Precision detection device for numerical control machine tool

Abstract

The invention discloses a numerical control machine tool precision detection device, which comprises a miniature centering chuck, a coaxiality measuring instrument and a verticality measuring instrument which are all mounted on a bottom plate, and is characterized in that the miniature centering chuck is rotatably mounted on a chuck seat through a bearing and is used for clamping a reference piece or an adaptive workpiece; an adjustable tip cone is arranged on the opposite side of the micro centering chuck in an axially and longitudinally adjustable manner and is used for jacking a reference piece or a workpiece; a coaxiality measuring instrument is adjustably arranged on one side of the micro centering chuck, and a perpendicularity measuring instrument is adjustably arranged on the other side of the micro centering chuck and is used for measuring at least one of the coaxiality and the perpendicularity of a reference piece or an adaptive workpiece; and the micro centering chuck and the adjustable tip cone are coaxially arranged. According to the invention, the coaxiality and perpendicularity of the clamping reference part are reversely detected through the reference part, the detection cost is low, the adaptability is high, the coaxiality and perpendicularity of a transverse machine tool, a longitudinal machine tool and a common workpiece can be detected, the application range is wide, and the flexibility is high.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tool detection, and in particular to a precision detection device for a numerically controlled machine tool. Background Art

[0002] CNC machine tools have become indispensable equipment in the manufacturing industry due to their high precision, high efficiency, and high degree of automation. The performance of CNC machine tools directly affects the quality of machined parts and production efficiency, and coaxiality and perpendicularity are important indicators of CNC machine tool accuracy.

[0003] Accurately measuring coaxiality and perpendicularity is crucial in the production and use of CNC machine tools. Coaxiality refers to the alignment of the machine tool spindle's axes with mating components (such as bearings and tools), while perpendicularity refers to the perpendicular intersection accuracy between the machine tool's axes. These two indicators directly impact the dimensional accuracy, form and position accuracy, and surface quality of machined parts.

[0004] At present, the commonly used coaxiality and verticality detection tools on the market mainly include three-coordinate measuring machines, laser interferometers, dial indicators, micrometers, etc., but the application scope of such tools is limited due to their high equipment cost, high price and strict environmental requirements. Summary of the Invention

[0005] The main purpose of the present invention is to provide a precision detection device for CNC machine tools, aiming to solve the technical problems of high cost and narrow application range of existing detection tools.

[0006] To achieve the above-mentioned object, the present invention provides a CNC machine tool precision detection device, comprising a micro-centering chuck, a coaxiality measuring instrument, and a perpendicularity measuring instrument, wherein the micro-centering chuck, the coaxiality measuring instrument, and the perpendicularity measuring instrument are all mounted on a base plate, and the micro-centering chuck is rotatably mounted on a chuck seat via a bearing, and is used to clamp a reference part or an adapted workpiece; The micro centering chuck is provided with an adjustable top cone on the opposite side which can be adjusted axially and longitudinally for supporting the reference part or workpiece; The micro centering chuck is adjustable on one side with a coaxiality measuring instrument, and on the other side with a perpendicularity measuring instrument, for measuring at least one of the coaxiality and perpendicularity of the reference part or the adapted workpiece; The micro centering chuck is coaxially arranged with the adjustable top cone.

[0007] Furthermore, the base plate is also provided with a fixed top cone adapted to at least one of the verticality measuring instrument and the coaxiality measuring instrument. The fixed top cone is mounted on the base plate by screws and is used to support the reference part or workpiece during longitudinal measurement.

[0008] Furthermore, a top cone seat adjustment block is provided at the bottom of the top cone seat; The bottom plate is provided with a top cone seat mounting hole adapted to the top cone seat adjustment block, the top cone seat adjustment block is movably embedded in the top cone seat mounting hole, an adjusting bolt is provided on one side of the bottom plate, and the top cone seat is locked by the adjusting bolt after being adjusted to the required position.

[0009] A screw nut is installed on the top cone seat through a screw, and the adjustable top cone is adjustably installed in the screw nut through a thread, which is used to adjust the height of the top cone seat, so that the adjustable top cone can adapt to the horizontal machine tool chuck, and then at least one of the coaxiality and verticality of the machine tool is measured through the reference part.

[0010] Furthermore, the coaxiality measuring instrument is detachably mounted on the coaxiality transverse bracket by adjusting bolts, the coaxiality transverse bracket is height-adjustably mounted on the coaxiality longitudinal bracket by adjusting bolts, and the coaxiality longitudinal bracket is mounted on the base plate by bolts; The coaxiality transverse bracket is provided with an adaptive coaxiality balancing block.

[0011] Furthermore, the verticality measuring instrument is detachably mounted on the verticality transverse bracket by adjusting bolts, the verticality transverse bracket is height-adjustably mounted on the verticality longitudinal bracket by adjusting bolts, and the verticality longitudinal bracket is mounted on the base plate by bolts; The verticality transverse bracket is provided with an adaptive verticality balancing block.

[0012] Furthermore, the micro centering chuck is coaxially mounted on a chuck shaft by means of a screw, and a chuck handle is provided on the chuck shaft; The chuck shaft is hollow inside and provided with a shaft shoulder; The shaft shoulder is rotatably mounted in the chuck seat via a bearing.

[0013] Furthermore, the coaxiality longitudinal bracket is provided with scales from bottom to top; The top cone seat adjusting block is provided with scales from top to bottom.

[0014] Furthermore, the adjustable top cone is provided with a conical head at the head portion and a top cone handle at the tail portion.

[0015] Furthermore, a conical head is provided on the fixed top cone, and an annular oil collecting groove is provided on the periphery of the conical head. The conical head is adapted to fit the longitudinal machine tool chuck during longitudinal measurement.

[0016] The beneficial effects of the present invention are embodied in: In the present invention, the coaxiality and verticality of the clamped reference part are detected by reverse detection of the reference part, the detection cost is low, the adaptability is strong, the horizontal machine tools can be detected, the vertical machine tools can be detected, and the coaxiality and verticality of ordinary workpieces can be detected, the application range is wide, and the flexibility is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention during longitudinal detection; Figure 3 It is a structural schematic diagram of the clamping and verticality detection assembly of the present invention; Figure 4 It is a structural schematic diagram of the top cone and coaxiality detection assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the clamping assembly of the present invention; Figure 6 It is a structural schematic diagram of the present invention during horizontal detection.

[0018] Description of reference numerals: 1. Base plate, 1a. Mounting hole of top cone seat, 2. Chuck seat, 3. Micro centering chuck, 4. Top cone seat, 5. Adjustable top cone, 6. Coaxiality longitudinal bracket, 7. Coaxiality transverse bracket, 8. Coaxiality measuring instrument, 9. Coaxiality balancing block, 10. Verticality longitudinal bracket, 11. Verticality transverse bracket, 12. Verticality measuring instrument, 13. Fixed top cone, 13a. Oil collecting tank, 14. Verticality balancing block, 15. Reference part, 16. Top cone handle, 17. Top cone seat adjustment block, 18. Chuck shaft, 19. Chuck handle, 20. Bearing, 21. Transverse machine tool chuck, 22. Longitudinal machine tool chuck. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0022] See also Figures 1 to 6 As shown, the present invention provides a CNC machine tool precision detection device, comprising a micro-centering chuck 3, a coaxiality measuring instrument 8, and a perpendicularity measuring instrument 12. The micro-centering chuck 3, the coaxiality measuring instrument 8, and the perpendicularity measuring instrument 12 are all mounted on a base plate 1. The micro-centering chuck 3 is rotatably mounted on a chuck seat 2 via a bearing 20, and is used to clamp a reference member 15 or an adapted workpiece. The micro centering chuck 3 is provided with an adjustable top cone 5 on the opposite side which can be adjusted axially and longitudinally, and is used to support the reference piece 15 or the workpiece; The micro centering chuck 3 is adjustable on one side with a coaxiality measuring instrument 8 and on the other side with a perpendicularity measuring instrument 12 for measuring at least one of the coaxiality and perpendicularity of the reference part 15 or the adapted workpiece; The micro centering chuck 3 and the adjustable top cone 5 are coaxially arranged.

[0023] How it works Horizontal machine tool accuracy detection: see Figure 6 As shown, when using, first fix the base plate through the machine tool operating table, then clamp one end of the reference piece on the chuck of the horizontal machine tool, and adjust the height of the top cone seat adjustment block on the other end to make it fit the machine tool chuck, and rotate the adjustable top cone to support the reference piece, and then adjust the coaxiality measuring instrument and the verticality measuring instrument to the appropriate position. If the deviation is large, it means that there is an error in the chuck system, so perform reverse error measurement; If there is a problem with the machine tool chuck, the adjustable ejector cone can be replaced with the machine tool's built-in ejector cone, and measurement can be performed to determine whether there is a problem with the machine tool's built-in ejector cone.

[0024] Longitudinal machine tool accuracy detection: see Figure 2As shown, when in use, first fix the base plate through the machine tool operating table, then clamp one end of the reference part on the longitudinal machine tool chuck, and press the other end on the fixed top cone, then adjust the coaxiality measuring instrument and the verticality measuring instrument to the appropriate position. If the deviation is large, it means that there is a systematic error in the machine tool chuck, so perform reverse error measurement.

[0025] Workpiece precision detection: Clamp one end of the workpiece on the micro centering chuck, adjust the adjustable top cone on the other end, hold the workpiece, and rotate the micro centering chuck to detect the coaxiality and verticality of the workpiece.

[0026] In some embodiments, see Figure 4 As shown, the base plate 1 is also equipped with a fixed top cone 13 adapted to at least one of the verticality measuring instrument 12 and the coaxiality measuring instrument 8. The fixed top cone 13 is installed on the base plate 1 by screws and is used to support the reference part 15 or the workpiece during longitudinal measurement.

[0027] In some embodiments, see Figure 1 and 3 As shown, a top cone seat adjustment block 17 is provided at the bottom of the top cone seat 4; The base plate 1 is provided with a top cone seat mounting hole 1a adapted to the top cone seat adjustment block 17. The top cone seat adjustment block 17 is movably embedded in the top cone seat mounting hole 1a. An adjusting bolt is provided on one side of the base plate 1. The top cone seat 4 is adjusted to the required position and then locked by the adjusting bolt.

[0028] A screw nut is installed on the top cone seat 4 through a screw, and the adjustable top cone 5 is adjustably installed in the screw nut through a thread, which is used to adjust the height of the top cone seat 4, so that the adjustable top cone 5 is adapted to the horizontal machine tool chuck 21, and then at least one of the coaxiality and verticality of the machine tool is measured through the reference part 15.

[0029] In some embodiments, see Figure 1 and 3 As shown, the coaxiality measuring instrument 8 is detachably mounted on the coaxiality transverse bracket 7 by adjusting bolts, the coaxiality transverse bracket 7 is height-adjustably mounted on the coaxiality longitudinal bracket 6 by adjusting bolts, and the coaxiality longitudinal bracket 6 is mounted on the base plate 1 by bolts; The coaxiality transverse bracket 7 is provided with an adaptive coaxiality balancing block 9 .

[0030] In some embodiments, see Figure 1 and 4 As shown, the verticality measuring instrument 12 is detachably mounted on the verticality horizontal bracket 11 by adjusting bolts, the verticality horizontal bracket 11 is height-adjustable by adjusting bolts and is mounted on the verticality longitudinal bracket 10, and the verticality longitudinal bracket 10 is mounted on the base plate 1 by bolts; The verticality transverse bracket 11 is provided with an adaptive verticality balancing block 14 .

[0031] In some embodiments, see Figure 6 As shown, the micro centering chuck 3 is coaxially mounted on a chuck shaft 18 by screws, and a chuck handle 19 is provided on the chuck shaft 18; The chuck shaft 18 is hollow inside and has a shoulder; The shaft shoulder is rotatably mounted in the chuck seat 2 via a bearing 20 .

[0032] In some embodiments, see Figure 1 As shown, the coaxiality longitudinal bracket 6 is provided with scales from bottom to top; The top cone seat adjusting block 17 is provided with scales from top to bottom.

[0033] In some embodiments, see Figure 1 As shown, the adjustable top cone 5 is provided with a conical head at the head and a top cone handle 16 at the tail.

[0034] In some embodiments, see Figure 4 As shown, the fixed top cone 13 is provided with a conical head, and an annular oil collecting groove 13a is provided on the periphery of the conical head. The conical head is used to adapt to the longitudinal machine tool chuck 22 during longitudinal measurement.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precision detection device for a numerically controlled machine tool, comprising a micro-centering chuck (3), a coaxiality measuring instrument (8), and a verticality measuring instrument (12), wherein the micro-centering chuck (3), the coaxiality measuring instrument (8), and the verticality measuring instrument (12) are all mounted on a base plate (1), and characterized in that The micro centering chuck (3) is rotatably mounted on the chuck seat (2) via a bearing (20) and is used to clamp a reference piece (15) or a matching workpiece; The micro centering chuck (3) is provided with an adjustable top cone (5) on the opposite side which can be adjusted axially and longitudinally and is used to support a reference piece (15) or a workpiece; The micro centering chuck (3) is adjustable on one side with a coaxiality measuring instrument (8) and on the other side with a verticality measuring instrument (12) for measuring at least one of the coaxiality and verticality of the reference part (15) or the matching workpiece; The micro centering chuck (3) is coaxially arranged with the adjustable top cone (5).

2. A CNC machine tool precision detection device as claimed in claim 1, characterized in that: The base plate (1) is also provided with a fixed top cone (13) adapted to at least one of the verticality measuring instrument (12) and the coaxiality measuring instrument (8); the fixed top cone (13) is mounted on the base plate (1) by means of screws and is used to support a reference piece (15) or a workpiece during longitudinal measurement.

3. A CNC machine tool precision detection device as claimed in claim 2, characterized in that: A top cone seat adjustment block (17) is provided at the bottom of the top cone seat (4); The bottom plate (1) is provided with a top cone seat mounting hole (1a) adapted to the top cone seat adjusting block (17); the top cone seat adjusting block (17) is movably embedded in the top cone seat mounting hole (1a); an adjusting bolt is provided on one side of the bottom plate (1); and the top cone seat (4) is locked by the adjusting bolt after being adjusted to a desired position; A screw nut is mounted on the top cone seat (4) via a screw, and the adjustable top cone (5) is adjustably mounted in the screw nut via a thread, and is used to adjust the height of the top cone seat (4), so that the adjustable top cone (5) is adapted to fit the transverse machine tool chuck (21), and at least one of the coaxiality and verticality of the machine tool is measured via a reference piece (15).

4. A CNC machine tool precision detection device as claimed in claim 2, characterized in that: The coaxiality measuring instrument (8) is detachably mounted on the coaxiality transverse bracket (7) by means of an adjusting bolt, the coaxiality transverse bracket (7) is height-adjustably mounted on the coaxiality longitudinal bracket (6) by means of an adjusting bolt, and the coaxiality longitudinal bracket (6) is mounted on the base plate (1) by means of bolts; The coaxiality transverse bracket (7) is provided with an adaptive coaxiality balancing block (9).

5. A CNC machine tool precision detection device as claimed in claim 2, characterized in that: The verticality measuring instrument (12) is detachably mounted on the verticality transverse bracket (11) by means of adjusting bolts, the verticality transverse bracket (11) is height-adjustably mounted on the verticality longitudinal bracket (10) by means of adjusting bolts, and the verticality longitudinal bracket (10) is mounted on the base plate (1) by means of bolts; An adaptive verticality balancing block (14) is provided on the verticality transverse bracket (11).

6. A CNC machine tool precision detection device as claimed in claim 1, characterized in that: The micro centering chuck (3) is coaxially mounted on a chuck shaft (18) via a screw, and a chuck handle (19) is provided on the chuck shaft (18); The chuck shaft (18) is hollow inside and provided with a shaft shoulder; The shaft shoulder is rotatably mounted in the chuck seat (2) via a bearing (20).

7. A CNC machine tool precision detection device as claimed in claim 4, characterized in that: The coaxiality longitudinal bracket (6) is provided with scales from bottom to top; The top cone seat adjustment block (17) is provided with scales from top to bottom.

8. A CNC machine tool precision detection device as claimed in claim 1, characterized in that: The adjustable top cone (5) is provided with a conical head at the head portion and a top cone handle (16) at the tail portion.

9. A CNC machine tool precision detection device as claimed in claim 2, characterized in that: The fixed top cone (13) is provided with a conical head, and an annular oil collecting groove (13a) is provided on the periphery of the conical head. The conical head is used to adapt to the longitudinal machine tool chuck (22) during longitudinal measurement.

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