A device and method for quickly correcting zero position of B axis of machining center

Abstract

The invention discloses a device and method for quickly correcting zero position of B axis of a machining center, comprising a connecting piece, one end of the connecting piece is used to be connected with the main spindle box of the machining center, and the other end is provided with a positioning plate, a dial indicator and a sleeve are respectively fixed on the positioning plate, a sliding rod is provided in the sleeve, a compression spring is provided between one end of the sliding rod and the positioning plate, the other end of the sliding rod extends out of the sleeve and is connected with a roller, and the roller is used to contact the side of the working table of the machining center; a waist-shaped hole is provided on the side of the sleeve, a double-headed screw is connected to the side of the sliding rod, the other end of the double-headed screw extends out of the waist-shaped hole, an "L"-shaped top plate is provided on the double-headed screw, the double-headed screw passes through the bottom surface of the "L"-shaped top plate and is locked by a nut; the side of the "L"-shaped top plate contacts the needle of the dial indicator. The meter reading of the invention is stable and accurate, and the deviation angle can be found by only turning the meter once and walking the X-axis straight line once, which is more scientific, fast and labor-saving, and greatly reduces the labor cost.

Description

Technical Field

[0001] The invention relates to the technical field of casting equipment, and in particular to a device and method for quickly correcting zero position of a B axis of a machining center. Background Art

[0002] There are many horizontal machining centers in the machining workshop. The plane perpendicular to the spindle of the horizontal machining center is the machining plane. Generally, the spindle is the z-axis, and the vertical plane is the xy plane. The axis rotating around the Y-axis is called the B-axis, which is used to connect with the worktable and place the workpiece to be processed on the worktable. When the B-axis fails, it needs to be recalibrated after disassembly and repair.

[0003] Previously, the mechanical zero position of the B-axis was corrected by tapping the edge of the worktable, manually operating the handwheel, moving the X-axis, and checking whether the pointer of the dial indicator changed. If the pointer changed, it was necessary to manually rotate the B-axis angle, tap the table again, and move the X-axis. In this way, the angle was adjusted repeatedly and the straight line was drawn until the pointer no longer changed. The corresponding angle of the B-axis adjustment was then entered into the B-axis zero point offset parameter of the machining center to achieve zero position correction.

[0004] The above correction method has the following disadvantages:

[0005] 1. This method of repeatedly fine-tuning the angle and then pulling the straight line to observe the needle to determine the B-axis angle to be adjusted is troublesome and wastes time and manpower.

[0006] 2. Usually a magnetic meter stand is used for metering. If the X-axis moves faster, especially when the workbench surface is not smooth, the meter needle directly contacts the workbench, and the axial force of the Z-axis movement has too much impact on the meter needle, causing the magnetic meter stand to shake, which is not stable enough and the reading is inaccurate.

[0007] The information disclosed in the above background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0008] In view of the problems existing in the prior art, the present invention provides a device and method for quickly correcting the zero position of the B-axis of a machining center. The device can read the meter stably and accurately, and the deviation angle can be found by only turning the meter once and running the X-axis straight line once. It is more scientific, fast and labor-saving, and greatly reduces labor costs.

[0009] To achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows:

[0010] A device for quickly correcting zero position of B axis of a machining center comprises a connecting piece, one end of which is used to connect with the main spindle box of the machining center, and the other end is provided with a positioning plate, on which a dial indicator and a sleeve are respectively fixed, a sliding rod is provided in the sleeve, a compression spring is provided between one end of the sliding rod and the positioning plate, and the other end of the sliding rod extends out of the sleeve and is connected with a roller, and the roller is used to contact the side of the working table of the machining center;

[0011] A waist-shaped hole is provided on the side of the sleeve, and a double-headed screw is connected to the side of the sliding rod. The other end of the double-headed screw extends out of the waist-shaped hole, and an "L"-shaped top plate is provided on the double-headed screw. The double-headed screw passes through the bottom surface of the "L"-shaped top plate and is locked by a nut; the side of the "L"-shaped top plate contacts the needle of the dial indicator.

[0012] Specifically, the connecting member includes an "L"-shaped connecting plate, the top of the "L"-shaped connecting plate is connected to the spindle box of the machining center by bolts, and the bottom of the "L"-shaped connecting plate is connected to the positioning plate by bolts; a reinforcing angle steel is arranged on the inner corner of the "L"-shaped connecting plate.

[0013] Specifically, a limiting step for limiting the position of the sleeve is processed on the side wall of the sliding rod.

[0014] Specifically, the double-headed screw is processed with a limiting step for limiting the position of the "L"-shaped top plate.

[0015] The present invention also provides a method for quickly correcting the zero position of the B axis of a machining center, using the above-mentioned device for quickly correcting the zero position of the B axis of a machining center, comprising the following steps:

[0016] S1: Return each axis of the machining center to the reference point, fix one end of the connector on the spindle box of the machining center, and then use the hand wheel to move the Z axis so that the roller presses the side surface of the workbench, and adjust the position of the dial indicator needle so that the dial indicator needle presses the side surface of the "L"-shaped top plate and adjusts it to zero;

[0017] S2: Move the worktable of the machining center to the positive direction of the X-axis by a distance L1, check whether the needle of the dial indicator is in the pressing state or the releasing state, and record the value;

[0018] S3: According to the relationship between the inverse tangent trigonometric functions, The B-axis deviation angle α is obtained by inverse tangent calculation;

[0019] S4: According to the pressure gauge status or label placement status, the B-axis mechanical zero position can be corrected by subtracting or adding α from the B-axis zero point offset parameter of the machining center.

[0020] Preferably, the distance L1 that the machining center worktable moves in the positive direction of the X-axis is 100 mm.

[0021] Beneficial effects of the present invention:

[0022] 1. The device of the present invention is provided with rollers and elastic parts, and utilizes axial friction to convert into vertical contact. Compared with the existing magnetic meter frame, it can more effectively buffer the impact caused by relative movement, avoid errors caused by the vibration of the dial indicator, and ensure more accurate measurement values;

[0023] 2. The present invention only needs to make a table once and walk the X-axis straight line once to find the deviation angle through the inverse tangent trigonometric function relationship, and enter the parameter correction zero position from the surface, which is more scientific, fast and labor-saving, and can also be applied to the B-axis zero position correction of other machining center equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic diagram of the structural connection of a device for quickly correcting the zero position of the B-axis of a machining center.

[0025] Figure 2 for Figure 1 Enlarged view of point A in .

[0026] Figure 3 It is a cross-sectional view of the interior of the sleeve of the present invention.

[0027] Figure 4 The present invention is a flow chart of a method for quickly correcting the zero position of the B-axis of a machining center.

[0028] In the figure, 1-connecting part, 101-"L" shaped connecting plate, 102-reinforced angle steel, 2-machining center spindle box, 3-positioning plate, 4-dial indicator, 5-sleeve, 6-slide rod, 7-compression spring, 8-roller, 9-machining center worktable, 10-waist hole, 11-double-headed screw, 12-"L" shaped top plate, 13-nut, 14-machining center B axis. DETAILED DESCRIPTION

[0029] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is a description of the embodiments in conjunction with the accompanying drawings.

[0030] Example 1

[0031] like Figure 1-3 As shown, the present invention provides a device for quickly correcting the zero position of the B axis of a machining center, including a connecting member 1 as a main connecting body, specifically, the connecting member 1 includes an "L"-shaped connecting plate 101, and a reinforcing angle steel 102 is arranged on the inner corner of the "L"-shaped connecting plate 101; the top of the "L"-shaped connecting plate 101 is connected to the main spindle box 2 of the machining center by bolts, and the bottom of the "L"-shaped connecting plate 101 is connected to a positioning plate 3 by bolts, and a dial indicator 4 and a sleeve 5 are arranged horizontally and side by side on the positioning plate 3, specifically, the dial indicator 4 is tightened and fixed by bolts, and its needle is horizontal to the side of the machining center worktable 9; the sleeve 5 is as shown Figure 3 As shown, it is laterally fixed to the left side of the positioning plate 3 by bolts, a sliding rod 6 is arranged in the sleeve 5, a compression spring 7 is arranged between one end of the sliding rod 6 and the positioning plate 3, the other end of the sliding rod 6 extends out of the sleeve 5 and is connected to a roller 8, and the roller 8 is used to contact the side of the working table 9 of the machining center; a limiting step for the sleeve 5 is processed on the side wall of the sliding rod 6; a waist-shaped hole 10 is arranged on the side of the sleeve 5, a double-headed screw 11 is connected to the side of the sliding rod 6, the other end of the double-headed screw 11 extends out of the waist-shaped hole 10, an "L"-shaped top plate 12 is arranged on the double-headed screw 6, and a limiting step for the "L"-shaped top plate 12 is processed on the side wall of the double-headed screw 6, the double-headed screw 11 passes through the bottom surface of the "L"-shaped top plate 12 and is locked by a nut 13; the side of the "L"-shaped top plate 12 contacts the needle of the dial indicator 4.

[0032] When correcting the mechanical zero position of the B-axis 14 of the machining center, the roller 8 contacts the side of the machining center worktable 9. By moving the machining center worktable 9 in the direction of the X-axis, that is, the side of the machining center worktable 9 and the roller 8 move relative to each other, the roller 8 can reduce the friction of the relative movement to a minimum; when the machining center worktable 9 deviates in one direction, the roller 8 is subjected to the pressure of the Z-axis during the relative movement, and the roller 8 transmits the force to the slide bar 6. The slide bar 6 slides smoothly in the sleeve 5 through the compression spring 7, driving the double-headed screw 11 to move within the length of the waist-shaped hole 10, thereby driving the "L"-shaped top plate 12 to move against the needle to change the reading of the dial indicator 4, thereby obtaining the range of change. During this process, the contact between the "L"-shaped top plate 12 and the dial indicator 4 is axial contact, which eliminates the influence of reading errors caused by sliding friction in the prior art, and can ensure more accurate measurement values; on the contrary, when the machining center worktable 9 deviates in another direction, the roller 8 is always pressed against the side of the machining center worktable 9 under the action of the compression prestress of the compression spring 7, and at the same time drives the "L"-shaped top plate 12 to move, causing the reading of the dial indicator 4 to change, thereby obtaining the range of change.

[0033] In summary, the present invention, by setting a roller and an elastic part, utilizes axial friction to convert into vertical contact. Compared with the existing magnetic meter frame, it can more effectively buffer the impact caused by rotation, avoid causing the dial indicator to vibrate and produce errors, ensure more accurate measurement values, and ultimately achieve the purpose of the present invention.

[0034] Example 2

[0035] like Figure 4 As shown, this embodiment uses the device of embodiment 1 to perform a method for quickly correcting the zero position of the B axis of a machining center, and the steps are as follows:

[0036] S1: Return each axis of the machining center to the reference point, fix one end of the connector 1 on the spindle box 2 of the machining center, and then use the hand wheel to move the Z axis so that the roller 8 presses the side surface of the workbench, and adjust the needle position of the dial indicator 4 so that the needle of the dial indicator 4 presses the side surface of the "L"-shaped top plate 12 with a certain prestress, and then adjust the dial indicator 4 to zero;

[0037] S2: Move the worktable 9 of the machining center 100mm in the positive direction of the X axis, and check that the needle of the dial gauge 4 is in the pressure gauge state. The pressure gauge value is 0.06mm, which proves that the B axis has deviated from the angle in the clockwise direction;

[0038] S3: According to the relationship between the inverse tangent trigonometric functions, The B-axis deviation angle α is calculated;

[0039] S4: Subtract 0.0344 from the zero point offset parameter of the B axis of the machining center to calibrate the 14th zero position of the B axis of the machining center.

[0040] Example 3

[0041] The difference between this embodiment and embodiment 2 is that in this test, the X-axis moves 100mm in the positive direction and the table is 0.08mm, which proves that the B-axis has deviated from the angle in the counterclockwise direction. The deviation angle can be calculated by the formula Then add 0.0458 to the B-axis zero point offset parameter of the machining center to correct the B-axis zero position.

[0042] In the above-mentioned embodiment 2 and embodiment 3, the B deviation angle calculated when the X axis travels a distance of 100 mm and a longer distance is the same. The longer the distance, the greater the pressure gauge or release gauge value. According to the proportional relationship, their tangent values ​​are The angles calculated are the same, and the reason for going 100mm is to make it easier to calculate the tangent value, but it is not limited to this.

[0043] Examples 2 and 3 show that the apparatus and method of the embodiments can be used to quickly correct the zero position of the B-axis of the machining center. It only takes one time to make a table and walk the X-axis straight line once to find the deviation angle through the inverse tangent trigonometric function relationship, and enter the parameter correction zero position from the surface. This is more scientific, fast and labor-saving, and can also be applied to the B-axis zero position correction of other machining center equipment, and has a good application prospect.

[0044] Although the present invention has been described in detail above with specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A method for quickly correcting the zero position of the B axis of a machining center, using a device for quickly correcting the zero position of the B axis of a machining center, characterized in that: The B-axis rapid zero-position correction device for the machining center comprises a connecting member (1), one end of the connecting member (1) is used to be connected to the main spindle box (2) of the machining center, and the other end is provided with a positioning plate (3), a dial indicator (4) and a sleeve (5) are respectively fixed on the positioning plate (3), a sliding rod (6) is provided in the sleeve (5), a compression spring (7) is provided between one end of the sliding rod (6) and the positioning plate (3), the other end of the sliding rod (6) extends out of the sleeve (5) and is connected to a roller (8), and the roller (8) is used to contact the side of a working table (9) of the machining center; The side of the sleeve (5) is provided with a waist-shaped hole (10), the side of the slide rod (6) is connected with a double-headed screw (11), the other end of the double-headed screw (11) extends out of the waist-shaped hole (10), and an "L"-shaped top plate (12) is provided on the double-headed screw (11), and the double-headed screw (11) passes through the bottom surface of the "L"-shaped top plate (12) and is locked by a nut (13); the side of the "L"-shaped top plate (12) contacts the needle of the dial indicator (4); The method comprises the following steps: S1: Return each axis of the machining center to the reference point, fix one end of the connecting piece (1) on the spindle box (2) of the machining center, and then use the hand wheel to move the Z axis so that the roller (8) presses against the side surface of the workbench, and adjust the position of the dial indicator (4) so ​​that the needle of the dial indicator (4) presses against the side surface of the "L"-shaped top plate (12) and adjust it to zero; S2: Move the machining center worktable (9) in the positive direction of the X-axis by a distance L1, check whether the needle of the dial indicator (4) is in the pressure gauge state or the release gauge state, and record the gauge value; S3: According to the inverse tangent trigonometric function relationship, α=Arctanα=Arctanα =Arc , the B-axis deviation angle α is obtained by inverse tangent calculation; S4: According to the table pressing state or table releasing state, the B-axis mechanical zero position can be corrected by subtracting or adding α from the B-axis zero point offset parameter of the machining center.

2. The method for quickly correcting the zero position of the B axis of a machining center according to claim 1, characterized in that: The connecting member (1) comprises an "L"-shaped connecting plate (101), the top of the "L"-shaped connecting plate (101) being connected to a main spindle box (2) of a machining center via bolts, and the bottom of the "L"-shaped connecting plate (101) being connected to a positioning plate (3) via bolts; and a reinforcing angle steel (102) is provided on the inner corner of the "L"-shaped connecting plate (101).

3. The method for quickly correcting the zero position of the B axis of a machining center according to claim 1, characterized in that: A limiting step for limiting the position of the sleeve (5) is machined on the side wall of the slide rod (6).

4. The method for quickly correcting the zero position of the B axis of a machining center according to claim 1, characterized in that: The double-headed screw (11) is machined with a limiting step for limiting the position of the "L"-shaped top plate (12).

5. The method for quickly correcting the zero position of the B axis of a machining center according to claim 1, characterized in that: The distance L1 that the machining center worktable (9) moves in the positive direction of the X-axis is 100 mm.

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