Deep hole part axis straightness detection device

Abstract

The utility model relates to a deep hole part axis linearity detection device comprising a long strip-shaped reference guide rail, a first adjustable slide block, a measuring slide block and a second adjustable slide block are successively arranged on the reference guide rail in a sliding manner, the first adjustable slide block is provided with a first support through a first installation plate, the measuring slide block is provided with a measuring head, and the second adjustable slide block is provided with a second support through a second installation plate. A second support is arranged on the second adjustable sliding block through a second mounting plate; the measuring head is connected with an external digital display through a data line, and data can be directly read on the external digital display; the measuring slide block is connected with a traction copper wire. Before measurement, the distance between the supports is adjusted according to the length of the pipe fitting to be measured; during measurement, firstly, a deep hole part needing to be detected is fixed, the detector is placed in a hole, after the detector is fixed, the copper wire is pulled, the measuring head moves, detection is started, data can be directly read on the digital display, straightness errors can be directly measured, and the detector has the advantages of being easy to operate, accurate, reliable, portable, efficient and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of non-destructive testing, in particular to a device for detecting the straightness of the axis of a deep hole part. Background Art

[0002] With the development and progress of society, the machinery manufacturing industry has increasingly stringent requirements for product quality. The corresponding standards clearly define the geometric and positional tolerances for each component in mechanical products. Deep-hole components are increasingly widely used in the machinery industry. In deep-hole machining, holes with an aspect ratio greater than 5 are generally referred to as deep holes. Deep holes are prevalent in modern weaponry, energy equipment, and automotive manufacturing. Examples include gun barrels, cannon barrels, hydraulic cylinders, engine fuel injection ports, hydraulic cylinder bores, roller vibrating wheel bearing housings, and excavator boom bores. Deep holes are also critical components of various equipment, such as hollow spindles for motor vehicles. Deep-hole machining tools have large aspect ratios, which can easily cause vibration during machining, impacting quality.

[0003] In production, in order to better evaluate the quality of deep-hole parts, it is often necessary to test the straightness of their axis centerlines, and to straighten and correct unqualified parts in a timely manner. Straightness is an indicator used to indicate the straightness of the line elements of a part, and the straightness error refers to the deviation between the actual measured axis centerline and the ideal axis centerline. For the surface of deep-hole parts, the straightness is required to cover the shape of the circular generatrix, straight generatrix and axis. Due to the limitations of the shape and structure of deep-hole parts, it is difficult for traditional measuring tools to enter the deep hole for measurement. Existing deep-hole axis straightness detection methods include straightness gauge method, ultrasonic measurement method, lever measurement method, laser alignment method, correction telescope measurement method, etc. Special equipment is expensive and has high requirements on the environment. At the production site of large deep-hole parts, there are often problems such as poor environmental adaptability, bulky equipment, complicated operation, and expensive equipment. The deep-hole parts to be measured cannot be measured quickly and accurately, which limits the improvement of product quality. However, optical straightness measuring instruments are expensive and have high requirements for the operating environment. Therefore, the applicant proposes a deep hole part axis straightness detection device that can quickly and accurately measure the geometric tolerance of deep hole parts at the processing site to ensure processing quality. Summary of the Invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a deep hole part axis straightness detection device with the advantages of simple operation, accuracy and reliability, portability, high efficiency and low cost.

[0005] The purpose of this utility model is achieved in this way:

[0006] A deep hole part axis straightness detection device includes a long reference guide rail, on which a first adjustable slider, a measuring slider, and a second adjustable slider are slidably arranged in sequence. The first adjustable slider is provided with a first support via a first mounting plate, the measuring slider is provided with a measuring head, and the second adjustable slider is provided with a second support via a second mounting plate.

[0007] The measuring head is connected to an external digital display via a data cable, and data can be directly read on the external digital display; one end of a traction copper wire is connected to the measuring slider, and the other end of the traction copper wire extends out of the measured depth hole;

[0008] The first support includes a vertically connected support plate and a connecting column. The support plate is vertically arranged below the reference guide rail. The middle of the support plate is vertically connected with a connecting column, and the connecting column is fixed on the first mounting plate. The structure of the second support is the same as that of the first support.

[0009] Furthermore, the length of the data line between the measuring head and the digital display is greater than the length of the reference guide rail.

[0010] Furthermore, the length of the traction copper wire is greater than the length of the reference guide rail.

[0011] Furthermore, two supporting feet arranged front and back are provided below the support plate, and the two supporting feet are arranged symmetrically and tilted outward, so that the side surface of the first support is in a six-shaped shape.

[0012] Furthermore, the measuring head adopts a dial indicator.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model provides a deep hole part axis straightness detection device with high practical value and accurate measurement. It is aimed at deep hole part measurement equipment, solves the high dependence of deep hole part measurement on high-precision actual benchmarks, achieves the required measurement accuracy with lower hardware investment, and realizes greater practical value. The modular design of the utility model integrates structural parts, makes the device light, and allows for accurate measurement.

[0015] The utility model is easy to operate and convenient to read data. You only need to put the detector into the deep hole, pull the measuring copper wire, and the measuring head will move, then you can start testing. The measuring head is connected to a digital display, and the dial indicator reading can be directly displayed on the digital display, which is convenient to read.

[0016] The utility model has good environmental adaptability and is suitable for use on production sites. It can perform on-site detection of the axis straightness of deep-hole parts with an inner diameter greater than 100 mm. It has high environmental tolerance, simple operation, good repeatability, and good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 This is an explosion diagram of the utility model.

[0019] Figure 3 It is the main view of the utility model.

[0020] Figure 4 It is a top view of the utility model.

[0021] in:

[0022] Reference guide rail 1, first adjustable slider 2, first support 3, measuring slider 4, measuring head 5, second adjustable slider 6, second support 7, digital display 8, traction copper wire 9. DETAILED DESCRIPTION

[0023] To better understand the technical solution of the present invention, the following detailed description is provided with reference to the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention; they are merely examples of possible implementations of the technical solution of the present invention. It should be noted that the description herein of the positional relationships of the various components, such as component A being located above component B, is based on the relative positions of the components in the illustrations and is not intended to limit the actual positional relationships of the components. Example 1

[0024] See also Figures 1-4 , Figure 1 A schematic diagram of the structure of the present invention is provided. As shown in the figure, the present invention relates to a device for detecting the axis straightness of a deep-hole part. The device comprises an elongated reference guide rail 1, on which a first adjustable slider 2, a measuring slider 4, and a second adjustable slider 6 are sequentially slidably mounted. A first support 3 is mounted on the first adjustable slider 2 via a first mounting plate. A measuring head 5 is mounted on the measuring slider 4. A second support 7 is mounted on the second adjustable slider 6 via a second mounting plate.

[0025] The measuring head 5 is connected to an external digital display 8 via a data line, and data can be directly read on the external digital display 8 ; the length of the data line between the measuring head 5 and the digital display 8 is greater than the length of the reference guide rail 1 .

[0026] One end of a traction copper wire 9 is connected to the measuring slide 4 , and the other end of the traction copper wire 9 extends out of the depth-measured hole. The length of the traction copper wire 9 is greater than the length of the reference guide rail 1 .

[0027] The first support 3 includes a vertically connected support plate and a connecting column. The support plate is vertically arranged below the reference guide rail 1. The middle part of the support plate is vertically connected with a connecting column, and the connecting column is fixed on the first mounting plate. Two front and rear support feet are provided below the support plate. The two support feet are tilted outward and arranged symmetrically, so that the side of the first support 3 is in a six-shaped shape, which increases the stability of the support.

[0028] The structure of the second support 7 is the same as that of the first support 3 .

[0029] The measuring head 5 is a dial indicator.

[0030] Working principle:

[0031] The utility model provides a deep hole part axis straightness detection device, which is mainly used for the straightness tolerance detection of the axis of a deep hole part in the production line. It is suitable for deep hole cavities with a hole diameter of more than 100mm. The specific parameters are as follows: workpiece length L: 600mm-2000mm, workpiece hole diameter d: ≥100mm, straightness error measurement range: 0-1000um.

[0032] The straightness error is expressed as the width of the minimum enclosed area of straightness, t or t, and is classified into three forms: within a given plane, in a given direction, and in any direction. The deep hole axis straightness error measured by the detection device of the utility model is in any direction.

[0033] During operation, the instrument's mechanical body must be placed within the hole. The support utilizes an inverted V-shaped centering and four-point positioning principle for positioning. A dial indicator is mounted on the measuring slide of the mechanical body, forming the measuring head. This measuring head is moved within the hole by an external copper wire. Pulling the wire synchronizes the measuring head's movement. The head measures straightness errors using a contact-type measurement method, using any element line on the deep hole surface as the measurement object and the guide rail as the reference. The dial indicator on the measuring head is connected to a digital display, allowing data to be read directly on the external display.

[0034] The deep hole part axis straightness detection device of the utility model is mainly made of metal materials such as steel, aluminum, and copper wire. It is safe, environmentally friendly, low in cost, can be easily transported to the place of use, and all materials can be recycled.

[0035] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A device for detecting the straightness of the axis of a deep hole part, characterized by: It comprises a long reference guide rail (1), on which a first adjustable slider (2), a measuring slider (4) and a second adjustable slider (6) are slidably arranged in sequence, a first support (3) being arranged on the first adjustable slider (2) via a first mounting plate, a measuring head (5) being arranged on the measuring slider (4), and a second support (7) being arranged on the second adjustable slider (6) via a second mounting plate; The measuring head (5) is connected to an external digital display (8) via a data line, and data can be directly read on the external digital display (8); one end of a pulling copper wire (9) is connected to the measuring slider (4), and the other end of the pulling copper wire (9) extends out of the depth hole to be measured; The first support (3) comprises a vertically connected support plate and a connecting column, the support plate being vertically arranged below the reference guide rail (1), the middle of the support plate being vertically connected to a connecting column, and the connecting column being fixed to the first mounting plate; the structure of the second support (7) is the same as that of the first support (3).

2. The deep hole part axis straightness detection device according to claim 1, characterized in that: The length of the data line between the measuring head (5) and the digital display (8) is greater than the length of the reference guide rail (1).

3. A deep hole part axis straightness detection device according to claim 1, characterized in that The length of the traction copper wire (9) is greater than the length of the reference guide rail (1).

4. The deep hole part axis straightness detection device according to claim 1, characterized in that: Two supporting feet are arranged front and back below the support plate, and the two supporting feet are arranged symmetrically and tilted outwards, so that the side surface of the first support (3) is in a six-shaped shape.

5. The deep hole part axis straightness detection device according to claim 1, characterized in that: The measuring head (5) adopts a dial indicator.

Images