Computerized numerical control (CNC) pneumatic tool clamp capable of achieving firm positioning

Abstract

The utility model belongs to the technical field of pneumatic fixtures, and particularly discloses a CNC pneumatic tool fixture firm in positioning. The clamp comprises a base, a plurality of sets of clamps are arranged on the top of the base, the number of each set of clamps is two, a bottom plate is arranged at the bottom of each set of clamps, an auxiliary positioning assembly is arranged in each bottom plate, machining precision is guaranteed through the auxiliary positioning assemblies, and when the clamps are abraded due to long-term use, clamping force is attenuated, and the clamping force is reduced. The auxiliary clamping blocks can intervene in time to stably fix a workpiece from the two sides of the bottom, fine displacement generated by the workpiece is effectively counteracted, it is ensured that the machining size is accurate, the production efficiency is further improved through the auxiliary positioning assembly, and time and labor are consumed due to the fact that a clamp needs to be shut down to be manually adjusted or replaced after being abraded in the past. Nowadays, by means of the arrangement of a pressure sensor and a micro air cylinder, clamping force can be automatically compensated, the shutdown frequency and duration are reduced, and a production line can continuously and efficiently operate.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pneumatic clamps, in particular to a CNC pneumatic tooling clamp with firm positioning. BACKGROUND

[0002] The CNC pneumatic tooling clamp is a kind of tooling clamp used in a computer numerical control machining environment, which uses compressed air as a power source to drive the clamp to act. The CNC pneumatic tooling clamp mainly comprises a cylinder, a gas pipe, a joint, a clamp body, a clamping jaw and the like. The cylinder receives compressed air from the air source, and the power is transmitted through the gas pipe and the joint to drive the clamping jaw to realize precise positioning and clamping of the workpiece through the support structure of the clamp body.

[0003] After the existing pneumatic clamp is used for a long time, the surface will inevitably be worn, which will cause the firmness to decrease when the workpiece is fixed. Since the workpiece is difficult to be stably fixed, the machining size will deviate, and the scrap rate of the product will greatly increase due to the tiny error. In addition, the workpiece will be loosened during the machining process, and it is necessary to frequently stop and readjust the clamping, which will waste a lot of valuable time and make the overall production progress lag. At the same time, the loosened workpiece will suddenly fly off at any time in the high-speed machining environment, which will easily cause accidents and injuries. If the workpiece hits the key parts of the equipment, not only will the expensive equipment be damaged, but also the subsequent maintenance will be time-consuming and laborious, and the normal production and operation of the enterprise will be seriously affected. CONTENT OF THE INVENTION

[0004] In order to solve the above problems, the application provides a CNC pneumatic tooling clamp with firm positioning.

[0005] The CNC pneumatic tooling clamp with firm positioning provided by the application adopts the following technical scheme:

[0006] The CNC pneumatic tooling clamp with firm positioning comprises a base, a plurality of clamps are arranged on the top of the base, the number of clamps in each group is two, a bottom plate is arranged at the bottom of each group of clamps, and an auxiliary positioning assembly is arranged in each bottom plate.

[0007] The auxiliary positioning assembly comprises auxiliary clamping blocks, the number of auxiliary clamping blocks is two, each auxiliary clamping block is arranged at the bottom of the corresponding clamp, and each auxiliary clamping block is used for auxiliary fixing of the workpiece when the clamp is worn.

[0008] Further, a cavity is formed in the inside of each bottom plate, a micro air cylinder is fixedly connected to one side of the inside of each bottom plate, a driving block is fixedly connected to the output end of each micro air cylinder, and the two sides of each driving block are inclined.

[0009] Further, two auxiliary clamping blocks are respectively arranged at the inner sides of the corresponding bottom plates, and one side of each auxiliary clamping block is fixedly connected with a moving block.

[0010] Further, one side of each moving block close to the corresponding driving block is arranged in an inclined manner, and the structure of each driving block is matched with the structure of the corresponding moving block.

[0011] Further, the inner bottom wall of each bottom plate is provided with two sliding grooves, the bottom of each moving block is slidably connected with the corresponding sliding groove, one side of each sliding groove is fixedly connected with a spring, and one end of each spring is fixedly connected with one side of the corresponding moving block.

[0012] Further, one side of each clamp is provided with a pressure sensor, and the pressure sensor is electrically connected with the micro air cylinder.

[0013] Through the above technical scheme, the machining precision can be guaranteed.

[0014] Further, the top of the base is provided with a plurality of fixed plates, one side of each fixed plate is provided with a placing groove, and the plurality of placing grooves are one-to-one corresponding to the plurality of clamps.

[0015] Further, one side of each clamp and auxiliary clamping block is provided with a protective pad, and each protective pad is made of an elastic material.

[0016] Through the above technical scheme, the impact force during clamping can be buffered.

[0017] In summary, the present application has at least one of the following beneficial technical effects:

[0018] The utility model discloses a auxiliary positioning assembly guarantees the machining precision, when the clamping force decays due to the long -term use abrasion of clamp, auxiliary clamping block can intervene in time, and the workpiece is stably fixed from the both sides of the bottom, and the slight displacement of workpiece is effectively offset, and the machining size is accurately ensured, and the production efficiency is also improved through the auxiliary positioning assembly, and the clamp needs to be adjusted or replaced manually after the abrasion of the clamp in the past, and time and effort are consumed, now, with the setting of pressure sensor and micro air cylinder, the clamping force can be automatically compensated, the shutdown frequency and length of time are reduced, the production line can be continuously and efficiently operated, simultaneously, the production cost is also reduced, the scrap rate caused by the machining precision not reaching the standard is reduced, the raw material waste is avoided, and the manual intervention cost and equipment maintenance cost are reduced, the abrasion clamp does not need to be frequently disassembled and replaced, and the service life of the overall clamp is prolonged. ACCURACY

[0019] Figure 1 It is the overall structure schematic view of the utility model;

[0020] Figure 2 It is the overall structure schematic view of the fixed plate of the utility model;

[0021] Figure 3 It is the overall structure schematic view of the clamp of the utility model;

[0022] Figure 4 It is the internal structure schematic view of the bottom plate of the utility model;

[0023] Figure 5 It is the internal structure plan view of the bottom plate of the utility model.

[0024] Mark 1, base; 2, clamp; 3, bottom plate; 4, micro-cylinder; 5, drive block; 6, auxiliary clamp block; 7, moving block; 8, sliding slot; 9, spring; 10, protective pad; 11, pressure sensor; 12, fixed plate; 13, placing groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Referring to Figures 1-5 A positioning firm CNC pneumatic tooling fixture, comprising a base 1, the top of the base 1 is provided with a plurality of sets of clamps 2, the number of each set of clamps 2 is set to two, the bottom of each set of clamps 2 is provided with a bottom plate 3, and the inside of each bottom plate 3 is provided with an auxiliary positioning assembly.

[0027] The auxiliary positioning assembly comprises auxiliary clamp blocks 6, the number of the auxiliary clamp blocks 6 is set to two, each auxiliary clamp block 6 is located at the bottom of the corresponding clamp 2, and each auxiliary clamp block 6 is used for auxiliary fixing of a workpiece when the clamp 2 is worn.

[0028] Referring to Figures 1-5The inside of each bottom plate 3 is provided with a cavity, one side of the inside of each bottom plate 3 is fixedly connected with a micro cylinder 4, the output end of each micro cylinder 4 is fixedly connected with a driving block 5, both sides of each driving block 5 are inclined, two auxiliary clamping blocks 6 are respectively located on both sides of the inside of the corresponding bottom plate 3, one side of each auxiliary clamping block 6 is fixedly connected with a moving block 7, one side of each moving block 7 close to the corresponding driving block 5 is inclined, the structure of each driving block 5 is respectively matched with the structure of the corresponding moving block 7, the inner bottom wall of each bottom plate 3 is provided with two sliding grooves 8, the bottom of each moving block 7 is slidably connected with the corresponding sliding groove 8, one side of each sliding groove 8 is fixedly connected with a spring 9, one end of each spring 9 is respectively fixedly connected with one side of the corresponding moving block 7, one side of each clamp 2 is provided with a pressure sensor 11, and the pressure sensor 11 is electrically connected with the micro cylinder 4.

[0029] When the clamp 2 is worn, the pressure sensor 11 (the pressure sensor 11 is prior art and will not be described here) can first perceive the change of the clamping force of the clamp 2 on the workpiece, since the pressure sensor 11 is electrically connected with the micro cylinder 4, once the pressure is lower than the preset threshold, the pressure sensor 11 will send an electrical signal to the micro cylinder 4, after receiving the signal, the output end of the micro cylinder 4 will drive the block 5 to move, because the two sides of the driving block 5 are inclined and matched with the inclined structure of one side of the moving block 7, with the advancement of the driving block 5, the moving block 7 will be squeezed to slide along the sliding groove 8, in this process, the spring 9 is stretched, and the moving block 7 drives the auxiliary clamping block 6 to approach the workpiece, the two auxiliary clamping blocks 6 assist in clamping the workpiece from both sides of the bottom of the clamp 2, thereby making up for the insufficient clamping force caused by the wear of the clamp 2, ensuring that the workpiece can still be firmly fixed during machining, and ensuring the precision and stability of CNC machining.

[0030] The auxiliary positioning assembly ensures the machining precision, when the clamping force of the clamp 2 is attenuated due to long-term use and wear, the auxiliary clamping block 6 can intervene in time to stably fix the workpiece from both sides of the bottom, effectively offsetting the slight displacement of the workpiece, ensuring the accuracy of the machining size, and the auxiliary positioning assembly also improves the production efficiency, the clamp 2 needs to be manually adjusted or replaced after wear in the past, which is time-consuming and laborious, now with the help of the pressure sensor 11 and the micro cylinder 4, the clamping force can be automatically compensated, the downtime is reduced, the production line can continue to run efficiently, the production cost is also reduced, the scrap rate caused by the unqualified machining precision is reduced, the raw material waste is avoided, and the labor intervention cost and equipment maintenance cost are reduced, without frequent disassembly and replacement of the worn clamp 2, the service life of the overall clamp 2 is prolonged.

[0031] Reference Figures 1-4The top of the base 1 is provided with a plurality of fixing plates 12, one side of each fixing plate 12 is provided with a placing groove 13, a plurality of placing grooves 13 are arranged in one-to-one correspondence with a plurality of clamps 2, one side of each clamp 2 and auxiliary clamping block 6 is provided with a protective pad 10, and each protective pad 10 is made of elastic material.

[0032] Through the arrangement of the placing groove 13, the workpiece clamping process is optimized, the efficiency is improved, and the stability of the CNC machining is guaranteed, and through the protective pad 10 arranged on one side of the clamp 2 and the auxiliary clamping block 6, the impact force during clamping can be buffered to avoid damaging the workpiece surface, and the workpiece can be further stabilized during the machining process. Small vibration of the workpiece positioning.

[0033] Working principle: first, the workpiece is placed in the corresponding placing groove 13 on the top of the base 1, the placing groove 13 accurately positions the workpiece, which is convenient for subsequent clamp 2 fast clamping, the clamp 2 is driven by pneumatic, the compressed air provided by the air source enters the cylinder (this is prior art, not shown in the figure), pushes the piston to drive the clamp 2 to act, realizes the preliminary clamping of the workpiece, when the clamp 2 is worn due to long-term frequent use, the clamping force is lower than the preset threshold, the pressure sensor 11 quickly transmits the electrical signal to the micro pneumatic cylinder 4, after receiving the signal, the output end of the micro pneumatic cylinder 4 starts to move, by virtue of the inclined structure matched between the driving block 5 and the moving block 7, the driving block 5 extrudes the moving block 7 to slide along the sliding groove 8, in the process, the spring 9 is stretched, the moving block 7 drives the auxiliary clamping block 6 to approach the workpiece from both sides of the bottom of the clamp 2, and the workpiece is clamped, which makes up for the insufficient clamping force caused by wear. During the whole machining process, the elastic protective pad 10 on one side of the clamp 2 and the auxiliary clamping block 6 continuously plays a role, buffers the impact force during clamping, and adapts to the slight vibration of the workpiece during machining, which can stably fix the workpiece in all directions and ensure the accurate and efficient CNC machining.

[0034] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A robust CNC pneumatic tooling fixture comprising a base (1) characterised in that, The top of the base (1) is provided with a plurality of clamps (2), the number of each group of clamps (2) is two, the bottom of each group of clamps (2) is provided with a bottom plate (3), and the inside of each bottom plate (3) is provided with an auxiliary positioning assembly. The auxiliary positioning assembly comprises auxiliary clamping blocks (6), the number of the auxiliary clamping blocks (6) is two, each auxiliary clamping block (6) is located at the bottom of the corresponding clamp (2), and each auxiliary clamping block (6) is used for auxiliary fixing of the workpiece when the clamp (2) is worn.

2. A CNC pneumatic tooling fixture according to claim 1, wherein: The inside of each bottom plate (3) is provided with a cavity, one side of the inside of each bottom plate (3) is fixedly connected with a micro air cylinder (4), the output end of each micro air cylinder (4) is fixedly connected with a driving block (5), and the two sides of each driving block (5) are inclined.

3. A CNC pneumatic tooling fixture according to claim 2, wherein: Every two auxiliary clamping blocks (6) are located at the two sides of the corresponding bottom plate (3), and one side of each auxiliary clamping block (6) is fixedly connected with a moving block (7).

4. The secure CNC powered tooling fixture of claim 3, wherein: Each moving block (7) is inclined on the side close to the corresponding driving block (5), and the structure of each driving block (5) is matched with the structure of the corresponding moving block (7).

5. A CNC pneumatic tooling fixture according to claim 4, wherein: The inner bottom wall of each bottom plate (3) is provided with two sliding grooves (8), the bottom of each moving block (7) is slidably connected with the corresponding sliding groove (8), one side of each sliding groove (8) is fixedly connected with a spring (9), and one end of each spring (9) is fixedly connected with one side of the corresponding moving block (7).

6. The secure CNC powered tooling fixture of claim 1 wherein: One side of each clamp (2) is provided with a pressure sensor (11), and the pressure sensor (11) is electrically connected with the micro air cylinder (4).

7. The secure CNC powered tooling fixture of claim 1 wherein: The top of the base (1) is provided with a plurality of fixed plates (12), one side of each fixed plate (12) is provided with a placing groove (13), and a plurality of placing grooves (13) and a plurality of clamps (2) are one-to-one corresponding.

8. The secure CNC powered tooling fixture of claim 1 wherein: One side of each clamp (2) and auxiliary clamping block (6) is provided with a protective pad (10).

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