Horizontal machining center boring test piece, machining method and application thereof

Abstract

The present application relates to a kind of horizontal machining center boring test piece, belong to the technical field of machine tool precision detection method.The structure is: test piece main body is square structure, bottom is connected with mounting base, test piece main body front and back are respectively provided with several head boring test pieces, and front and back head boring test pieces are in position correspondence two by two;Stepped boring test piece is provided on the right side of test piece main body, and milling surface test piece is provided on the left side.The test piece effectively combines each test piece on a test piece main body, and the test method is low in cost, easy to operate and easy to promote, can make machine tool precision detection work more comprehensive, and provide more sufficient test data support for machine tool assembly adjustment, product design improvement and product sales.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of horizontal machining center boring test piece and its processing method and application, belong to the technical field of machine tool precision detection method. BACKGROUND

[0002] At present, when the horizontal machining center machine tool is detected, the single precision of each axis is mainly tested, such as positioning accuracy, repeat positioning accuracy. The actual machining accuracy of machine tool is affected by geometric error of each axis, machine tool running error, thermal error and other factors. It is not enough to intuitively evaluate the machining accuracy of the whole machine by testing the single precision of each axis. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a kind of horizontal machining center boring test piece and its processing method and application. The test piece effectively combines each test piece on a test piece main body. The test method is low in cost, easy to operate and easy to popularize. It can make the machine tool precision detection work more comprehensive, and provide more sufficient test data support for machine tool assembly adjustment, product design improvement and product sales.

[0004] To solve the above problems, the specific technical scheme of the present application is as follows: a kind of horizontal machining center boring test piece, the test piece main body is square structure, the bottom is connected with the mounting base, the test piece main body front and back are respectively provided with a plurality of head boring test pieces, and the head boring test pieces on the front and back are position corresponding two by two;A stepped boring test piece is arranged on the right side of the test piece main body, and a milling surface test piece is arranged on the left side.

[0005] The number of head boring test pieces located on the front and back of the test piece main body is four, two head boring test pieces on the same plane are vertically distributed, and the other two head boring test pieces are horizontally distributed.

[0006] The center of the head boring test piece is provided with a boring hole, and the middle position of the boring hole is provided with a clearance hole.

[0007] The stepped boring test piece is provided with a center stepped hole and eight circumferential stepped holes. The eight circumferential stepped holes are divided into two groups, and the two groups of circumferential stepped holes are circumferentially distributed by two coaxial index circles with different diameters.

[0008] The surface of the milling surface test piece is provided with a boss, and the upper surface of the boss is a vertical plane.

[0009] The processing method of the horizontal machining center boring test piece comprises the following steps:

[0010] 1) Position the test piece main body on the workbench, and find the milling surface test piece boss upper surface by table, to ensure that its parallelism with machine tool X, Y axis is 0.02;Then adjust the boring cutter and perform tool setting operation, complete the test preparation;

[0011] 2) The front surface, right surface and rear surface are planed by disc milling cutter;

[0012] 3) The center of the U-turn boring hole test piece horizontally distributed on the front surface and located at the outermost side is bored, then the worktable is rotated by 180 degrees, the center of the U-turn boring hole test piece horizontally distributed on the rear surface and located at the outermost side is bored, then the center of the U-turn boring hole test piece vertically distributed on the rear surface and located at the upper end is bored, finally the worktable is rotated by 180 degrees, the center of the U-turn boring hole test piece vertically distributed on the front surface and located at the upper end is bored;

[0013] 4) The small-diameter through hole of the center stepped hole of the stepped boring hole test piece on the right side of the test piece is bored, and then the circumferential stepped hole on the small division circle is processed;

[0014] 5) The machine tool is run empty for 1 hour;

[0015] 6) The center of the U-turn boring hole test piece horizontally distributed on the front surface and located at the inner side is bored, then the worktable is rotated by 180 degrees, the center of the U-turn boring hole test piece horizontally distributed on the rear surface and located at the inner side is bored;

[0016] 7) The machine tool is run empty for 1 hour;

[0017] 8) The center of the U-turn boring hole test piece vertically distributed on the front surface and located at the lower end is bored, then the worktable is rotated by 180 degrees, the center of the U-turn boring hole test piece vertically distributed on the rear surface and located at the lower end is bored;

[0018] 9) The circumferential stepped hole of the large division circle of the stepped boring hole test piece on the right side surface of the test piece is processed, the boring cutter processing diameter is increased by 0.2mm, the large-diameter stepped hole of the center stepped hole is bored, and the processing depth is 50% of the thickness of the stepped boring hole test piece;

[0019] 10) The vertical plane of the boss of the milling surface test piece on the left side surface of the test piece is milled.

[0020] The application of the above processing method to the precision judgment of the horizontal machining center comprises the following steps:

[0021] 1) After the test piece is processed, it is placed in a constant temperature environment for constant temperature treatment;

[0022] 2) Using a three-coordinate measuring instrument, taking the center hole of the inner turning and boring test piece as the center of the horizontal distribution of the front surface and the YZ plane as the measurement coordinate system, the hole center coordinates of each turning and boring test piece, the roundness of each boring hole, the coaxiality of the corresponding holes of the front and rear surfaces, the coaxiality of each stepped hole on the stepped boring test piece, the position degree of the circumferential stepped hole on the two index circles of the stepped boring test piece relative to the large stepped hole and the small through hole axis of the center stepped hole, the end surface flatness of the milling surface test piece, the parallelism and perpendicularity between the front, rear, left and right surfaces are measured in sequence;

[0023] 3) Obtain a plurality of machine tool machining precision data through step 2).

[0024] The horizontal machining center boring test piece of the application and the machining method and application thereof have the following advantages:

[0025] 1) The test test piece of the application is only subjected to finish machining during testing, and the test piece has sufficient excess amount and can be reused; meanwhile, the test test piece adopts a split structure, and when the excess amount is insufficient, it can be quickly replaced, thereby saving testing cost and improving testing efficiency;

[0026] 2) The test piece body of the application is hollow and light in weight, which reduces the overall weight of the test piece and the labor intensity of testing under the premise of ensuring the rigidity of the test piece;

[0027] 3) The inner hole of the turning and boring test piece is subjected to groove avoidance processing, which can reduce the boring tool cutting time during testing and avoid the adverse effects of tool wear on the test results;

[0028] 4) The testing process of the application includes test piece cutting and machine tool no-load running, and during the testing process, the machine tool axes are fully operated, and the comprehensive effects of machine tool geometric errors, thermal errors and other factors on machining precision can be displayed on the test piece;

[0029] 5) The application can realize overall evaluation of machine tool machining precision by testing the precision data of the test piece, and can determine the key influencing factors of machine tool machining precision by comparing and analyzing the precision data of the test piece, which has significant advantages in machine tool precision debugging, factory inspection and equipment acceptance. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a front view of the test piece.

[0031] Figure 2 It is a rear view of the test piece.

[0032] Figure 3 It is a left view of the test piece.

[0033] Figure 4 It is a right view of the test piece.

[0034] Figure 5 is a top view of the test piece.

[0035] Figure 6 is Figure 1 is an A-A sectional view.

[0036] Figure 7 is Figure 1 is a B-B sectional view.

[0037] Figure 8 is a sectional view of the face milling test piece. DETAILED DESCRIPTION

[0038] As Figures 1 to 5 shown, a horizontal machining center boring test piece, the test piece body 1 is a square structure, the bottom is connected with the mounting base, the front and rear of the test piece body 1 is respectively provided with a plurality of turning boring test pieces 2, and the front and rear of the turning boring test pieces 2 correspond to each other in position; a stepped boring test piece 3 is arranged on the right side of the test piece body 1, and a face milling test piece 4 is arranged on the left side. The test piece of the application adopts a split structure and is assembled by screws respectively. The assembled test piece can increase the machining aperture during each test to realize the purpose of overall reusable. When the machining allowance of a certain component of the test piece is insufficient, it can be replaced, thereby improving the service life of the overall test piece.

[0039] The number of the turning boring test pieces 2 located on the front and rear of the test piece body 1 is four respectively, two of the turning boring test pieces 2 on the same plane are vertically distributed, and the other two are horizontally distributed.

[0040] As Figure 6 shown, the turning boring test piece 2 is provided with a boring hole 2-1 in the center, and a clearance hole 2-2 is arranged at the middle position of the boring hole 2-1.

[0041] As Figure 7 shown, the stepped boring test piece 3 is provided with a central stepped hole 3-1 and eight circumferential stepped holes 3-2. The eight circumferential stepped holes 3-2 are divided into two groups, and the two groups of circumferential stepped holes 3-2 are circumferentially distributed in two different diameter and coaxial index circles.

[0042] As Figure 8 shown, the surface of the face milling test piece 4 is provided with a boss, and the upper surface of the boss is a vertical plane.

[0043] The machining method of the horizontal machining center boring test piece comprises the following steps:

[0044] 1) Position the test piece body 1 on the workbench, and find the center of the convex surface of the milling surface test piece 4 to ensure that it is parallel to the X and Y axes of the machine tool within 0.02; then adjust the boring cutter and perform the tool setting operation to complete the test preparation;

[0045] 2) Use a disc milling cutter to mill the front surface, right surface, and rear surface;

[0046] 3) Bore the center of the test piece front surface horizontally distributed and located at the outermost turning boring test piece 2; then rotate the workbench by 180 degrees to bore the center of the test piece rear surface horizontally distributed and located at the outermost turning boring test piece 2; then bore the center of the test piece rear surface vertically distributed and located at the upper end turning boring test piece 2; finally, rotate the workbench by 180 degrees to bore the center of the test piece front surface vertically distributed and located at the upper end turning boring test piece 2;

[0047] 4) Perform small diameter through hole boring on the center stepped hole 3-1 of the stepped boring test piece 3 on the right side of the test piece, and then perform processing on the circumferential stepped hole 3-2 on the small division circle;

[0048] 5) Run the machine tool axes empty for 1 hour;

[0049] 6) Bore the center of the test piece front surface horizontally distributed and located at the inner side turning boring test piece 2; then rotate the workbench by 180 degrees to bore the center of the test piece rear surface horizontally distributed and located at the inner side turning boring test piece 2;

[0050] 7) Run the machine tool axes empty for 1 hour;

[0051] 8) Bore the center of the test piece front surface vertically distributed and located at the lower end turning boring test piece 2; then rotate the workbench by 180 degrees to bore the center of the test piece rear surface vertically distributed and located at the lower end turning boring test piece 2;

[0052] 9) Process the circumferential stepped hole 3-2 of the large division circle of the stepped boring test piece 3 on the right side surface of the test piece, increase the boring cutter processing diameter by 0.2 mm, process the large diameter stepped hole of the center stepped hole 3-1, and the processing depth is 50% of the thickness of the stepped boring test piece 3;

[0053] 10) Mill the vertical plane of the convex boss of the milling surface test piece 4 on the left side of the test piece.

[0054] The above processing method for precision judgment of a horizontal machining center includes the following steps:

[0055] 1) After the test test piece is processed, it is placed in a constant temperature environment for constant temperature treatment;

[0056] 2) Using a three-coordinate measuring instrument to measure, the center hole of the inner turning boring test piece 2 with the horizontal distribution of the front surface and located inside the turning boring test piece 2 as the center, the front surface as the YZ plane, a measurement coordinate system is established, and the hole center coordinates of each hole of each turning boring test piece 2, the roundness of each boring hole, the coaxiality of the corresponding holes of each position of the front surface and the rear surface, the coaxiality of each stepped hole on the stepped boring test piece 3, the position degree of the circumferential stepped hole 3-2 on the two index circles of the stepped boring test piece 3 relative to the large stepped hole and the small through hole axis of the center stepped hole 3-1, the end surface flatness of the milling surface test piece 4, the parallelism and the perpendicularity between the front surface, the rear surface, the left surface and the right surface, and the perpendicularity between the surfaces are measured;

[0057] 3) The comprehensive influence of the geometric error, thermal error and other factors of the machine tool on the machining accuracy is obtained through step 2), and the actual machining accuracy is displayed through the test piece, so that the overall evaluation of the machining accuracy of the machine tool can be realized. In addition, by comparing and analyzing the test piece accuracy data, the key influencing factors of the machining accuracy of the machine tool can be determined, and then the production can be guided.

Claims

1. A boring test piece for a horizontal machining center, characterized in that: The main body of the specimen (1) is a square structure, and its bottom is connected to the mounting base. Several turning boring specimens (2) are provided on the front and back of the main body of the specimen (1), and the turning boring specimens (2) on the front and back are in pairs. A stepped boring specimen (3) is provided on the right side of the main body of the specimen (1), and a milled specimen (4) is provided on the left side. There are four turning boring specimens (2) in front of and behind the main body of the specimen (1). Two turning boring specimens (2) on the same plane are vertically distributed, and the other two turning boring specimens (2) are vertically distributed. The horizontal distribution; the center of the turning boring test piece (2) is provided with a boring hole (2-1), and the middle position of the boring hole (2-1) is provided with a clearance hole (2-2); the stepped boring test piece (3) is provided with a central stepped hole (3-1) and eight circumferential stepped holes (3-2), the eight circumferential stepped holes (3-2) are divided into two groups, and the two groups of circumferential stepped holes (3-2) are evenly distributed circumferentially with two pitch circles of different diameters and coaxiality; the surface of the milled test piece (4) is provided with a boss, and the upper surface of the boss is a vertical plane.

2. The machining method for the boring test piece of the horizontal machining center as described in claim 1, characterized in that... Includes the following steps: 1) Position the main body of the test piece (1) on the worktable, use a dial indicator to align the upper surface of the boss of the test piece (4) to ensure that it is parallel to the X and Y axes of the machine tool by 0.02; then perform boring tool adjustment and tool setting operation to complete the test preparation; 2) Use a disc milling cutter to perform planar milling on the front, right, and rear surfaces; 3) Boring the center of the horizontally distributed and outermost turning boring test piece (2) on the front surface of the test piece; then rotating the worktable 180 degrees to bore the center of the horizontally distributed and outermost turning boring test piece (2) on the rear surface; then boring the center of the vertically distributed and uppermost turning boring test piece (2) on the rear surface; finally rotating the worktable 180 degrees to bore the center of the vertically distributed and uppermost turning boring test piece (2) on the front surface. 4) The stepped bore test piece (3) on the right side of the test piece is machined with a small diameter through hole of the center stepped hole (3-1), and then the circumferential stepped hole (3-2) on the small pitch circle is machined. 5) Run each axis of the machine tool idle for 1 hour; 6) Boring the center of the turning boring test piece (2) with horizontal distribution on the front surface and located on the inner side; then rotating the worktable 180 degrees to bore the center of the turning boring test piece (2) with horizontal distribution on the rear surface and located on the inner side. 7) Run each axis of the machine tool idle for 1 hour; 8) Boring the center of the vertically distributed and lower-end rotating boring test piece (2) on the front surface of the test piece; then rotating the worktable 180 degrees to bore the center of the vertically distributed and lower-end rotating boring test piece (2) on the rear surface; 9) Machining the circumferential stepped hole (3-2) of the large pitch circle of the stepped boring test piece (3) on the right side surface of the test piece, increasing the machining diameter of the boring tool by 0.2 mm, and boring the large diameter stepped hole of the center stepped hole (3-1) to a depth of 50% of the thickness of the stepped boring test piece (3); 10) Mill the vertical plane of the boss of test piece (4) on the left side of the test piece.

3. The application of the machining method according to claim 2 to the accuracy judgment of horizontal machining centers, characterized in that... Includes the following steps: 1) Once the test piece is processed, it is placed in a constant temperature environment for constant temperature treatment; 2) Use a coordinate measuring machine to measure. Take the center hole of the horizontally distributed and inner-side turning boring specimen (2) on the front surface as the center and the front surface as the YZ plane to establish a measurement coordinate system. Sequentially check the center coordinates of each hole of each turning boring specimen (2), the roundness of each hole, measure the coaxiality between the holes corresponding to each position on the front and rear surfaces, the coaxiality of each step hole on the stepped boring specimen (3), the position of the circumferential stepped holes (3-2) on the two pitch circles of the stepped boring specimen (3) relative to the axis of the large stepped hole and the small through hole of the center stepped hole (3-1), the flatness of the end face of the milled specimen (4), the parallelism and perpendicularity between the front, back, left and right faces; 3) Multiple machine tool machining accuracy data are obtained through step 2).

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