Pneumatic clamp of numerical control milling machine

Abstract

The utility model relates to the technical field of milling machine fixtures, and discloses a numerical control milling machine pneumatic fixture which comprises a shell, the shell comprises an upper shell used for supporting a workpiece, a plurality of guide grooves are formed in the upper side of the upper shell along the center in a surrounding mode, and a pneumatic assembly is installed on the inner side of the upper shell; the pneumatic assembly comprises an air cylinder installed on the upper shell, a connecting sleeve is installed at the movable end of the air cylinder, an elastic telescopic unit is installed on the connecting sleeve, a clamping assembly is installed on the connecting sleeve, the clamping assembly comprises a guide column installed in a guide groove in a sliding mode, and a clamping plate is installed on the guide column. Through cooperative use of the pneumatic assembly, the clamping assembly, the auxiliary fixing assembly, the negative pressure hole and the guide groove, clamping is conducted through synchronous movement of the clamping plates, negative pressure is formed in the negative pressure hole in a matched mode to adsorb and fix a workpiece, the clamping device can be suitable for workpieces of different shapes, and the clamping device has the effects of being stable in clamping and good in applicability.

Description

Technical Field

[0001] The present application relates to the technical field of milling machine fixtures, and in particular to a pneumatic fixture for a CNC milling machine. Background Art

[0002] Milling machine fixtures are mainly used to process planes, grooves, splines and various molding surfaces on parts, and are one of the most commonly used fixtures. At present, when clamping objects of different shapes on CNC milling machines or machining centers, the clamping block of the fixture is generally replaced or the fixture is replaced. It is difficult to use the same fixture to clamp the object, which makes the application range of the fixture small and leads to low production efficiency.

[0003] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In order to solve the problem of low efficiency of a CNC milling machine clamp when clamping objects of different shapes, the present application provides a pneumatic clamp for a CNC milling machine.

[0005] The present application provides a pneumatic fixture for a CNC milling machine using the following technical solution:

[0006] A pneumatic clamp for a numerically controlled milling machine, comprising a housing, a pneumatic component, a clamping component and an auxiliary fixing component;

[0007] Wherein, the housing comprises an upper shell with a plurality of negative pressure holes and guide grooves, and a workpiece support;

[0008] The clamping assembly includes a plurality of clamping plates that move in the radial direction and are used to clamp the workpiece;

[0009] The auxiliary fixing assembly includes a plurality of pistons moving along the Z axis, which are used for the pistons to move in the negative pressure hole to form negative pressure and adsorb the firmware on the surface of the upper shell;

[0010] The pneumatic assembly includes a cylinder and an elastic telescopic unit located at the movable end of the cylinder. The cylinder and the multiple clamps are connected via a transmission component 1, which is used to convert the radial telescopic movement of the cylinder into synchronous radial movement of the multiple clamps. The elastic telescopic unit and the piston are connected via a transmission component 2, which is used to convert the radial movement of the elastic telescopic unit into movement of the piston along the Z axis.

[0011] Preferably, a plurality of the guide grooves are distributed around the upper shell, and a mounting plate is provided at the lower end of the upper shell for fixing the device on a workbench.

[0012] Preferably, the transmission component includes a rotating disk with a plurality of arc grooves and a plurality of connecting parts, the rotating disk is rotatably set on the mounting plate, the upper end of the connecting part slides through the corresponding guide groove and is connected to the clamping plate, the lower end of the connecting part is slidably set in the corresponding arc groove, and the cylinder is connected to one of the cylinders.

[0013] Preferably, the second transmission component includes a pull rope and two guide wheels, the guide wheels are arranged on both sides of the upper cylinder of the upper shell, both ends of the pull rope are wrapped around and passed through the corresponding guide wheels and are connected to a connecting plate, and the elastic telescopic unit connects the pull rope and the cylinder.

[0014] Preferably, a telescopic member is provided at the lower end of the piston, and the telescopic member passes through the upper shell and is connected to the connecting plate.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] Through the coordinated use of pneumatic components, clamping components, auxiliary fixing components, negative pressure holes, and guide grooves, the cylinder is extended to drive the connecting sleeve and the elastic telescopic unit to move, and the clamping plate is driven to move synchronously in the radial direction to achieve clamping. At the same time, the elastic telescopic unit drives the pull rope to pull the connecting plate and the piston to move, forming negative pressure in the negative pressure hole in contact with the lower surface of the workpiece, further fixing the workpiece on the workbench, and improving the stability of clamping; compared with the existing technology, it has the effects of stable clamping and good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a three-dimensional structure from a first-view perspective of an embodiment of the application;

[0018] Figure 2 is a schematic diagram of a second perspective stereoscopic structure of an embodiment of the application;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure from a third perspective of an embodiment of the application.

[0020] Explanation of the reference numerals: 1. Shell; 101. Upper shell; 102. Mounting plate; 2. Pneumatic assembly; 201. Cylinder; 202. Connecting sleeve; 203. Elastic telescopic unit; 2031. Telescopic sleeve; 2032. Spring one; 3. Clamping assembly; 301. Rotating disk; 302. Sliding block; 303. Guide column; 304. Clamping plate; 4. Auxiliary fixing assembly; 401. Pull rope; 402. Guide wheel; 403. Pumping unit; 4031. Connecting plate; 4032. Column; 4033. Piston; 4034. Spring two; 5. Negative pressure hole; 6. Guide groove. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-3 This application is described in further detail.

[0022] The present application embodiment discloses a pneumatic clamp for a CNC milling machine. Figure 1-3 A pneumatic fixture for a numerically controlled milling machine includes a shell 1, the shell 1 includes an upper shell 101 for supporting a workpiece, a plurality of guide grooves 6 are provided around the center of the upper side of the upper shell 101, a pneumatic assembly 2 is installed on the inner side of the upper shell 101, the pneumatic assembly 2 includes a cylinder 201 installed on the upper shell 101, a connecting sleeve 202 is installed on the movable end of the cylinder 201, an elastic telescopic unit 203 is installed on the connecting sleeve 202, a clamping assembly 3 is installed on the connecting sleeve 202, the clamping assembly 3 includes a guide column 303 slidably installed in the guide groove 6, a clamping plate 304 is installed on the guide column 303, and a clamping assembly 3 is installed on the connecting sleeve 202. The cylinder 201 drives the synchronously moving clamp 304 to clamp the workpiece, which can be suitable for workpieces of different shapes. A number of negative pressure holes 5 are opened on the outer side of the upper shell 101, and an auxiliary fixing component 4 is installed on the elastic telescopic unit 203. The negative pressure hole 5 includes a suction and pressure unit 403 installed in the upper shell 101. The suction and pressure unit 403 includes a piston 4033 slidably installed in the negative pressure hole 5. The negative pressure hole 5 in complete contact is blocked through the lower surface of the workpiece, and the piston 4033 moves downward to form a negative pressure in the negative pressure hole 5, so that the workpiece is sucked onto the upper shell 101, thereby further improving the stability of clamping.

[0023] Reference Figure 1 The lower end of the upper shell 101 is fixedly connected with a mounting plate 102, and a plurality of threaded mounting holes are opened on the mounting plate 102. The mounting plate 102 is mounted on the workbench of the CNC milling machine by passing bolts through the threaded mounting holes.

[0024] Reference Figure 3 A rotating disk 301 is rotatably installed on the upper surface of the mounting plate 102, and a plurality of arc grooves are opened on the rotating disk 301, in which a slider 302 is slidably installed, and the upper end of the slider 302 rotates through the connecting sleeve 202 and is rotatably connected with the guide column 303. The connecting sleeve 202 is driven by the cylinder 201 to push the slider 302 and the guide column 303 to move along the guide groove 6, so that the slider 302 drives the rotating disk 301 to rotate, and then drives the remaining sliders 302 and the guide column 303 to move synchronously along the guide groove 6, so that the clamping plate 304 clamps or releases the workpiece, and an anti-slip pad is added to the surface of the clamping plate 304 to improve the stability of clamping.

[0025] Reference Figure 2The elastic telescopic unit 203 includes a telescopic sleeve 2031 installed on the connecting sleeve 202, a spring 2032 is installed inside the telescopic sleeve 2031, and the movable end of the telescopic sleeve 2031 is connected to the pull rope 401. Guide wheels 402 are installed on both sides of the cylinder 201 on the upper shell 101. The pulling direction of the pull rope 401 is changed by the guide wheels 402. Both ends of the pull rope 401 are wrapped around and passed through the guide wheels 402, and are connected to the pumping and pressing unit 403. The elastic telescopic unit 203 is pushed to move through the connecting sleeve 202, thereby driving the pull rope 401 to pull the pumping and pressing unit 403 to move.

[0026] Reference Figure 2 , the lower ends of several springs 4034 are all installed with columns 4032, the lower ends of several columns 4032 slide through the upper shell 101 and are connected to the same connecting plate 4031, the end of the pull rope 401 is connected to the lower end of the connecting plate 4031, and the outer sliding sleeve of the column 4032 in the negative pressure hole 5 is provided with a spring 4034, and the elastic force of the spring 4034 drives the piston 4033 to reset, thereby driving the connecting plate 4031 and the pull rope 401 to reset, and the resistance of the connecting plate 4031 to move downward The force is smaller than the force required for the spring 1 2032 to deform. The cylinder 201 pushes the telescopic sleeve 2031 to drive the pull rope 401 to pull the connecting plate 4031 downward. As the elastic force of the spring 2 4034 and the negative pressure on the piston 4033 gradually increase, the downward resistance of the connecting plate 4031 is greater than the force required for the spring 1 2032 to deform. At this time, the spring 1 2032 is compressed, so that the cylinder 201 can continue to push the connecting sleeve 202 to move, thereby allowing the clamping plate 304 to clamp the workpiece.

[0027] The implementation principle of the pneumatic clamp for a CNC milling machine in the embodiment of the present application is as follows: the workpiece is placed at the center of the upper shell 101 so that the lower surface of the workpiece fits with the upper surface of the upper shell 101, the cylinder 201 is controlled to extend, the connecting sleeve 202 and the elastic telescopic unit 203 are driven to move, and the sliding block 302 and the guide column 303 are driven to move along the guide groove 6 through the connecting sleeve 202, thereby driving the rotating disk 301 to rotate, so that all the clamps 304 move synchronously, and the workpiece is directly contacted and clamped, and the telescopic sleeve 2031 drives the pull rope 4 01 pulls the connecting plate 4031 downward, so that the column 4032 and the piston 4033 move downward. Since part of the negative pressure hole 5 is completely in contact with the lower surface of the workpiece to form a blockage, negative pressure is formed in the blocked negative pressure hole 5, and the workpiece is sucked onto the upper shell 101, further improving the clamping stability. After the processing is completed, the cylinder 201 contracts, the clamping plate 304 and the pull rope 401 are reset, and the elastic force of the spring 1 2032 and the spring 2 4034 drives the connecting plate 4031 and the piston 4033 to reset, thereby releasing the lock on the workpiece.

[0028] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0029] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0031] 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 pneumatic fixture for a CNC milling machine, characterized in that: It comprises a housing (1), a pneumatic assembly (2), a clamping assembly (3) and an auxiliary fixing assembly (4); Wherein, the housing (1) comprises an upper shell (101) with a plurality of negative pressure holes (5) and guide grooves (6) for supporting a workpiece; The clamping assembly (3) comprises a plurality of clamping plates (304) movable in a radial direction and used for clamping the workpiece; The auxiliary fixing assembly (4) comprises a plurality of pistons (4033) that move along the Z axis, and is used for the pistons (4033) to move in the negative pressure hole (5) to form negative pressure, thereby adsorbing the firmware onto the surface of the upper shell (101); The pneumatic assembly (2) comprises a cylinder (201) and an elastic telescopic unit (203) located at the movable end of the cylinder (201); the cylinder (201) and the plurality of clamps (304) are connected to each other via a transmission component 1 for converting the radial telescopic movement of the cylinder (201) into synchronous radial movement of the plurality of clamps (304); the elastic telescopic unit (203) and the piston (4033) are connected to each other via a transmission component 2 for converting the radial movement of the elastic telescopic unit (203) into movement of the piston (4033) along the Z axis.

2. The pneumatic clamp for a CNC milling machine according to claim 1, characterized in that: A plurality of guide grooves (6) are distributed around the upper shell (101), and a mounting plate (102) is provided at the lower end of the upper shell (101) for fixing the device on a workbench.

3. The pneumatic clamp for a CNC milling machine according to claim 1, characterized in that: The transmission component 1 comprises a rotating disk (301) with a plurality of arc grooves and a plurality of connecting members. The rotating disk (301) is rotatably arranged on the mounting plate (102). The upper end of the connecting member slides through the corresponding guide groove (6) and is connected to the clamping plate (304). The lower end of the connecting member slides in the corresponding arc groove. The cylinder (201) is connected to one of the cylinders (201).

4. The pneumatic clamp for a CNC milling machine according to claim 3, characterized in that: The second transmission component comprises a pull rope (401) and two guide wheels (402), wherein the guide wheels (402) are arranged on both sides of the cylinder (201) on the upper shell (101), and both ends of the pull rope (401) are wound around and pass through the corresponding guide wheels (402) and are connected to a connecting plate (4031), and the elastic telescopic unit (203) connects the pull rope (401) and the cylinder (201).

5. The pneumatic clamp for a CNC milling machine according to claim 4, characterized in that: A telescopic member is provided at the lower end of the piston (4033), and the telescopic member passes through the upper shell (101) and is connected to the connecting plate (4031).

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