of replaceable end caps, including hard ceramic end caps or soft rubber end caps, a threaded hole is also provided in the sink, thereby ensuring that the replaceable end caps maintain a stable connection state after installation.

[0014] The advantages and positive effects of the utility model are as follows: when clamping a special-shaped workpiece, a clamping surface that is closer to the surface of the workpiece can be quickly formed through the adaptive action of the front and rear round rods, and the locking plate can be moved by conveniently turning the nut handle so that the rubber embedded ring clamps the front and rear round rods. The design of the locking plate can quickly and synchronously lock a plurality of the front and rear round rods, and the design structure is simple, and the front and rear round rods can be lengthened according to the clamping requirements to form a clamp with a large stroke, and the clamping force will not be unstable as the stroke increases. In addition, an expansion port is reserved at the front end of the front and rear round rods for installing an end head, and different end heads can be used to achieve a more suitable clamping effect on the surfaces of workpieces with different requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described with reference to the accompanying drawings and embodiments below.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the front and rear round rod 18 in the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model installed on a CNC slide (using two-sided special-shaped clamping);

[0019] Figure 4 It is a schematic diagram of the structure of the utility model installed on a CNC slide (using single-sided special-shaped clamping). DETAILED DESCRIPTION

[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0021] The following conclusions and drawings further describe the embodiments of the present invention in detail:

[0022] like Figure 1-4 As shown, the utility model discloses a flexible CNC milling fixture, comprising a clamp body 10 fixed on a CNC slide by bolts, a plurality of front and rear round insertion holes 12 arranged in a matrix on the clamp body 10, a front and rear round rod 18 is inserted and slidably inserted in the front and rear round insertion holes 12, wherein the front section of the front and rear round rod 18 extends out of the clamp body 10 for clamping a workpiece, and a return spring 13 is embedded in the rear end round hole of the front and rear round insertion hole 12, and a clamp body corner hole 11 is provided on the clamp body 10, and a tail end cover plate 14 is installed at the rear end of the clamp body 10. A cover plate corner hole 15 is provided on it, and the cover plate corner hole 15 and the clamp body corner hole 11 are connected by bolts. The reset spring 13 is against the tail end of the front and rear round rod 18 to reset the front and rear round rod 18. When clamping, after the clamp body 10 is pressed against the workpiece, the front and rear round rod 18 will automatically adhere to the surface of the workpiece to form a clamping surface that is relatively in contact with the surface of the workpiece, which effectively increases the effective force-bearing clamping area, can provide better clamping force, and reduce the risk of clamping deformation. In addition, a locking plate 21 is provided in the clamp body 10 for laterally moving to lock the front and rear round rod 18.

[0023] In an embodiment of a flexible CNC milling fixture, a one-way opening plate-shaped cavity 16 is provided on the side of the clamp body 10, a locking plate 21 is inserted and slidably installed in the plate-shaped cavity 16, and a locking hole 22 corresponding to the front rear round insertion hole 12 is provided on the locking plate 21, and the front rear round rod 18 passes through the locking hole 22, and the side port of the plate-shaped cavity 16 is closed by an embedding strip 25, and second tightening screw holes 27 are provided at the upper and lower ends of the embedding strip 25, and first tightening screw holes 17 are provided at the upper and lower ends of the clamp body 10, and the second tightening screw holes 27 and the The first set screw hole 17 is fixed by a screw, and the threaded push rod 24 arranged on the side of the locking plate 21 passes through the embedding strip 25 and is threadedly connected with the nut handle 26. When the nut handle 26 is turned, the locking plate 21 can be moved laterally. When the locking plate 21 is in the initial position, the rear section of the front rear round rod 18 passes through the locking hole 22 and does not contact the locking plate 21. When clamping is required, the nut handle 26 is turned to make the threaded push rod 24 move laterally, thereby making the inner wall of the locking hole 22 press tightly against the front rear round rod 18 to form a lateral clamping force.

[0024] In an embodiment of a flexible CNC milling fixture, the front half of the square rod of the front and rear round rod 18 is magnetic, so that the front and rear round rod 18 is magnetically attracted to the clamp body 10, thereby ensuring that the front and rear round rod 18 will not fall out of the clamp body 10 by itself, and can also directly pull out a designated single front and rear round rod 18 when maintenance or repair and replacement is required.

[0025] In an embodiment of a flexible CNC milling fixture, a CNC slide connecting plate 28 is fixedly provided on the side of the lower end surface of the clamp body 10, and a threaded hole is provided on the CNC slide connecting plate 28 for fixing the clamp body 10 on the slide of the CNC machine tool.

[0026] In an embodiment of a flexible CNC milling fixture, in order to increase the friction during clamping and to create more contact area during clamping, a rubber inner ring 23 is embedded and fixed in the inner ring of the locking hole 22. When the locking plate 21 moves laterally, the rubber inner ring 23 is pressed tightly against the front rear round rod 18.

[0027] In an embodiment of a flexible CNC milling fixture, a knurling pattern is cold-rolled on the outer wall surface of the round rod of the rear section of the front rear round rod 18, so that when the rubber inner ring 23 is pressed tightly against the outer wall surface of the round rod of the rear section of the front rear round rod 18, the deformation of the rubber inner ring 23 and the knurling pattern form a stronger locking force, which effectively improves the clamping force and stability of the front rear round rod 18.

[0028] In an embodiment of a flexible CNC milling fixture, in order to facilitate the retraction of the locking plate 21 and avoid the loose state caused by the gap in the threaded connection between the threaded push rod 24 and the nut handle 26, a pre-tightening spring is provided between the embedding strip 25 and the locking plate 21. When the locking plate 21 moves outward, the pre-tightening spring is compressed, and at the same time, the rubber inner ring 23 clamps the round rod of the rear section of the front rear round rod 18 laterally. When the nut handle 26 is reversed, the locking plate 21 retracts and the locking plate 21 is kept stable under the action of the pre-tightening spring.

[0029] In an embodiment of a flexible CNC milling fixture, a sink 19 is provided at the front end of the front rear round rod 18, and a rubber end can be embedded in the sink 19 to avoid scratching the outer surface of the workpiece when clamping a workpiece with high requirements for outer surface roughness.

[0030] In an embodiment of a flexible CNC milling fixture, in order to facilitate the firm clamping of replaceable end caps, including hard ceramic end caps or soft rubber end caps, a threaded hole 20 is further provided in the sink 19, thereby ensuring that the replaceable end caps maintain a stable connection state after installation.

[0031] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A flexible CNC milling fixture, comprising a fixture body (10) fixed on a CNC slide by bolts, characterized in that: The clamp body (10) is provided with a plurality of front and rear round insertion holes (12) arranged in a matrix, and a front and rear round rod (18) is inserted and slidably mounted in the front and rear round insertion holes (12), wherein the front square rod portion of the front and rear round rod (18) extends out of the clamp body (10) for clamping a workpiece, and a return spring (13) is embedded in the rear end round hole of the front and rear round insertion hole (12), and the clamp body (10) is provided with a clamp body corner hole (11), and a cover plate corner hole (15) is provided on the rear end cover plate (14) mounted on the rear end of the clamp body (10), and the cover plate corner hole (15) and The corner holes (11) of the clamp body are connected by bolts, and the reset spring (13) is pressed against the tail end of the front and rear round rods (18) to reset the front and rear round rods (18). When clamping, after the clamp body (10) is pressed against the workpiece, the front and rear round rods (18) will automatically adhere to the surface of the workpiece to form a clamping surface that is relatively in contact with the surface of the workpiece, effectively increasing the effective force-bearing clamping area, providing better clamping force, and reducing the risk of clamping deformation. In addition, a locking plate (21) that moves laterally to lock the front and rear round rods (18) is provided in the clamp body (10).

2. A flexible CNC milling fixture according to claim 1, characterized in that: A one-way opening plate-shaped cavity (16) is provided on the side of the clamp body (10), a locking plate (21) is inserted and slidably installed in the plate-shaped cavity (16), and a locking hole (22) corresponding to the front rear round insertion hole (12) is provided on the locking plate (21), and the front rear round rod (18) passes through the locking hole (22), and the side port of the plate-shaped cavity (16) is closed by an embedding strip (25), and second tightening screw holes (27) are provided at the upper and lower ends of the embedding strip (25), and first tightening screw holes (17) are provided at the upper and lower ends of the clamp body (10), and the second tightening screw hole (27) and the first tightening screw hole ( 17) is fixed by screws, and a threaded push rod (24) arranged on the side of the locking plate (21) passes through the embedding strip (25) and is threadedly connected with the nut handle (26). When the nut handle (26) is turned, the locking plate (21) can be moved laterally. When the locking plate (21) is in an initial position, the rear section of the front rear round rod (18) passes through the locking hole (22) and does not contact the locking plate (21). When clamping is required, the nut handle (26) is turned to make the threaded push rod (24) move laterally, thereby making the inner wall of the locking hole (22) press against the front rear round rod (18) to form a lateral clamping force.

3. A flexible CNC milling fixture according to claim 2, characterized in that: The front half of the square rod of the front rear round rod (18) is magnetic, so that the front rear round rod (18) and the clamp body (10) are magnetically attracted to each other, thereby ensuring that the front rear round rod (18) will not fall out of the clamp body (10) by itself, and a designated single front rear round rod (18) can be directly pulled out when maintenance or repair and replacement is required.

4. A flexible CNC milling fixture according to claim 3, characterized in that: A CNC slide connecting plate (28) is fixedly provided on the side of the lower end surface of the clamp body (10), and a threaded hole is provided on the CNC slide connecting plate (28) for fixing the clamp body (10) on the slide of the CNC machine tool.

5. A flexible CNC milling fixture according to claim 4, characterized in that: In order to increase the friction force during clamping and to generate more contact area during clamping, a rubber inner ring (23) is embedded and fixed in the inner ring of the locking hole (22); when the locking plate (21) moves laterally, the rubber inner ring (23) is pressed tightly against the front rear round rod (18).

6. A flexible CNC milling fixture according to claim 5, characterized in that: A knurling pattern is cold-rolled on the outer wall surface of the rear section of the front and rear round rod (18), so that when the rubber inner ring (23) is pressed tightly against the outer wall surface of the rear section of the front and rear round rod (18), the deformation of the rubber inner ring (23) and the knurling pattern are embedded to form a stronger locking force, which effectively improves the clamping force and stability of the front and rear round rod (18).

7. The flexible CNC milling fixture according to claim 6, characterized in that: In order to facilitate the retraction of the locking plate (21) and avoid the loose state caused by the gap in the threaded connection between the threaded push rod (24) and the nut handle (26), a pre-tightening spring is provided between the embedding strip (25) and the locking plate (21). When the locking plate (21) moves outward, the pre-tightening spring is compressed, and at the same time, the rubber inner ring (23) clamps the round rod of the rear section of the front rear round rod (18) laterally. When the nut handle (26) is reversed, the locking plate (21) retracts and the locking plate (21) is kept moving stably under the action of the pre-tightening spring.

8. The flexible CNC milling fixture according to claim 7, characterized in that: A sink (19) is also provided at the front end of the front rear round rod (18), and a rubber end head can be embedded in the sink (19), so as to avoid scratching the outer surface of the workpiece when clamping a workpiece with a high requirement for outer surface roughness.

9. The flexible CNC milling fixture according to claim 8, characterized in that: In order to facilitate the secure clamping of replaceable terminals, including hard ceramic terminals or soft rubber terminals, a threaded hole (20) is also provided in the sink (19), thereby ensuring that the replaceable terminals maintain a stable connection state after installation.

Images