Automatic point finding device for CNC machine tools

Abstract

The present invention discloses an automatic point-finding device for a numerically controlled machine tool, comprising: a first linear moving device, a second linear moving device, a vertical plate, a slide, a first distance-finding sensor, and a second distance-finding sensor. The vertical plate is vertically arranged on the horizontally placed first linear moving device, the slide is arranged on one side of the vertical plate, a first cantilever horizontally extending to the upper side of the first linear moving device is arranged on the front of the slide, a ring body is arranged at the end of the first cantilever, the first distance-finding sensor is horizontally arranged on the ring body, a second cantilever extending to the upper side of the ring body is arranged on the front of the slide, and the second distance-finding sensor is vertically arranged on the second cantilever. Through the above manner, the automatic point-finding device for a numerically controlled machine tool described in the present invention uses the first distance-finding sensor to perform multi-point detection of the circumference of the workpiece to find the center line of the workpiece, and at the same time uses the second distance-finding sensor to detect the slope or flatness of the top surface of the workpiece to obtain the coordinates of the processing starting point.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tool processing, in particular to an automatic point-finding device for a numerical control machine tool. Background Art

[0002] Compared with traditional machine tools, CNC machine tools (such as machining centers) have a high degree of automation, strong adaptability to workpiece structures, high production efficiency, improved operational safety, reduced operator labor intensity, and a wide range of applications.

[0003] Before machining with a CNC machine tool, it is necessary to find points on the workpiece for reference positioning. In the prior art, operators usually use hand wheels to manually find points, which is cumbersome and requires repeated operations, has low work efficiency, and requires high personal skill levels of operators, which needs to be improved. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide an automatic point-finding device for a numerically controlled machine tool, which can automatically detect a workpiece and obtain the coordinates of a machining starting point.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an automatic point-finding device for a CNC machine tool, comprising: a first linear motion device, a second linear motion device, a vertical plate, a slide, a first distance-finding sensor and a second distance-finding sensor, wherein the vertical plate is vertically arranged on the horizontally placed first linear motion device, the slide is arranged on one side of the vertical plate, a first cantilever horizontally extending to above one side of the first linear motion device is arranged on the front of the slide, a ring body is arranged at the end of the first cantilever, the first distance-finding sensors are horizontally arranged on the ring body, a second cantilever extending above the ring body is arranged on the front of the slide, the second distance-finding sensor is vertically arranged on the second cantilever and located above the ring body, and the second linear motion device is vertically arranged on the vertical plate and connected to one side of the slide for lifting and lowering drive.

[0006] In a preferred embodiment of the present invention, the first distance measuring sensor and the second distance measuring sensor are laser distance measuring sensors respectively.

[0007] In a preferred embodiment of the present invention, the first linear motion device and the second linear motion device respectively use electric screw slides.

[0008] In a preferred embodiment of the present invention, a guide rail corresponding to the slide seat is vertically arranged on the side surface of the vertical plate.

[0009] In a preferred embodiment of the present invention, the annular array of the first distance measuring sensors is distributed on the outer circle of the ring body and points to the center line of the ring body along the radial direction of the ring body.

[0010] In a preferred embodiment of the present invention, the number of the first distance measuring sensors is at least 3.

[0011] In a preferred embodiment of the present invention, the second distance measuring sensor array is distributed above the center line of the ring body.

[0012] In a preferred embodiment of the present invention, the number of the second distance measuring sensors is at least 2.

[0013] The beneficial effects of the present invention are as follows: the present invention points out an automatic point-finding device for a CNC machine tool. After the workpiece is clamped, the ring body is transferred to the top of the workpiece by a first linear moving device, and then the ring body descends. The first distance measuring sensor is used to perform multi-point detection of the workpiece circumference to find the center line of the workpiece. At the same time, the second distance measuring sensor is used to detect the slope or flatness of the top surface of the workpiece, thereby obtaining the coordinates of the processing starting point on the workpiece, which is convenient for the CNC machine tool to automatically process the cylindrical workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of an automatic point-finding device for a CNC machine tool of the present invention;

[0016] Figure 2 yes Figure 1 Top view of the central ring body. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1~Figure 2 , the embodiment of the present invention includes:

[0019] like Figure 1 The automatic point-finding device for a CNC machine tool shown includes: a first linear moving device 1, a second linear moving device 10, a vertical plate 2, a slide 4, a first distance measuring sensor 9 and a second distance measuring sensor 7. In this embodiment, the first linear moving device 1 is horizontally installed on the machine platform of the CNC machine tool and fixed by screws, and the structure is firm.

[0020] The vertical plate 2 is vertically arranged on the horizontally placed first linear motion device 1. The vertical plate 2 is moved forward and backward by the first linear motion device 1, which is conducive to the detection of the workpiece and the avoidance of the tool during the workpiece processing. The slide 4 is arranged on one side of the vertical plate 2. In this embodiment, a guide rail 3 corresponding to the slide 4 is vertically arranged on the side of the vertical plate 2, which improves the flexibility of the slide 4 to move up and down. The second linear motion device 10 is vertically arranged on the vertical plate 2 and connected to one side of the slide 4 for lifting and lowering drive. In addition, the first linear motion device 1 and the second linear motion device 10 respectively use electric screw slides, which have high movement accuracy and can also be adjusted and controlled by an industrial computer to improve the level of automation.

[0021] A first cantilever 5 extending horizontally to the upper side of the first linear moving device 1 is arranged on the front of the slide 4, a ring body 8 is arranged at the end of the first cantilever 5, and the first ranging sensors 9 are horizontally arranged on the ring body 8. In this embodiment, the first ranging sensor 9 and the second ranging sensor 7 are respectively laser ranging sensors with high ranging accuracy, and are linearly connected to the industrial computer to send measurement signals.

[0022] like Figure 2 As shown, the number of the first distance measuring sensors 9 is at least 3. In this embodiment, 8 first distance measuring sensors 9 are used to improve the measurement accuracy. The 8 first distance measuring sensors 9 are distributed in a ring array on the outer circle of the ring body 8 and radially point to the center line of the ring body 8 along the ring body 8. After the workpiece 11 is clamped, the ring body 8 is transferred to the top of the workpiece 11 according to the set route by the first linear motion device 1, and then the second linear motion device 10 drives the ring body 8 to descend, and the first distance measuring sensors 9 are used to perform multi-point circumferential detection of the workpiece 11 to obtain the coordinates of multiple circumferential points of the workpiece 11, and the coordinates are sent to the industrial computer to find the center line of the workpiece 11.

[0023] After the center line of the workpiece 11 is found, the height coordinate of the starting point needs to be determined. In this embodiment, the front of the slide 4 is provided with a second cantilever 6 extending above the ring body 8, and the second distance measuring sensor 7 is vertically arranged on the second cantilever 6 and located above the ring body 8. The second distance measuring sensor 7 is used to detect the slope or flatness of the top surface of the workpiece 11.

[0024] The second distance measuring sensors 7 are arrayed above the center line of the ring body 8, and the number of the second distance measuring sensors 7 is at least 2. In this embodiment, 4 second distance measuring sensors 7 are used to detect the height of multiple points on the top surface of the workpiece 11, and send the detection signal to the industrial computer to judge the slope or flatness of the top surface of the workpiece 11. If the slope of the top surface of the workpiece 11 is small or the flatness is good, the starting point is located at the intersection of the center line and the top surface of the workpiece 11. If the slope of the top surface of the workpiece 11 is large or the flatness is poor, it is necessary to increase the height coordinate of the starting point and add a milling process. The top surface of the workpiece 11 is milled first, and then substantial processing is performed.

[0025] In summary, the automatic point-finding device for CNC machine tools pointed out in the present invention replaces manual automatic point-finding of workpieces, improves the automation level of CNC machine tools, reduces the skill level requirements for operators, makes operation easier, and is conducive to improving production efficiency.

[0026] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automatic point finding device for a CNC machine tool, characterized in that: include: A first linear motion device, a second linear motion device, a vertical plate, a slide, a first distance measuring sensor and a second distance measuring sensor, wherein the vertical plate is vertically arranged on the horizontally placed first linear motion device, the slide is arranged on one side of the vertical plate, a first cantilever horizontally extending to above one side of the first linear motion device is arranged on the front of the slide, a ring body is arranged at the end of the first cantilever, the first distance measuring sensors are respectively arranged horizontally on the ring body, a second cantilever extending to above the ring body is arranged on the front of the slide, the second distance measuring sensor is vertically arranged on the second cantilever and located above the ring body, the second linear motion device is vertically arranged on the vertical plate and connected to one side of the slide for lifting and lowering drive, the first distance measuring sensor and the second distance measuring sensor are laser distance measuring sensors respectively, and the first distance measuring sensor is distributed in an annular array on the outer circle of the ring body and points to the center line of the ring body radially along the ring body.

2. The automatic point-finding device for CNC machine tools according to claim 1, characterized in that: The first linear motion device and the second linear motion device respectively use electric screw slides.

3. The automatic point-finding device for CNC machine tools according to claim 1, characterized in that: A guide rail corresponding to the slide seat is vertically arranged on the side surface of the vertical plate.

4. The automatic point-finding device for CNC machine tools according to claim 1, characterized in that: The number of the first distance measuring sensors is at least 3.

5. The automatic point-finding device for CNC machine tools according to claim 1, characterized in that: The second distance measuring sensor array is distributed above the center line of the ring body.

6. The automatic point-finding device for CNC machine tools according to claim 1, characterized in that: The number of the second distance measuring sensors is at least 2.

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