Universal zero-point positioning clamping device for numerical control machine tool

Abstract

The invention relates to the technical field of zero-point positioning and clamping devices, and particularly discloses a universal zero-point positioning and clamping device for a numerical control machine tool, comprising: a base, the upper surface of the base is provided with a chuck mounting groove, and the lower surface of the base is provided with a telescopic control groove; the chuck body comprises an upper fixing plate, a movable lifting ring, a positioning column, a positioning ball, a spring and an extension rod, the upper fixing plate is fixedly mounted on the upper surface of the base through a bolt, and the movable lifting ring is slidably mounted in the chuck mounting groove; according to the zero-point positioning clamping device, the upward pressing mechanism is arranged, the mode that in an existing zero-point positioning clamping device, a movable lifting ring is directly pushed to ascend by introducing gas is replaced, gas is introduced into an inflation expansion part, the inflation expansion part jacks up an extension rod in an expansion mode, and therefore the movable lifting ring ascends, the air tightness is better, a sealing ring does not need to be used, and the working efficiency is improved. And the clamping and fixing effect of the blind rivet can be more stably achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of zero point positioning clamping devices, and in particular relates to a universal zero point positioning clamping device for numerically controlled machine tools. Background Art

[0002] With the development of science and technology, the manufacturing industry has higher and higher requirements for machining precision. Traditional machining equipment has long been unable to meet the increasingly demanding process requirements. Therefore, CNC machine tools, a highly automated machining equipment, were born. CNC machine tools use CNC systems to automatically control the cutting, feeding and other actions of the machine tools, which can achieve precise control of the cutting amount and greatly improve production efficiency. Since CNC machining centers are a general and expensive cutting processing equipment, different clamping fixtures are required when processing different products. The existing clamping fixtures are cumbersome to install and have low repeated positioning accuracy, resulting in inconsistent precision of processed products.

[0003] In the Chinese patent with publication number CN210209568U, a universal zero-point positioning clamping device for CNC machine tools is disclosed. The utility model can realize rapid clamping of tooling fixtures, has good stability, high repeat positioning accuracy, the accuracy can reach 0.005mm, is easy to disassemble and assemble, and the machine downtime is short, which can save disassembly and assembly time, reduce the labor intensity of workers, and improve processing efficiency.

[0004] In the above technology, gas is introduced between the upper and lower bases to achieve spring compression of the movable block. This method needs to consider the problem of sealing ring loss. The wear of the sealing ring will directly affect the clamping effect. Therefore, a universal zero-point positioning clamping device for CNC machine tools that does not require the use of sealing rings is proposed to solve the above problem. Summary of the invention

[0005] The object of the present invention is to provide a universal zero-point positioning clamping device for CNC machine tools to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A universal zero-point positioning clamping device for a numerically controlled machine tool, comprising:

[0008] A base, wherein the upper surface of the base is provided with a chuck mounting groove, and the lower surface of the base is provided with a telescopic control groove;

[0009] A chuck body, the chuck body comprising an upper fixed plate, a movable lifting ring, a positioning column, a positioning ball, a spring and an extension rod, the upper fixed plate being fixedly mounted on the upper surface of the base by bolts, the movable lifting ring being slidably mounted inside the chuck mounting groove, the positioning column being fixedly mounted in the middle of the bottom of the chuck mounting groove by bolts, the positioning balls being placed on the upper surface of the positioning column in an annular array, and being in contact with the inclined surface of the inner hole of the movable lifting ring, the two ends of the spring being fixedly connected to the upper surface of the movable lifting ring and the lower surface of the upper fixed plate respectively, the extension rod being fixedly mounted on the lower surface of the movable lifting ring in an annular array, and being penetrated into the interior of the telescopic control groove;

[0010] An upper pressure mechanism, the upper pressure mechanism comprises an inflatable expansion component and a lower fixed plate, the inflatable expansion component comprises a bottom plate, a circular ring, an expansion ring and a top plate, the upper surface of the bottom plate is fixedly connected to the circular ring, the lower surface of the expansion ring is fixedly connected to the upper surface of the circular ring, the top plate is fixedly connected to the lower surface of the expansion ring, the lower fixed plate is fixedly connected to the lower surface of the base by bolts, and is fixedly connected to the bottom plate by bolts;

[0011] An inflation mechanism, the inflation mechanism comprising an inflation pipe joint and a connecting hose, the inflation pipe joint being fixedly mounted on an outer wall of one side of the base, one end of the connecting hose being connected to the inflation pipe joint, and the other end of the connecting hose extending into the interior of the telescopic control groove and connected to the inflation expansion component;

[0012] A pull nail, wherein a side of the pull nail is provided with a clamping groove which cooperates with the positioning ball.

[0013] Preferably, a through hole connecting the chuck mounting slot and the telescopic control slot is opened inside the base, and the extension rod is slidably connected to the through hole.

[0014] Preferably, a side surface of the circular ring is provided with an inflation interface connected with the interior thereof, and the inflation interface and the connecting hose are detachably mounted.

[0015] Preferably, the top plate is slidably connected to the inner wall of the telescopic control groove.

[0016] Preferably, a stopper is fixedly mounted on the lower surface of the upper fixing plate, and a plug hole penetrating the upper fixing plate and the stopper is provided thereon, and the rivet passes through the plug hole and extends to the interior of the chuck mounting groove.

[0017] Preferably, an embedding groove is provided in the middle of the upper surface of the positioning column, and slope surfaces are provided on both inner and outer sides of the upper surface.

[0018] Preferably, a groove is formed on the upper surface of the movable lifting ring, and the lower end of the spring is fixedly mounted on the bottom of the groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention provides an upward pressure mechanism, instead of directly pushing the movable lifting ring upward by introducing gas in the existing zero-point positioning clamping device, gas is introduced into the interior of the inflatable expansion component, so that the inflatable expansion component expands and pushes up the extension rod to raise the movable lifting ring. The air tightness is better, no sealing ring is needed, and the clamping and fixing effect of the rivet can be achieved more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is another three-dimensional structural schematic diagram of the present invention;

[0023] Figure 3 It is a side structural cross-sectional view of the present invention;

[0024] Figure 4 It is a three-dimensional structural cross-sectional view of the present invention.

[0025] In the figure:

[0026] 1. Base; 11. Chuck mounting slot; 12. Telescopic control slot; 13. Through hole;

[0027] 2. Chuck body; 21. Upper fixed plate; 22. Movable lifting ring; 23. Positioning column; 24. Positioning ball; 25. Spring; 26. Extension rod; 27. Stopper; 28. Socket; 29. ​​Embedding groove; 210. Recess;

[0028] 3. Pressing mechanism; 31. Inflatable expansion component; 311. Bottom plate; 312. Ring; 313. Expansion ring; 314. Top plate; 315. Inflatable interface; 32. Lower fixing plate;

[0029] 4. Inflating mechanism; 41. Inflating pipe joint; 42. Connecting hose;

[0030] 5. Pull rivet; 51. Card slot. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] See also Figure 1 - Figure 4As shown, a universal zero-point positioning clamping device for CNC machine tools comprises:

[0034] A base 1, the upper surface of the base 1 is provided with a chuck mounting groove 11, and the lower surface thereof is provided with a telescopic control groove 12;

[0035] The chuck body 2 comprises an upper fixed plate 21, a movable lifting ring 22, a positioning column 23, a positioning ball 24, a spring 25 and an extension rod 26. The upper fixed plate 21 is fixedly mounted on the upper surface of the base 1 by bolts, the movable lifting ring 22 is slidably mounted inside the chuck mounting groove 11, the positioning column 23 is fixedly mounted in the middle of the bottom of the chuck mounting groove 11 by bolts, the positioning ball 24 is placed on the upper surface of the positioning column 23 in an annular array, and it contacts the inclined surface of the inner hole of the movable lifting ring 22, the two ends of the spring 25 are fixedly connected to the upper surface of the movable lifting ring 22 and the lower surface of the upper fixed plate 21 respectively, and the extension rod 26 is fixedly mounted on the lower surface of the movable lifting ring 22 in an annular array, and it penetrates into the interior of the telescopic control groove 12;

[0036] The upper pressure mechanism 3 includes an inflatable expansion component 31 and a lower fixed plate 32. The inflatable expansion component 31 includes a bottom plate 311, a circular ring 312, an expansion ring 313 and a top plate 314. The upper surface of the bottom plate 311 is fixedly connected to the circular ring 312, the lower surface of the expansion ring 313 is fixedly connected to the upper surface of the circular ring 312, the top plate 314 is fixedly connected to the lower surface of the expansion ring 313, and the lower fixed plate 32 is fixedly connected to the lower surface of the base 1 by bolts, and is fixedly connected to the bottom plate 311 by bolts;

[0037] The inflation mechanism 4 includes an inflation pipe joint 41 and a connecting hose 42. The inflation pipe joint 41 is fixedly mounted on one side outer wall of the base 1. One end of the connecting hose 42 is connected to the inflation pipe joint 41, and the other end thereof extends to the interior of the telescopic control groove 12 and is connected to the inflation expansion component 31.

[0038] The pull nail 5 has a side surface provided with a clamping groove 51 which cooperates with the positioning ball 24 and is clamped.

[0039] As can be seen from the above, by setting the upper fixed plate 21, the movable lifting ring 22, the positioning column 23, the positioning ball 24 and the spring 25, and cooperating with the chuck mounting groove 11 opened on the base 1, it is possible to form the zero-point chuck in the prior art except for the entire structure of the inflation channel, which is a common part in the prior art. By setting the upper pressing mechanism 3, when compressed gas is introduced into the inflation expansion component 31, the expansion ring 313 expands and expands, so that the top plate 314 moves upward, thereby pushing the extension rod 26 upward. Therefore, it is possible to achieve the effect of moving the movable lifting ring 22 upward and compressing the spring 25. When gas is no longer introduced, the spring 25 resets and extends, so that the movable lifting ring 22 moves downward and pushes the positioning ball 24 to move toward the axial direction of the positioning column 23, so that a part of the positioning ball 24 is embedded in the slot 51 of the rivet 5, thereby completing the fixation of the rivet 5, and the rivet 5 is a component fixed on the bottom surface of the workpiece fixture for connecting with the chuck body 2.

[0040] Specifically, by Figure 3 It can be seen that a through hole 13 connecting the chuck mounting groove 11 and the telescopic control groove 12 is opened inside the base 1 , and the extension rod 26 is slidably connected to the through hole 13 .

[0041] As can be seen from the above, by providing the through hole 13 , the top plate 314 can push the extension rod 26 when it moves upward.

[0042] Specifically, by Figure 3 It can be seen that a side surface of the ring 312 is provided with an air charging interface 315 communicating with the interior thereof, and the air charging interface 315 and the connecting hose 42 are detachably mounted.

[0043] As can be seen from the above, by providing the inflation interface 315 , it is convenient to replace and disassemble the inflation expansion component 31 .

[0044] Specifically, by Figure 3 It can be seen that the top plate 314 is slidably connected to the inner wall of the telescopic control groove 12 .

[0045] As can be seen from the above, since the top plate 314 slides with the inner wall of the telescopic control slot 12 , the top plate 314 is not prone to deflection.

[0046] Embodiment 2:

[0047] refer to Figure 3 As shown, a stopper 27 is fixedly mounted on the lower surface of the upper fixing plate 21 , and a plug hole 28 penetrating the upper fixing plate 21 and the stopper 27 is formed thereon, and the rivet 5 penetrates the plug hole 28 and extends to the inside of the chuck mounting groove 11 .

[0048] Specifically, by Figure 3 It can be seen that an embedding groove 29 is provided in the middle of the upper surface of the positioning column 23, and slope surfaces are provided on both the inner and outer sides of the upper surface.

[0049] Specifically, by Figure 3 It can be seen that a groove 210 is formed on the upper surface of the movable lifting ring 22 , and the lower end of the spring 25 is fixedly installed at the bottom of the groove 210 .

[0050] As can be seen from the above, by fixing the stop block 27 on the lower surface of the upper fixed plate 21 and providing a sloped surface on the top of the positioning column 23, it is possible to limit the positioning ball 24. By providing an embedding groove 29 for inserting the end of the rivet 5 at the lower part of the slot 51, and by providing a groove 210, excessive compression of the spring 25 can be avoided.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal zero-point positioning clamping device for CNC machine tools, characterized in that: include: A base (1), wherein the upper surface of the base (1) is provided with a chuck mounting groove (11), and the lower surface of the base (1) is provided with a telescopic control groove (12); A chuck body (2), the chuck body (2) comprising an upper fixed plate (21), a movable lifting ring (22), a positioning column (23), a positioning ball (24), a spring (25) and an extension rod (26), the upper fixed plate (21) being fixedly mounted on the upper surface of the base (1) by means of bolts, the movable lifting ring (22) being slidably mounted inside the chuck mounting groove (11), the positioning column (23) being fixedly mounted in the middle of the bottom of the chuck mounting groove (11) by means of bolts, the positioning ball (24) being placed on the upper surface of the positioning column (23) in an annular array, and being in contact with the inclined surface of the inner hole of the movable lifting ring (22), the two ends of the spring (25) being fixedly connected to the upper surface of the movable lifting ring (22) and the lower surface of the upper fixed plate (21) respectively, the extension rod (26) being fixedly mounted on the lower surface of the movable lifting ring (22) in an annular array, and being penetrated into the interior of the telescopic control groove (12); An upper pressure mechanism (3), the upper pressure mechanism (3) comprising an inflatable expansion component (31) and a lower fixed plate (32), the inflatable expansion component (31) comprising a bottom plate (311), a circular ring (312), an expansion ring (313) and a top plate (314), the upper surface of the bottom plate (311) being fixedly connected to the circular ring (312), the lower surface of the expansion ring (313) being fixedly connected to the upper surface of the circular ring (312), the top plate (314) being fixedly connected to the lower surface of the expansion ring (313), the lower fixed plate (32) being fixedly connected to the lower surface of the base (1) by bolts, and being fixedly connected to the bottom plate (311) by bolts; An inflation mechanism (4), the inflation mechanism (4) comprising an inflation pipe joint (41) and a connecting hose (42), the inflation pipe joint (41) being fixedly mounted on an outer wall of one side of the base (1), one end of the connecting hose (42) being connected to the inflation pipe joint (41), and the other end of the connecting hose (42) extending into the interior of the telescopic control groove (12) and connected to the inflation expansion component (31); A pull nail (5), wherein a side surface of the pull nail (5) is provided with a clamping groove (51) for engaging with a positioning ball (24).

2. A universal zero-point positioning clamping device for CNC machine tools according to claim 1, characterized in that: A through hole (13) communicating with the chuck mounting groove (11) and the telescopic control groove (12) is provided inside the base (1), and the extension rod (26) is slidably connected to the through hole (13).

3. The universal zero-point positioning clamping device for CNC machine tools according to claim 1, characterized in that: A gas charging interface (315) communicating with the inside of the circular ring (312) is provided on one side thereof, and the gas charging interface (315) and the connecting hose (42) are detachably mounted.

4. The universal zero-point positioning clamping device for CNC machine tools according to claim 1, characterized in that: The top plate (314) is slidably connected to the inner wall of the telescopic control groove (12).

5. The universal zero-point positioning clamping device for CNC machine tools according to claim 1, characterized in that: A stopper (27) is fixedly mounted on the lower surface of the upper fixing plate (21), and a plug hole (28) penetrating the upper fixing plate (21) and the stopper (27) is provided thereon, and the pull nail (5) penetrates the plug hole (28) and extends to the interior of the chuck mounting groove (11).

6. The universal zero-point positioning clamping device for CNC machine tools according to claim 1, characterized in that: An embedding groove (29) is provided in the middle of the upper surface of the positioning column (23), and slope surfaces are provided on both inner and outer sides of the upper surface.

7. The universal zero-point positioning clamping device for CNC machine tools according to claim 1, characterized in that: The upper surface of the movable lifting ring (22) is provided with a groove (210), and the lower end of the spring (25) is fixedly mounted on the bottom of the groove (210).

Images