Positioning device for numerical control machine tool

Abstract

The utility model relates to numerical control machine tool positioning device technical field, especially in kind of positioning device for numerical control machine tool, including work board, locating plate and positioning mechanism, the locating plate fixed mounting at the top of work board, the locating plate is used for carrying work piece, the positioning mechanism is provided with a plurality of, a plurality of positioning mechanism sets up in the circumference outside of locating plate, the positioning device is used for firm work piece, through adopting above -mentioned technical scheme, can adjust the clamping direction of positioning mechanism according to the different appearance of work piece.

Description

Technical Field

[0001] This utility model relates to the technical field of positioning devices for CNC machine tools, and in particular to a positioning device for CNC machine tools. Background Technology

[0002] The core function of CNC machine tools is to use digital program instructions to precisely, efficiently, and automatically control the movement and processing of machine tools, thereby manufacturing complex and precise mechanical parts.

[0003] Currently, the main function of CNC machine tools is to complete complex geometric shapes that are difficult or impossible to process with traditional machine tools, greatly expanding design possibilities; they have a high degree of automation, can run continuously for a long time, and reduce clamping and adjustment time; through quick program changes, they can flexibly adapt to the processing tasks of different products, shorten the production preparation cycle, and are particularly suitable for multi-variety, small-batch production. Traditional workpiece positioning methods mainly rely on pre-designed and manufactured special fixtures.

[0004] The existing technical solutions have the following drawbacks: when the workpiece is changed to a new workpiece with a large difference in shape, size or contour, the original special fixtures are often unsuitable and new fixtures must be redesigned, manufactured and installed. Utility Model Content

[0005] The purpose of this invention is to provide a positioning device for CNC machine tools to solve the problems existing in the prior art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A positioning device for a CNC machine tool includes a work plate and further includes:

[0008] A positioning plate, which is fixedly installed on the top of the work plate, is used to support the workpiece;

[0009] The positioning device includes multiple positioning mechanisms, which are arranged on the outer periphery of the positioning plate. The positioning device is used to stabilize the workpiece.

[0010] By adopting the above technical solution, the clamping direction of the positioning mechanism can be adjusted according to the different shapes of the workpiece, thereby achieving the goal of quickly and flexibly adapting to changes in the shape and contour of different workpieces.

[0011] In a further embodiment, the positioning mechanism includes a cylinder, a connecting block, a pressure plate, and a locking device. The cylinder includes a fixed part and a movable part. The movable part of the cylinder is located at the top of the cylinder body. The cylinder is fixedly installed on the top of the working plate. The connecting block is fixedly installed at the top of the movable part of the cylinder. A through hole is provided on one side of the bottom of the pressure plate. The pressure plate is rotatably installed on the connecting block. Two locking devices are provided, symmetrically arranged on the top of the pressure plate. The locking devices are used to lock the pressure plate onto the connecting block.

[0012] By adopting the above technical solution, the moving part of the cylinder drives the connecting block at its top to move up and down, and the pressure plate also moves up and down under the drive of the connecting block, so that the pressure plate can move in the up and down direction, and the pressure plate can also rotate freely along the side wall of the connecting block.

[0013] In a further embodiment, the connecting block is a cylinder, and the cylinder is provided with a plurality of transverse through insertion holes.

[0014] By adopting the above technical solution, the axes of multiple insertion holes are located on the same horizontal plane, which facilitates the insertion of the locking device.

[0015] In a further embodiment, the locking device includes a round pin and a spring. The same clearance hole is provided on both sides of the centrifugal end of the pressure plate. The centrifugal end of the round pin passes through the clearance hole and the insertion hole in sequence. The spring is sleeved on the round pin. One end of the spring is fixedly connected to the inlet end of the round pin, and the other end of the spring is fixedly connected to the inner wall of the clearance hole.

[0016] By adopting the above technical solution, in the natural state of the spring, the locking devices located on both sides of the pressure plate can be inserted into the same clearance hole through the insertion hole. When it is necessary to change the rotation direction of the pressure plate on the connecting block, the round pin is pulled out from the clearance hole, the spring is compressed, and the pressure plate is rotated so that the pressure plate is inserted into the insertion hole of another preset position.

[0017] In a further embodiment, the radius of the inner end of the pin gradually decreases.

[0018] By adopting the above technical solution, it is convenient to insert the round pin into the insertion hole.

[0019] In a further embodiment, a handle is fixedly mounted on the centrifugal end of the pin.

[0020] By adopting the above technical solution, it is easier for operators to pull the round pin.

[0021] By adopting the above technical solution, before CNC machine tool processing, the positioning plate is first securely installed on the top of the work plate, and the workpiece to be processed is placed on the positioning plate. At this time, according to the different shapes of the workpiece, the positioning mechanism is adjusted. The operator holds the handle at the centrifugal end of the pin, overcomes the spring force to pull the pin out of the insertion hole, and compresses the spring. Since the connecting block is cylindrical and has multiple transverse through insertion holes with the axis on the same horizontal plane, the pressure plate is rotated to a suitable angle, and then the pin is aligned with another preset insertion hole and inserted. Under the action of the spring force, the pin passes through the insertion hole and is inserted back into the connecting block. The pressure plate is locked onto the connecting block by two symmetrical locking devices. Then, the cylinder is activated, and the moving part of the cylinder moves downward, thereby driving the connecting block fixed at its top to move downward. The pressure plate, which is rotatably connected to the connecting block, also moves downward. After the pressure plate is adjusted to the appropriate height, the angle of the pressure plate is finely adjusted again so that it can accurately press on the workpiece, stably positioning the workpiece and maintaining the pressure of the pressure plate on the workpiece. This ensures that the workpiece is stable in position during processing and will not be displaced due to machine tool vibration or cutting force, thus providing stable processing conditions for the CNC machine tool and ensuring that the processed workpiece meets the design requirements.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. By using the spring and the round pin in combination, the locking devices on both sides of the pressure plate can pass through the insertion hole and be inserted into the same clearance hole in the spring in its natural state. When it is necessary to change the rotation direction of the pressure plate on the connecting block, the round pin is pulled out from the clearance hole, the spring is compressed, and the pressure plate is rotated so that the pressure plate is inserted into the insertion hole of another preset position.

[0024] 2. Before machining on a CNC machine tool, the positioning plate is securely installed on top of the worktable. The workpiece to be machined is placed on the positioning plate. At this time, according to the different shapes of the workpiece, the positioning mechanism is adjusted. The operator holds the handle at the centrifugal end of the pin, overcoming the spring force to pull the pin out of the insertion hole, compressing the spring. Since the connecting block is cylindrical and has multiple transverse through-holes with the axis on the same horizontal plane, the pressure plate is rotated to a suitable angle. Then, the pin is aligned with another preset insertion hole and inserted. Under the action of the spring force, the pin passes through the insertion hole and is inserted back into the connecting block, thus connecting the two... The symmetrical locking devices lock the pressure plate onto the connecting block. Then, the cylinder is activated, and the moving part of the cylinder moves downward, thereby driving the connecting block fixed at its top to move downward. The pressure plate, which is rotatably connected to the connecting block, also moves downward. After the pressure plate is adjusted to the appropriate height, the angle of the pressure plate is finely adjusted again so that it can accurately press on the workpiece, stably positioning the workpiece and maintaining the pressure of the pressure plate on the workpiece. This ensures that the workpiece is stable in position during processing and will not be displaced due to machine tool vibration or cutting force. It can provide stable processing conditions for CNC machine tools and ensure that the processed workpiece meets the design requirements. Attached Figure Description

[0025] Figure 1 This is an overall schematic diagram of the present invention, used to illustrate the connection relationship of the clamping device for casting processing;

[0026] Figure 2 This is a structural schematic diagram illustrating the positioning mechanism of this utility model;

[0027] Figure 3 This is a structural schematic diagram illustrating the locking device of this utility model.

[0028] In the diagram, 1 is the positioning plate; 2 is the worktable; 3 is the positioning mechanism; 31 is the cylinder; 32 is the connecting block; 33 is the pressure plate; 34 is the locking device; 341 is the pin; and 342 is the spring. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0031] Example 1:

[0032] like Figures 1-3 As shown, a positioning device for a CNC machine tool includes a work plate 2, a positioning plate 1, and a positioning mechanism 3. The positioning plate 1 is fixedly installed on the top of the work plate 2 and is used to support the workpiece. Multiple positioning mechanisms 3 are provided and are arranged on the outer periphery of the positioning plate 1. The positioning device is used to stabilize the workpiece.

[0033] The positioning mechanism 3 includes a cylinder 31, a connecting block 32, a pressure plate 33, and a locking device 34. The cylinder 31 includes a fixed part and a movable part. The movable part of the cylinder 31 is located at the top of the cylinder body. The cylinder 31 is fixedly mounted on the top of the working plate 2. The connecting block 32 is fixedly mounted on the top of the movable part of the cylinder 31. A through hole is provided on one side of the bottom of the pressure plate 33. The pressure plate 33 is rotatably mounted on the connecting block 32. Two locking devices 34 are provided, symmetrically arranged on the top of the pressure plate 33. The locking devices 34 are used to lock the pressure plate 33 in place. On the connecting block 32, the connecting block 32 is a cylinder with multiple transverse through insertion holes. The locking device 34 includes a round pin 341 and a spring 342. The centrifugal end of the pressure plate 33 has the same clearance hole on both sides. The centrifugal end of the round pin 341 passes through the clearance hole and the insertion hole in sequence. The spring 342 is sleeved on the round pin 341. One end of the spring 342 is fixedly connected to the inlet end of the round pin 341, and the other end of the spring 342 is fixedly connected to the inner wall of the clearance hole. The radius of the inlet end of the round pin 341 gradually decreases. A handle is fixedly installed on the centrifugal end of the round pin 341.

[0034] Specific implementation process: Before CNC machine tool processing, the positioning plate 1 is first securely installed on the top of the work plate 2. The workpiece to be processed is placed on the positioning plate 1. At this time, according to the different shapes of the workpiece, the positioning mechanism 3 is adjusted. The operator holds the handle of the centrifugal end of the pin 341 and pulls the pin 341 out of the insertion hole against the elastic force of the spring 342, so that the spring 342 is compressed. Since the connecting block 32 is cylindrical and has multiple transverse through insertion holes with the axis on the same horizontal plane, the pressure plate 33 is rotated to a suitable angle. Then, the pin 341 is aligned with another preset insertion hole and inserted. Under the action of the elastic force of the spring 342, the pin 341 passes through the insertion hole and is inserted back into the connecting block 32. Inside, the pressure plate 33 is locked onto the connecting block 32 by two symmetrical locking devices 34. Then, the cylinder 31 is activated, and the movable part of the cylinder 31 moves downward, thereby driving the connecting block 32 fixed at its top to move downward. The pressure plate 33, which is rotatably connected to the connecting block 32, also moves downward. After the pressure plate 33 is adjusted to a suitable height, the angle of the pressure plate 33 is finely adjusted again so that it can accurately press on the workpiece, stably positioning the workpiece and maintaining the pressure of the pressure plate 33 on the workpiece. This ensures that the workpiece is stable in position during processing and will not be displaced due to machine tool vibration or cutting force, thus providing stable processing conditions for the CNC machine tool and ensuring that the processed workpiece meets the design requirements.

[0035] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A positioning device for a CNC machine tool, comprising a work plate (2), characterized in that, Also includes: Positioning plate (1), which is fixedly installed on the top of the working plate (2), is used to support the workpiece; And positioning mechanism (3), wherein multiple positioning mechanisms (3) are provided, and multiple positioning mechanisms (3) are arranged on the outer periphery of the positioning plate (1). The positioning device is used to stabilize the workpiece. The positioning mechanism (3) includes a cylinder (31), a connecting block (32), a pressure plate (33), and a locking device (34). The cylinder (31) includes a fixed part and a movable part. The movable part of the cylinder (31) is located at the top of the cylinder (31) body. The cylinder (31) is fixedly installed on the top of the working plate (2). The connecting block (32) is fixedly installed at the top of the movable part of the cylinder (31). A through hole is provided on one side of the bottom of the pressure plate (33). The pressure plate (33) is rotatably installed on the connecting block (32). There are two locking devices (34). The two locking devices (34) are symmetrically arranged on the top of the pressure plate (33). The locking devices (34) are used to lock the pressure plate (33) on the connecting block (32).

2. The positioning device for a CNC machine tool according to claim 1, characterized in that: The connecting block (32) is a cylinder, and the cylinder is provided with multiple transverse through insertion holes.

3. A positioning device for a CNC machine tool according to claim 2, characterized in that: The locking device (34) includes a round pin (341) and a spring (342). The centrifugal end of the pressure plate (33) is provided with the same clearance hole on both sides. The centrifugal end of the round pin (341) passes through the clearance hole and the insertion hole in sequence. The spring (342) is sleeved on the round pin (341). One end of the spring (342) is fixedly connected to the inlet end of the round pin (341), and the other end of the spring (342) is fixedly connected to the inner wall of the clearance hole.

4. A positioning device for a CNC machine tool according to claim 3, characterized in that: The radius of the inlet end of the circular pin (341) gradually decreases.

5. A positioning device for a CNC machine tool according to claim 3, characterized in that: A handle is fixedly installed on the centrifugal end of the circular pin (341).

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