Calibrating device for tool zero positioning measuring instrument of numerical control machine tool

Abstract

The invention relates to a calibration device for a zero positioning measuring instrument of a numerical control machine tool cutter. A guide rail is fixed on a base through a bolt; the measuring instrument clamping and positioning device is fixed on the base through a V-shaped seat; the grating movement measuring mechanism is fixed on the base through a bolt; a hand wheel 16 is connected to the reading head through a lead screw; the reading head is connected to the disc-shaped measuring head through a measuring rod; the reading head is connected with the photoelectric receiver through a cable c; the photoelectric receiver is connected with the data processor through a cable a; and the data processor is connected with the display screen through a cable b. The zero positioning measuring instrument clamping and positioning device is composed of a pressure spring, a positioning head and a V-shaped seat, and after the measuring instrument is inserted into the measuring instrument clamping and positioning device, the positioning head automatically locks and positions the measuring instrument under the action of the pressure spring. The method is suitable for calibrating various numerical control machine tool cutter zero positioning measuring instruments. The device is high in calibration precision, easy to operate, high in efficiency, economical and practical.

Description

Technical Field

[0001] The invention relates to the field of measurement technology, and in particular to a calibrating device for a tool zero-position positioning measuring instrument for a numerically controlled machine tool. Background Art

[0002] With the rapid development of the aviation manufacturing industry, the requirements for the precision of engine parts are getting higher and higher. In particular, the tool positioning link is particularly important in CNC machining. If the tool positioning is inaccurate, it will directly affect the quality of the engine product and bring hidden dangers to production. Therefore, it is particularly important to calibrate the tool zero position positioning measuring instrument of CNC machine tools.

[0003] The probe diameter of the tool zero-position measuring instrument for CNC machine tools is large (Ф50mm) and the measuring force is large, so it cannot be calibrated using the current traditional methods. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool; the specific technical scheme is as follows:

[0005] A calibrating device for a tool zero-position measuring instrument for a numerically controlled machine tool, comprising a grating ruler moving measuring mechanism, a grating reading mechanism, a measuring instrument clamping and positioning device, a guide rail, and a base;

[0006] A dovetail groove is provided at one end of the base, and the V-shaped seat is arranged in the dovetail groove; a measuring instrument clamping and positioning device is arranged at the upper end of the V-shaped seat, and the measuring instrument clamping and positioning device is fixed to the V-shaped seat by screws;

[0007] The grating moving measuring mechanism is arranged corresponding to the clamping and positioning device of the measuring instrument and is fixed on the base by bolts;

[0008] The guide rail is fixed on both sides of the base by bolts; one end is flush with the end of the base, and the other end is against the grating ruler moving measurement mechanism; the measured part is placed on the guide rail to adjust the position of the measured part;

[0009] The grating ruler moving measuring mechanism comprises a housing, a grating ruler, a reading head, a hand wheel, a lead screw, a measuring rod, and a display screen;

[0010] The grating ruler and the reading head are placed in the housing;

[0011] The hand wheel is arranged at the rear end of the grating ruler moving measuring mechanism, and is connected to the reading head through a lead screw extending along the rear end of the housing;

[0012] The side rod is arranged at the front end of the grating ruler moving measuring mechanism, one end of the side rod extends along the front end of the shell and is connected to the reading head, and the other end is connected to the disc-shaped probe;

[0013] The display screen is arranged on the outer wall of the housing, a reset button is arranged on one side of the display screen, and a switch is arranged at the lower end;

[0014] The reading head is connected to the photoelectric receiver through a cable; the photoelectric receiver is connected to the data processor through a cable a; the data processor is connected to the display screen through a cable b;

[0015] The measuring instrument clamping and positioning device comprises a positioning seat, a compression spring, a positioning head, a dial and a measuring instrument;

[0016] A mounting circular hole is provided at the center of the positioning seat, and three mounting grooves are provided along the circumference of the mounting circular hole. The mounting grooves are arranged in a concave shape and are evenly distributed;

[0017] The positioning head and the compression spring are arranged in the installation groove, wherein the compression spring supports the positioning head, and the clamping claw of the positioning head extends out of the installation groove and is placed in the installation circular hole. When the measuring instrument is inserted into the measuring instrument clamping and positioning device, the positioning head automatically adopts three-point elastic automatic locking and positioning for the measuring instrument under the action of the compression spring;

[0018] The dial is arranged on the upper end of the circular hole of the positioning seat.

[0019] The preferred embodiment of the calibrating device for the tool zero position measuring instrument of a numerically controlled machine tool is that the lead screw in the grating ruler moving measuring mechanism adopts a trapezoidal thread screw.

[0020] The preferred solution of the calibrating device for the tool zero position positioning measuring instrument of a numerically controlled machine tool is that the handwheel adopts a large diameter handwheel to obtain large torque for easy rotation measurement.

[0021] The preferred solution of the calibrating device for the tool zero position measuring instrument of a numerically controlled machine tool is that the disc-shaped probe adopts a ribbed working surface.

[0022] The preferred embodiment of the calibrating device for the tool zero-position positioning measuring instrument of a numerically controlled machine tool is that the working surface of the measuring instrument is parallel to the disc-type probe.

[0023] The preferred embodiment of the calibrating device for the tool zero-position measuring instrument of a numerically controlled machine tool is that the measuring instrument is a measured object, and a disc-shaped measuring head of a corresponding diameter is replaced according to the diameter of the measured object.

[0024] A calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool, during calibration:

[0025] 1) Install the zero-position measuring instrument to be measured, place the measuring instrument on the clamping and positioning device of the zero-position measuring instrument, and clamp it firmly so that the working surface of the measuring instrument is parallel to the disc-type probe;

[0026] 2) According to the diameter of the zero-position measuring instrument to be measured, replace the disc-type probe with the corresponding diameter;

[0027] 3) Press the start button to preheat for 15 minutes;

[0028] 4) Turn the hand wheel to zero the zero-position measuring instrument panel;

[0029] 5) Press the reset button to set the display to zero;

[0030] 6) Turn the hand wheel to read the calibration point data of the zero positioning measuring instrument from the display screen.

[0031] Compared with the prior art, the present invention has the following beneficial technical effects:

[0032] The invention solves the problem that the main parameters of the CNC machine tool tool zero position positioning measuring instrument cannot be calibrated due to the large diameter of the measuring head and the excessive measuring force, and greatly improves the detection efficiency and measurement accuracy and reduces the measurement cost.

[0033] 1. The present invention adopts a trapezoidal threaded screw in the moving measuring mechanism of the grating ruler, which solves the problem that the screw in the moving measuring mechanism of the grating ruler has to bear a large pressure during calibration and ordinary fine pitch threads are unable to cope with the problem;

[0034] 2. The present invention adopts a large diameter hand wheel to obtain large torque and easy rotation measurement;

[0035] 3. In order to obtain accurate reference positioning, the clamping and positioning device of the zero-position positioning measuring instrument adopts three-point elastic automatic positioning on the upper part and V-shaped seat locking positioning on the lower part;

[0036] 4. The disc-shaped probe of the present invention adopts a ribbed working surface to solve the calibration error caused by the large contact (Ø46mm) between the probe and the working surface of the instrument being measured during calibration and the grinding of the contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a top view of the measuring instrument calibration device;

[0038] Figure 2 This is the front view of the measuring instrument calibration device;

[0039] Figure 3 It is a schematic diagram of the connection structure between the clamping and positioning device of the measuring instrument and the V-shaped seat and the base;

[0040] Figure 4 Schematic diagram of the disc-type probe structure.

[0041] In the figure: 1 base, 2 measuring instrument clamping positioning device, 3 guide rail, 4 measuring instrument, 5 disc-type probe, 6 measuring rod, 7 grating ruler, 8 reading head, 9 grating moving measuring mechanism, 10 photoelectric receiver, 11 data processing, 12 display screen, 13 cable c, 14 cable a, 15 cable b, 16 handwheel, 17 lead screw, 18 switch, 19 zeroing key, 20 dial, 21 compression spring, 22 positioning head, 23 V-type seat. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-4 The present invention is described in detail, but the protection scope of the present invention is not limited by the accompanying drawings.

[0043] A calibrating device for a tool zero-position measuring instrument for a numerically controlled machine tool, characterized in that it comprises a grating ruler moving measuring mechanism 9, a grating reading mechanism, a measuring instrument clamping and positioning device 2, a guide rail 3, and a base 1;

[0044] The base 1 is provided with a dovetail groove at one end, and the V-shaped seat 23 is arranged in the dovetail groove; the measuring instrument clamping and positioning device 2 is arranged at the upper end of the V-shaped seat 23, and the measuring instrument clamping and positioning device 2 is fixed to the V-shaped seat 23 by screws;

[0045] The grating moving measuring mechanism 9 is arranged corresponding to the measuring instrument clamping and positioning device 2 and is fixed on the base 1 by bolts;

[0046] The guide rail 3 is fixed to both sides of the base 1 by bolts; one end is flush with the end of the base, and the other end is against the grating ruler moving measurement mechanism; the measured part is placed on the guide rail to adjust the position of the measured part;

[0047] The grating ruler moving measuring mechanism 9 includes a housing, a grating ruler 7, a reading head 8, a hand wheel 16, a lead screw 17, a measuring rod 6, and a display screen 12;

[0048] The grating ruler 7 and the reading head 8 are placed in the housing;

[0049] The hand wheel 16 is arranged at the rear end of the grating ruler moving measuring mechanism 9, and is connected to the reading head 8 through the lead screw 17 extending along the rear end of the housing;

[0050] The side rod 6 is arranged at the front end of the grating ruler moving measuring mechanism 9, one end of the side rod extends along the front end of the shell and is connected to the reading head 8, and the other end is connected to the disc-type measuring head 5;

[0051] The display screen 12 is arranged on the outer wall of the housing, a reset button 19 is arranged on one side of the display screen 12, and a switch 18 is arranged at the lower end;

[0052] The reading head 8 is connected to the photoelectric receiver 10 via a cable 13; the photoelectric receiver 10 is connected to the data processor 11 via a cable a14; the data processor 11 is connected to the display screen 12 via a cable b15;

[0053] The measuring instrument clamping and positioning device 2 comprises a positioning seat, a compression spring 21, a positioning head 22, a dial 20 and a measuring instrument 4;

[0054] A mounting circular hole is provided at the center of the positioning seat, and three mounting grooves are provided along the circumference of the mounting circular hole. The mounting grooves are arranged in a concave shape and are evenly distributed;

[0055] The positioning head 22 and the compression spring 21 are arranged in the installation groove, wherein the compression spring 21 supports the positioning head 22, and the clamping claw of the positioning head 22 extends out of the installation groove and is in the installation circular hole. When the measuring instrument 4 is inserted into the measuring instrument clamping and positioning device 2, the positioning head 22 automatically adopts three-point elastic automatic locking and positioning for the measuring instrument 4 under the action of the compression spring 21;

[0056] The dial 20 is arranged at the upper end of the circular hole of the positioning seat.

[0057] The lead screw in the grating ruler moving measuring mechanism adopts a trapezoidal thread screw.

[0058] The hand wheel adopts a large diameter hand wheel to obtain a large torque for easy rotation measurement.

[0059] The disc-type probe adopts a ribbed working surface.

[0060] The working surface of the measuring instrument 4 is parallel to the disc-type measuring head 5 .

[0061] The measuring instrument 4 is a measured object, and according to the diameter of the measured object, the disc-shaped measuring head 5 of the corresponding diameter is replaced.

[0062] A calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool, during calibration:

[0063] 1) Install the zero-position measuring instrument 4 to be measured, place the measuring instrument 4 on the zero-position measuring instrument clamping and positioning device 2, and clamp it firmly so that the working surface of the measuring instrument 4 is parallel to the disc-type probe 5;

[0064] 2) According to the diameter of the zero position measuring instrument 4 to be measured, replace the disc-shaped measuring head 5 with the corresponding diameter;

[0065] 3) Press the start button to preheat for 15 minutes;

[0066] 4) Turn the hand wheel 16 to zero the zero-position measuring instrument panel 20;

[0067] 5) Press the reset key 19 to set the display screen 12 to zero;

[0068] 6) Turn the hand wheel 16 to read the calibration point data of the zero position measuring instrument 4 from the display screen 12.

Claims

1. A calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool, characterized in that: It includes a grating ruler moving measuring mechanism, a grating reading mechanism, a measuring instrument clamping and positioning device, a guide rail, and a base; A dovetail groove is provided at one end of the base, and the V-shaped seat is arranged in the dovetail groove; a measuring instrument clamping and positioning device is arranged at the upper end of the V-shaped seat, and the measuring instrument clamping and positioning device is fixed to the V-shaped seat by screws; The grating moving measuring mechanism is arranged corresponding to the clamping and positioning device of the measuring instrument and is fixed on the base by bolts; The guide rail is fixed on both sides of the base by bolts; one end is flush with the end of the base, and the other end is against the grating ruler moving measurement mechanism; the measured part is placed on the guide rail to adjust the position of the measured part; The grating ruler moving measuring mechanism comprises a housing, a grating ruler, a reading head, a hand wheel, a lead screw, a measuring rod, and a display screen; The grating ruler and the reading head are placed in the housing; The hand wheel is arranged at the rear end of the grating ruler moving measuring mechanism, and is connected to the reading head through a lead screw extending along the rear end of the housing; The side rod is arranged at the front end of the grating ruler moving measuring mechanism, one end of the side rod extends along the front end of the shell and is connected to the reading head, and the other end is connected to the disc-shaped probe; The display screen is arranged on the outer wall of the housing, a reset button is arranged on one side of the display screen, and a switch is arranged at the lower end; The reading head is connected to the photoelectric receiver via a cable; the photoelectric receiver is connected to the data processor via a cable a; The data processor is connected to the display screen via cable b; The measuring instrument clamping and positioning device comprises a positioning seat, a compression spring, a positioning head, a dial and a measuring instrument; A mounting circular hole is provided at the center of the positioning seat, and three mounting grooves are provided along the circumference of the mounting circular hole. The mounting grooves are arranged in a concave shape and are evenly distributed; The positioning head and the compression spring are arranged in the installation groove, wherein the compression spring supports the positioning head, and the clamping claw of the positioning head extends out of the installation groove and is placed in the installation circular hole. When the measuring instrument is inserted into the measuring instrument clamping and positioning device, the positioning head automatically adopts three-point elastic automatic locking and positioning for the measuring instrument under the action of the compression spring; The dial is arranged on the upper end of the circular hole of the positioning seat.

2. The calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool according to claim 1, characterized in that: The lead screw in the grating ruler moving measuring mechanism adopts a trapezoidal thread screw.

3. The calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool according to claim 1, characterized in that: The hand wheel adopts a large diameter hand wheel to obtain a large torque for easy rotation measurement.

4. The calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool according to claim 1, characterized in that: The disc-type probe adopts a ribbed working surface.

5. The calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool according to claim 1, characterized in that: The working surface of the measuring instrument is parallel to the disc-type measuring head.

6. The calibrating device for a tool zero position measuring instrument for a numerically controlled machine tool according to claim 1, characterized in that: The measuring instrument is a measured object, and according to the diameter of the measured object, the disc-shaped measuring head of the corresponding diameter is replaced.

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