Testing device for transverse feeding mechanism of planogrinder

Abstract

The utility model discloses a testing device for a transverse feeding mechanism of a planogrinder, which comprises a base, upright posts, a cross beam and a carriage, two ends of the cross beam are horizontally fixed above the base through the upright posts, the carriage is slidably connected to the side surface of the cross beam, the transverse feeding mechanism comprises a screw rod, a ball nut and a servo motor, and the screw rod is horizontally and rotatably mounted on the side surface of the cross beam. The ball nut is fixedly mounted on the carriage and is matched with the screw rod, the servo motor is fixedly mounted at the end part of the cross beam and is in transmission connection with the screw rod, the counterweight part is mounted at the lower side of the carriage and can adjust the weight, the encoder is mounted at the end part of the screw rod and is used for detecting the rotation angle of the screw rod, and the grating ruler is used for measuring the rotation angle of the screw rod. The grating ruler is horizontally installed on the cross beam and used for detecting the horizontal displacement of the carriage. According to the testing device for the transverse feeding mechanism of the planogrinder, deformation of the cross beam under the influence of gravity is considered, the test is closer to the actual working environment of the cross beam, and the test result is more accurate.

Description

Technical Field

[0001] This utility model relates to the technical field of gantry grinding machine testing devices, and in particular to a testing device for the transverse feed mechanism of a gantry grinding machine. Background Technology

[0002] As shown in the patent application number CN200910307949.5, an existing gantry grinding machine includes a bed, columns on the left and right sides of the bed, a crossbeam horizontally fixed to the upper end of the columns, a slide slidably connected to the crossbeam, a grinding head mounted on the slide, and a transverse feed mechanism for driving the slide to move laterally along the crossbeam. The existing transverse feed mechanism generally includes a lead screw, a ball nut, and a servo motor. The ball nut is fixedly mounted on the slide, the lead screw is mounted parallel to the crossbeam and cooperates with the ball nut, and the servo motor drives the lead screw to rotate, thereby driving the slide to move laterally.

[0003] In existing transverse feed mechanisms, wear between the lead screw and the ball nut during operation causes changes in the geometric parameters of the raceway within the ball nut, thus affecting the driving accuracy of the transverse feed mechanism. Therefore, it is necessary to use a testing device to test the wear resistance of the transverse feed mechanism.

[0004] The crossbeam of a gantry grinding machine is large in size and weight, and is also affected by the weight of the slide and grinding head. In actual operation, the crossbeam will undergo a certain deformation, which in turn will cause the lead screw on the crossbeam to deform to a certain extent. Although it is not easy to detect, this deformation will affect the wear resistance of the transverse feed mechanism. While some existing test devices for testing ball screws can also test the wear resistance of the transverse feed mechanism, they do not take into account the deformation of the crossbeam under the influence of gravity, resulting in inaccurate test results. Utility Model Content

[0005] To address the shortcomings of existing testing devices that do not consider the deformation of the crossbeam under gravity, leading to inaccurate test results, this invention proposes a testing device for the transverse feed mechanism of a gantry grinder. This device considers the deformation of the crossbeam under gravity, making the test more closely resemble the actual working environment of the crossbeam and resulting in more accurate test results.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A test device for the transverse feed mechanism of a gantry grinding machine includes a base, columns, a crossbeam, and a slide. The two ends of the crossbeam are horizontally fixed above the base by the columns. The slide is slidably connected to the side of the crossbeam. The transverse feed mechanism includes a lead screw, a ball nut, and a servo motor. The lead screw is horizontally rotatably mounted on the side of the crossbeam. The ball nut is fixedly mounted on the slide and cooperates with the lead screw. The servo motor is fixedly mounted at the end of the crossbeam and is connected to the lead screw for transmission. The test device also includes a counterweight, an encoder, and a grating ruler. The counterweight is mounted on the underside of the slide and its weight is adjustable. The encoder is mounted at the end of the lead screw to detect the rotation angle of the lead screw. The grating ruler is horizontally mounted on the crossbeam to detect the horizontal displacement of the slide.

[0008] With the above settings, the crossbeam, slide, and counterweight are suspended in the air. The counterweight simulates the grinding head of a traditional gantry grinder, and the stress on the crossbeam is closer to the actual working environment. The deformation of the crossbeam under the influence of gravity was considered when testing the transverse feed mechanism, and the test results are more accurate.

[0009] Furthermore, the test device also includes an adjustment mechanism set on the base. There are two columns, one of which is fixedly connected to the base at its lower end, and the other column can move horizontally under the action of the adjustment mechanism. The crossbeam is horizontally fixedly connected between the upper ends of the two columns.

[0010] The above settings allow the test apparatus to be fitted with crossbeams of different lengths.

[0011] Furthermore, the adjustment mechanism includes a sliding seat, a first screw, and an adjustment motor. The sliding seat is slidably connected to the upper side of the base, the lower end of the column is fixedly connected to the upper side of the sliding seat, the first screw is rotatably connected to the upper side of the base and threadedly connected to the sliding seat, and the adjustment motor is used to drive the first screw to rotate.

[0012] With the above settings, the adjustment mechanism can drive the column to move through the adjustment motor and the first screw, and the adjustment mechanism has a self-locking function. After the adjustment motor stops moving, the column position is locked.

[0013] Furthermore, flanges are welded to both ends of the crossbeam, and the flanges are fixed to the upper end of the column by bolts. The test device also includes a support plate fixedly connected to the side of the column, and the support plate abuts against the lower side of the flange.

[0014] The above settings facilitate the installation of the crossbeam.

[0015] Furthermore, the counterweight includes a connecting assembly, a bucket, and a valve. The upper side of the bucket is connected to the lower side of the slide via the connecting assembly, and the valve is located on the lower side of the bucket.

[0016] The above settings allow for easy adjustment of the counterweight's weight by adding or removing water from the bucket.

[0017] Furthermore, the counterweight also includes a piston and a guide column. The piston is slidably and sealed inside the water tank, and the guide column passes vertically through the piston and is slidably and sealed with the piston. The lower end of the guide column is fixedly connected to the bottom of the water tank.

[0018] The above settings prevent the water in the bucket from sloshing when the trolley moves.

[0019] Furthermore, the connecting assembly includes a second screw, an upper nut, a lower nut, a connecting plate, and connecting rods. Multiple second screws are provided, with the upper end of each screw welded to the lower side of the slide plate. The connecting plate has an elongated hole through which the second screw passes. The upper nut is threadedly connected to the second screw and abuts against the upper side of the connecting plate. The lower nut is threadedly connected to the second screw and abuts against the lower side of the connecting plate. The connecting plate is horizontally fixed above the bucket via multiple connecting rods.

[0020] With the above setup, the water bucket is fixed to the underside of the slide plate via a connecting rod, connecting plate, lower nut, upper nut, and second screw; after loosening the upper nut, the center of gravity of the counterweight can be adjusted back and forth.

[0021] Furthermore, the grating ruler includes a ruler section and a measuring head. The ruler section is horizontally mounted on the upper side of the crossbeam, and the measuring head is fixedly mounted on the upper side of the slide plate, opposite to the ruler section. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the test apparatus for an embodiment.

[0023] Figure 2 for Figure 1 Enlarged view of point A.

[0024] Figure 3 This is a front view of the test apparatus for an embodiment.

[0025] Figure 4 This is a cross-sectional view of the bucket used in this embodiment. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] like Figures 1 to 4As shown, a test device for the transverse feed mechanism of a gantry grinding machine includes a base 3, a column 4, a crossbeam 5, and a slide 6. The two ends of the crossbeam 5 are horizontally fixed above the base 3 by the column 4. The slide 6 is slidably connected to the side of the crossbeam 5. The transverse feed mechanism includes a lead screw 7, a ball nut 8, and a servo motor 9. The lead screw 7 is horizontally rotatably mounted on the side of the crossbeam 5. The ball nut 8 is fixedly mounted on the slide 6 and cooperates with the lead screw 7. The servo motor 9 is fixedly mounted on the end of the crossbeam 5 and is connected to the lead screw 7 for transmission. The test device also includes a counterweight 10, an encoder 11, and a grating ruler 12. The counterweight 10 is mounted on the lower side of the slide 6 and its weight is adjustable. The encoder 11 is mounted on the end of the lead screw 7 and is used to detect the rotation angle of the lead screw 7. The grating ruler 12 is horizontally mounted on the crossbeam 5 and is used to detect the horizontal displacement of the slide 6.

[0028] With the above settings, the crossbeam 5, slide 6 and counterweight 10 are suspended in the air. The counterweight 10 simulates the grinding head of a traditional gantry grinder. The stress on the crossbeam 5 is closer to the actual working environment. When testing the transverse feed mechanism, the deformation of the crossbeam 5 under the influence of gravity was taken into account, and the test results are more accurate.

[0029] The slide plate 6 and the transverse feed mechanism of the test device in this application are pre-installed on the crossbeam 5. The parameters of the slide plate 6 are consistent with those of the slide plate 6 of the gantry grinder to be tested. The parameters of the crossbeam 5 are also consistent with those of the crossbeam 5 of the gantry grinder to be tested. When the test device is in use, the crossbeam 5 is lifted by a crane. One end of the crossbeam 5 is installed on the upper end of one of the columns 4, and the other end of the crossbeam 5 is installed on the upper end of the other column 4. The counterweight 10 is installed on the lower side of the slide plate 6, and the weight of the counterweight 10 is set to be consistent with the weight of the grinding head of the gantry grinder to be tested, simulating the grinding head. The position of the slide plate 6 at this time is measured by the grating ruler 12 as the first position a1, and the angle of the lead screw 7 at this time is measured by the encoder 11 as the first angle b1. The servo motor 9 drives the lead screw 7 to rotate, and the lead screw 7 rotates relative to the ball nut 8. After the slide plate 6 moves back and forth on the crossbeam 5 multiple times, the servo motor 9 stops moving, and the grating ruler 12 measures the position of the slide plate 6 at this time as the second position a2. The encoder 11 measures the angle of the lead screw 7 as the second angle b2 at this time, and calculates the wear amount of the transverse feeding mechanism at this time as a2-a1-(b2-b1) / 2π*l, where l is the lead of the lead screw 7, a2-a1 is the moving distance of the slide, (b2-b1) / 2π is the number of revolutions of the lead screw, and (b2-b1) / 2π*l is the theoretical distance that the lead screw can drive the slide after a certain number of revolutions. When the transverse feeding mechanism is not worn, the moving distance of the slide 6 is equal to the distance driven by the lead screw 7 to the slide 6, that is, a2-a1=(b2-b1) / 2π*l, that is, the wear amount is 0. However, when there is wear in the transverse feeding mechanism, that is, when the raceway of the ball nut 8 is worn, the wear amount is no longer equal to 0. The more severe the wear, the greater the wear amount. When the wear amount is greater than the preset value, the preset value is specifically taken as 1mm, it indicates that the wear resistance of the transverse feeding mechanism is unqualified, and vice versa, it indicates that the wear resistance of the transverse feeding mechanism is qualified.

[0030] As one implementation method, the test device also includes an adjustment mechanism set on the base 3. There are two columns 4. The lower end of one column 4 is fixedly connected to the base 3, and the other column 4 can move horizontally under the action of the adjustment mechanism. The crossbeam 5 is horizontally fixedly connected between the upper ends of the two columns 4.

[0031] The above settings enable the test device to be equipped with crossbeams 5 of different lengths.

[0032] As one implementation, the adjustment mechanism includes a sliding seat 13, a first screw 14, and an adjustment motor 15. The sliding seat 13 is slidably connected to the upper side of the base 3, the lower end of the column 4 is fixedly connected to the upper side of the sliding seat 13, the first screw 14 is rotatably connected to the upper side of the base 3 and threadedly connected to the sliding seat 13, and the adjustment motor 15 is used to drive the first screw 14 to rotate.

[0033] With the above settings, the adjustment mechanism can drive the column 4 to move through the adjustment motor 15 and the first screw 14, and the adjustment mechanism has a self-locking function. After the adjustment motor 15 stops moving, it locks the position of the column 4.

[0034] The sliding seat 13 of this application is slidably connected to the upper side of the base 3 via a guide rail. The sliding direction of the sliding seat 13 is parallel to the crossbeam 5. The adjusting motor 15 drives the first screw 14. After the first screw 14 rotates relative to the sliding seat 13, the sliding seat 13 drives the column 4 to move horizontally. The column 4 moves closer to or further away from another column 4, and the distance between the two columns 4 increases or decreases.

[0035] As one implementation method, flanges 16 are welded to both ends of the crossbeam 5. The flanges 16 are fixed to the upper end of the column 4 by bolts 17. The test device also includes a support plate 18 fixedly connected to the side of the column 4. The support plate 18 abuts against the lower side of the flange 16.

[0036] The above settings facilitate the installation of crossbeam 5.

[0037] When hoisting the crossbeam 5, both ends of the crossbeam 5 rest on the support plate 18, and the flange 16 is fixed to the upper end of the column 4 by bolts 17.

[0038] As one implementation, the counterweight 10 includes a connecting component 101, a water bucket 102 and a valve 103. The upper side of the water bucket 102 is connected to the lower side of the slide plate 6 via the connecting component 101, and the valve 103 is located on the lower side of the water bucket 102.

[0039] The above settings allow for easy adjustment of the weight of the counterweight 10 by adding or removing water from the bucket 102.

[0040] The water bucket 102 of the counterweight 10 is initially empty and lightweight, making it easy to install the water bucket 102 on the underside of the slide plate 6 via the connecting assembly 101. The valve 103 can be connected to a water pump. When the valve 103 is opened, water is injected into the water bucket 102 through the valve 103 to increase the weight of the counterweight 10. When the valve 103 is opened to release water, the weight of the counterweight 10 can be reduced.

[0041] As one implementation, the counterweight 10 also includes a piston 104 and a guide post 105. The piston 104 is slidably connected inside the water bucket 102, and the guide post 105 vertically penetrates the piston 104 and is slidably connected to the piston 104. The lower end of the guide post 105 is fixedly connected to the bottom of the water bucket 102.

[0042] The above settings prevent the water in the bucket 102 from sloshing when the slide 6 moves.

[0043] In this application, the piston 104 and the water tank 102 form a closed chamber. When the water pump injects water into the water tank 102 through the valve 103, the water volume in the water tank 102 increases, and the piston 104 moves upward along the guide column 105. There is basically no air under the piston 104. When the slide plate 6 moves horizontally, the water in the water tank 102 will not shake, thus simulating the grinding head effect better.

[0044] In one implementation, the connecting assembly 101 includes a second screw 1011, an upper nut 1012, a lower nut 1013, a connecting plate 1014, and connecting rods 1015. Multiple second screws 1011 are provided, and the upper end of the second screw 1011 is welded to the lower side of the slide plate 6. The connecting plate 1014 is provided with an elongated hole 1016, through which the second screw 1011 passes. The upper nut 1012 is threadedly connected to the second screw 1011 and abuts against the upper side of the connecting plate 1014. The lower nut 1013 is threadedly connected to the second screw 1011 and abuts against the lower side of the connecting plate 1014. The connecting plate 1014 is horizontally fixed above the water bucket 102 via multiple connecting rods 1015.

[0045] With the above setup, the water bucket 102 is fixed to the underside of the slide plate 6 via the connecting rod 1015, connecting plate 1014, lower nut 1013, upper nut 1012, and second screw 1011; after loosening the upper nut 1012, the center of gravity of the counterweight 10 can be adjusted back and forth.

[0046] The connecting plate 1014 of this application is basically rectangular, with two elongated holes 1016 arranged in parallel. There are four second screws 1011, which pass through the two elongated holes 1016 in pairs. After tightening the upper nut 1012, the second screws 1011 are locked on the connecting plate 1014 to prevent the water bucket 102 from shaking. The elongated holes 1016 are perpendicular to the crossbeam 5. After loosening the upper nut 1012, the connecting plate 1014 can be adjusted back and forth to adjust the center of gravity of the counterweight 10. After the adjustment is completed, the upper nut 1012 is tightened.

[0047] As one implementation, the grating ruler 12 includes a ruler part 121 and a measuring head 122. The ruler part 121 is horizontally mounted on the upper side of the crossbeam 5, and the measuring head 122 is fixedly mounted on the upper side of the slide plate 6 and is opposite to the ruler part 121.

[0048] The grating ruler 12 of this application is purchased from the market. The ruler part 121 is fixedly installed on the upper side of the crossbeam 5. The measuring head 122 is close to the ruler part 121. The measuring head 122 is fixedly installed on the upper side of the slide plate 6 and moves with the slide plate 6. The measuring head 122 moves along the ruler part 121 and provides real-time feedback on the position of the measuring head 122 on the ruler part 121, thereby measuring the position of the slide plate 6.

[0049] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A test device for the transverse feed mechanism of a gantry grinding machine, characterized in that, The device includes a base, columns, a crossbeam, and a slide plate. The two ends of the crossbeam are horizontally fixed above the base via the columns. The slide plate is slidably connected to the side of the crossbeam. The transverse feeding mechanism includes a lead screw, a ball nut, and a servo motor. The lead screw is horizontally rotatable and mounted on the side of the crossbeam. The ball nut is fixedly mounted on the slide plate and cooperates with the lead screw. The servo motor is fixedly mounted at the end of the crossbeam and is connected to the lead screw for transmission. The testing device also includes a counterweight, an encoder, and a grating ruler. The counterweight is mounted on the underside of the slide plate and its weight is adjustable. The encoder is mounted at the end of the lead screw to detect the lead screw's rotation angle. The grating ruler is horizontally mounted on the crossbeam to detect the horizontal displacement of the slide plate.

2. The test device for the transverse feed mechanism of a gantry grinding machine according to claim 1, characterized in that, The test device also includes an adjustment mechanism set on the base. There are two columns. The lower end of one column is fixedly connected to the base, and the other column can move horizontally under the action of the adjustment mechanism. The crossbeam is horizontally fixedly connected between the upper ends of the two columns.

3. The test device for the transverse feed mechanism of a gantry grinding machine according to claim 2, characterized in that, The adjustment mechanism includes a sliding seat, a first screw, and an adjustment motor. The sliding seat is slidably connected to the upper side of the base, and the lower end of the column is fixedly connected to the upper side of the sliding seat. The first screw is rotatably connected to the upper side of the base and threadedly connected to the sliding seat. The adjustment motor is used to drive the first screw to rotate.

4. The test device for the transverse feed mechanism of a gantry grinding machine according to claim 1, characterized in that, Flanges are welded to both ends of the crossbeam, and the flanges are fixed to the upper end of the column by bolts. The test device also includes a support plate fixedly connected to the side of the column, and the support plate abuts against the lower side of the flange.

5. The test device for the transverse feed mechanism of a gantry grinding machine according to claim 1, characterized in that, The counterweight includes a connecting assembly, a water bucket, and a valve. The upper side of the water bucket is connected to the lower side of the slide plate via the connecting assembly, and the valve is located on the lower side of the water bucket.

6. The test device for the transverse feed mechanism of a gantry grinding machine according to claim 5, characterized in that, The counterweight also includes a piston and a guide column. The piston is slidably and sealed inside the water bucket. The guide column passes vertically through the piston and is slidably and sealed with the piston. The lower end of the guide column is fixedly connected to the bottom of the water bucket.

7. A test device for the transverse feed mechanism of a gantry grinding machine according to claim 6, characterized in that, The connecting assembly includes a second screw, an upper nut, a lower nut, a connecting plate, and connecting rods. Multiple second screws are provided, and the upper ends of the second screws are welded to the lower side of the slide plate. The connecting plate is provided with an elongated hole, through which the second screws pass. The upper nut is threadedly connected to the second screw and abuts against the upper side of the connecting plate. The lower nut is threadedly connected to the second screw and abuts against the lower side of the connecting plate. The connecting plate is horizontally fixed above the water bucket by multiple connecting rods.

8. The test device for the transverse feed mechanism of a gantry grinding machine according to claim 1, characterized in that, The grating ruler includes a ruler part and a measuring head. The ruler part is horizontally mounted on the upper side of the crossbeam, and the measuring head is fixedly mounted on the upper side of the slide plate and is opposite to the ruler part.

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