Detection tool for detecting verticality of rotation axis of main shaft and moving shaft of machine tool

Abstract

The utility model discloses a testing fixture for detecting the verticality of a spindle rotation axis and a machine tool moving shaft, which comprises a positioning rod, a gauge stand and a dial gauge, the dial gauge is detachably connected with the gauge stand, the gauge stand is fixed at one end of the positioning rod, and the other end of the positioning rod is detachably connected with the dial gauge. The width of the positioning rod is matched with the width of a key groove in the end face of a machine tool spindle, a long-strip-shaped hole is formed in the positioning rod in the length direction, the long-strip-shaped hole is used for installing a plurality of screws, and the screws are used for fixing the positioning rod to the key groove. The detection tool has the advantages of simple structure, small degree of freedom, strong universality, strong operability, high detection efficiency, visual detection data, small detection error and the like. When the detection tool is used, the positioning rod is matched with the key groove in the end face of the machine tool spindle and is locked by the screw, and the angle of the pointer of the dial indicator is finely adjusted, so that the detection can be performed according to the existing detection method, which is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gauge for numerical control machine tool, concretely relates to a gauge for detecting the perpendicularity of the spindle rotation axis and the machine tool moving axis. BACKGROUND

[0002] The perpendicularity of the spindle rotation axis (i.e. the spindle center line) and the machine tool moving axis (including the machine tool X-axis and the machine tool Y-axis) is one of the important parameters for the assembly and maintenance of the numerical control machine tool. Figure 1 As shown in the figure, the existing gauge for detecting the perpendicularity of the spindle rotation axis and the machine tool moving axis includes a magnetic base A, a micrometer stand B and a micrometer C, and the micrometer stand B includes 4 movable joints D and 4 force arms E. Taking the machine tool Y-axis as an example, the method for detecting the perpendicularity of the spindle rotation axis and the machine tool Y-axis using the gauge is as follows: the magnetic base is adsorbed on the spindle end face, a square ruler is erected on the workbench and leveled, and then the spindle is horizontally moved to the workbench, so that the measuring head of the micrometer touches a certain position on the detection surface of one side of the square ruler, and the reading of the micrometer is measured. Then the micrometer is rotated 180° around the spindle, and the spindle is moved along the machine tool Y-axis direction (i.e. up and down), so that the measuring head of the micrometer moves to the same position on the detection surface of the square ruler, and the reading of the micrometer is measured again. The deviation is calculated by dividing the difference between the two readings by twice the distance between the measuring point of the micrometer and the spindle rotation axis. Similarly, the perpendicularity of the spindle rotation axis and the machine tool X-axis can be detected.

[0003] The above-mentioned gauge mainly has the following problems:

[0004] (1) Low data accuracy: in the measurement of the transverse spindle of the head boring machine and the horizontal milling machine, when detecting the perpendicularity of the spindle rotation axis and the machine tool moving axis, the gauge has many movable joints, long force arms and insufficient rigidity, which is greatly affected by gravity, resulting in a certain deviation between the actual detection value and the true detection value, and affecting the accuracy of the machine tool.

[0005] (2) Low detection efficiency: when detecting, not only the multiple movable joints and multiple force arms on the gauge need to be adjusted, but also the distance between the measuring point of the micrometer and the spindle rotation axis needs to be measured. Since the micrometer stand is long and has a large degree of freedom, the measurement of the distance between the measuring point of the micrometer and the spindle rotation axis is difficult, which affects the assembly progress of the machine tool. UTILITY MODEL CONTENTS

[0006] The utility model solves the technical problem of the prior art, and provides a gauge for detecting the perpendicularity of the spindle rotation axis and the machine tool moving axis, which has the advantages of simple structure, small degree of freedom, strong universality, strong operability, high detection efficiency, intuitive detection data, small detection error and the like.

[0007] The utility model discloses a technical scheme that solves the above technical problem is adopted: a kind of gauge for detecting the perpendicularity of main shaft rotating axis and machine tool moving shaft, including positioning rod, table seat and dial gauge, the dial gauge with the table seat is detachably connected, the table seat is fixed in the positioning rod one end, the width of the positioning rod is adapted to the width of the keyway of machine tool main shaft end face, the length direction of the positioning rod is provided with long hole, the long hole is used to install several screws, and the several screws are used to fix the positioning rod in the keyway.

[0008] The utility model discloses gauge has the advantages of strong universality, strong operability, high detection efficiency, intuitive detection data, small detection error, and the like, and is specifically introduced as follows:

[0009] 1) strong universality: the positioning rod of the utility model discloses gauge is positioned by the keyway of the machine tool main shaft end face, and the positioning rod is adapted to most existing main shafts, and the position is adjusted conveniently, so the utility model discloses gauge is strong in universality; the detection principle of the utility model discloses gauge for detecting the perpendicularity of main shaft rotating axis and machine tool moving shaft is consistent with the detection method of the existing gauge, and the perpendicularity of all detection objects applicable to the existing gauge can be detected;

[0010] 2) strong operability: when the utility model discloses gauge is used, only need to cooperate the positioning rod with the keyway of the machine tool main shaft end face and lock by screw, and the needle angle of dial gauge is adjusted slightly, so that detection can be carried out according to the existing detection method, which is convenient and fast;

[0011] 3) high detection efficiency: the structure of the utility model discloses gauge is simple, and the degree of freedom is small, so the distance between the measuring point of dial gauge and main shaft rotating axis can be measured conveniently by using ordinary tools such as tape measure;

[0012] 4) intuitive detection data: under the condition that the distance between the measuring point of dial gauge and main shaft rotating axis is determined, only need to record the reading of dial gauge before and after 180 ° rotation of main shaft and carry out difference comparison, and then the data of the perpendicularity of main shaft rotating axis and machine tool moving shaft can be obtained by dividing the difference by twice the distance between the measuring point of dial gauge and main shaft rotating axis;

[0013] 5) small detection error: the utility model discloses gauge has short force arm and few movable joints, is hardly affected by gravity, and the positioning rod is fixed rigidly in the keyway of the machine tool main shaft end face, so the stability is stronger, and the detection error of perpendicularity is small.

[0014] Preferably, the table seat includes a clamping block and a connecting rod, one end of the connecting rod is fixed perpendicularly to the positioning rod, the other end of the connecting rod is rotatably connected to the clamping block, and the clamping block is used to clamp the mounting rod at the top of the dial gauge.

[0015] As a further optimization, one end of the connecting rod is screwed to the positioning rod and fastened by a spring washer to ensure the connecting effect of the connecting rod and the positioning rod and prevent loosening.

[0016] As a further optimization, the clamping block is provided with a positioning hole and a positioning groove, the positioning hole and the positioning groove are respectively up and down through, the positioning groove is connected with the positioning hole and straight through one side of the clamping block, a locking cap is installed on the outer wall of the clamping block, the positioning hole is used for inserting the mounting rod, and the locking cap is used for adjusting the width of the positioning groove to clamp or loosen the mounting rod. The positioning hole, the positioning groove and the locking cap are simple in structure and facilitate the quick mechanical clamping and loosening of the dial gauge on the gauge seat.

[0017] Compared with the prior art, the utility model has the advantages that the utility model is simple in structure, small in degree of freedom, strong in universality and operability, high in detection efficiency, intuitive in detection data, small in detection error and the like. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an appearance view of the detection tool for detecting the perpendicularity between the main shaft rotating axis and the machine tool moving shaft;

[0019] Figure 2 It is an appearance view of the detection tool for detecting the perpendicularity between the main shaft rotating axis and the machine tool moving shaft in embodiment 1;

[0020] Figure 3 It is a front view of the detection tool for detecting the perpendicularity between the main shaft rotating axis and the machine tool moving shaft in embodiment 1;

[0021] Figure 4 It is an appearance view of the gauge seat in embodiment 1;

[0022] Figure 5 It is a side view of the gauge seat in embodiment 1;

[0023] Figure 6 It is a top view of the gauge seat in embodiment 1;

[0024] Figure 7 It is a schematic view of the use state of the detection tool in embodiment 1;

[0025] Figures 2-7 The specific reference signs are as follows:

[0026] 1-positioning rod, 11-long hole, 12-screw, 2-table seat, 21-clamping block, 22-connecting rod, 23-spring washer, 24-positioning hole, 25-positioning groove, 26-locking cap, 3-micrometer, 31-mounting rod, 32-measuring head, 4-main shaft, 41-key groove, 5-workbench, 6-square ruler, 61-detection surface. DETAILED DESCRIPTION

[0027] The utility model will be described in further detail below in combination with the drawings. The structures or components not specified in the utility model adopt the conventional technical means in the field.

[0028] Example 1: a gauge for detecting the perpendicularity of the rotation axis of the main shaft and the moving shaft of the machine tool, as shown in Figure 2 and Figure 3 , comprising a positioning rod 1, a table seat 2 and a micrometer 3, the micrometer 3 is detachably connected with the table seat 2, the table seat 2 is fixed to one end of the positioning rod 1, the width of the positioning rod 1 is adapted to the width of the key groove 41 of the end surface of the main shaft 4 of the machine tool, the length direction of the positioning rod 1 is provided with a long hole 11, the long hole 11 is used for mounting two screws 12, and the two screws 12 are used for fixing the positioning rod 1 to the key groove 41.

[0029] In example 1, as shown in Figures 4-6 , the table seat 2 comprises a clamping block 21 and a connecting rod 22, one end of the connecting rod 22 is threadedly connected with the positioning rod 1 and is fastened through a spring washer 23, the other end of the connecting rod 22 is rotationally connected with the clamping block 21, the clamping block 21 is used for clamping the mounting rod 31 at the top of the micrometer 3, specifically, the clamping block 21 is provided with a positioning hole 24 and a positioning groove 25, the positioning hole 24 and the positioning groove 25 are respectively up and down through, the positioning groove 25 is connected with the positioning hole 24 and straight through one side of the clamping block 21, the outer side wall of the clamping block 21 is provided with a locking cap 26, the positioning hole 24 is used for inserting the mounting rod 31, and the locking cap 26 is used for adjusting the width of the positioning groove 25 to clamp or loosen the mounting rod 31.

[0030] Taking the detection of the perpendicularity of the rotation axis of the main shaft and the Y-axis of the machine tool as an example, the use method of the above gauge is as follows: Figure 7As shown, a square gauge 6 is installed on the worktable 5. First, the positioning rod 1 is placed into the keyway 41 on the end face of the machine tool spindle 4. The position of the positioning rod 1 is adjusted so that the distance between the measuring point of the dial indicator 3 and the axis of rotation of the spindle meets the testing requirements. Then, the two screws 12 are tightened. Next, the spindle 4 is moved horizontally towards the worktable 5 so that the spindle 4 is close to the square gauge 6. Without rotating the spindle 4, the spindle 4 is moved up and down so that the spindle 4 moves along the Y-axis of the machine tool. Then, the square gauge 6 is adjusted so that the testing surface 61 on one side of the square gauge 6 is parallel to the Y-axis of the machine tool. Then, the spindle 4 is moved horizontally so that the probe 32 of the dial indicator 3 touches the detection surface 61 of the square gauge 6, and the reading of the dial indicator 3 is measured. Then, the spindle 4 is rotated 180° so that the spindle 4 is moved along the Y-axis of the machine tool until the probe 32 of the dial indicator 3 touches the same position on the detection surface 61 of the square gauge 6, and the reading of the dial indicator 3 is measured again. The difference between the two readings is divided by twice the distance between the measuring point of the dial indicator 3 and the axis of rotation of the spindle to obtain the deviation. This deviation is the perpendicularity of the measured axis of rotation of the spindle to the Y-axis of the machine tool.

[0031] Using the same boring machine spindle 4 as the inspection object, the following methods were adopted: Figure 1 The existing fixture shown and the fixture of Example 1 were used to test the perpendicularity of the spindle rotation axis to the Y-axis of the boring machine. The test results are as follows:

[0032] Existing fixture: The adjustment time for the entire inspection process is 13 minutes, the inspection time is 2 minutes, and the total inspection time is 15 minutes. Five sets of perpendicularity data were measured at the same position: ① 0.008; ② 0.009; ③ 0.007; ④ 0.007; ⑤ 0.006.

[0033] The fixture in Example 1: The adjustment time during the entire testing process is 8 minutes, the testing time is 2 minutes, and the total testing time is 10 minutes. Five sets of perpendicularity data were measured at the same position: ① 0.007; ② 0.007; ③ 0.008; ④ 0.008; ⑤ 0.008.

[0034] Comparison results: Compared with existing inspection tools, the inspection tool of Example 1 has smaller detection error, better stability of detection data, and takes less time for the detection process, resulting in higher detection efficiency.

Claims

1. A gauge for detecting the perpendicularity of the spindle rotation axis to the machine tool movement axis, characterized in that, The device includes a positioning rod, a dial indicator base, and a dial indicator. The dial indicator is detachably connected to the dial indicator base, and the dial indicator base is fixed to one end of the positioning rod. The width of the positioning rod is adapted to the width of the keyway on the end face of the machine tool spindle. The positioning rod has an elongated hole along its length for mounting a number of screws, which are used to fix the positioning rod to the keyway.

2. The inspection fixture for detecting the perpendicularity between the spindle rotation axis and the machine tool movement axis according to claim 1, characterized in that, The dial indicator base includes a clamping block and a connecting rod. One end of the connecting rod is vertically fixed to the positioning rod, and the other end of the connecting rod is rotatably connected to the clamping block. The clamping block is used to clamp the mounting rod at the top of the dial indicator.

3. A gauge for detecting the perpendicularity between the spindle rotation axis and the machine tool movement axis according to claim 2, characterized in that, One end of the connecting rod is threaded to the positioning rod and secured by a spring washer.

4. A gauge for detecting the perpendicularity between the spindle rotation axis and the machine tool movement axis according to claim 2, characterized in that, The clamping block has a positioning hole and a positioning groove, which are connected vertically. The positioning groove is connected to the positioning hole and extends to one side of the clamping block. A locking cap is installed on the outer wall of the clamping block. The positioning hole is used to insert the mounting rod, and the locking cap is used to adjust the width of the positioning groove to clamp or loosen the mounting rod.

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