A measuring tool and method for measuring the spacing between linear rails of a machine tool bed

Abstract

The present invention discloses a measuring tool and method for measuring the linear rail spacing of a machine tool bed. The mold includes a frame, a first measuring unit and a second measuring unit. The first measuring unit is installed at one end of the frame, and the second measuring unit is installed at the other end of the frame. The spacing between the first measuring unit and the second measuring unit is adapted to the linear rail spacing of the machine tool bed. The linear rail spacing of the machine tool bed is the distance between the left and right linear rails on the machine tool bed. The first measuring unit includes a dial indicator, a movable probe, a probe pin, a slide seat, a slider, a first spring and a positioning block, and the second measuring unit includes an adjustable probe, a clamping block, a clamping screw and a second spring. The measuring tool has good overall structural stability and versatility, is easy to use, can improve measurement accuracy and repeated measurement accuracy, thereby improving the self-checking accuracy of the machine tool bed during the processing stage and ensuring the consistency of the linear rail spacing of the machine tool bed, reducing the number of reworks, saving time and cost, and improving production efficiency.

Description

Technical Field

[0001] The invention relates to a measuring tool, in particular to a measuring tool and a method for measuring the spacing between linear rails of a machine tool bed. Background Art

[0002] In the actual production process, the bed components of many machine tool products adopt the design of spliced ​​bed. The bed serves as the base for supporting the workbench. The running accuracy of the workbench will largely depend on the accuracy of the bed rails. A spliced ​​bed with insufficient consistency in the bed rail spacing may not even be able to be assembled normally. Therefore, it is very necessary to ensure the consistency of the bed rail spacing of each part of the spliced ​​bed.

[0003] At present, the measuring tool used to ensure the consistency of the bed rail spacing is mainly composed of two square steel pipes fixed vertically in a T shape, and a dial indicator installed on one side of the bed rail is used to achieve consistency measurement. The measurement process is as follows: first, place the measuring tool on another work surface with a standard bed rail spacing, set the plus and minus values ​​of the dial indicator, and then transfer the measuring tool to the bed rails to be measured. The size of the rail spacing is determined by the positive and negative changes in the dial indicator value, and then determine whether the rail spacing meets the consistency requirements. However, this type of measuring tool has many problems during use. Uncontrollable factors during the transfer of the measuring tool will cause the dial indicator to move, resulting in poor repeated measurement accuracy of the measuring tool, making it difficult to ensure the consistency of the rail spacing. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a measuring tool and method for measuring the linear rail spacing of a machine tool bed, which has good overall structural stability and versatility and is easy to use, in view of the shortcomings of the prior art. The measuring tool and method can improve the measurement accuracy and repeated measurement accuracy, thereby improving the self-inspection accuracy during the machine tool bed processing stage and ensuring the consistency of the linear rail spacing of the machine tool bed, reducing the number of rework times, saving time costs, and improving production efficiency.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a measuring tool for measuring the linear rail spacing of a machine tool bed, comprising a frame, a first measuring unit and a second measuring unit, wherein the first measuring unit is mounted at one end of the frame, and the second measuring unit is mounted at the other end of the frame, and the spacing between the first measuring unit and the second measuring unit is adapted to the linear rail spacing of the machine tool bed, and the linear rail spacing of the machine tool bed is the distance between the left and right linear rails on the machine tool bed;

[0006] The first measuring unit comprises a dial indicator, a movable probe, a measuring pin, a slide seat, a slider, a first spring and a positioning block, the slide seat is fixed at one end of the frame, the slider can be slidably arranged in the slide seat, the first spring crosses the inner side wall of the slide seat, the two ends of the first spring extend into the slider and the frame respectively, the measuring pin is transversely installed on the outer side of the slider, the measuring rod of the dial indicator crosses the slide seat and is opposite to the measuring pin, the positioning block is arranged at the lower side of the frame, the movable probe passes through the positioning block from bottom to top and is threadedly connected to the slider, the movable probe does not contact the positioning block, the bottom of the movable probe is provided with a first positioning part, the width of the first positioning part is smaller than the width of the linear rail groove of the machine tool bed, and the first positioning part is used to fit the side surface of the linear rail groove of the machine tool bed during the measurement process;

[0007] The second measuring unit comprises an adjustable probe, a clamping block, a clamping screw and a second spring, the adjustable probe comprises a vertical part and a horizontal part which are vertically arranged in a T-shape, the other end of the frame is provided with a through slot which is connected up and down, the vertical part is penetrated in the through slot, the width of the through slot is greater than the width of the vertical part, the edge of the through slot is provided with a scale line, a pad is clamped between the horizontal part and the frame, a second positioning part is integrally provided at the bottom of the horizontal part, the width of the second positioning part is less than the width of the linear rail groove of the machine tool bed, the second positioning part is used to fit the side surface of another linear rail groove of the machine tool bed during the measurement process, the clamping block is arranged on the upper side of the adjustable probe and embedded in the through slot, a threaded through hole is provided in the adjustable probe, the clamping screw passes through the clamping block and is threadedly connected to the threaded through hole, the second spring is sleeved on the clamping screw, and the second spring is compressed by a gasket and arranged between the clamping block and the adjustable probe.

[0008] Preferably, two sliding rods are fixed on the sliding seat on the left and right sides, and the two sliding rods cross the sliding block on the left and right sides respectively, and the sliding block can slide left and right along the two sliding rods.

[0009] Preferably, two positioning bosses are arranged at intervals at the bottom of the positioning block, the width of the positioning bosses is smaller than the width of the linear rail groove of the machine tool bed, and the mobile probe is arranged between the two positioning bosses. The two positioning bosses have an initial positioning effect on the placement of the measuring tool on the machine tool bed.

[0010] Preferably, a fixing screw is vertically mounted at one end of the frame, and the fixing screw is used to tighten and fix the dial indicator. Fixing the dial indicator by the fixing screw has a simple structure and is convenient and flexible to use.

[0011] Preferably, the number of the second positioning parts is two, and the two second positioning parts are arranged in a front-to-back spacing. The design of the two second positioning parts in a front-to-back spacing can ensure the reliability of the measurement result.

[0012] Preferably, a plurality of handles are installed on the upper side of the frame.

[0013] Preferably, the frame adopts a hollow design to reduce the weight of the measuring tool and facilitate use.

[0014] A method for measuring the linear rail spacing of a machine tool bed using the above-mentioned measuring tool comprises the following steps:

[0015] (1) Place the measuring tool on the standard machine tool bed model so that the first positioning portion of the bottom of the movable probe fits against the side surface of a machine tool bed linear rail groove on the standard machine tool bed model, and the second positioning portion of the bottom of the adjustable probe fits against the side surface of another machine tool bed linear rail groove on the standard machine tool bed model;

[0016] (2) Adjust the position of the measuring rod of the dial indicator so that the head of the measuring rod presses against the measuring pin on the slider. At this time, under the elastic action of the first spring, the slider is in a stationary state, and the measuring rod of the dial indicator produces a certain value due to pressure. Then fix the position of the dial indicator and adjust the reading of the dial indicator to zero. Record the scale value corresponding to the scale line on the edge of the through groove on the inner side of the clamping block at this time. This scale value is the standard value of the linear rail spacing of the machine tool bed;

[0017] (3) The measuring tool is transferred to the bed of the machine tool to be tested, so that the second positioning part of the bottom of the adjustable probe is in contact with the side surface of another machine bed linear rail groove on the bed of the machine tool to be tested, and the first positioning part of the bottom of the movable probe is in contact with the side surface of a machine bed linear rail groove on the bed of the machine tool to be tested. At this time, if the linear rail spacing of the bed of the machine tool to be tested is larger than the standard value, the slider will slide toward the dial indicator under the action of the rebound force of the first spring, so that the measuring rod of the dial indicator will display a positive value due to further pressure. The positive value is the larger value of the linear rail spacing of the bed of the machine tool to be tested; if the linear rail spacing of the bed of the machine tool to be tested is smaller than the standard value, the movable probe will drive the slider to slide toward the first spring, so that the dial indicator, which was originally in a compressed state, will relax and display a negative value. The negative value is the smaller value of the linear rail spacing of the bed of the machine tool to be tested;

[0018] (4) By obtaining the larger or smaller value of the linear rail spacing of the machine tool bed to be tested, the actual value of the linear rail spacing of the machine tool bed to be tested can be calculated.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. During the measurement and use of the measuring tool of the present invention, it is only necessary to first adjust the dial indicator to zero on the standard machine tool bed model, and then the measuring tool can be transferred to the machine tool bed to be measured, so as to conveniently and quickly measure the linear rail spacing of the machine tool bed to be measured. In addition, the overall structural stability of the measuring tool is good, and the displacement of parts will not occur during the transfer process, which can improve the measurement accuracy and repeated measurement accuracy, thereby improving the self-checking accuracy of the machine tool bed processing stage and ensuring the consistency of the linear rail spacing of the machine tool bed, reducing the number of reworks, saving time costs, and improving production efficiency;

[0021] 2. The position of the adjustable probe of the measuring tool of the present invention can be adjusted within a certain range, thereby improving the compatibility of the measuring tool with the machine tool bed. The measuring tool has good versatility and is not limited to a single specification of machine tool beds. It can meet the measurement requirements of the linear rail spacing of machine tool beds of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a rendering of the measuring tool in the embodiment after being placed on a standard machine tool bed model;

[0023] Figure 2 To correspond to Figure 1 A top view of

[0024] Figure 3 After magnification 3 times Figure 2 Middle AA section view;

[0025] Figure 4 for Figure 2 Middle BB section view;

[0026] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0027] Figure 6 for Figure 4 Enlarged view of point D in the middle;

[0028] Figure 7 This is an appearance diagram of the positioning block in the embodiment;

[0029] Figure 8 1 is an appearance diagram of the adjustable probe in the embodiment. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] Embodiment 1: A measuring tool for measuring the linear rail spacing of a machine tool bed, as shown in the figure, comprises a frame 1, a first measuring unit and a second measuring unit. The frame 1 adopts a hollow design, and two handles 11 are installed on the upper side of the frame 1. The first measuring unit is installed at one end of the frame 1, and the second measuring unit is installed at the other end of the frame 1. The spacing between the first measuring unit and the second measuring unit is adapted to the linear rail spacing of the machine tool bed, and the linear rail spacing of the machine tool bed is the distance between the left and right linear rails on the machine tool bed.

[0032] In the first embodiment, the first measuring unit includes a dial indicator 2, a movable probe 22, a measuring pin 23, a slide 24, a slider 25, a first spring 26 and a positioning block 27. The slide 24 is fixed at one end of the frame 1. The slider 25 can be slidably arranged in the slide 24. Two slide bars 28 are fixed to the slide 24. The two slide bars 28 cross the slider 25 respectively. The slider 25 can slide left and right along the two slide bars 28. The first spring 26 crosses the inner side wall of the slide 24. The two ends of the first spring 26 extend into the slider 25 and the frame 1 respectively. The measuring pin 23 is horizontally installed on the outer side of the slider 25. The measuring rod 21 of the dial indicator 2 The sliding seat 24 is crossed left and right and is opposite to the measuring pin 23. A fixing screw 12 is vertically installed at one end of the frame 1. The fixing screw 12 is used to tighten and fix the dial indicator 2. A positioning block 27 is arranged on the lower side of the frame 1. The positioning block 27 is used to determine the horizontal position of the measuring tool during the measurement process; the mobile probe 22 passes through the positioning block 27 from bottom to top and is threadedly connected with the sliding block 25. The mobile probe 22 does not contact the positioning block 27. A first positioning portion 29 is provided at the bottom of the mobile probe 22. The width of the first positioning portion 29 is less than the width of the linear rail groove of the machine tool bed. The first positioning portion 29 is used to fit the side surface of the linear rail groove of the machine tool bed during the measurement process.

[0033] In Example 1, the second measuring unit includes an adjustable probe 31, a clamping block 32, a clamping screw 33 and a second spring 34. The adjustable probe 31 includes a vertical portion 35 and a horizontal portion 36 that are vertically arranged in a T-shape. A through slot 13 that is connected up and down is opened at the other end of the frame 1. The vertical portion 35 is inserted into the through slot 13. The width of the through slot 13 is greater than the width of the vertical portion 35. A scale line 14 is provided on the edge of the through slot 13. A pad 4 is clamped between the horizontal portion 36 and the frame 1. The thickness of the pad 4 can be grinded according to requirements to ensure that the levelness of the measuring tool during use meets the requirements; two second positioning portions 37 that are spaced apart from each other are integrally provided at the bottom of the horizontal portion 36. The second positioning portions 37 are spaced apart from each other at a front and rear interval. The width of the portion 37 is smaller than the width of the linear rail groove of the machine tool bed. The second positioning portion 37 is used to fit the side surface of another linear rail groove of the machine tool bed during the measurement process. The clamping block 32 is arranged on the upper side of the adjustable probe 31 and embedded in the through groove 13. A threaded through hole 38 is opened in the adjustable probe 31. The clamping screw 33 passes through the clamping block 32 and is threadedly connected to the threaded through hole 38. The clamping block 32 cooperates with the clamping screw 33 to determine the downward position of the adjustable probe 31. The second spring 34 is sleeved on the clamping screw 33. The second spring 34 is compressed and arranged between the clamping block 32 and the adjustable probe 31 through a gasket 39. The second spring 34 and the gasket 39 contribute to the elastic reset of the clamping block 32 and the clamping screw 33.

[0034] In Embodiment 1, two positioning bosses 20 are spaced apart at the front and rear of the bottom of the positioning block 27 . The width of the positioning boss 20 is smaller than the width of the linear rail groove of the machine tool bed. The movable probe 22 is disposed between the two positioning bosses 20 .

[0035] Embodiment 2: A method for measuring the spacing between linear rails of a machine tool bed using the above-mentioned measuring tool comprises the following steps:

[0036] (1) The measuring tool is placed on the standard machine tool bed model 5, so that the first positioning portion 29 of the bottom of the movable probe 22 is in contact with the side surface 52 of a machine tool bed linear rail groove 51 on the standard machine tool bed model 5, and the second positioning portion 37 of the bottom of the adjustable probe 31 is in contact with the side surface 54 of another machine tool bed linear rail groove 53 on the standard machine tool bed model 5;

[0037] (2) Adjust the position of the measuring rod 21 of the dial gauge 2 so that the head of the measuring rod 21 presses against the measuring pin 23 on the slide block 25. At this time, under the elastic action of the first spring 26, the slide block 25 is in a stationary state, and the measuring rod 21 of the dial gauge 2 produces a certain value due to the pressure. Then fix the position of the dial gauge 2 by the fixing screw 12 and adjust the reading of the dial gauge 2 to zero. At this time, record the scale value corresponding to the side surface 54 of the machine tool bed linear rail groove 53 under the clamping block 32 on the scale line 14 on the edge of the through groove 13. This scale value is the standard value of the linear rail spacing of the machine tool bed.

[0038] (3) The measuring tool is transferred to the machine bed to be tested (the structure is exactly the same as the machine bed model 5), so that the second positioning portion 37 at the bottom of the adjustable probe 31 is in contact with the side surface of another machine bed linear rail groove on the machine bed to be tested (see Figure 6 ), and make the first positioning portion 29 at the bottom of the mobile probe 22 fit against the side surface of a machine bed linear rail groove on the machine bed to be measured (see Figure 5 ), at this time, if the linear rail spacing of the machine tool bed to be tested is larger than the standard value, the slider 25 will slide toward the dial indicator 2 under the action of the rebound force of the first spring 26, so that the measuring rod 21 of the dial indicator 2 is further compressed and displays a positive value, and the positive value is the larger value of the linear rail spacing of the machine tool bed to be tested; if the linear rail spacing of the machine tool bed to be tested is smaller than the standard value, the moving probe 22 will drive the slider 25 to slide toward the first spring 26, so that the dial indicator 2 that was originally kept in a compressed state is relaxed and displays a negative value, and the negative value is the smaller value of the linear rail spacing of the machine tool bed to be tested;

[0039] (4) By obtaining the larger or smaller value of the linear rail spacing of the machine tool bed to be tested, the actual value of the linear rail spacing of the machine tool bed to be tested can be calculated.

Claims

1. A measuring tool for measuring the spacing between linear rails of a machine tool bed, characterized in that: It includes a frame, a first measuring unit and a second measuring unit, wherein the first measuring unit is mounted at one end of the frame, and the second measuring unit is mounted at the other end of the frame, and the spacing between the first measuring unit and the second measuring unit is adapted to the spacing between the linear rails of the machine tool bed, and the spacing between the linear rails of the machine tool bed is the distance between the left and right linear rails on the machine tool bed; The first measuring unit comprises a dial indicator, a movable probe, a measuring pin, a slide seat, a slider, a first spring and a positioning block, the slide seat is fixed at one end of the frame, the slider can be slidably arranged in the slide seat, the first spring crosses the inner side wall of the slide seat, the two ends of the first spring extend into the slider and the frame respectively, the measuring pin is transversely installed on the outer side of the slider, the measuring rod of the dial indicator crosses the slide seat and is opposite to the measuring pin, the positioning block is arranged at the lower side of the frame, the movable probe passes through the positioning block from bottom to top and is threadedly connected to the slider, the movable probe does not contact the positioning block, the bottom of the movable probe is provided with a first positioning part, the width of the first positioning part is smaller than the width of the linear rail groove of the machine tool bed, and the first positioning part is used to fit the side surface of the linear rail groove of the machine tool bed during the measurement process; The second measuring unit comprises an adjustable probe, a clamping block, a clamping screw and a second spring, the adjustable probe comprises a vertical part and a horizontal part which are vertically arranged in a T-shape, the other end of the frame is provided with a through slot which is connected up and down, the vertical part is penetrated in the through slot, the width of the through slot is greater than the width of the vertical part, the edge of the through slot is provided with a scale line, a pad is clamped between the horizontal part and the frame, a second positioning part is integrally provided at the bottom of the horizontal part, the width of the second positioning part is less than the width of the linear rail groove of the machine tool bed, the second positioning part is used to fit the side surface of another linear rail groove of the machine tool bed during the measurement process, the clamping block is arranged on the upper side of the adjustable probe and embedded in the through slot, a threaded through hole is provided in the adjustable probe, the clamping screw passes through the clamping block and is threadedly connected to the threaded through hole, the second spring is sleeved on the clamping screw, and the second spring is compressed by a gasket and arranged between the clamping block and the adjustable probe.

2. A measuring tool for measuring the spacing between linear rails of a machine tool bed according to claim 1, characterized in that: Two sliding rods are fixed on the sliding seat on the left and right sides. The two sliding rods respectively cross the sliding block on the left and right sides. The sliding block can slide left and right along the two sliding rods.

3. The measuring tool for measuring the linear rail spacing of a machine tool bed according to claim 1, characterized in that: Two positioning bosses are arranged at intervals at the front and rear of the bottom of the positioning block. The width of the positioning bosses is smaller than the width of the linear rail groove of the machine tool bed. The movable probe is arranged between the two positioning bosses.

4. The measuring tool for measuring the spacing between linear rails of a machine tool bed according to claim 1, characterized in that: A fixing screw is vertically installed at one end of the frame, and the fixing screw is used to tighten and fix the dial indicator.

5. The measuring tool for measuring the linear rail spacing of a machine tool bed according to claim 1, characterized in that: The number of the second positioning parts is two, and the two second positioning parts are arranged at a front-to-back interval.

6. The measuring tool for measuring the linear rail spacing of a machine tool bed according to claim 1, characterized in that: A plurality of handles are installed on the upper side of the frame.

7. The measuring tool for measuring the spacing between linear rails of a machine tool bed according to claim 1, characterized in that: The frame adopts a hollow design.

8. A method for measuring the linear rail spacing of a machine tool bed using the measuring tool according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Place the measuring tool on the standard machine tool bed model so that the first positioning portion of the bottom of the movable probe fits against the side surface of a machine tool bed linear rail groove on the standard machine tool bed model, and the second positioning portion of the bottom of the adjustable probe fits against the side surface of another machine tool bed linear rail groove on the standard machine tool bed model; (2) Adjust the position of the measuring rod of the dial indicator so that the head of the measuring rod presses against the measuring pin on the slider. At this time, under the elastic action of the first spring, the slider is in a stationary state, and the measuring rod of the dial indicator produces a certain value due to pressure. Then fix the position of the dial indicator and adjust the reading of the dial indicator to zero. Record the scale value corresponding to the scale line on the edge of the through groove of the side surface of the linear rail groove of the machine tool bed under the clamping block. This scale value is the standard value of the linear rail spacing of the machine tool bed. (3) The measuring tool is transferred to the bed of the machine tool to be tested, so that the second positioning part of the bottom of the adjustable probe is in contact with the side surface of another machine bed linear rail groove on the bed of the machine tool to be tested, and the first positioning part of the bottom of the movable probe is in contact with the side surface of a machine bed linear rail groove on the bed of the machine tool to be tested. At this time, if the linear rail spacing of the bed of the machine tool to be tested is larger than the standard value, the slider will slide toward the dial indicator under the action of the rebound force of the first spring, so that the measuring rod of the dial indicator will display a positive value due to further pressure. The positive value is the larger value of the linear rail spacing of the bed of the machine tool to be tested; if the linear rail spacing of the bed of the machine tool to be tested is smaller than the standard value, the movable probe will drive the slider to slide toward the first spring, so that the dial indicator, which was originally in a compressed state, will relax and display a negative value. The negative value is the smaller value of the linear rail spacing of the bed of the machine tool to be tested; (4) By obtaining the larger or smaller value of the linear rail spacing of the machine tool bed to be tested, the actual value of the linear rail spacing of the machine tool bed to be tested can be calculated.

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