Multi-cylinder driven clamping cnc tool clamp

Abstract

The utility model relates to the technical field of multi-station cnc fixtures, in particular to a multi-cylinder driven and clamped cnc tool fixture. The key point of the technical scheme is that the clamp comprises a rotary table, a base table, a clamp and an upper clamping block, the base table is installed on the rotary table, the clamp is fixedly installed on the base table, a workpiece is placed on the base table, the upper clamping block is buckled on the workpiece, the clamp penetrates through the upper clamping block, a locking hole and a positioning hole are formed in the upper clamping block, and a positioning column is installed on the base table. The upper clamping block sleeves the clamping piece through the locking hole, so that the upper clamping block is preliminarily positioned, the upper clamping block is moved, the positioning column on the base table enters the positioning hole in the upper clamping block, at the moment, the upper clamping block is further positioned, and the upper clamping block can be locked when the upper clamping block is placed at an accurate position, so that the efficiency of adjusting the position of the upper clamping block is effectively improved; therefore, time is saved.

Description

Technical Field

[0001] The present application relates to the technical field of multi-station CNC fixtures, and in particular to a CNC tooling fixture driven and clamped by multiple cylinders. Background Art

[0002] CNC is the abbreviation of "computer numerical control". It is an automated machine tool that can be precisely processed and operated through program control. CNC fixtures are the medium of stability and positioning. They are mainly used to correctly fix, support or install workpieces on CNC machine tools. CNC fixtures are widely used in any manufacturing industry that uses CNC processing.

[0003] At present, CNC includes a turntable, a base mounted on the turntable, and a fixture set on the base. The fixture is usually provided in multiple groups, which can clamp multiple workpieces at the same time. CNC can process multiple workpieces at one time, improving the processing efficiency of the workpieces.

[0004] Regarding the above-mentioned related technologies, some clamps require the cooperation of an upper clamp block to fix the workpiece. Since the upper clamp block needs to be buckled on the clamp from top to bottom, it is not convenient to control the upper clamp block to be placed in the correct position at one time. The position of the upper clamp block needs to be constantly adjusted, which wastes a lot of time. Therefore, there is still a lot of room for improvement. Utility Model Content

[0005] In order to reduce the time required for adjusting the upper clamping block, the present application provides a CNC tooling fixture driven by multiple cylinders for clamping.

[0006] The present application provides a CNC tooling fixture with multi-cylinder drive clamping, which adopts the following technical solution:

[0007] A CNC tooling fixture driven and clamped by multiple cylinders comprises a turntable, a base, a fixture and an upper clamping block, wherein the base is arranged on the turntable, a workpiece is placed on the base, the upper clamping block is buckled on the workpiece, the fixture is arranged on the base and is used to fix the upper clamping block, the fixture comprises a pneumatic element and a clamping piece, the pneumatic element is fixedly arranged on the base, the clamping piece passes through the base and is fixedly connected to the pneumatic element; a locking hole is provided on the upper clamping block, the clamping piece passes through the locking hole and is used to fix the upper clamping block; and the fixture also comprises a positioning column, which is fixedly arranged on the base, a positioning hole is provided at a corresponding position of the upper clamping block, and the positioning column is inserted into the positioning hole.

[0008] Through the above technical scheme, the upper clamp block is sleeved on the clamping part through the locking hole, so that the upper clamp block has a preliminary positioning, and the upper clamp block is movable so that the positioning column on the base enters the positioning hole on the upper clamp block. At this time, the upper clamp block is further positioned, and the upper clamp block is placed in the correct position and can be locked. After two positionings, the correct placement of the upper clamp block is achieved, which effectively improves the efficiency of adjusting the position of the upper clamp block, thereby saving time.

[0009] Preferably, the locking hole includes an entry portion and a guide portion, the entry portion is communicated with the guide portion, the clamping member passes through the entry portion and slides into the guide portion, and the clamping member can be clamped in the guide portion and abutted against the upper clamping block to fix the upper clamping block.

[0010] Through the above technical solution, the entry portion enables the upper clamping block to enter the locking range of the clamping member, and the guide portion guides the insertion and cooperation of the upper clamping block and the positioning column, which helps to increase the probability of the positioning column being inserted into the positioning hole.

[0011] Preferably, when the positioning column is accommodated in the positioning hole, the upper clamping block is buckled on the workpiece, and the upper clamping block fixes the workpiece.

[0012] Through the above technical solution, the positioning hole on the upper clamping block is directly opposite to the positioning column on the base, and the upper clamping block is in the correct placement position, which also helps to determine the position of the upper clamping block and saves time in adjusting the position of the upper clamping block.

[0013] Preferably, the base is provided with a plurality of recesses, the contours of the recesses match the contours of the workpiece, and the recesses are used to limit the workpiece.

[0014] Through the above technical solution, the position of the workpiece is determined, which makes it easier to clamp the workpiece with the upper clamping block, thereby improving the processing accuracy of the workpiece.

[0015] Preferably, a positioning protrusion is fixedly provided at the bottom of the recessed position to match the recessed feature on the workpiece.

[0016] Through the above technical solution, the positioning protrusion restricts the workpiece so that the workpiece cannot rotate in the recess, thereby further improving the stability of the workpiece during processing and facilitating improving the processing accuracy.

[0017] Preferably, the top of the positioning column is provided with a chamfer.

[0018] Through the above technical solution, when the chamfer abuts against the upper clamping block, the possibility of mutual friction loss between the positioning column and the upper clamping block is reduced.

[0019] Preferably, the positioning columns may be provided in multiple groups and arranged at intervals on the base.

[0020] Through the above technical solution, the accuracy of the upper clamping block in fixing the workpiece is improved, which helps to improve the processing accuracy.

[0021] Preferably, the clamps are provided in multiple groups and are evenly spaced apart on the base, and the multiple groups of the clamps are used to jointly clamp and fix the upper clamping block.

[0022] Through the above technical solution, multiple sets of clamps clamp the upper clamping block at the same time, which is conducive to uniform force on the upper clamping block, reduces the possibility of deformation of the upper clamping block due to force in one place, and also helps to improve the processing accuracy of the workpiece.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The upper clamping block is put on the clamping piece through the locking hole, so that the upper clamping block has a preliminary positioning. The upper clamping block is moved so that the positioning column on the base enters the positioning hole on the upper clamping block. At this time, the upper clamping block is further positioned. The upper clamping block is placed in the correct position and can be locked. After two positionings, the correct placement of the upper clamping block is achieved, which effectively improves the efficiency of adjusting the position of the upper clamping block and saves time.

[0025] 2. The positioning hole on the upper clamp is directly opposite to the positioning column on the base. The upper clamp is in the correct position, which also helps to determine the position of the upper clamp and saves time in adjusting the position of the upper clamp.

[0026] 3. Multiple sets of clamps clamp the upper clamp at the same time, which is conducive to uniform force on the upper clamp, reducing the possibility of deformation of the upper clamp due to force in one place, and also helping to improve the processing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a CNC tooling fixture driven and clamped by multiple cylinders in a preferred embodiment of the present application.

[0028] Figure 2 It is an exploded view of a CNC tooling fixture driven by multiple cylinders for clamping in a preferred embodiment of the present application.

[0029] Figure 3 yes Figure 2 Enlarged view of part A.

[0030] Figure 4 It is a structural schematic diagram of a locking hole in a preferred embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. turntable; 2. base; 3. fixture; 31. pneumatic element; 32. clamping piece; 4. upper clamping block; 41. positioning hole; 5. recess; 6. positioning protrusion; 7. locking hole; 71. entry part; 72. guide part; 8. positioning column; 9. chamfer. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses a CNC tooling fixture driven by multiple cylinders. Figure 1 The fixture 3 includes a turntable 1, a base 2, a fixture 3 and an upper clamping block 4. The base 2 is installed on the turntable 1, and the fixture 3 is fixedly installed on the base 2. The workpiece is placed on the base 2, and the upper clamping block 4 is buckled on the workpiece. The fixture 3 passes through the upper clamping block 4 and clamps the upper clamping block 4, and the upper clamping block 4 fixes the workpiece.

[0034] refer to Figure 1 A power source is arranged inside the turntable to provide power. The base 2 is a thick plate-like structure, which is arranged horizontally and installed on the turntable 1. The turntable 1 drives the base 2 to rotate. The turntable 1 adds a rotating axis to cooperate with the CNC milling processing.

[0035] refer to Figure 2 and Figure 3 , the manufacturer needs to process a feature hole that completely penetrates the workpiece on the workpiece, and the workpiece needs to be clamped on the base 2. Since the workpiece has no limit on the base 2, if only relying on the upper clamping block 4, the workpiece cannot be fixed well. Therefore, a recess 5 is provided on the base 2, and the workpiece can be placed in the recess 5. Specifically, the recess 5 is a circular groove formed by being recessed downward from the top surface of the base 2. The size of the circular groove is adapted to the size of the workpiece, and the circular groove limits the displacement of the workpiece on the surface of the base 2; a feature hole that penetrates the base 2 is provided on the bottom surface of the circular groove, so that the CNC tool can avoid it when the CNC processes the feature hole on the workpiece; since the workpiece is circular, the workpiece may rotate in the recess 5 during processing, affecting the processing accuracy. Therefore, a positioning protrusion 6 is fixedly provided on the bottom surface of the recess 5, which is located at a corresponding recessed feature on the workpiece. Therefore, when the workpiece is placed in the recess 5, the positioning protrusion 6 cooperates with the workpiece to limit the workpiece, reduce the possibility of the workpiece rotating in the recess 5 during processing, and improve the processing accuracy of the workpiece.

[0036] refer to Figure 2 and Figure 3 In order to improve the processing efficiency of the workpiece, multiple groups of recesses 5 can be provided to place multiple workpieces at a time, for example, two groups, three groups or more than three groups are provided. In the present embodiment, ten groups of recesses 5 are provided, and the ten groups of recesses 5 are divided into two rows, and the two rows of recesses 5 are symmetrically arranged and evenly arranged on the base 2. The CNC processes ten workpieces at a time, which effectively improves the processing efficiency of the workpiece. In other embodiments, the number of recesses 5 can be adjusted according to actual production needs, which can improve the processing efficiency while ensuring the quality of workpiece processing.

[0037] refer to Figure 2 and Figure 3After the workpiece is placed firmly on the base 2, the upper clamping block 4 can be installed. The upper clamping block 4 is fixed by the clamp 3, and the clamp 3 is installed on the base 2. Specifically, the clamp 3 includes a pneumatic element 31 and a clamping member 32, wherein the pneumatic element 31 is installed on the base 2 for outputting linear reciprocating power. In the present embodiment, the pneumatic element 31 is a telescopic cylinder, which is vertically arranged and fixedly installed at the bottom of the base 2, between the two rows of recesses 5. A through hole is provided on the base 2, and the telescopic rod of the telescopic cylinder can pass through the through hole and extend or retract vertically upward; the clamping member 32 is fixedly installed on the telescopic rod of the telescopic cylinder. In the present embodiment, the clamping member 32 is a bolt, which is vertically arranged and installed at the top end of the telescopic rod of the telescopic cylinder through threaded fitting, and passes through the base 2 through the through hole. The telescopic cylinder is used to drive the bolt to move up and down, thereby locking or unlocking the upper clamping block 4. In other embodiments, the clamping member 32 may also be replaced with other parts. Any parts having a stepped structure for abutting against the upper clamping block 4 should fall within the protection scope of this embodiment, and the specific solutions will not be described in detail here.

[0038] refer to Figure 2 and Figure 3 Since the upper clamping block 4 is relatively long as a whole, setting a group of clamps 3 to clamp the upper clamping block 4 may easily cause the upper clamping block 4 to be deformed due to uneven force. Therefore, multiple groups of clamps 3 can be set, such as two groups, three groups or more than three groups. In the present embodiment, five groups of clamps 3 are arranged in a row along the length direction of the base 2, evenly spaced, and fixedly installed on the base 2, located between the two rows of recesses 5. One group of clamps 3 corresponds to the two groups of recesses 5. When the clamps 3 are clamped on the upper clamping block 4, the force is concentrated on the workpiece, which helps to fix the workpiece, and the upper clamping block 4 is evenly stressed as a whole.

[0039] refer to Figure 3 and Figure 4After the workpiece is limited in the horizontal and circumferential directions, the upper clamp block 4 is installed to fix it in the vertical direction. Specifically, the upper clamp block 4 is a plate-like structure, which is horizontally arranged. A characteristic hole is also opened through the upper clamp block 4. When the CNC processes the characteristic hole on the workpiece, the upper clamp block 4 avoids the CNC tool. At the same time, a groove that matches the contour of the workpiece is opened on the abutting surface of the upper clamp block 4 and the workpiece, which cooperates with the concave position 5 to further limit the workpiece. In order to lock the upper clamp block 4 with the clamping member 32, a locking hole 7 is opened on the upper clamp block 4, and the locking hole 7 runs through the upper clamp block 4. Specifically, the locking hole 7 includes an entry portion 71 and a guide portion 72, and the entry portion 71 is connected to the guide portion 72, and the entry portion 71 is The circular hole is slightly larger than the diameter of the bolt head. The bolt passes through the entry portion 71 and penetrates the upper clamping block 4. The upper clamping block 4 is placed flat on the base 2. The guide portion 72 is a long hole, which is connected to the entry portion 71. The width of the long hole is adapted to the diameter of the bolt shaft, that is, the bolt shaft can slide into the guide portion 72. The diameter of the bolt head is larger than the diameter of the bolt shaft. Therefore, the bolt head cannot pass through the guide portion 72. Therefore, when the telescopic rod of the telescopic cylinder is retracted, the bolt head abuts against the upper clamping block 4, thereby clamping the upper clamping block 4 in the vertical direction. Since the clamp 3 is provided with five groups, the corresponding locking holes 7 are also provided with five groups. One group of clamps 3 cooperates with one group of locking holes 7 to fix the upper clamping block 4.

[0040] refer to Figure 3 and Figure 4 In order to enable the upper clamping block 4 to be quickly and accurately buckled on the workpiece, a positioning column 8 is fixedly installed on the base 2. Specifically, the positioning column 8 protrudes from the surface of the base 2, and a positioning hole 41 is opened at the corresponding position of the upper clamp. The bolt head passes through the entry portion 71, and the upper clamping block 4 is slid. The upper bolt rod is located in the guide portion 72 and is in a state to be locked. Then the upper clamping block 4 is continued to be moved so that the positioning hole 41 on the upper clamping block 4 is inserted into the positioning column 8. At this time, the upper clamping block 4 is correctly buckled on the workpiece, and the telescopic rod of the telescopic cylinder can be started to retract, and the upper clamping block 4 is locked and clamped.

[0041] refer to Figure 3 and Figure 4 If only one group of positioning posts 8 is provided, after the positioning posts 8 enter the positioning holes 41, it is necessary to slightly adjust the upper clamping block 4 to correctly engage with the workpiece, which wastes time. Therefore, multiple groups of positioning posts 8 may be provided, such as two, three or more groups. In the present embodiment, two groups of positioning posts 8 are provided, and the two groups of positioning posts 8 are arranged at intervals. Correspondingly, two groups of positioning holes 41 are also provided on the upper clamping block 4. Two points confirm a straight line. When both positioning posts 8 enter the corresponding positioning holes 41, the upper clamping block 4 is in a state of correctly engaging with the workpiece, saving the time for adjusting the upper clamping block 4.

[0042] In order to reduce the mutual wear between the upper clamping block 4 and the positioning column 8 as much as possible, a chamfer 9 is provided on the top of the positioning column 8. The chamfer 9 reduces the scratches between the upper clamping block 4 and the chamfer 9 also has a certain guiding effect, guiding the positioning hole 41 on the upper clamping block 4 to be sleeved on the positioning column 8, which is also conducive to saving time for adjusting the upper clamping block 4.

[0043] The implementation principle of a multi-cylinder driven clamping CNC tooling fixture in the embodiment of the present application is as follows: a base 2 is installed on a turntable 1, a limited workpiece recess 5 is provided on the base 2, a fixture 3 is fixedly installed on the base 2 and passes through the base 2, a positioning column 8 is fixedly installed on the base 2, a locking hole 7 is provided on the upper clamping block 4, the upper clamping block 4 is buckled on the workpiece, and the fixture 3 passes through the locking hole 7 and locks the upper clamping block 4.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A CNC tooling fixture driven by multiple cylinders, comprising a turntable (1), a base (2), a fixture (3) and an upper clamping block (4), wherein the base (2) is arranged on the turntable (1), a workpiece is placed on the base (2), the upper clamping block (4) is buckled on the workpiece, and the fixture (3) is arranged on the base (2) for fixing the upper clamping block (4), characterized in that: The clamp (3) includes a pneumatic element (31) and a clamping member (32), wherein the pneumatic element (31) is fixedly arranged on the base (2), and the clamping member (32) passes through the base (2) and is fixedly connected to the pneumatic element (31); a locking hole (7) is provided on the upper clamping block (4), and the clamping member (32) passes through the locking hole (7) to fix the upper clamping block (4); and further includes a positioning column (8), wherein the positioning column (8) is fixedly arranged on the base (2), and a positioning hole (41) is provided at a corresponding position of the upper clamping block (4), and the positioning column (8) is inserted into the positioning hole (41).

2. A CNC fixture with multi-cylinder drive clamping according to claim 1, characterized in that: The locking hole (7) comprises an entry portion (71) and a guide portion (72); the entry portion (71) is communicated with the guide portion (72); the clamping member (32) passes through the entry portion (71) and slides into the guide portion (72); the clamping member (32) can be clamped in the guide portion (72) and abutted against the upper clamping block (4) for fixing the upper clamping block (4).

3. The multi-cylinder driven clamping CNC fixture according to claim 1, characterized in that: When the positioning column (8) is accommodated in the positioning hole (41), the upper clamping block (4) is buckled onto the workpiece, and the upper clamping block (4) fixes the workpiece.

4. The CNC fixture with multi-cylinder drive clamping according to claim 1 is characterized in that: The base (2) is provided with a plurality of recessed positions (5), the contours of the recessed positions (5) being adapted to the contour of the workpiece, and the recessed positions (5) being used to limit the position of the workpiece.

5. A CNC fixture with multi-cylinder drive clamping according to claim 4, characterized in that: A positioning protrusion (6) is fixedly arranged at the bottom of the recess (5) and is adapted to the recessed feature on the workpiece.

6. The CNC fixture with multi-cylinder drive clamping according to claim 1, characterized in that: The top of the positioning column (8) is provided with a chamfer (9).

7. The CNC fixture with multi-cylinder drive clamping according to claim 6 is characterized in that: The positioning columns (8) may be provided in multiple groups and arranged at intervals on the base (2).

8. The CNC fixture with multi-cylinder drive clamping according to claim 1, characterized in that: The clamps (3) are provided in multiple groups and are evenly spaced on the base (2); the multiple groups of clamps (3) are used to clamp and fix the upper clamping block (4) together.

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