CN206019607U - A kind of line slideway accuracy detecting device - Google Patents

Abstract

The utility model discloses a linear guide rail accuracy detection device. The device includes a bed, and a group of parallel linear guide rail pairs are respectively arranged on the left and right sides of the bed. device, a disc measuring frame is fixedly installed in the middle of the bridge frame, and seven non-contact displacement sensors are symmetrically arranged on the measuring frame, which are respectively aligned with the center of the top surface of the tested guide rail, the raceways on the left and right sides of the tested guide rail, and the measured The reference side of the guide rail, the non-reference side of the tested guide rail, the left and right sides of the bottom of the tested guide rail in the width direction, the bottom of the bed is provided with a linear guide pair, and three identical guide rails are fixed above the guide rail pair, which can move independently along the length of the bed. The Z-axis linear slide table is provided with a bracket for dragging the tested guide rail on the slide table. The measuring device has a simple structure, and the guide rail does not need to be fixed by bolts, which not only reduces the manufacturing cost, but also improves the measuring efficiency.

Description

A linear guide rail accuracy detection device

technical field

The utility model relates to the technical field of measurement, in particular to a linear guide rail precision measuring device.

Background technique

At present, the accuracy measurement of rolling linear guides is mostly carried out by manual measurement or contact sensors. When manually measuring the parallelism of the guide rail raceways, the guide rail is clamped on the fixture of the measuring flat plate, and the table base is connected to the reference surface of the guide rail side and the installation plane of the guide rail. Align, and align the meter head with the raceway surface of the guide rail, and then move the meter base to measure. The difference between the measured maximum and minimum values is the parallelism error of the guide rail raceway. The quality requirements of the personnel are high and the repeatability of the measurement results is poor; the Chinese Utility Model Publication No. CN103438839A, the name is: a linear guide rail precision automatic measurement device and its measurement method, the patent introduces the use of non-contact sensors to measure the guide rail accuracy, the sensor is in Pneumatic components are added to the contact sensor so that it does not touch the measured object during the non-working period. The standard slider equipped with this sensor moves at a certain interval during measurement to realize the control of the height and parallelism of the measured guide rail. Measurement, this method needs to make corresponding standard guide rails and standard sliders when measuring different types of guide rails, which increases economic costs and maintenance costs.

To sum up, the various guideway accuracy measuring instruments currently used cover few measurement items, especially for the measurement of raceway-related accuracy, and the measurement efficiency, measurement accuracy, and repeatability need to be improved.

Utility model content

The purpose of the utility model is to provide a device for measuring the accuracy of rolling linear guide rails in a non-contact manner, so as to improve the measurement efficiency.

The technical solution to realize the purpose of this utility model is: a linear guide rail accuracy detection device, the device includes a bed, a set of parallel linear guide rail pairs are arranged on the left and right sides of the bed, and the bridge frame is fixed on the guide rail pair, and the left side of the bridge frame There is a driving device under the side, and a disc measuring frame is fixedly installed in the middle of the bridge frame. The first non-contact displacement sensor, the second non-contact displacement sensor, the third non-contact displacement sensor, and the fourth non-contact displacement sensor are installed on the measurement frame. The non-contact displacement sensor, the fifth non-contact displacement sensor, the sixth non-contact displacement sensor, and the seventh non-contact displacement sensor are respectively aligned with the center of the top surface of the tested guide rail, the raceways on the left and right sides of the tested guide rail, The reference side of the tested guide rail, the non-reference side of the tested guide rail, and the left and right sides in the width direction of the bottom surface of the tested guide rail. , the first Z-axis linear slide, the second Z-axis linear slide, and the third Z-axis linear slide are fixed above the guide rail pair. The three Z-axis linear slides are identical and can be independently moved along the length of the bed Moving, the first Z-axis linear slide, the second Z-axis linear slide, and the third Z-axis linear slide are respectively provided with a first bracket, a second bracket, and a third bracket for dragging the tested guide rail. , The first end stopper and the third end stopper are arranged on the first bracket and the third bracket on the first Z-axis linear slide table and the third Z-axis linear slide table on both sides of the bed.

The first non-contact displacement sensor, the second non-contact displacement sensor, the third non-contact displacement sensor, the fourth non-contact displacement sensor, the fifth non-contact displacement sensor, the sixth non-contact displacement sensor , The seventh non-contact displacement sensor is a pneumatic displacement sensor.

The second non-contact displacement sensor and the third non-contact displacement sensor aligned with the raceways on the left and right sides of the tested guide rail form an included angle of 45° with the horizontal plane.

For the first Z-axis linear slide, the second Z-axis linear slide, and the third Z-axis linear slide, each slide is provided with two sets of driving devices, one of which drives and is fixedly connected to the first The first bracket, the second bracket, and the third bracket on the Z-axis linear slide table, the second Z-axis linear slide table, and the third Z-axis linear slide table move up and down, and another set of driving devices drives the first Z-axis The linear slide table, the second Z-axis linear slide table, and the third Z-axis linear slide table move along the length direction of the bed as a whole.

A measurement method using the above-mentioned linear guide rail accuracy detection device, specifically comprising the following steps:

Step 1. Set the positions of the first Z-axis linear slide, the second Z-axis linear slide, and the third Z-axis linear slide according to the length of the tested guide rail, and place the tested guide rail on the first bracket and the second bracket , On the third bracket, make the two ends of the tested guide rail against the first end stopper and the third end stopper, and adjust the position of the disc measuring frame and the tested guide rail through the synchronous movement of the three sliding tables in the vertical direction, so that The 7 non-contact displacement sensors on the disc measuring frame are respectively aligned with the center of the top surface of the guide rail, the raceways on the left and right sides above the guide rail, the reference side of the guide rail, the non-reference side of the guide rail, and the left and right sides of the width direction of the bottom surface of the guide rail.

Step 2. Start seven non-contact displacement sensors, and set the sensor readings at the initial position to zero.

Step 3. Start the driving device on the bridge frame to drive the bridge frame, the disc measuring frame and the 7 non-contact displacement sensors on it to move along the direction of the measured guide rail. At this time, the 7 non-contact displacement sensors measure and collect the measured value Ai , Bi, Ci, Di, Ei, Fi, Gi, when passing the slide table in the middle, the carriage moves downwards in the vertical direction, giving way to the disc measuring frame.

Step 4. Calculate and evaluate the height, width variation and parallelism of the measured guide rail through the above measuring frame.

Compared with the prior art, the utility model has the remarkable advantages that the non-contact displacement sensor adopted by the measuring device of the utility model has good measurement stability and high precision, and is less affected by vibration than the contact displacement sensor , and the structure of the test bench is relatively simple; compared with the traditional manual measurement method, the tedious clamping and platform maintenance work is eliminated, the measurement efficiency is greatly improved, and the labor intensity and learning time of the operator are reduced. ; Due to the use of the relative measurement principle, the cost of high-cost, high-precision detection platform is eliminated, and the processing cost of the test bench is reduced.

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the linear guide rail precision measuring device.

Fig. 2 is a structural schematic diagram of the slide table.

Figure 3 is the installation layout diagram of the non-contact displacement sensor.

detailed description

In combination with Fig. 1, Fig. 2 and Fig. 3, a linear guide rail accuracy detection device of the present invention includes a bed 1, and a set of parallel linear guide rail pairs 19 are respectively arranged on the left and right sides of the bed 1, and the bridge frame 3 is fixedly connected to two sets of On the top of the linear guide rail pair, a driving device is arranged below the bridge frame 3, and a disc measuring frame 2 is fixedly installed in the middle of the bridge frame 3, and a first non-contact displacement sensor 12 and a second non-contact displacement sensor are arranged on the measuring frame 2. 13. The third non-contact displacement sensor 14, the fourth non-contact displacement sensor 15, the fifth non-contact displacement sensor 16, the sixth non-contact displacement sensor 17 and the seventh non-contact displacement sensor 18, the above seven The non-contact displacement sensor is respectively aligned with the center of the top surface of the tested guide rail, the raceways on the left and right sides of the tested guide rail, the reference side of the tested guide rail, the non-reference side of the tested guide rail, and the left and right sides of the bottom surface of the tested guide rail in the width direction;

The bottom of the bed 1 is provided with a linear guide rail pair 8, and the top of the guide rail pair 8 is fixedly connected with the first Z-axis linear slide table I, the second Z-axis linear slide table II, and the third Z-axis linear slide table III. The two-axis linear slides are identical and can move independently along the length of the bed. The second Z-axis linear slide II is located between the first Z-axis linear slide I and the third Z-axis linear slide III. The first Z-axis linear slide I, second Z-axis linear slide II, and third Z-axis linear slide III are respectively provided with the first bracket 21, the second bracket 22, and the third bracket 23 for dragging the tested guide rail. ,

A first end stop 24 is provided on the first bracket 21 on the first Z-axis linear slide I, and a third end stop 25 is provided on the third bracket 23 on the third Z-axis linear slide III.

The first non-contact displacement sensor 12, the second non-contact displacement sensor 13, the third non-contact displacement sensor 14, the fourth non-contact displacement sensor 15, the fifth non-contact displacement sensor 16, the sixth non-contact displacement sensor Both the contact displacement sensor 17 and the seventh non-contact displacement sensor 18 are pneumatic displacement sensors.

The second non-contact displacement sensor 13 and the third non-contact displacement sensor 14 aligned with the raceways on the left and right sides of the tested guide rail form an included angle of 45° with the horizontal plane.

In the first Z-axis linear slide I, the second Z-axis linear slide II, and the third Z-axis linear slide III, each slide is provided with two sets of driving devices, one of which drives the corresponding The bracket moves up and down, and another set of driving device drives the corresponding Z-axis linear sliding table to move along the length of the bed as a whole.

A measurement method based on the above-mentioned device, specifically comprising the following steps:

Step 1. Set the positions of the first Z-axis linear slide I, the second Z-axis linear slide II, and the third Z-axis linear slide III according to the length of the tested guide rail, and place the tested guide rail on the first bracket 21, On the second bracket 22 and the third bracket 23, make the two ends of the measured guide rail against the first end stopper 24 and the third end stopper 25, and adjust the disc measurement through the synchronous movement of the three brackets in the vertical direction. Frame 2 and the position of the measured guide rail, so that the 7 non-contact displacement sensors on the disc measurement frame 2 are respectively aligned with the center of the top surface of the guide rail, the raceways on the left and right sides above the guide rail, the reference side of the guide rail, the non-reference side of the guide rail, and the bottom surface of the guide rail The left and right sides in the width direction;

Step 2, start 7 non-contact displacement sensors, and set the sensor readings at the initial position to zero;

Step 3, start the driving device on the bridge frame 3 to drive the bridge frame 3, the disc measuring frame 2 and the 7 non-contact displacement sensors on it to move along the length direction of the measured guide rail. At this time, the 7 non-contact displacement sensors measure. Collect the measurement values Ai, Bi, Ci, Di, Ei, Fi, Gi, when passing through the sliding platform II in the middle, the bracket 22 moves downward in the vertical direction, giving way to the disc measuring frame 2;

Step 4. Calculate the height, width variation and parallelism of the measured guide rail through the above measuring frame.

From the measured values Ai, Bi, Ci, Di, Ei, Fi, Gi (i=1,2,3,...n) obtained above, the height variation, width variation, and The parallelism of the raceway relative to the bottom surface of the guide rail, and the parallelism of the raceway on the guide rail relative to the side reference of the guide rail, are calculated as follows:

The height change of the measured guide rail at a certain measurement position relative to the initial position is: Hi=Ai+0.5(Fi+Gi);

The width change of the measured guide rail at a certain measurement position relative to the initial position is: Wi=Di+Ei;

The amount of change of the measured guide rail at a certain measurement position relative to the left raceway at the initial position relative to the bottom surface of the guide rail is: LDi=0.5(Ci+Fi+Gi);

The amount of change of the measured guide rail at a certain measurement position relative to the right raceway of the initial position relative to the bottom surface of the guide rail is: RDi=0.5(Di+Fi+Gi);

The amount of change of the tested guide rail at a certain measurement position relative to the left raceway at the initial position relative to the side surface reference of the guide rail is: LSi=-0.5Ci+Di;

The variation of the measured guide rail at a certain measurement position relative to the left raceway at the initial position relative to the side surface reference of the guide rail is: RSi=-0.5Ci+Ei;

The height, width variation and parallelism error of the measured guide rail can be calculated according to the measured values at each position.

Take max(Hi)-min(Hi) as the height variation of the measured guide rail;

Take max(LDi)-min(LDi) as the parallelism of the upper raceway on the left side of the tested guide rail relative to the reference of the bottom surface of the guide rail;

Take max(RDi)-min(RDi) as the parallelism of the upper raceway on the right side of the tested guide rail relative to the reference of the bottom surface of the guide rail;

Take max(LSi)-min(LSi) as the parallelism of the upper raceway on the left side of the tested guide rail relative to the side reference of the guide rail;

Take max(RSi)-min(RSi) as the parallelism of the upper raceway on the right side of the tested guide rail relative to the side reference of the guide rail;

It can be seen from the above that the device of the present invention can test the dynamic measurement of linear guide rail accuracy, the test efficiency is high, and the measurement data is true and reliable.

Claims (4)

1. A linear guide rail accuracy detection device, characterized in that it includes a bed [1], a set of parallel linear guide rail pairs [19] are respectively arranged on the left and right sides of the bed [1], and the bridge [3] is fixedly connected to the two groups Above the pair of linear guide rails, a driving device is set under the bridge [3], a disc measuring frame [2] is fixedly installed in the middle of the bridge [3], and a first non-contact displacement sensor is set on the measuring frame [2] [ 12], the second non-contact displacement sensor [13], the third non-contact displacement sensor [14], the fourth non-contact displacement sensor [15], the fifth non-contact displacement sensor [16], the sixth non-contact displacement sensor The contact displacement sensor [17] and the seventh non-contact displacement sensor [18]. The reference side, the non-reference side of the tested guide rail, the left and right sides in the width direction of the bottom surface of the tested guide rail; The bottom of the bed [1] is provided with a linear guide rail pair [8], and the first Z-axis linear slide table [I], the second Z-axis linear slide table [II] and the third Z-axis slide table [II] are fixedly connected above the guide rail pair [8]. axis linear slide [Ⅲ], the above three Z-axis linear slides are identical and can move independently along the length of the bed, the second Z-axis linear slide [Ⅱ] is located on the first Z-axis linear slide [Ⅰ] and the third Z-axis linear slide [Ⅲ], the first Z-axis linear slide [I], the second Z-axis linear slide [II], and the third Z-axis linear slide [Ⅲ] respectively The first bracket [21], the second bracket [22], the third bracket [23] of dragging the tested guide rail are set, Set the first end stopper [24] on the first bracket [21] on the first Z-axis linear slide [Ⅰ], and set it on the third bracket [23] on the third Z-axis linear slide [Ⅲ] Third end stop [25]. 2. The linear guide rail accuracy detection device according to claim 1, characterized in that, the first non-contact displacement sensor [12], the second non-contact displacement sensor [13], the third non-contact displacement sensor The sensor [14], the fourth non-contact displacement sensor [15], the fifth non-contact displacement sensor [16], the sixth non-contact displacement sensor [17], and the seventh non-contact displacement sensor [18] are Pneumatic displacement sensor. 3. The linear guide rail accuracy detection device according to claim 1, characterized in that, the second non-contact displacement sensor [13] and the third non-contact displacement sensor [ 14] form an angle of 45° with the horizontal plane. 4. The linear guide rail accuracy detection device according to claim 1, characterized in that the first Z-axis linear slide [I], the second Z-axis linear slide [II], and the third Z-axis linear slide In [Ⅲ], two sets of driving devices are installed on each sliding table, one of which drives the corresponding bracket to move up and down, and the other driving device drives the corresponding Z-axis linear sliding table to move along the length of the bed .