Clamping jig for CNC machining

Abstract

The utility model belongs to the technical field of clamping jigs, and particularly relates to a clamping jig for CNC (computer numerical control) machining, which comprises a jig base, a positioning and supporting assembly and a clamping assembly, the positioning and supporting assembly comprises a positioning vertical plate, a positioning groove is machined at the top end of the positioning vertical plate, and the clamping assembly comprises a movable support, a movable base and a movable base. A rotating cylinder; the roll-over stand is fixed on the rotating table of the rotating cylinder; the pneumatic clamping jaw is fixedly arranged on the overturning frame; a horizontal power assembly; the lifting power assembly is connected to the rotating air cylinder in a drivable mode and used for driving the overturning frame to move in the vertical direction. According to the metal plate turning-over device, the position of a metal plate is positioned through the positioning and supporting assembly, the metal plate is supported at the same time, the metal plate is clamped through the clamping assembly, the stability of the metal plate is ensured, the metal plate can be turned over automatically through the clamping assembly, different faces of the metal plate can be machined conveniently, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping fixtures, and particularly relates to a clamping fixture for CNC machining. Background Art

[0002] CNC, that is, a numerically controlled machine tool, is short for a numerically controlled machine tool, which is an automated machine tool equipped with a program control system. This control system can logically process a program with control codes or other symbolic instructions, decode it, represent it in coded numbers, input it into the numerical control device through an information carrier, and after arithmetic processing, the numerical control device issues various control signals to control the actions of the machine tool, and automatically processes parts according to the shape and size required by the drawing.

[0003] When machining parts on a numerically controlled machine tool, it is necessary to use a clamping fixture to clamp the parts. For example, when engraving a plate, it is necessary to use a clamping fixture to clamp and fix the plate in advance to ensure the stability of the plate material.

[0004] It is retrieved that in the prior art, the Chinese utility model patent with the authorization announcement number of CN220480980U discloses "a clamping fixture for medium plates of magnesium alloy", which includes a fixture base, a fixture table, an electro-hydraulic holder body, and a lower pressing plate. A positioning mechanism is arranged below the lower pressing plate. The positioning mechanism includes a positioning plate, a holding seat, a side pressing plate, an auxiliary pressure stabilizing block, a holding column, a pressing rod, a holding end, and an assembling rod, and has a better fixing effect on the metal plate, and the fixing of the metal plate is more accurate and fast.

[0005] The clamping fixtures in the prior art including the above-mentioned one, although having excellent fixing effects, when actually used, after the metal plate is clamped, only the top surface of the metal plate can be machined. If it is necessary to machine the bottom surface of the metal plate, the metal plate needs to be turned over and reclamped, resulting in low efficiency.

[0006] To solve the above problems, a clamping fixture for CNC machining is proposed in this application. Utility Model Content

[0007] To solve the above problems existing in the prior art, the utility model provides a clamping fixture for CNC machining, which has the characteristics of convenient use and high machining efficiency.

[0008] To achieve the above object, the utility model provides the following technical solution: A clamping fixture for CNC machining, including a fixture base, two groups of symmetrically fixed positioning and supporting components on the fixture base, and two groups of symmetrically fixed clamping components on the fixture base. The positioning and supporting components include positioning vertical plates, and positioning grooves are machined at the tops of the positioning vertical plates. The clamping components include:

[0009] The movable support, the movable support is connected to the fixture base and has a moving degree of freedom in the horizontal direction;

[0010] The rotary cylinder, the rotary cylinder is connected to the movable support and has a moving degree of freedom in the vertical direction;

[0011] The turnover frame, the turnover frame is fixed on the rotating table of the rotary cylinder;

[0012] The pneumatic gripper, the pneumatic gripper is fixed on the turnover frame and is used for clamping the metal plate;

[0013] The horizontal power assembly, the horizontal power assembly is drivingly connected to the movable support and is used for driving the movable support to move in the horizontal direction;

[0014] The lifting power assembly, the lifting power assembly is drivingly connected to the rotary cylinder and is used for driving the turnover frame to move in the vertical direction.

[0015] As a preferred technical solution of the present utility model, the positioning and supporting assembly further includes:

[0016] The first fixed bottom plate, the first fixed bottom plate is fixed on the fixture base, and a waist-shaped hole is machined on the first fixed bottom plate, and the positioning vertical plate is fixed on the first fixed bottom plate.

[0017] As a preferred technical solution of the present utility model, the horizontal power assembly includes:

[0018] The second fixed bottom plate, the second fixed bottom plate is fixed on the fixture base;

[0019] The first slider, the first slider is located above the second fixed bottom plate, and the movable support is fixed on the first slider;

[0020] The first fixing plate, two of the first fixing plates are symmetrically fixed on the second fixed bottom plate;

[0021] The first threaded lead screw, the first threaded lead screw is rotatably installed between the two first fixing plates, and the first threaded lead screw passes through the first slider and is connected to the first slider by screw thread engagement;

[0022] The first servo motor, the first servo motor is fixed on the first fixing plate and is used for driving the first threaded lead screw to rotate.

[0023] As a preferred technical solution of the present utility model, the horizontal power assembly further includes:

[0024] The first guiding rod, two of the first guiding rods are symmetrically fixed between the two first fixing plates, and the first guiding rod penetrates through the first sliding block.

[0025] As a preferred technical solution of the present utility model, the lifting power assembly includes:

[0026] The second sliding block, the second sliding block is located on one side of the movable bracket, and the rotary cylinder is fixed on the second sliding block;

[0027] The second fixing plate, two of the second fixing plates are symmetrically fixed on the movable bracket;

[0028] The second threaded lead screw, the second threaded lead screw is rotatably installed between the two second fixing plates, and the second threaded lead screw penetrates through the second sliding block and is connected to the second sliding block by screw thread engagement;

[0029] The second servo motor, the second servo motor is fixed on the second fixing plate and is used to drive the second threaded lead screw to rotate.

[0030] As a preferred technical solution of the present utility model, the lifting power assembly further includes:

[0031] The second guiding rod, two of the second guiding rods are symmetrically fixed between the two second fixing plates, and the second guiding rod penetrates through the second sliding block.

[0032] As a preferred technical solution of the present utility model, two of the pneumatic grippers are symmetrically fixed on the flipping frame.

[0033] As a preferred technical solution of the present utility model, it further includes:

[0034] The rubber block, rubber blocks are fixed on the opposite surfaces of the two jaws of the pneumatic gripper.

[0035] Compared with the prior art, the beneficial effects of the present utility model are:

[0036] In the present utility model, the position of the metal plate is positioned by the positioning and supporting assembly, and the metal plate is supported at the same time. The metal plate is clamped by the clamping assembly to ensure the stability of the metal plate, and the metal plate can be automatically turned over by the clamping assembly, which is convenient for processing different surfaces of the metal plate and improves the processing efficiency.

[0037] Other additional advantages and beneficial effects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0038] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the accompanying drawings:

[0039] Figure 1 is a schematic structural diagram of the present utility model;

[0040] Figure 2 is an axonometric structural diagram of the positioning and supporting assembly in the present utility model;

[0041] Figure 3 is an axonometric structural diagram of the clamping assembly in the present utility model;

[0042] Figure 4 is the present utility model Figure 3 an enlarged structural diagram of part A therein.

[0043] In the figure: 1, fixture base; 2, positioning and supporting assembly; 21, first fixed base plate; 211, waist-shaped hole; 22, positioning vertical plate; 221, positioning groove; 3, clamping assembly; 31, movable bracket; 32, rotary cylinder; 33, turning frame; 34, pneumatic gripper; 35, horizontal power assembly; 351, second fixed base plate; 352, first slider; 353, first fixed plate; 354, first threaded lead screw; 355, first servo motor; 356, first guide rod; 36, lifting power assembly; 361, second slider; 362, second fixed plate; 363, second threaded lead screw; 364, second servo motor; 365, second guide rod; 4, rubber block. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0045] Please refer to Figures 1-4 , the present utility model provides the following technical solutions: A clamping fixture for CNC machining, including a fixture base 1, two groups of symmetrically fixed positioning and supporting assemblies 2 on the fixture base 1, and two groups of symmetrically fixed clamping assemblies 3 on the fixture base 1. The positioning and supporting assembly 2 includes a positioning vertical plate 22, and a positioning groove 221 is processed at the top of the positioning vertical plate 22. The clamping assembly 3 includes: a movable bracket 31, a rotary cylinder 32, a turning frame 33, a pneumatic gripper 34, a horizontal power assembly 35, and a lifting power assembly 36.

[0046] Further, as shown by Figures 1-3 In this embodiment, the movable bracket 31 is connected to the fixture base 1 and has a moving degree of freedom in the horizontal direction. The rotating cylinder 32 is connected to the movable bracket 31 and has a moving degree of freedom in the vertical direction. The flipping frame 33 is fixed on the rotating table of the rotating cylinder 32, and the pneumatic gripper 34 is fixed on the flipping frame 33 for gripping the metal plate. The horizontal power assembly 35 is drivably connected to the movable bracket 31 for driving the movable bracket 31 to move in the horizontal direction. The lifting power assembly 36 is drivably connected to the rotating cylinder 32 for driving the flipping frame 33 to move in the vertical direction. After adopting the above scheme, during use, first place the metal plate to be processed on the positioning vertical plate 22, position the metal plate through the positioning groove 221, and support the metal plate through the positioning vertical plate 22. Then use the pneumatic gripper 34 to grip the metal plate to ensure the stability of the metal plate. Finally, process the metal plate through the CNC. When it is necessary to turn over the metal plate, first start the lifting power assembly 36 to drive the flipping frame 33 to rise, so that the metal plate rises. Then start the rotating cylinder 32. The rotating cylinder 32 drives the flipping frame 33 to flip, and drives the metal plate to flip through the pneumatic gripper 34, so that the metal plate is turned over. After the turning over is completed, start the lifting power assembly 36 again to drive the flipping frame 33 to move down, place the metal plate back on the positioning vertical plate 22, support the metal plate through the positioning vertical plate 22, and then use the CNC to process the metal plate again. The utility model positions the position of the metal plate through the positioning and supporting component 2, supports the metal plate at the same time, grips the metal plate through the clamping component 3 to ensure the stability of the metal plate, and can automatically turn over the metal plate through the clamping component 3, which is convenient for processing different surfaces of the metal plate and improves the processing efficiency.

[0047] Preferably, as shown by Figure 1 and Figure 2 In this embodiment, the positioning and supporting component 2 further includes: a first fixed bottom plate 21. The first fixed bottom plate 21 is fixed on the fixture base 1, and a waist-shaped hole 211 is machined on the first fixed bottom plate 21. The positioning vertical plate 22 is fixed on the first fixed bottom plate 21. After adopting the above scheme, the first fixed bottom plate 21 is fixed on the fixture base 1 with bolts, and through the provided waist-shaped hole 211, the installation position of the positioning vertical plate 22 can be adjusted according to the width of the metal plate.

[0048] Optionally, as shown by Figure 1 and Figure 3As shown, in this embodiment, the horizontal power assembly 35 includes: a second fixed base plate 351, a first slider 352, a first fixed plate 353, a first threaded lead screw 354, and a first servo motor 355. The second fixed base plate 351 is fixed on the fixture base 1. The first slider 352 is located above the second fixed base plate 351. The movable bracket 31 is fixed on the first slider 352. Two first fixed plates 353 are symmetrically fixed on the second fixed base plate 351. The first threaded lead screw 354 is rotatably installed between the two first fixed plates 353, and the first threaded lead screw 354 passes through the first slider 352 and is connected to the first slider 352 by screw thread engagement. The first servo motor 355 is fixed on the first fixed plate 353 and is used to drive the first threaded lead screw 354 to rotate. After adopting the above solution, by driving the first threaded lead screw 354 to rotate by the first servo motor 355, under the screw thread engagement action, the movable bracket 31 is driven by the first slider 352 to move horizontally, so as to drive the pneumatic gripper 34 to move horizontally. After the metal plate is placed on the positioning vertical plate 22, the first servo motor 355 is started to make the pneumatic gripper 34 approach the metal plate. When the two jaws of the pneumatic gripper 34 move to the upper and lower sides of the metal plate, the pneumatic gripper 34 is started to clamp the metal plate.

[0049] It should be noted that the horizontal power assembly 35 can also be used to adjust the horizontal distance between the two groups of pneumatic grippers 34, which is applicable to metal plates of different lengths.

[0050] Preferably, Figure 1 and Figure 3 As shown, in this embodiment, the horizontal power assembly 35 further includes: a first guide rod 356. Two first guide rods 356 are symmetrically fixed between the two first fixed plates 353, and the first guide rod 356 passes through the first slider 352. After adopting the above solution, the two first guide rods 356 provided are used to guide the first slider 352 to improve the stability of the first slider 352.

[0051] Optionally, Figure 1 and Figure 3As shown, in this embodiment, the lifting power assembly 36 includes: a second slider 361, a second fixed plate 362, a second threaded screw 363, and a second servo motor 364. The second slider 361 is located on one side of the movable bracket 31, and the rotary cylinder 32 is fixed on the second slider 361. Two second fixed plates 362 are symmetrically fixed on the movable bracket 31. The second threaded screw 363 is rotatably installed between the two second fixed plates 362, and the second threaded screw 363 passes through the second slider 361 and is connected to the second slider 361 by screw engagement. The second servo motor 364 is fixed on the second fixed plate 362 and is used to drive the second threaded screw 363 to rotate. After adopting the above solution, by driving the second threaded screw 363 to rotate by the second servo motor 364, under the screw engagement action, the second slider 361 drives the rotary cylinder 32 to move in the vertical direction, so as to drive the pneumatic gripper 34 to move in the vertical direction. When the metal plate needs to be turned over, the second servo motor 364 is started, and the metal plate is dragged up by the pneumatic gripper 34. After the metal plate is turned over, the second servo motor 364 is started again to place the metal plate back on the positioning vertical plate 22, and the metal plate is supported by the positioning vertical plate 22.

[0052] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the lifting power assembly 36 further includes: a second guide rod 365. Two second guide rods 365 are symmetrically fixed between the two second fixed plates 362, and the second guide rod 365 passes through the second slider 361. After adopting the above solution, the two second guide rods 365 provided are used to guide the second slider 361 to improve the stability of the second slider 361.

[0053] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the two pneumatic grippers 34 are symmetrically fixed on the flipping frame 33. After adopting the above solution, the two pneumatic grippers 34 clamp the metal plate simultaneously from the same side, and the stability performance is higher.

[0054] Preferably, by Figure 1 、 Figure 3 and Figure 4 As shown, in this embodiment, it further includes: a rubber block 4. Rubber blocks 4 are fixed on the opposite surfaces of the two jaws of the pneumatic gripper 34. The rubber block 4 has flexibility and clamps the metal plate flexibly to avoid scratching the metal plate caused by rigid clamping.

[0055] It should be noted that the rotary cylinder 32, the pneumatic gripper 34, the first servo motor 355, and the second servo motor 364 are all commercially available conventional devices with built-in power switches. Those skilled in the art can make conventional selections according to actual needs. Their working principles are common knowledge well-known to those skilled in the art and have been fully disclosed by the prior art, so they will not be elaborated here.

[0056] The circuit connection involved in the present utility model is a common means adopted by those skilled in the art and can obtain technical inspiration through a limited number of experiments, belonging to the prior art that is widely used.

[0057] The components not described in detail in this article are prior art.

[0058] Working principle and usage process of the present utility model: When the clamping fixture of the present utility model is in use, first place the metal plate to be processed on the positioning vertical plate 22, position the metal plate through the positioning groove 221, and support the metal plate by the positioning vertical plate 22;

[0059] Then start the first servo motor 355 to make the pneumatic gripper 34 approach the metal plate. When the two jaws of the pneumatic gripper 34 move to the upper and lower sides of the metal plate, the pneumatic gripper 34 is activated to clamp the metal plate to ensure the stability of the metal plate, and finally process the metal plate through the CNC;

[0060] When it is necessary to turn over the metal plate, first start the lifting power component 36 to drive the flipping frame 33 to rise, so that the metal plate rises. Then start the rotary cylinder 32. The rotary cylinder 32 drives the flipping frame 33 to flip, and drives the metal plate to flip through the pneumatic gripper 34 to turn over the metal plate. After the flipping is completed, start the lifting power component 36 again to drive the flipping frame 33 to move down, place the metal plate back on the positioning vertical plate 22, support the metal plate by the positioning vertical plate 22, and then use the CNC to process the metal plate again;

[0061] The present utility model positions the position of the metal plate through the positioning and supporting component 2 and supports the metal plate at the same time, clamps the metal plate through the clamping component 3 to ensure the stability of the metal plate, and can automatically turn over the metal plate through the clamping component 3, which is convenient for processing different surfaces of the metal plate and improves the processing efficiency.

[0062] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A clamping fixture for CNC machining, comprising a fixture base (1), two groups of positioning support components (2) symmetrically fixed on the fixture base (1), and two groups of clamping components (3) symmetrically fixed on the fixture base (1), wherein the positioning support component (2) comprises a positioning vertical plate (22), and a positioning groove (221) is processed at the top of the positioning vertical plate (22), characterized in that: The clamping assembly (3) comprises: A movable bracket (31), the movable bracket (31) being connected to the fixture base (1) and having a degree of freedom of movement in a horizontal direction; A rotating cylinder (32), the rotating cylinder (32) being connected to the movable bracket (31) and having a degree of freedom of movement in a vertical direction; A turning frame (33), wherein the turning frame (33) is fixed on a rotating table of the rotating cylinder (32); A pneumatic clamp (34), the pneumatic clamp (34) being fixed on the turning frame (33) and used for clamping a metal plate; A horizontal power assembly (35), the horizontal power assembly (35) being drivably connected to the movable support (31) and used for driving the movable support (31) to move in a horizontal direction; A lifting power assembly (36), wherein the lifting power assembly (36) is drivably connected to the rotary cylinder (32) and is used to drive the turning frame (33) to move in a vertical direction.

2. A clamping fixture for CNC machining according to claim 1, characterized in that: The positioning support assembly (2) further comprises: A No. 1 fixed base plate (21), the No. 1 fixed base plate (21) is fixed on the fixture base (1), and a waist-shaped hole (211) is processed on the No. 1 fixed base plate (21), and the positioning vertical plate (22) is fixed on the No. 1 fixed base plate (21).

3. The clamping fixture for CNC machining according to claim 1, characterized in that: The horizontal power assembly (35) comprises: A second fixed base plate (351), the second fixed base plate (351) being fixed on the fixture base (1); A first slider (352), the first slider (352) is located on the upper part of the second fixed bottom plate (351), and the movable bracket (31) is fixed on the first slider (352); A No. 1 fixing plate (353), wherein two No. 1 fixing plates (353) are symmetrically fixed on the No. 2 fixing bottom plate (351); A No. 1 threaded screw (354), the No. 1 threaded screw (354) is rotatably mounted between the two No. 1 fixing plates (353), and the No. 1 threaded screw (354) passes through the No. 1 slider (352) and is connected to the No. 1 slider (352) by means of a threaded engagement; A No. 1 servo motor (355), the No. 1 servo motor (355) is fixed on the No. 1 fixing plate (353), and is used to drive the No. 1 threaded screw (354) to rotate.

4. The clamping fixture for CNC machining according to claim 3, characterized in that: The horizontal power assembly (35) further comprises: A No. 1 guide rod (356), wherein two No. 1 guide rods (356) are symmetrically fixed between the two No. 1 fixing plates (353), and the No. 1 guide rod (356) passes through the No. 1 sliding block (352).

5. The clamping fixture for CNC machining according to claim 1, characterized in that: The lifting power assembly (36) comprises: A second slider (361), the second slider (361) is located on one side of the movable bracket (31), and the rotary cylinder (32) is fixed on the second slider (361); A second fixing plate (362), wherein two second fixing plates (362) are symmetrically fixed on the movable bracket (31); A No. 2 threaded screw (363), the No. 2 threaded screw (363) is rotatably mounted between the two No. 2 fixing plates (362), and the No. 2 threaded screw (363) passes through the No. 2 slider (361) and is connected to the No. 2 slider (361) by means of a threaded engagement; A No. 2 servo motor (364), the No. 2 servo motor (364) is fixed on the No. 2 fixed plate (362), and is used to drive the No. 2 threaded screw (363) to rotate.

6. The clamping fixture for CNC machining according to claim 5, characterized in that: The lifting power assembly (36) further comprises: A No. 2 guide rod (365), wherein the two No. 2 guide rods (365) are symmetrically fixed between the two No. 2 fixing plates (362), and the No. 2 guide rods (365) penetrate the No. 2 sliding block (361).

7. The clamping fixture for CNC machining according to claim 1, characterized in that: The two pneumatic clamps (34) are symmetrically fixed on the turning frame (33).

8. The clamping fixture for CNC machining according to claim 1, characterized in that: Also includes: A rubber block (4) is fixed on opposite surfaces of the two pneumatic grippers of the pneumatic gripper (34).

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