A device for detecting the depth of different steps in a deep hole in a narrow space

Abstract

The present invention discloses a depth detection device suitable for different steps in a deep hole in a narrow space. The detection device includes a Y-shaped bracket, a display unit, a mobile power supply, a measuring handle, a quick pressing plate, a guide block, a reinforcing bracket, a calibration block, a base plate support pad, a calibration base plate, an end bracket, a sensor, a sensor clamping block, a carbon fiber guide rail, a bracket, an end chuck and other parts; the depth tester adopts a comparative method for measurement, and it uses a calibrated measuring base for calibration, so that the measured value is reproduced on the measuring rod. During use, hold the measuring handle, clamp the measuring bracket at the rear end of the workpiece, and the sensor touches the corresponding plane to detect the position and size of the deep hole. It can realize the depth detection of different steps in a deep hole in a narrow space, solve the problem that the depth of different steps in a deep hole in a narrow space cannot be accurately measured, improve the processing and measurement accuracy of the product, and improve production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing detection, and in particular to a device for detecting depths between different steps in a deep hole in a narrow space. Background Art

[0002] The device for detecting the depths of different steps in deep holes in a narrow space is used for detecting the depths of different steps in deep holes of workpieces. By real-time detection of the corresponding depth dimensions, the corresponding cutting parameters are adjusted to ensure the processing dimensional accuracy.

[0003] The dimensions between different steps of the workpiece are precise, and the dimensions need to be measured online during the processing process. In fact, the distance between the detected surface a and the detected surface b, and the distance between the detected surface a and the detected surface c are required, such as Figure 1 As shown; limited by the small space and complex structure of the tapered inner hole, the existing measuring device cannot meet the measurement needs. Precision measuring equipment such as three-coordinate measuring can meet the accuracy requirements, but cannot meet the needs of on-site use. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting the depths of different steps in a deep hole in a narrow space, which solves the problem that the depths of different steps in a deep hole in a narrow space cannot be accurately measured, improves the processing and measurement accuracy of the product, and improves production efficiency.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A device for detecting the depths of different steps in a deep hole in a narrow space, comprising a measuring module and a checking module;

[0007] The measuring module comprises a Y-shaped bracket, a guide rail, a first sensor, a second sensor, a third sensor and a sensor clamping block;

[0008] One end of the guide rail is fixedly connected to the right end surface of the Y-shaped bracket 1, and the other end is connected to the first sensor; two sensor clamping blocks are slidably connected to the guide rail, the middle sensor clamping block is connected to the second sensor, and the other sensor clamping block is connected to the third sensor;

[0009] The height distance of the second sensor relative to the first sensor is the same as the radial distance between the measured surface a and the measured surface b; the height distance of the third sensor relative to the first sensor is the same as the radial distance between the measured surface a and the measured surface c;

[0010] The calibration module comprises a guide block, a calibration block, a calibration base plate, an end bracket and a bracket; the bracket is vertically fixed on the calibration base plate, and three calibration blocks are arranged at intervals on the upper end of the calibration base plate, and the spacing between the left end face of the left calibration block and the left end face of the right calibration block is the same as the axial distance between the measured surface a and the measured surface c; the spacing between the left end face of the middle calibration block and the left end face of the right calibration block is the same as the axial distance between the measured surface and the measured surface; the spacing between the left end face of the right calibration block and the left end face of the bracket is the same as the axial distance between the measured surface a and the processing reference surface d;

[0011] The right calibration block is also provided with an end bracket for supporting the guide rail of the measurement module;

[0012] The measuring module and the checking module are detachably connected, the two are fixed during calibration and separated during detection;

[0013] The surface where the Y-shaped bracket contacts the bracket is used as the detection reference surface, and the surface where the bracket contacts the Y-shaped bracket is used as the calibration reference surface. During calibration, the detection reference surface is aligned with the calibration reference surface, and during detection and calibration, the detection reference surface is aligned with the processing reference surface.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] The present invention provides a device for detecting the depths of different steps in a deep hole in a narrow space. Through the coordinated use of a Y-shaped bracket, a display unit, a mobile power supply, a measuring grip, a quick pressing plate, a guide block, a reinforcing bracket, a calibration block, a bottom plate supporting pad, a calibration bottom plate, an end bracket, a sensor, a sensor clamping block, a carbon fiber guide rail, a bracket, and an end chuck, the depths of different steps in a deep hole in a narrow space can be detected, the processing and measurement accuracy of the product can be improved, the object to be measured does not need to be removed from a machine tool, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a simplified structural diagram of the workpiece being measured.

[0017] Figure 2 It is a front view of the depth detection device.

[0018] Figure 3 A top view of the depth detection device.

[0019] Figure 4 It is the left view of the depth detection device. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Combination Figure 2-Figure 4, a depth detection device for different steps in a deep hole in a narrow space of this embodiment includes a measuring module and a checking module;

[0022] The measuring module includes a Y-shaped bracket 1, a display unit 2, a mobile power supply 3, a measuring handle 4, a first sensor 17, a second sensor 12, a third sensor 18, a sensor clamping block 13, and a carbon fiber guide rail 14;

[0023] The calibration module includes a guide block 6, a reinforcing bracket 7, a calibration block 8, a base plate support pad 9, a calibration base plate 10, an end bracket 11, a bracket 15, and an end clamp 16;

[0024] One end of the carbon fiber guide rail 14 is fixedly connected to the right end face of the Y-shaped bracket 1, and the other end is connected to the first sensor 17 through the end clamp 16; two sensor clamping blocks 13 are slidably connected to the carbon fiber guide rail 14, the middle sensor clamping block 13 is connected to the second sensor 12, and the other sensor clamping block 13 is connected to the third sensor 18; the height distance of the second sensor 12 relative to the first sensor 17 is the same as the radial distance d1 between the measured surface a and the measured surface b; the height distance of the third sensor 18 relative to the first sensor 17 is the same as the radial distance d2 between the measured surface a and the measured surface c.

[0025] The right end face of the Y-shaped bracket 1 is used as the detection reference surface, and the left end face of the bracket 15 is used as the calibration reference surface. The right end face of the Y-shaped bracket 1 is in contact with the left end face of the bracket 15; two measuring handles 4 are fixed to the left end face of the Y-shaped bracket 1. The data of the above three sensors are displayed through the display unit 2. The mobile power supply 3 is used to power the display unit 2. The display unit 2 and the mobile power supply 3 are both fixed to the Y-shaped bracket 1. The two upper brackets of the Y-shaped bracket 1 are both provided with a slide groove 1-1, and a slider 1-2 is slidably connected in the slide groove. The slider 1-2 is located on the right end face of the Y-shaped bracket 1 and can slide up and down and be fixed. The height and spacing of the two sliders are adjustable, and can support inner objects of different diameters. During measurement, one end of the object to be measured is supported on the two sliders 1-2, and the processing reference surface d is in contact with the right end face of the Y-shaped bracket 1.

[0026] The bracket 15 is vertically fixed on the calibration base plate 10. The bottom of the calibration base plate 10 is provided with a plurality of base plate support pads 9, and three calibration blocks 8 are arranged at intervals on the upper end; the spacing between the left end face of the left calibration block 8 and the left end face of the right calibration block 8 is the same as the axial distance h2 between the measured surface a and the measured surface c; the spacing between the left end face of the middle calibration block 8 and the left end face of the right calibration block 8 is the same as the axial distance h1 between the measured surface b and the measured surface a, and the spacing between the left end face of the right calibration block 8 and the left end face of the bracket 15 is the same as the axial distance between the measured surface a and the processing reference surface d. Two reinforcing brackets 7 are arranged between the bracket 15 and the calibration base plate 10. The right calibration block 8 is also provided with an end bracket 11 for supporting the carbon fiber guide rail 14. The left end face of the bracket 15 is provided with two guide blocks 6, and the gap between the guide blocks 6 is used for the insertion of the vertical end of the Y-shaped bracket 1, which has a limiting and guiding effect on the Y-shaped bracket 1, so that the Y-shaped bracket is in a vertical state. After the Y-shaped bracket 1 is inserted, the Y-shaped bracket 1 is fixed between the two guide blocks 6 by the quick pressing plate 5 to ensure that the right end face of the Y-shaped bracket 1 is in contact with the left end face of the bracket 15.

[0027] Before measuring, the present invention places the measuring module on the calibration module for calibration. First, the Y-shaped bracket 1 is placed on the calibration base plate 10. When placed, the carbon fiber guide rail 14 can be supported by the end bracket 11. The Y-shaped bracket 1 is quickly clamped and fixed using the quick pressing plate 5 to ensure that the right end face of the Y-shaped bracket 1 fits the left end face of the bracket 15.

[0028] Open the display unit 2, make the first sensor 17 contact with the right calibration block 8, slide the two sensor clamping blocks 13 on the carbon fiber guide rail 14, so that the second sensor 12 and the third sensor 18 contact with the middle calibration block 8 and the left calibration block 8 respectively, while keeping the readings of the three sensors unchanged, and fix the positions of the two sensor clamping blocks 13 and the carbon fiber guide rail 14.

[0029] After the verification is completed, the quick pressing plate 5 is removed, and the Y-shaped bracket 1 is separated from the verification module by the measuring handle 4. Then the object to be measured is supported on the slider 1-2 (the spacing between the two sliders 1-2 is adjusted according to the object to be measured), and the processing reference surface d of the object to be measured is fitted with the right end surface of the Y-shaped bracket 1. The actual processing depth of the measured surface a is measured by the first sensor 17. The first sensor 17 is extended to display a positive value, indicating that the actual processing depth of the measured surface a is greater than the design value. The first sensor 17 is retracted to display a negative value, indicating that the actual processing depth of the measured surface a is less than the design value. Similarly, the actual processing depth of the measured surface b can be measured by the second sensor 12, and the actual processing depth of the measured surface c can be measured by the third sensor 18. According to the actual processing depth and the theoretical design value, the actual radial distance h1 between the measured surface a and the measured surface b, and the actual radial distance h2 between the measured surface a and the measured surface c can be obtained.

[0030] When the workpiece is being processed on the machine tool, hold the measuring handle and clamp the Y-shaped bracket 1 on the rear end of the workpiece to be measured. When the sensor touches the corresponding plane, the position and size of the deep hole can be detected, achieving fast and efficient detection. This special depth equipment uses imported sensors and display devices, and the maximum indication error of the measurement is 3μm. Its actual use adopts comparative measurement, and the maximum indication error within the range of ±0.5mm is 0.4μm. It can be simply measured (using one sensor) or comprehensively measured (using 2 sensors).

[0031] The detection device adopts a lightweight design, which is designed under the premise of taking into account the rigidity and thermal expansion effects. A carbon fiber material guide rail 14 with low thermal expansion coefficient performance is adopted in the length direction. The carbon fiber rod adopts a hexagonal design, which has a certain guiding property when clamping the sensor in the length direction. The calibration block 8 on the calibration base 10 is inlaid with wear-resistant material (hard alloy) at the corresponding position of the contact with the sensor to increase its wear resistance and prevent the size from changing significantly.

[0032] The above are only the main features, working principles and advantages of the present invention. For those skilled in the art, the present invention is not limited to the above embodiments. Without violating its basic principles, the present invention can be flexibly modified and changed for different embodiments. These modifications and changes, if within the spirit and scope of the present invention, should all fall within the protection scope of the present invention.

Claims

1. A device for detecting the depth of different steps in a deep hole in a narrow space, comprising a measuring module and a checking module; characterized in that: The measuring module comprises a Y-shaped bracket, a guide rail, a first sensor, a second sensor, a third sensor and a sensor clamping block; One end of the guide rail is fixedly connected to the right end surface of the Y-shaped bracket, and the other end is connected to the first sensor; two sensor clamping blocks are slidably connected to the guide rail, the middle sensor clamping block is connected to the second sensor, and the other sensor clamping block is connected to the third sensor; The height distance of the second sensor relative to the first sensor is the same as the radial distance between the measured surface a and the measured surface b; the height distance of the third sensor relative to the first sensor is the same as the radial distance between the measured surface a and the measured surface c; The calibration module comprises a guide block, a calibration block, a calibration base plate, an end bracket, and a bracket; the bracket is vertically fixed on the calibration base plate, and three calibration blocks are arranged at intervals on the upper end of the calibration base plate, and the spacing between the left end face of the left calibration block and the left end face of the right calibration block is the same as the axial distance between the measured surface a and the measured surface c; the spacing between the left end face of the middle calibration block and the left end face of the right calibration block is the same as the axial distance between the measured surface b and the measured surface a; the spacing between the left end face of the right calibration block and the left end face of the bracket is the same as the axial distance between the measured surface a and the processing reference surface d; The right calibration block is also provided with an end bracket for supporting the guide rail of the measurement module; The measuring module and the checking module are detachably connected, the two are fixed during calibration and separated during detection; The surface where the Y-shaped bracket contacts the bracket is used as the detection reference surface, and the surface where the bracket contacts the Y-shaped bracket is used as the calibration reference surface. During calibration, the detection reference surface is aligned with the calibration reference surface, and during detection and calibration, the detection reference surface is aligned with the processing reference surface.

2. The device for detecting depths between different steps in a deep hole in a narrow space according to claim 1 is characterized in that: The two upper brackets of the Y-shaped bracket are both provided with a slide groove, and a slider is slidably connected in the slide groove. The slider is located on the detection reference surface of the Y-shaped bracket and can slide up and down and be fixed.

3. The device for detecting depths between different steps in a deep hole in a narrow space according to claim 1 is characterized in that: Two handles are fixed on the non-detection reference surface of the Y-shaped bracket.

4. The device for detecting depths between different steps in a deep hole in a narrow space according to claim 1 is characterized in that: Two guide blocks are arranged on the calibration reference surface of the bracket, and the gap between the guide blocks is used for inserting the vertical end of the Y-shaped bracket. The Y-shaped bracket is fixed between the two guide blocks by a quick pressing plate.

5. The device for detecting depths between different steps in a deep hole in a narrow space according to claim 1 is characterized in that: The guide rail is made of carbon fiber.

6. The device for detecting depths between different steps in a deep hole in a narrow space according to claim 1 is characterized in that: Two reinforcement brackets are arranged between the bracket and the calibration base plate.

7. The device for detecting depths between different steps in a deep hole in a narrow space according to claim 1 is characterized in that: The position where the calibration block contacts the sensor is inlaid with wear-resistant material.

8. The device for detecting depths between different steps in a deep hole in a narrow space according to any one of claims 1 to 7, characterized in that: The detection process is: First, place the Y-shaped bracket on the calibration base plate, support the guide rail through the end bracket, and clamp the Y-shaped bracket to ensure that the right end face of the Y-shaped bracket fits the left end face of the bracket; Open the display unit, make the first sensor contact with the right calibration block, slide the two sensor clamping blocks on the carbon fiber guide rail, make the second sensor and the third sensor contact with the middle calibration block and the left calibration block respectively, make the readings of the three sensors unchanged, and fix the positions of the two sensor clamping blocks and the carbon fiber guide rail; After the calibration is completed, the Y-shaped bracket is separated from the calibration module by the measuring handle, and then the object to be measured is supported on the slider, and the processing reference surface d of the object to be measured is fitted with the right end surface of the Y-shaped bracket. The actual processing depth of the measured surface a is measured by the first sensor, the actual processing depth of the measured surface b can be measured by the second sensor, and the actual processing depth of the measured surface c can be measured by the third sensor.

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