Device and method for measuring oil pocket of large rotary table

Abstract

The invention discloses a large turntable oil pocket measuring device and method, and belongs to the technical field of machinery. A measuring device base is installed on the center of a rotary table base through a large screw, a ball body is pasted to the center concave position of the upper face of the base through an adhesive, a top block is installed on the lower plane of one end of a measuring arm through a long screw, a supporting column is installed on the lower plane of the other end of the measuring arm through a short screw, and then a vertical rod of a support is inserted into the lower face of the hollow supporting column from bottom to top. The bolt is inserted into the bolt hole between the supporting column and the support and connected with the bolt through the nut, the support and the support are pre-fastened, then the leveling ruler is installed on the support through the short screw, and after the adhesive of the ball is cured, the end, with the top block, of the measuring arm and the hollow position with inclination are placed on the ball. The end with the leveling ruler is placed on the oil pocket needing to be measured, and finally the gradienter is placed in the middle of the measuring arm.

Description

Technical Field

[0001] The invention relates to a device and method for measuring an oil pocket of a large turntable, belonging to the technical field of machinery. Background Art

[0002] CNC gantry vertical boring and milling machine is a very important processing equipment in the field of machinery. The rotating turntable and the fixed turntable base are very important components of the machine tool. There is a circle of oil pockets on the turntable base, and the oil pockets are in contact with the turntable hydrostatic guide rails. The outer wall of the oil pocket is connected to the multi-head pump through an oil pipe, and constant flow hydrostatic oil is sprayed from the inner wall. The oil pressure will generate an upward thrust, so that an oil film is generated between the turntable and the oil pocket, and the turntable floats upward, and then the turntable is finally driven to rotate by the rotation of the drive box gear.

[0003] The overall flatness of all the oil pockets installed and fixed on the turntable base is very important. The quality of the flatness is the key accuracy of whether the turntable can float, and it also affects the turntable end jump accuracy. If the deviation is serious, it may even cause direct friction between the turntable and the oil pocket, causing damage to the machine tool. However, since CNC gantry vertical lathes are often large, there are many oil pockets, and they are not continuous planes, it is very difficult to measure the flatness of all the oil pockets. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an oil pocket measuring device and method for a large turntable.

[0005] A device for measuring the oil pocket of a large turntable includes: a device base, a sphere, a top block, a long screw, a large screw, a measuring arm, a pillar, a support, a nut, a bolt, a flat ruler, a short screw, an oil pocket, a turntable base, and a level. The measuring device base is installed on the center of the turntable base through the large screw, and the sphere is attached to the central depression on the base with an adhesive. Secondly, the top block is installed on the lower plane of one end of the measuring arm through the long screw, and the pillar is installed on the lower plane of the other end of the measuring arm through the short screw. Then the vertical rod of the support is inserted from bottom to top under the hollow pillar, the bolt is inserted into the bolt hole between the pillar and the support, the support and the bracket are connected through the nut and the bolt, the support is pre-tightened, and then the flat ruler is installed on the support through the short screw. After waiting for the sphere adhesive to solidify, the measuring arm with the top block end and the inclined hollow position are placed on the sphere, and the end with the flat ruler is placed on the oil pocket to be measured, and finally the level is placed in the middle of the measuring arm to complete the assembly of the device.

[0006] A method for measuring the oil pocket of a large turntable includes the following steps: after the device is installed, the device is first debugged, and the tightness of the middle bolt between the support and the support is adjusted by the nut to make the support move up and down to adjust the height of the flat ruler end of the measuring arm, and finally the level pointer is adjusted to 0, and the nut is tightened so that the support no longer moves up and down, and the horizontal data of the oil pocket here is recorded as 0. Then, relying on the central sphere as the center of the circle and the measuring arm as the radius, one end of the measuring arm is lifted and rotated, and the device is placed above the second oil pocket to be measured, and the flat ruler contacts the oil pocket, and the horizontal value is checked and recorded. By analogy, all oil pockets are measured. All data are written into the calculation software or drawn on the coordinate paper to obtain the overall flatness graph of the oil pocket and calculate the final result. If the flatness exceeds the required accuracy standard, it is necessary to find the position of the oil pocket with an out-of-tolerance according to the flatness graph, and judge the scraping amount according to the flatness result. After the oil pocket is removed, the range of the oil pocket of the turntable base is scraped and repaired, and then the oil pocket is installed and removed for measurement again, and the result is recalculated in combination with other values ​​until the overall flatness of the oil pocket meets the technical requirements.

[0007] The advantage of the present invention is that the simple parts can be assembled, and the flatness of all the oil pockets on the turntable base can be measured very accurately through simple calculation or drawing of a graph by using a level. It is also very easy to find the position of the oil pocket with an excessive tolerance according to the flatness graph, and to judge the scraping amount according to the flatness result, and to easily complete the measurement of the discontinuous and multi-point oil pockets that cannot be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the figure:

[0009] Figure 1 It is a structural diagram of the device assembly of the present invention.

[0010] Figure 2 It is a cross-sectional view of the turntable base of the present invention.

[0011] Figure 3 It is a top view of the present invention. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] Example 1: Figure 1 , Figure 2 and Figure 3 As shown, a device for measuring the oil pocket of a large turntable comprises:

[0014] Device base 1: It is a cylinder with a large bottom and a small top, and its appearance is similar to a "thumbnail". There is a circle of screw holes under the device base, and large screws are used to connect the device base and the turntable base through the holes. On the top surface of the device, there is a spherical depression with a depth of 5mm, which is used to stick and place the ball.

[0015] Sphere 2: The structure is a sphere with a diameter of 50 mm, which is pasted to the base 1 of the device so that the top block 3 can rotate around the sphere 2, with the sphere 2 as the center and the measuring arm 6 as the radius.

[0016] Top block 3: It is a hollow cylinder with an inclination in the middle, and has screw holes and countersunk holes on the bottom.

[0017] Long screw 4: connects and fixes the top block 3 and the measuring arm 6.

[0018] Large screw 5: connects the device base 1 and the turntable base 15.

[0019] Measuring arm 6: It is a hollow rectangular square steel. Protrusions with processed planes are welded on the bottom of both ends of the square steel. Protrusions parallel to the bottom of both ends are welded on the middle part. There are threaded holes on the lower protruding plane. The measuring arm 6 is fixed to the through hole on the top block 3 by screws on the left side, and the measuring arm 6 is fixed to the through hole on the support 7 by screws on the right side.

[0020] Pillar 7: The upper part is a cuboid, with a hollow cylinder welded downward in the middle, and the shape is similar to a "T" shape. There are screw holes on the upper part of the cuboid, and bolt holes on the side of the lower cylinder for passing bolts. There are two slotted structures perpendicular to the side holes, and the support 9 can be locked and loosened by nuts.

[0021] The first short screw 8 is used to connect and fix the measuring arm 6 and the support column 7 .

[0022] Support 9: The upper part is a cylindrical body with steps, and the lower part is a rectangular parallelepiped. There are holes for passing bolts on the side of the cylindrical body, and there are holes for screws on the lower part of the rectangular parallelepiped. The support 9 and the ruler 12 are connected and fixed by a second short screw 13.

[0023] The nut 10 is used to connect and fix the support 7 and the support 9. After adjusting the level, tighten it to prevent it from moving up and down.

[0024] Bolt 11: One side is external threaded and the other side is square. The support 7 and the support 9 are fixed by adjusting the tightness of the nut.

[0025] Straightedge 12: A hollow rectangular steel tube parallel to the top and bottom, with a threaded hole on the top of the straightedge.

[0026] Oil pocket 14: A part on the turntable base 1. The oil pocket 14 is installed by screws and fixed on a circle with the same diameter of the turntable base 1. The outer shape is a cylindrical structure with a depression on the top. The inner wall has a through hole connected to the outer wall. The outer wall has an internal thread and is connected to the multi-head pump through an oil pipe. The inner wall sprays constant flow static pressure oil, which will generate an upward thrust through the oil pressure, and the vertical lathe turntable on the oil pocket 14 will float. After this part is installed, the overall flatness is particularly important, which is the key accuracy for whether the turntable can float.

[0027] Turntable base 15: The shape is circular, with a circular step in the middle, and a circle of threaded holes on the step plane. A circle of oil pockets 14 for oil outlet is fixed on the guide rail position on the turntable base 1. Constant flow static pressure oil is sprayed out by a multi-head pump, generating an upward thrust, which will float the turntable on the oil pocket 14.

[0028] Level 16: It is placed in the middle position on the measuring arm 6. It is used to measure the flatness of all oil pockets 14 on the turntable base 1, judging the height, lowness and level of the oil pocket according to the direction of the pointer.

[0029] A method for measuring the oil pocket of a large turntable, comprising the following steps:

[0030] First, the measuring device base 1 is mounted on the center of the turntable base 15 by means of a large screw 5, and the sphere 2 is adhered to the central depression on the device base 1 by means of an adhesive. Next, the top block 3 is mounted on the lower plane of one end of the measuring arm 6 by means of a long screw 4, and the support 7 is mounted on the lower plane of the other end of the measuring arm 6 by means of a first short screw 8.

[0031] Then insert the vertical rod of the support 9 from bottom to top under the hollow pillar 7, insert the bolt 11 into the bolt hole between the pillar 7, connect the nut 10 and the bolt 11, pre-tighten the pillar 7 and the support 9, and then install the straightedge 12 on the support 9 through the second short screw 13.

[0032] After waiting for the adhesive of the sphere 2 to solidify, the measuring arm 6 with one end of the top block 3 is placed on the sphere 2 with an inclined hollow position, and the end with the straightedge 12 is placed on the oil pocket 14 to be measured. Finally, the level 16 is placed in the middle of the measuring arm 6 to complete the assembly of the device.

[0033] Example 2: Figure 1 , Figure 2 and Figure 3 As shown, a method for measuring the oil pocket of a large turntable includes the following steps: after the device is installed, first debug the device, adjust the tightness of the middle bolt 11 between the support 7 and the support 9 by adjusting the nut 10, so that the support 9 moves up and down to adjust the height of the horizontal ruler end of the measuring arm 6, and finally adjust the pointer of the level 16 to 0, and tighten the nut 10 so that the support 9 no longer moves up and down, and at the same time record the horizontal data of the oil pocket here as 0.

[0034] Then, with the central sphere 2 as the center and the measuring arm 6 as the radius, lift the measuring arm 6 and one end of the straightedge 12 and rotate them, place the device above the second oil bag 14 to be measured, with the straightedge 12 in contact with the oil bag 14, check the value of the level 16 and record it.

[0035] And so on, all the oil pockets 14 are measured.

[0036] Write all the data into the calculation software or draw a graph on coordinate paper to obtain the overall flatness graph of the oil bag 14 and calculate the final result.

[0037] If the flatness exceeds the required accuracy standard, it is necessary to find the position of the out-of-tolerance oil pocket 14 based on the flatness graph and determine the scraping amount based on the flatness result.

[0038] After removing the oil bag, start scraping and repairing the turntable base 15 and the oil bag 14, then install and remove the oil bag 14, measure again, and recalculate the result in combination with other values ​​until the overall flatness of the oil bag 14 meets the technical requirements.

[0039] The advantage of the present invention is that the simple parts can be assembled, and the flatness of all the oil pockets on the turntable base can be measured very accurately through simple calculation or drawing of a graph by using a level. It is also very easy to find the position of the oil pocket with an excessive tolerance according to the flatness graph, and to judge the scraping amount according to the flatness result, and to easily complete the measurement of the discontinuous and multi-point oil pockets that cannot be measured.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for measuring oil pockets of large turntables, characterized in that: Install the base of the measuring device to the center of the turntable base with a large screw, and stick the sphere to the central depression on the base with adhesive. Next, install the top block to the lower plane of one end of the measuring arm with a long screw, and install the pillar to the lower plane of the other end of the measuring arm with a short screw. Then insert the vertical rod of the support from bottom to top under the hollow pillar, insert the bolt into the bolt hole between the pillar and the support, connect them with nuts and bolts, pre-tighten the support and the bracket, and then install the straightedge to the support with short screws. After waiting for the sphere adhesive to cure, place the measuring arm with the top block end and the inclined hollow position on the sphere, and place the end with the straightedge on the oil pocket to be measured. Finally, place a spirit level in the middle of the measuring arm.

2. The oil pocket measuring device for a large turntable according to claim 1 is characterized in that: Device base: It is a cylinder with a large bottom and a small top, and its appearance is similar to a "thumbnail". There is a circle of screw holes under the device base. The large screws are passed through the holes to connect the device base and the turntable base. On the top surface of the device, there is a spherical depression with a depth of 5mm, which is used to paste and place the sphere. Sphere: The structure is a sphere with a diameter of 50mm. It is pasted on the device base so that the top block can rotate around the sphere, with the sphere as the center and the measuring arm as the radius. Top block: It is a hollow cylinder with an inclination in the middle, and has screw holes and countersunk holes on the bottom. Long screw: connects the fixed top block and the measuring arm. Large screw: connects the base of the device and the base of the turntable. Measuring arm: It is a hollow rectangular square steel. There are protrusions with processed planes welded on the bottom of both ends of the square steel. There is a protrusion welded on the middle part parallel to the bottom of both ends. There are threaded holes on the protrusion plane below. The measuring arm is fixed to the through hole on the top block by screws on the left side, and the measuring arm is fixed to the through hole on the pillar by screws on the right side. Support: The upper part is a rectangular parallelepiped, with a hollow cylinder welded downward in the middle. The outer shape is "T". There are screw holes on the upper part of the rectangular parallelepiped, and bolt holes on the side of the lower cylinder for passing bolts. There are two slotted structures perpendicular to the side holes, and the support can be locked and loosened by nuts. The first short screw is used to connect and fix the measuring arm and the support. Support: The upper part is a cylinder with steps, and the lower part is a cuboid. There are holes for bolts on the side of the cylinder, and holes for screws on the lower part of the cuboid. The support and the ruler are fixed by the second short screw. Nut: It is used to connect and fix the support and the support. After adjusting the level, tighten it to prevent it from moving up and down. Bolt: One side is external thread and the other side is square. The support and the support are fixed by adjusting the tightness of the nut. Flat ruler: A hollow rectangular steel tube parallel to the top and bottom, with a threaded hole on the top. Oil pocket: a part on the turntable base. The oil pocket is installed by screws and fixed on a circle with the same diameter of the turntable base. It has a cylindrical structure with a depression on the top. The inner wall has a through hole connected to the outer wall. The outer wall has an internal thread and is connected to the multi-head pump through an oil pipe. Constant flow static pressure oil is sprayed out from the inner wall. Turntable base: The shape is circular, with a circular step in the middle, and a circle of threaded holes on the step plane. A circle of oil pockets for oil outlet is fixed on the guide rail position on the turntable base. Constant flow static pressure oil is sprayed out through a multi-head pump to generate an upward thrust to float the turntable on the oil pocket. Level: Placed in the middle of the measuring arm, it determines the height, lowness and level of the oil pocket side according to the direction of the pointer. It is an instrument used to measure the flatness of all oil pockets on the turntable base.

3. A method for measuring the oil pocket of a large turntable, characterized in that: The method includes the following steps: after the device is installed, the device is first debugged, and the tightness of the middle bolt between the support and the support is adjusted by the nut to move the support up and down to adjust the height of the flat ruler end of the measuring arm. Finally, the level pointer is adjusted to 0, and the nut is tightened so that the support no longer moves up and down. At the same time, the horizontal data of the oil pocket here is recorded as 0, and then the central sphere is used as the center of the circle and the measuring arm is used as the radius. One end of the measuring arm is lifted and rotated, and the device is placed above the second oil pocket to be measured. The flat ruler contacts the oil pocket, and the horizontal value is checked and recorded. By analogy, all oil pockets are measured, and all data are written into the calculation software or drawn on the coordinate paper to obtain the overall flatness graph of the oil pocket and calculate the final result. If the flatness exceeds the required accuracy standard, it is necessary to find the position of the oil pocket with an out-of-tolerance according to the flatness graph, and judge the scraping amount according to the flatness result. After removing the oil pocket, start scraping the range of the oil pocket of the turntable base, and then install and remove the oil pocket to measure again, and recalculate the result in combination with other values ​​until the overall flatness of the oil pocket meets the technical requirements.

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