Installation method for lathe bed lead screw position measuring device

Abstract

The invention discloses an installation method for a lathe bed lead screw position measuring device, and belongs to the technical field of machinery. The end face of one side of the measuring device base is connected with a side wing-shaped screw, the front face of the measuring device base is connected with an upper wing-shaped screw, the end face of the other side of the measuring device base is connected with a threaded rod, a positioning ball groove is formed in the bottom face of the measuring device base, and the threaded rod is connected with a meter rod through a fastening handle. The other end of the gauge rod is connected with the gauge rod of the dial gauge through the other fastening handle, the positioning ball is connected with the positioning ball groove, and the positioning ball is fixed in the top surface circular groove and the side surface circular groove of the measuring device base through glue. According to the invention, the defects of inaccurate measurement, need of repeated measurement and large error after multiple times of measurement caused by the fact that the bending plate cannot be tightly attached to the sliding block due to the fact that the strength of a human hand is difficult to control are overcome.

Description

Technical Field

[0001] The invention relates to an installation method for a bed screw position measuring device, belonging to the technical field of machinery. Background Art

[0002] The bed and worktable of CNC gantry boring and milling machine are important components of the machine tool structure, and their accuracy is the basis of the machine tool accuracy. The worktable moves along the bed rails and is driven by the precision ball screw installed on the bed. The accuracy of the screw installation will directly affect the accuracy of the entire machine tool and the stability of the accuracy of the entire machine during the use of the machine tool, and will directly affect the processing quality and efficiency of the machine tool. When the screw accuracy error is large, it may even cause damage to the machine tool.

[0003] The installation accuracy of the lead screw mainly involves the position of the lead screw and the linear guide of the bed, that is, the lead screw needs to be in the center of the two linear guides of the bed. And the parallelism of the upper busbar and side busbar of the lead screw and the linear guide of the bed. At this stage, the measurement of the lead screw is done with an "L"-shaped bent plate. The inner side of the bent plate is pressed against the linear guide slider on one side by the power of the hand, and then the slider is pushed to measure the position and parallelism of the lead screw on the bed. Since the power of the hand is difficult to control, the bent plate may not be able to stick to the slider, resulting in inaccurate measurement and repeated measurement. If the person is replaced and measured again, the data will be different, and data stability cannot be achieved. There may even be a situation where the error becomes larger and larger after multiple measurements, which will directly affect the motion accuracy and straightness of the machine tool worktable. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method for installing a bed screw position measuring device.

[0005] A device for measuring the position of a screw of a bed, wherein one end face of a base of the measuring device is connected to a side thumb screw, the front face of the base of the measuring device is connected to an upper thumb screw, the other end face of the base of the measuring device is connected to a threaded rod, the bottom face of the base of the measuring device is provided with a positioning ball groove, the threaded rod is connected to a dial rod through a tightening handle, the other end of the dial rod is connected to a dial rod of a dial indicator through another tightening handle, the positioning ball is connected to the positioning ball groove, and the positioning ball is respectively fixed in a circular groove on the top surface and a circular groove on the side surface of the base of the measuring device by gluing.

[0006] The cross-section of the device base is in the shape of], with 4 thumb screws on the top and 2 thumb screws on the side, 4 positioning ball grooves on the top surface and 2 positioning ball grooves on the side.

[0007] The invention discloses an installation method for a screw position measuring device for a bed, comprising the following steps: fixing a positioning ball in a circular groove on the top surface and a circular groove on the side surface of a measuring device base by gluing, placing the measuring device base on a slide block and connecting the positioning ball, making the top surface positioning ball contact with a reference surface on the slide block by gravity, installing a side thumb screw in a threaded hole on the outside of the measuring device base, rotating the side thumb screw handle so that the side thumb screw is pressed against the side surface of the slide block, making the reference surface on the other side of the slide block closely attached to the positioning ball on the inner side surface of the measuring device base, fixing the measuring device base and the slide block, passing the upper thumb screw through the through hole on the top surface of the measuring device base, rotating the upper thumb screw handle to install it in the threaded hole on the top surface of the slide block, making the positioning ball on the top surface of the measuring device base closely attached to the reference surface of the top surface of the slide block by means of the thread, connecting the measuring device base and the slide block, screwing in a threaded rod in the threaded hole on the side surface of the measuring device base facing the screw and tightening it, inserting a tightening handle into the other end of the threaded rod, installing a dial indicator in another hole of the tightening handle, and installing the tightening handle and a dial indicator on the other end of the dial indicator.

[0008] A method for measuring the position of a bed screw comprises the following steps:

[0009] The measurement steps of the upper busbar are as follows: install the measuring device base on the linear guide slider on one side of the machine bed, and fix it with the side thumb screws and the top thumb screws. During the fixing process, make the top sphere fit tightly against the reference surface on the slider, and the side sphere fit tightly against the reference surface on the slider, thus completing the fixation and positioning of the measuring device base. Then install the threaded rod, gauge rod, tightening handle and dial indicator to complete the installation of the measuring device.

[0010] After the measuring device is installed, loosen the tightening handle and adjust the position of the dial indicator rod so that the dial indicator needle contacts the upper busbar at one end of the screw. Then tighten the handle and rotate the dial indicator pointer to zero to complete the measurement of the distance from the linear guide to the upper busbar at one end of the screw and record the dial indicator value.

[0011] Utilize the linear motion of the slider on the linear guide to push the slider of the fixed measuring device, measure the distance from the linear guide to the busbar on the other end of the screw, check the value of the dial indicator, and according to the difference between the two readings of the dial indicator, adjust the thickness of the adjustment pad under the screw support seat, and then calibrate and measure the busbar on the screw again. The dial indicator values ​​of the busbars on both ends of the screw are the same, confirming that the busbar on the screw is parallel to the linear guide.

[0012] The measurement steps of the side busbar are to determine the center position of the lead screw in the linear guide rail.

[0013] After measuring the busbar on the screw, loosen the tightening handle, adjust the position of the indicator rod so that the dial indicator needle contacts the side busbar at one end of the screw, then tighten the handle, rotate the dial indicator pointer to zero, complete the measurement of the distance from the linear guide on one side to the screw, and record the dial indicator value.

[0014] Loosen the upper thumb screw and the side thumb screw, tighten and position the measuring device on the linear guide slider on the other side of the bed. Do not adjust the position of the gauge rod at this time, measure the distance from the linear guide to the side generatrix of one end of the screw, check the dial indicator value and record it, calculate the difference between the two dial indicators, divide the difference by 2 to get the moving distance of the screw support seat, adjust the position of the screw support seat according to the value, and adjust one end of the screw to the middle position between the two linear guides.

[0015] Utilize the linear motion of the slider on the linear guide to push the slider of the fixed measuring device, measure the distance from the linear guide to the generatrix on the other end of the screw, and adjust the position of the screw support seat at the other end according to the value of the dial indicator. Finally, when the values ​​measured by the dial indicator on the left and right linear guides of the screw are the same, determine that the screw is in the middle position of the linear guide and is parallel to the linear guide. Finally, use screws to tighten the screw support seat to complete the adjustment of the center position of the screw.

[0016] The advantages of the present invention are: it solves the problem that the bending plate may not be able to fit the slider firmly due to the difficulty in controlling the strength of the hands, resulting in inaccurate measurement, the need for repeated measurements, and large errors after multiple measurements. It greatly shortens the time for adjusting the screw, saves manpower and material resources, and saves costs. At the same time, the screw can achieve very good positioning accuracy, and the repeatable operation data is stable and unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 It is a front structural diagram of the present invention.

[0019] Figure 2 It is the bottom structure diagram of the present invention.

[0020] Figure 3 This is a usage state diagram of the present invention. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Figure 1 , Figure 2 and Figure 3 As shown, a device for measuring the position of a screw of a bed includes a measuring device base 1, an upper thumb screw 2, a side thumb screw 3, a positioning ball 4, a threaded rod 5, a gauge rod 6, a tightening handle 7, a dial indicator 8, a bed 9, a screw 10, a linear guide 11, a slider 12, a screw support seat 13, an adjustment pad 14, and a screw 15.

[0023] The measuring device base 1: has a shape of ], which is inverted on the slider 12, and has four through holes on the top surface according to the position of the slider threaded hole. There are four circular grooves on the inner top surface and two circular grooves on the inner side surface for pasting the positioning ball. There is a threaded hole in the middle of each side surface for installing the threaded rod. There are two threaded holes on one side for installing the thumb screw.

[0024] Upper thumb screw 2: The thumb screw with the same thread size as the slider is passed through the through hole on the top surface of the device base, and rotated to install it into the threaded hole on the top surface of the slider, so that the sphere on the top surface of the device base is firmly attached to the top surface of the slider, and at the same time, it plays the role of fixing the device base and the slider.

[0025] Side thumb screw 3: Installed in the threaded hole on the outside of the device base. By rotating the side thumb screw, the screw rests on the side of the slider, and the reference surface on the other side of the slider is pressed against the sphere on the inner side of the device base, thereby fixing the device base and the slider.

[0026] Positioning ball 4: The structure is a sphere with four positioning balls on the top surface and two positioning balls on the side. It is fixed on the base of the device and in the circular groove holes on the side by glue to fix the top surface reference and side reference of the positioning slider.

[0027] Threaded rod 5: It is cylindrical in appearance, with one end being threaded, the thread size being consistent with the middle threaded hole on the side of the slider, and is installed in the middle of the side of the device. The other end is a cylinder, which is used to fix the tightening handle.

[0028] The dial rod 6 is cylindrical in appearance, one end of which is connected to a fixed threaded rod through a tightening handle, and the other end of which is connected to a fixed dial indicator through a tightening handle.

[0029] A fastening handle 7; a fixing handle, having two rings with openings on the rings, through which the threaded rod and the dial rod, or the dial rod and the dial indicator, are passed, and the angle between them can be adjusted, and finally, by rotating the handle, the threaded rod and the dial rod can be fixed, or the dial indicator and the dial rod can be fixed.

[0030] Dial indicator 8: A measuring instrument made of a precision rack and pinion mechanism, installed on one side of the dial stem through a tightening handle, and used for measuring data.

[0031] Bed body 9: The main component of the machine tool, on which two linear guide rails are installed, and a lead screw is installed in the middle of the bed body.

[0032] Ball screw 10: The ball screw is installed in the middle of the bed body. It is the most commonly used transmission component in machine tools and precision machinery. Its main function is to convert rotational motion into linear motion, driving the workbench to perform reciprocating linear motion on the linear guide rail.

[0033] Linear guide rail 11: Installed on both sides of the bed body, with several sliders on it.

[0034] Slider 12: A component on the linear guide rail, used to support and fix the machine tool workbench, and enables the workbench to perform reciprocating linear motion on the linear guide rail through the rotation of the lead screw.

[0035] Lead screw support seat 13: Effectively supports the lead screw. It is a bearing seat connecting the lead screw and the motor, reducing vibration and friction, thereby improving the overall performance of the mechanical system.

[0036] Adjusting pad 14: A gasket used to adjust the height of the lead screw, reserving a certain amount of machining and grinding allowance, and grinding according to the measured data.

[0037] Screw 15, used to fasten the lead screw support seat to the bed body, loosen it before adjustment and tighten it after adjustment is completed.

[0038] Embodiment 2: As Figure 1 、 Figure 2 及 Figure 3 shown, a device for measuring the position of the lead screw on the bed body. The cross-section of the device base 1 is in the shape of ], or in the shape of 冂, buckled on the slider 12. One end face of the device base 1 is connected to the wing screw 3 on the side, and the front face of the device base 1 is connected to the wing screw 2 on the top. There are 4 wing screws 2 on the top and 2 wing screws 3 on the side. The other end face of the device base 1 is connected to the threaded rod 5. There are 4 positioning sphere grooves on the bottom surface of the device base 1. The threaded rod 5 is connected to the dial rod 6 through the tightening handle 7. The other end of the dial rod 6 is connected to the dial rod of the dial indicator 8 through another tightening handle 7. The positioning sphere 4 is connected to the positioning sphere groove. The positioning spheres 4 are respectively fixed in the top circular groove and the side circular groove of the device base 1 by glue paste, for positioning the top reference and the side reference of the slider 12.

[0039] The bed 9 is connected to the linear guide 11 and the slider 12, and the measuring device base 1 is connected to the slider 12. The top surface positioning ball 4 contacts the reference surface on the slider 12 through gravity. The side thumb screw 3 is installed in the threaded hole on the outside of the measuring device base 1. By rotating the handle of the side thumb screw 3, the side thumb screw 3 is pressed against the side of the slider 12, and the reference surface on the other side of the slider 12 is pressed against the inner side positioning ball 4 of the measuring device base 1, which plays a positioning role and also plays a role in fixing the measuring device base 1 and the slider 12. The upper thumb screw 2 is passed through the through hole on the top surface of the measuring device base 1, and the handle of the upper thumb screw 2 is rotated to install it in the threaded hole on the top surface of the slider 12. The top surface positioning ball 4 of the measuring device base 1 is pressed against the reference surface of the top surface of the slider 12 by means of the thread, which plays a positioning role and also plays a role in connecting and fixing the measuring device base 1 and the slider 12. In this way, the measuring device base 1 is firmly fixed on the slider 12 through the four upper thumb screws 2 and the two side thumb screws 3, and the positioning ball 4 is firmly attached to the two references of the top surface and the side surface of the slider 12, so that repeated positioning without error can be achieved.

[0040] Example 3: Figure 1 , Figure 2 and Figure 3 As shown, a method for measuring the position of a bed screw comprises the following steps:

[0041] The measurement steps of the upper busbar are as follows: the base of the measuring device is installed on the linear guide rail 11 and the slider 12 on one side of the machine bed 9, and fixed with the side thumb screw 3 and the top thumb screw 2. During the fixing process, the top sphere 4 is firmly attached to the reference surface on the slider 12, and the side sphere 4 is firmly attached to the reference surface on the slider 12, thus completing the fixing and positioning of the base 1 of the measuring device. Then install the threaded rod 5, the gauge rod 6, the tightening handle 7 and the dial indicator 7 to complete the installation of the measuring device.

[0042] After the measuring device is installed, loosen the tightening handle 7, adjust the position of the gauge rod 6, make the needle of the dial indicator 8 contact the upper busbar at one end of the screw 10, then tighten the handle 7, rotate the pointer of the dial indicator 8 to zero, complete the measurement of the distance from the linear guide 11 to the upper busbar at one end of the screw 10, and record the value of the dial indicator 8.

[0043] By using the linear motion of the slider 12 on the linear guide 11, push the slider 12 of the fixed measuring device, measure the distance from the linear guide 11 to the upper generatrix on the other end of the lead screw 10, check the value of the dial gauge 8, and according to the difference between the two values ​​of the dial gauge 8, grind and adjust the thickness of the adjustment pad 14 under the lead screw support seat 13. Then calibrate and measure the upper generatrix of the lead screw 10 again. If the values ​​of the dial gauge 8 of the upper generatrix on both ends of the lead screw 10 are the same, the parallelism of the upper generatrix of the lead screw 10 and the linear guide 11 can be determined.

[0044] Steps for measuring the side busbar: determine the center position of the screw 10 on the linear guide 11: After the measurement of the busbar on the screw 10 is completed, loosen the tightening handle 7, adjust the position of the dial indicator 6, make the needle of the dial indicator 8 contact the side busbar at one end of the screw 10, then tighten the handle 7, rotate the pointer of the dial indicator 8 to zero, complete the measurement of the distance from the linear guide 11 on one side to the screw 10, and record the value of the dial indicator 8.

[0045] Loosen the thumb screw 2 on the top and the thumb screw 3 on the side, and then use the same method to tighten and position the measuring device on the slider 12 of the linear guide 11 on the other side of the bed. Do not adjust the position of the gauge rod 6 at this time, measure the distance from the linear guide 11 to the side generatrix of one end of the lead screw 10, check the value of the dial indicator 8 and record it, calculate the difference between the two dial indicators, divide the difference by 2 to get the moving distance of the lead screw support seat 13, adjust the position of the lead screw support seat 13 according to the value, and adjust one end of the lead screw 10 to the middle position of the two linear guides 11.

[0046] Then, by using the linear motion of the slider 12 on the linear guide 11, push the slider 12 of the fixed measuring device, measure the distance from the linear guide 11 to the generatrix on the other end of the lead screw 10, and adjust the position of the lead screw support seat 13 on the other end according to the value of the dial gauge 8. Finally, when the values ​​of the left and right linear guides 11 measured by the dial gauge 8 are the same, it can be determined that the lead screw 10 is in the middle of the linear guide 11 and is parallel to the linear guide 11. Finally, use the screw 15 to tighten the lead screw support seat 13 to complete the adjustment of the center position of the lead screw 10.

[0047] 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 the position of a screw of a bed, characterized in that: One side end face of the measuring device base is connected to the side thumb screw, the front side of the measuring device base is connected to the upper thumb screw, the other side end face of the measuring device base is connected to the threaded rod, the bottom surface of the measuring device base is provided with a positioning ball groove, the threaded rod is connected to the dial rod through a tightening handle, the other end of the dial rod is connected to the dial rod of the dial indicator through another tightening handle, the positioning ball is connected to the positioning ball groove, and the positioning ball is respectively fixed in the top circular groove and the side circular groove of the measuring device base by glue.

2. A device for measuring the position of a screw in a bed according to claim 1, characterized in that: The cross-section of the device base is in the shape of], with 4 thumb screws on the top and 2 thumb screws on the side, 4 positioning ball grooves on the top surface and 2 positioning ball grooves on the side.

3. A method for installing a bed screw position measuring device, characterized in that: The invention comprises the following steps: fixing the positioning ball on the measuring device base and the circular groove hole on the side by gluing, placing the measuring device base on the slider and connecting it, making the top surface positioning ball contact with the reference surface on the slider by gravity, installing the side thumb screw in the threaded hole on the outside of the measuring device base, rotating the side thumb screw handle so that the side thumb screw is against the side of the slider, making the reference surface on the other side of the slider close to the positioning ball on the inner side of the measuring device base, fixing the measuring device base and the slider, passing the upper thumb screw through the through hole on the top surface of the measuring device base, rotating the upper thumb screw handle to install it in the threaded hole on the top surface of the slider, making the positioning ball on the top surface of the measuring device base close to the reference surface of the top surface of the slider by relying on the thread, connecting the measuring device base and the slider, screwing in and tightening the threaded rod in the threaded hole on the side of the measuring device base facing the lead screw, inserting the tightening handle into the other end of the threaded rod, installing the dial indicator on the other end of the dial indicator.

4. A method for measuring the position of a bed screw, characterized in that: Contains the following steps: The measurement steps of the upper busbar are as follows: install the base of the measuring device on the linear guide slider on one side of the machine bed, and fix it with the side thumb screws and the top thumb screws. During the fixing process, make the top sphere fit tightly against the reference surface on the slider, and the side sphere fit tightly against the reference surface on the slider, thus completing the fixing and positioning of the base of the measuring device. Then install the threaded rod, gauge rod, tightening handle and dial indicator to complete the installation of the measuring device. After the measuring device is installed, loosen the tightening handle, adjust the position of the dial indicator rod, make the dial indicator needle touch the upper busbar at one end of the screw, then tighten the handle, rotate the dial indicator pointer to zero, complete the measurement of the distance from the linear guide to the upper busbar at one end of the screw, and record the dial indicator value. Use the linear motion of the slider on the linear guide to push the slider of the fixed measuring device, measure the distance from the linear guide to the upper busbar on the other end of the screw, check the value of the dial indicator, and adjust the thickness of the adjustment pad under the screw support seat according to the difference between the two readings of the dial indicator. Then calibrate and measure the upper busbar of the screw again. The dial indicator values ​​of the upper busbars at both ends of the screw are the same, confirming that the upper busbar of the screw is parallel to the linear guide. Steps for measuring the side busbar to determine the center position of the lead screw in the linear guide: After measuring the busbar on the screw, loosen the tightening handle, adjust the position of the dial indicator rod, make the dial indicator needle touch the side busbar at one end of the screw, then tighten the handle, rotate the dial indicator pointer to zero, complete the measurement of the distance from the linear guide on one side to the screw, and record the dial indicator value. Loosen the thumb screws on the top and the thumb screws on the side, tighten and position the measuring device on the linear guide slider on the other side of the bed. Do not adjust the position of the gauge rod at this time. Measure the distance from the linear guide to the side generatrix of one end of the screw. Check the dial indicator value and record it. Calculate the difference between the two dial indicators. Divide the difference by 2 to get the moving distance of the screw support seat. Adjust the position of the screw support seat according to the value. Adjust one end of the screw to the middle position of the two linear guides. Utilize the linear motion of the slider on the linear guide to push the slider of the fixed measuring device, measure the distance from the linear guide to the generatrix on the other end of the screw, and adjust the position of the screw support seat at the other end according to the value of the dial indicator. Finally, when the values ​​measured by the dial indicator on the left and right linear guides of the screw are the same, determine that the screw is in the middle position of the linear guide and is parallel to the linear guide. Finally, use screws to tighten the screw support seat to complete the adjustment of the center position of the screw.

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