Turning center machine precision testing piece, machining method and application thereof

Abstract

The present application relates to a kind of turning center machine precision test piece and its processing method and application, belong to the technical field of machine precision detection method.Its structure is: test piece main body is divided into two parts, lower part is cylindrical structure, upper part is regular octagonal prism, four side milling circle test piece and four side drilling test piece are alternately arranged on eight edges;A boss is provided on the upper surface of test piece main body, the boss is coaxially connected with annular top milling circle test piece, the inner circumference of top milling circle test piece is provided with end face drilling test piece, and end face drilling test piece is connected with test piece main body.The precision test piece realizes machine tool C, X axis linkage interpolation milling, X, Y axis linkage interpolation milling, Y, Z axis linkage interpolation milling and X axis, Z axis drilling tapping action by the effective distribution of test piece, according to test piece processing method, the test piece shape is processed, and the machining accuracy of multiple machine tools is measured, which can effectively solve the problem of insufficient turning center machine precision test work.

Description

Technical Field

[0001] This invention relates to a precision test piece for turning center machine tools, its processing method and application, belonging to the technical field of machine tool precision testing methods. Background Technology

[0002] Currently, domestic machine tool manufacturers primarily focus on turning performance when conducting precision testing on turning centers, with testing mainly centered on assessing turning machining accuracy. For milling, the focus is primarily on testing machine tool movements, such as the rotation of the power tool and C-axis positioning. Precision testing is limited to end-face polygon milling tests or GB / T16462.6-M3 specimen milling tests. However, these milling tests only include C-axis and X-axis simultaneous machining processes for end-face features, omitting drilling, tapping, and side Y-axis simultaneous machining processes. This results in insufficient machine tool testing and deficiencies in evaluating the accuracy of turning centers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a precision test piece for turning center machine tools, its processing method and application. The precision test piece, through the effective distribution of the test piece, enables the machine tool to perform C and X axis linkage interpolation milling, X and Y axis linkage interpolation milling, Y and Z axis linkage interpolation milling, and X and Z axis drilling and tapping operations on the test piece. The test piece shape is obtained by processing according to the test piece processing method, and multiple machining accuracies of the machine tool are measured. This can effectively solve the problem of insufficient precision testing work for turning center machine tools.

[0004] To solve the above problems, the specific technical solution of the present invention is as follows: A precision test piece for a turning center machine tool includes a test piece body, a top milled circular test piece, an end face drilling and tapping test piece, a side milled circular test piece, and a side face drilling and tapping test piece; wherein the test piece body is divided into upper and lower parts, the lower part is a cylindrical structure, and the upper part is a regular octagonal prism, and four side milled circular test pieces and four side face drilling and tapping test pieces are alternately arranged on the eight edges; a boss is provided on the upper surface of the test piece body, and a ring-shaped top milled circular test piece is coaxially connected to the boss, and an end face drilling and tapping test piece is provided on the inner circumference of the top milled circular test piece, and the end face drilling and tapping test piece is connected to the test piece body.

[0005] The test specimen body and the side milled round test specimen are connected by a stop on the edge. The inner surface of the side milled round test specimen is coaxially set in the stop. The middle part of the side milled round test specimen is provided with a flange connected to the test specimen body. The outer end of the flange is provided with a machined cylinder I perpendicular to the connecting edge.

[0006] The top-milled circular specimen is a ring-cylinder structure with four circumferentially distributed machined cylinders II at its upper end; a reference C is provided on one side of the circumference of the ring-cylinder structure; a stop is provided on the bottom surface of the top-milled circular specimen, and the stop rests on the boss on the upper surface of the specimen body.

[0007] The inner circumference of the top-milled circular specimen has four circumferentially distributed slots and through holes. The end-face drilled specimen is set inside the top-milled circular specimen and arranged coaxially with the specimen body. Screws pass through the through holes and the positioning holes of the end-face drilled specimen and are connected to the upper surface of the specimen body. The end-face drilled specimen has a cylinder at its center, and a machining center hole is located at the center of the cylinder. Several vertical tapping holes are machined on the upper surface of the end-face drilled specimen. The vertical tapping holes are evenly distributed circumferentially with the axis of the machining center hole as the center.

[0008] The axis of the machining center hole is reference B.

[0009] The side-drilled test piece is provided with a horizontal cylinder, and the outer end face of the horizontal cylinder is provided with a horizontal tapping hole.

[0010] The machining method based on the precision test piece of the turning center machine tool includes the following steps:

[0011] 1) Clamp the cylindrical structure of the lower part of the specimen body in the chuck of the turning center, and complete the tool setting operation of the milling cutter, drill and tap in sequence;

[0012] 2) Machining of the top milled circular specimen: Using an end mill, the end face of the top milled circular specimen is milled using the C and X axis linkage method, as reference A; the outer circular surface is milled, as reference C; the outer circumference of the four machining cylinders II of the top milled circular specimen is milled using the X and Y axis linkage method.

[0013] 3) Machining of the end face drilling and tapping test piece: Using an end mill, the machining center hole of the end face drilling and tapping test piece is milled using the C and X axis linkage method, and the axis of the machining center hole is used as the reference B; use a drill bit to drill the threaded bottom hole on the end face drilling and tapping test piece, and use a tap to tap the end face drilling and tapping test piece to form a vertical tapping hole.

[0014] 4) Machining of the side milled circular specimen: Using an end mill, the machining cylinder I and the outer end face of the side milled circular specimen are milled using a Y and Z axis linkage method;

[0015] 5) Machining of the side drilling and tapping test piece: Use an end mill to mill the outer end face of the side drilling and tapping test piece in a Y and Z axis linkage manner, use a drill bit to drill the threaded bottom hole on the side drilling and tapping test piece, and use a tap to drill the horizontal tapping hole on the side.

[0016] The application of test piece-based machining methods in judging machine tool machining accuracy includes the following steps:

[0017] 1) Remove the specimen from the chuck and let it stand in a constant temperature environment for 24 hours;

[0018] 2) Use a thread gauge to check the accuracy of tapped threads;

[0019] 3) Inspect the test piece using a coordinate measuring machine:

[0020] 3.1) Diameter, roundness, and cylindricity inspection: Inspect the diameter and roundness of the machined cylinder I of the side-milled round specimen; the machined cylinder II of the top-milled round specimen; and the diameter, roundness, and cylindricity of the center hole of the end-face drilled and tapped specimen.

[0021] 3.2) Position accuracy inspection: Inspect the position accuracy of the machined cylinder II axis of the top milled specimen relative to datum B;

[0022] 3.3) Coaxiality test: The coaxiality of the four milled cylindrical test pieces arranged at 180° on the sides is tested to ensure that they are aligned with each other.

[0023] 3.4) Inclination test: Detect the inclination of the outer end face of the milled round specimen on each of the four sides relative to the reference C;

[0024] 3.5) Perpendicularity and parallelism test: Detect the perpendicularity of the outer end face of the milled round test piece on the four sides, the outer end face of the drilled and tapped test piece on the four sides, and the axis of the machining center hole of the drilled and tapped test piece on the end face relative to datum A; Detect the perpendicularity and parallelism of the outer end face of the drilled and tapped test piece on the four sides relative to datum C.

[0025] 3.6) The machining accuracy of the machine tool can be directly determined by the values ​​detected in steps 3.1 to 3.5.

[0026] The precision test piece for turning center machine tools, its machining method, and its application in this application adopt the above-mentioned technical solution and have the following advantages:

[0027] The test piece adopts a split structure, with each part connected and assembled by screws. During testing, the test piece only undergoes fine machining. The main body of the test piece and the milled round test piece can be reused, which can minimize testing time and reduce material costs.

[0028] By testing the machining accuracy of test pieces, the accuracy of machine tools can be evaluated. A single test can provide a comprehensive assessment of multiple aspects of a machine tool's accuracy, offering significant advantages in machine tool factory inspection and equipment acceptance. Attached Figure Description

[0029] Figure 1 This is a top view of the test piece.

[0030] Figure 2 for Figure 1 AA rotated sectional view.

[0031] Figure 3 This is a front sectional view of the main body of the specimen.

[0032] Figure 4 This is a top view of the main body of the specimen.

[0033] Figure 5 This is a top view of a milled circular specimen.

[0034] Figure 6 for Figure 5 BB rotated sectional view.

[0035] Figure 7 Cross-sectional view of the drilled and tapped specimen at the front end of the machining process.

[0036] Figure 8 Cross-sectional view of the drilled and tapped specimen at the rear end of the machining process.

[0037] Figure 9 Structural diagram of the milled circular specimen from the side.

[0038] Figure 10 This is a cross-sectional view of the test piece before machining, showing the side drilling and tapping process.

[0039] Figure 11 This is a cross-sectional view of the drilled specimen after machining. Implementation

[0040] like Figures 1 to 11 As shown, a precision test piece for a turning center machine tool includes a main body 1, a top milled circular test piece 2, an end face drilling and tapping test piece 3, a side milled circular test piece 4, and a side drilling and tapping test piece 5. The main body 1 is divided into upper and lower parts; the lower part is a cylindrical structure, and the upper part is a regular octagonal prism. Four side milled circular test pieces 4 and four side drilling and tapping test pieces 5 are alternately arranged on the eight prism faces. A boss is provided on the upper surface of the main body 1, and a ring-shaped top milled circular test piece 2 is coaxially connected to the boss. An end face drilling and tapping test piece 3 is provided on the inner circumference of the top milled circular test piece 2, and the end face drilling and tapping test piece 3 is connected to the main body 1. Figure 3 As shown, the specimen body 1 is machined with weight-reducing holes, which can reduce the overall weight of the specimen while ensuring its rigidity.

[0041] The test specimen body 1 and the side milled round test specimen 4 are connected by a stop on the edge. The inner surface of the side milled round test specimen 4 is coaxially set in the stop. The middle part of the side milled round test specimen 4 is provided with a flange connected to the test specimen body 1. The outer end of the flange is provided with a machined cylinder I4-1 perpendicular to the connecting edge.

[0042] The top-milled circular specimen 2 is a ring-column structure with four circumferentially distributed machining cylinders II2-1 at its upper end; a reference C is provided on one side of the circumference of the ring-column structure; a stop is provided on the bottom surface of the top-milled circular specimen 2, and the stop sits on the boss on the upper surface of the specimen body 1.

[0043] Four circumferentially distributed slots and through holes are provided on the inner circumference of the top milled circular specimen 2. The end face drilled specimen 3 is arranged coaxially with the specimen body 1 inside the top milled circular specimen 2. Screws pass through the through holes and the positioning holes of the end face drilled specimen 3 and are connected to the upper surface of the specimen body 1. The end face drilled specimen 3 has a cylinder at its center, and a machining center hole 3-1 is provided at the center of the cylinder. Several vertical tapping holes 3-2 are machined on the upper surface of the end face drilled specimen 3. The vertical tapping holes 3-2 are evenly distributed circumferentially with the axis of the machining center hole 3-1 as the center.

[0044] The axis of the machining center hole 3-1 is reference B.

[0045] The side-drilling test piece 5 is provided with a horizontal cylinder, and the end face of the horizontal cylinder is provided with a horizontal tapping hole 5-1.

[0046] The machining method for the precision test piece based on the above-mentioned turning center machine tool includes the following steps:

[0047] 1) Clamp the cylindrical structure of the lower part of the specimen body 1 in the chuck of the turning center, and complete the tool setting operation of the milling cutter, drill and tap in sequence;

[0048] 2) Machining of the top milled circular specimen 2: Using an end mill, the end face of the top milled circular specimen 2 is milled using the C and X axis linkage method, as reference A; the outer circular surface is milled, as reference C; the outer circumference of the four machining cylinders II2-1 of the top milled circular specimen 2 is milled using the X and Y axis linkage method.

[0049] 3) Machining of end face drilling and tapping specimen 3: Using an end mill, the machining center hole 3-1 of the end face drilling and tapping specimen 3 is milled in a C and X axis linkage manner, with the axis of the machining center hole 3-1 as the reference B; using a drill bit to drill the threaded bottom hole on the end face drilling and tapping specimen 3, and using a tap to tap the end face drilling and tapping specimen 3 to form a vertical tapping hole 3-2;

[0050] 4) Machining of the side milled circular specimen 4: Using an end mill, the machining cylinder I4-1 and the outer end face of the side milled circular specimen 4 are milled using the Y and Z axis linkage method;

[0051] 5) Machining of side drilling and tapping specimen 5: Use an end mill to mill the outer end face of the side drilling and tapping specimen 5 in a Y and Z axis linkage manner, use a drill bit to drill the threaded bottom hole on the side drilling and tapping specimen 5, and use a tap to drill the horizontal tapping hole 5-1 on the side.

[0052] To ensure the overall test piece can be subjected to multiple precision tests on different machine tools, the position remains unchanged each time, and the cutting amount is continuously increased. When a certain side milled round test piece 4 reaches its processing limit and can no longer meet the testing requirements, it can be removed and replaced with a new side milled round test piece. During each drilling and tapping process, the end face drilling and tapping test piece 3 and one side drilling and tapping test piece 5 on one edge are machined respectively. The end face drilling and tapping test piece 3 is replaced after each machining. After the side drilling and tapping test pieces 5 have been machined four times, and all four side drilling and tapping test pieces 5 have been machined, all four side drilling and tapping test pieces 5 are replaced at once to maximize the reusability of the test pieces and thus improve the service life of the overall test piece.

[0053] The application of the aforementioned test piece machining method in judging machine tool machining accuracy includes the following steps:

[0054] 1) Remove the specimen from the chuck and let it stand in a constant temperature environment for 24 hours;

[0055] 2) Use a thread gauge to check the accuracy of tapped threads;

[0056] 3) Inspect the test piece using a coordinate measuring machine:

[0057] 3.1) Diameter, roundness, and cylindricity inspection: Inspect the diameter and roundness of the machined cylinder I4-1 of the side milled round test piece 4; the machined cylinder II2-1 of the top milled round test piece 2; and the diameter, roundness, and cylindricity of the center hole 3-1 of the end face drilled and tapped test piece 3.

[0058] 3.2) Positional accuracy inspection: Inspect the positional accuracy of the axis of the machined cylinder II2-1 of the top milled specimen 2 relative to the datum B;

[0059] 3.3) Coaxiality test: The coaxiality of the machined cylindrical surfaces I of the four milled cylindrical test pieces 4, which are aligned at 180°, is tested to ensure that they serve as references to each other.

[0060] 3.4) Inclination test: Detect the inclination of the four outer end faces of the milled round specimens relative to the reference C;

[0061] 3.5) Perpendicularity and parallelism test: Detect the perpendicularity of the outer end face of the four side-milled round test pieces 4, the outer end face of the four side-drilled test pieces 5, and the axis of the machining center hole 3-1 of the end-face drilled test piece 3 relative to datum A; Detect the perpendicularity and parallelism of the outer end face of the four side-drilled test pieces 5 relative to datum C.

[0062] 3.6) The machining accuracy of the machine tool can be directly determined by the values ​​detected in steps 3.1 to 3.5.

[0063] Using the above methods, during the sample processing, the correctness of the C-axis rotation and power head rotation direction of the machine tool, the continuity of the tapping action, and the effectiveness of the linkage action of each axis of the machine tool can be verified. After the sample processing is completed, the overall evaluation of multiple machining accuracy of the machine tool can be achieved by inspecting the sample, making the machine tool accuracy testing work more comprehensive and providing more sufficient test data support for machine tool assembly and adjustment, product design improvement, and product sales.

Claims

1. A precision test piece for a turning center machine tool, characterized in that: The test specimen includes a main body (1), a top milled circular test specimen (2), an end face drilled and tapped test specimen (3), a side milled circular test specimen (4), and a side drilled and tapped test specimen (5). The main body (1) is divided into two parts: the lower part is a cylindrical structure, and the upper part is a regular octagonal prism. Four side milled circular test specimens (4) and four side drilled and tapped test specimens (5) are alternately arranged on eight edges. A boss is provided on the upper surface of the main body (1), and a ring-shaped top milled circular test specimen (2) is coaxially connected to the boss. An end face drilled and tapped test specimen (3) is provided on the inner circumference of the top milled circular test specimen (2), and the end face drilled and tapped test specimen (3) is connected to the main body (1). The edge connecting the main body (1) and the side milled circular test specimen (4) is provided with a stop. The inner surface of the side milled circular test specimen (4) is coaxially arranged in the stop. A flange connected to the main body (1) is provided in the middle of the side milled circular test specimen (4), and the outer end of the flange is provided with a stop. There is a machining cylinder I (4-1) perpendicular to the connecting edge; the top milled round test piece (2) is a ring cylinder structure, and four circumferentially distributed machining cylinders II (2-1) are provided at its upper end; a reference C is provided on one side of the circumference of the ring cylinder structure; four circumferentially distributed opening slots and through holes are provided on the inner circumference of the top milled round test piece (2); the end face drilling test piece (3) is set inside the top milled round test piece (2) and arranged coaxially with the test piece body (1); the screw passes through the through hole and the positioning hole of the end face drilling test piece (3) and is connected to the upper surface of the test piece body (1); a cylinder is provided at the center of the end face drilling test piece (3), and a machining center hole (3-1) is provided at the center of the cylinder; several vertical tapping holes (3-2) are machined on the upper surface of the end face drilling test piece (3); a horizontal cylinder is provided on the side drilling test piece (5), and a horizontal tapping hole (5-1) is provided on the end face of the horizontal cylinder.

2. The precision test piece for turning center machine tools according to claim 1, characterized in that: A stop is provided on the bottom surface of the top milled circular specimen (2), and the stop is located on the boss on the upper surface of the specimen body (1).

3. The precision test piece for turning center machine tools according to claim 1, characterized in that: The vertical tapping holes (3-2) are evenly distributed around the axis of the machining center hole (3-1).

4. The precision test piece for turning center machine tools according to claim 1, characterized in that: The axis of the machining center hole (3-1) is reference B.

5. The machining method for precision test pieces on a turning center machine tool according to claim 1, characterized in that... Includes the following steps: 1) The cylindrical structure of the lower part of the specimen body (1) is clamped in the chuck of the turning center, and the tool setting operations of the milling cutter, drill and tap are completed in sequence; 2) Machining of the top milled circular specimen (2): Using an end mill, the end face of the top milled circular specimen (2) is milled in a C and X axis linkage manner as reference A; the outer circular surface is milled as reference C; the outer circumference of the four machining cylinders II (2-1) of the top milled circular specimen (2) is milled in an X and Y axis linkage manner. 3) Machining of end face drilling and tapping test piece (3): Using an end mill, the machining center hole (3-1) of the end face drilling and tapping test piece (3) is milled in a C and X axis linkage manner, and the axis of the machining center hole (3-1) is used as reference B; the threaded bottom hole is drilled on the end face drilling and tapping test piece (3) using a drill bit, and the end face drilling and tapping test piece (3) is tapped to form a vertical tapping hole (3-2). 4) Machining of the side milled circular test piece (4): Using an end mill, the machining cylinder I (4-1) and the outer end face of the side milled circular test piece (4) are milled using the Y and Z axis linkage method; 5) Machining of the side drilling and tapping test piece (5): Use an end mill to mill the outer end face of the side drilling and tapping test piece (5) in the Y and Z axis linkage mode, use a drill bit to drill the thread bottom hole on the side drilling and tapping test piece (5), and use a tap to drill the horizontal tapping hole (5-1) on the side.

6. The application of the machining method for the test piece according to claim 5 in judging the machining accuracy of machine tools, characterized in that... Includes the following steps: 1) Remove the specimen from the chuck and let it stand in a constant temperature environment for 24 hours; 2) Use a thread gauge to check the accuracy of tapped threads; 3) Inspect the test piece using a coordinate measuring machine: 3.1) Diameter, roundness, and cylindricity inspection: Inspect the machined cylinder I (4-1) of the side milled round specimen (4) respectively; inspect the top milled round The diameter and roundness of the machining cylinder II (2-1) of the specimen (2); the diameter, roundness, and cylindricity of the machining center hole (3-1) of the end face drilling and tapping specimen (3); 3.2) Positional accuracy test: The positional accuracy of the machined cylinder II (2-1) axis of the top milled specimen (2) relative to the datum B is tested; 3.3) Coaxiality test: The coaxiality of the four side-milled round test pieces (4) with the machined cylinder I (4-1) set at 180° alignment is tested to ensure that they are mutually referenced. 3.4) Inclination test: The inclination of the outer end face of the four milled round specimens (4) relative to the reference C was measured; 3.5) Perpendicularity and parallelism test: Test the perpendicularity of the axis of the machining center hole (3-1) of the four side milled round test pieces (4) to the outer end face, the four side drilled test pieces (5) to the outer end face, and the end face drilled test piece (3) to the reference A; test the perpendicularity and parallelism of the outer end face of the four side drilled test pieces (5) to the reference C. 3.6) The machining accuracy of the machine tool can be directly determined by the values ​​detected in steps 3.1 to 3.5.

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