Special detection device and method for special-shaped deep groove

Abstract

The invention relates to the technical field of machining, and discloses a special detection device and method for a special-shaped deep groove, a first mounting seat is used for mounting a second measuring head, the distance between the first measuring head and the second measuring head is adjusted, a measuring tool can adopt a cross frame structure design with a dial indicator, and the measuring tool is simple in structure and convenient to use. The device can be stably erected on the end face of a to-be-measured special-shaped deep groove and is static relative to a part during measurement, and the problem that the diameter measurement error is large due to slight inclination during measurement is avoided. The inner diameter of the standard part is used as a standard value for measuring the diameter of the to-be-measured special-shaped deep groove, and the difference between the diameter of the standard part and the diameter of the to-be-measured special-shaped deep groove is compared according to the degree of the dial indicator, so that the inner diameter dimension parameter of the to-be-measured special-shaped deep groove can be calculated. In addition, the elastic telescopic rod is used for applying pressing force to the first mounting seat, so that the dimensional deviation caused by the weight of the first mounting block during vertical measurement can be counteracted, and the accuracy of the diameter data of the to-be-measured special-shaped deep groove is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing and discloses a special detection device and method for special-shaped deep grooves. Background Art

[0002] At present, the diameter measuring tools used to measure special-shaped deep grooves are mostly sliding calipers, dial calipers or reverse claw calipers. The sliding calipers are used to measure the relevant diameter dimensions. However, when measuring the diameter of special-shaped deep grooves with large diameters (≥Φ100mm), due to the large span, the existing sliding caliper structure is a cantilever structure, the weight is large, and the manual measurement is slightly tilted, resulting in large diameter measurement errors and poor consistency in repeated measurements. It is impossible to achieve accurate measurement of special-shaped deep grooves, which limits the application of sliding caliper measuring tools in some occasions where accurate measurement of large diameters of special-shaped deep grooves is required. Summary of the invention

[0003] The object of the present invention is to provide a special detection device and method for special-shaped deep grooves, which can ensure the accuracy of the diameter data of the special-shaped deep grooves to be measured.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0005] A special detection device for special-shaped deep grooves, comprising:

[0006] A base, wherein a sliding guide assembly is provided on the base;

[0007] A first measuring head, wherein the first measuring head is mounted on a base;

[0008] a second measuring head, the second measuring head being arranged in parallel with the first measuring head; the second measuring head being movably mounted on the sliding guide assembly through a first mounting seat, the first mounting seat being provided with a first locking screw which can cooperate with the movable guide assembly and is used to adjust and limit the distance between the second measuring head and the first measuring head;

[0009] A second mounting seat, the second mounting seat is fixed on the base, and the second mounting seat is located between the first mounting seat and the first measuring head; the second mounting seat is provided with an elastic telescopic rod that can abut against the first mounting seat and is used to apply a pressing force to the first mounting seat;

[0010] A dial indicator is installed on a base through a fixed support, the elastic telescopic rod and the measuring probe of the dial indicator are coaxially arranged, and the elastic telescopic rod and the measuring probe of the dial indicator are respectively located on two sides of a first mounting base.

[0011] Furthermore, the first mounting seat is provided with a mounting hole parallel to the first measuring head, the second measuring head is inserted into the mounting hole, and the first mounting seat is provided with a second locking screw that can abut against the outer wall of the second measuring head in the mounting hole, for adjusting and limiting the elongation of the second measuring head relative to the first mounting seat.

[0012] Furthermore, a guide groove is provided on the base, a third mounting seat is movably installed in the guide groove, and the first measuring head is movably set on the base through the third mounting seat; a third locking screw that can cooperate with the third mounting seat is provided on the base, and is used to adjust and limit the distance between the first measuring head and the second measuring head.

[0013] Furthermore, the elastic telescopic rod includes a cylinder fixed on the second mounting seat, a force transmission rod is inserted into the cylinder, one end of the force transmission rod is abutted against the first mounting seat, and the other end of the force transmission rod is located in the inner cavity of the cylinder; an adjusting screw is installed at the end of the cylinder away from the force transmission rod through an internal thread, and a compressed spring is arranged between the adjusting screw and the force transmission rod.

[0014] Furthermore, the sliding guide assembly includes a slide bar arranged on the base, and the first mounting seat is provided with a slide groove matching the slide bar.

[0015] In order to achieve the above technical effects, the present invention also provides a special detection method for special-shaped deep grooves. The method is based on the special detection device for special-shaped deep grooves, and comprises:

[0016] According to the structure and diameter range of the special-shaped deep groove to be tested, select the standard parts with corresponding inner diameter;

[0017] Using equal height blocks, the special detection device for the special-shaped deep groove to be tested is horizontally placed above the standard part, the relative positions of the first mounting seat and the first measuring head are adjusted, and the first measuring head and the second measuring head are made to contact the inner wall of the standard part groove, and the first measuring head and the second measuring head are respectively located at the theoretical diameter end positions of the groove of the standard part;

[0018] Return the pointer of the dial indicator to zero, then place the special detection device for the special-shaped deep groove to be measured in a position parallel to the notch of the special-shaped deep groove to be measured, and make the first measuring head and the second measuring head abut against the inner wall of the special-shaped deep groove to be measured, and adjust the elastic telescopic rod so that the elastic telescopic rod generates a pressing force on the first mounting seat;

[0019] The size of the special-shaped deep groove to be measured is calculated based on the value read from the dial indicator and the actual size of the groove of the standard part.

[0020] Furthermore, the elastic telescopic rod comprises a barrel fixed on the second mounting seat, a force transmission rod is inserted into the barrel, one end of the force transmission rod is in contact with the first mounting seat, and the other end of the force transmission rod is located in the inner cavity of the barrel; an adjusting screw is installed at the end of the barrel away from the force transmission rod through an internal thread, and a compressed spring is arranged between the adjusting screw and the force transmission rod; the pressing force of the elastic telescopic rod on the first mounting seat is adjusted by rotating the elongation of the adjusting screw in the barrel, so that the pressing force F of the elastic telescopic rod on the first mounting seat is equal to (m 1 +1.5m 2 )g+F o +F 1 , where m 1 is the mass of the first mounting base, m 2 is the mass of the force transmission rod, g is the acceleration due to gravity, F o is the compression force of the dial indicator, F 1 It is the minimum stress that causes elastic bending deformation of the force transfer rod after being compressed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention adopts a first mounting seat to install the second measuring head and realizes the adjustment of the distance between the first measuring head and the second measuring head. The measuring tool can adopt a horizontal frame structure design with a dial indicator, which can be stably mounted on the end face of the special-shaped deep groove to be measured. During measurement, it is stationary relative to the part, avoiding the problem of slight tilt in measurement, which leads to large diameter measurement errors.

[0023] The present invention uses the inner diameter of the standard part as the standard value for measuring the diameter of the special-shaped deep groove to be measured, and compares the difference between the diameter of the standard part and the diameter of the special-shaped deep groove to be measured according to the degree of the dial indicator, so as to calculate the inner diameter size parameters of the special-shaped deep groove to be measured. In addition, the elastic telescopic rod is used to apply a pressing force to the first mounting seat, so as to offset the dimensional deviation caused by the weight of the first mounting block when measuring vertically, and further ensure the accuracy of the diameter data of the special-shaped deep groove to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the measurement standard part of the special detection device for special-shaped deep grooves in the embodiment;

[0025] Figure 2 It is a structural schematic diagram of the special detection device for special-shaped deep grooves in the embodiment for measuring the special-shaped deep grooves to be tested;

[0026] Figure 3 Schematic diagram of the structure of the special detection device for special-shaped deep grooves in the embodiment;

[0027] Figure 4 It is a structural schematic diagram of the elastic telescopic rod in the embodiment;

[0028] Among them, 1. base; 2. sliding guide assembly; 3. first measuring head; 4. second measuring head; 5. first mounting seat; 6. first locking screw; 7. second mounting seat; 8. elastic telescopic rod; 801. cylinder; 802. force transmission rod; 803. adjusting screw; 804. spring; 9. dial indicator; 10. fixed support; 11. second locking screw; 12. guide groove; 13. third mounting seat; 14. third locking screw; 15. standard parts; 16. equal height block; 17. special-shaped deep groove to be measured. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the embodiments and drawings. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0030] Example

[0031] See also Figure 1-Figure 4 , a special detection device for special-shaped deep grooves, comprising:

[0032] A base 1, wherein a sliding guide assembly 2 is provided on the base 1;

[0033] A first measuring head 3, wherein the first measuring head 3 is installed on the base 1;

[0034] a second measuring head 4, the second measuring head 4 being arranged in parallel with the first measuring head 3; the second measuring head 4 being movably mounted on the sliding guide assembly 2 through a first mounting seat 5, the first mounting seat 5 being provided with a first locking screw 6 which can cooperate with the movable guide assembly and is used to adjust and limit the distance between the second measuring head 4 and the first measuring head 3;

[0035] A second mounting seat 7, the second mounting seat 7 is fixed on the base 1, and the second mounting seat 7 is located between the first mounting seat 5 and the first measuring head 3; the second mounting seat 7 is provided with an elastic telescopic rod 8 that can abut against the first mounting seat 5, and is used to apply a pressing force to the first mounting seat 5;

[0036] The dial indicator 9 is mounted on the base 1 via a fixed support 10 , the elastic telescopic rod 8 and the measuring probe of the dial indicator 9 are coaxially arranged, and the elastic telescopic rod 8 and the measuring probe of the dial indicator 9 are respectively located on both sides of the first mounting base 5 .

[0037] In this embodiment, the process of the special detection device for special deep grooves is as follows:

[0038] Step 1: Select a standard part 15 with a corresponding inner diameter according to the structure and diameter range of the special-shaped deep groove 17 to be tested;

[0039] Step 2: Use the equal height block 16 to horizontally place the special detection device for the special-shaped deep groove to be tested above the standard part 15, adjust the relative position of the first mounting seat 5 and the first measuring head 3, and make the first measuring head 3 and the second measuring head 4 contact the inner wall of the groove of the standard part 15, and make the first measuring head 3 and the second measuring head 4 respectively located at the theoretical diameter end position of the groove of the standard part 15;

[0040] Step 3, return the pointer of the dial indicator 9 to zero, then place the special detection device for the special-shaped deep groove to be measured in a position parallel to the notch of the special-shaped deep groove 17 to be measured, and make the first measuring head 3 and the second measuring head 4 abut against the inner wall of the special-shaped deep groove 17 to be measured, and adjust the elastic telescopic rod 8 so that the elastic telescopic rod 8 generates a pressing force on the first mounting seat 5;

[0041] The elastic telescopic rod 8 in this embodiment includes a cylinder 801 fixed on the second mounting seat 7, a force transmission rod 802 is inserted into the cylinder 801, one end of the force transmission rod 802 is in contact with the first mounting seat 5, and the other end of the force transmission rod 802 is located in the inner cavity of the cylinder 801; an adjusting screw 803 is installed on the end of the cylinder 801 away from the force transmission rod 802 through an internal thread, and a compressed spring 804 is arranged between the adjusting screw 803 and the force transmission rod 802. The compression amount of the spring 804 can be adjusted by rotating the adjusting screw 803, so as to adjust the pressing force of the force transmission rod 802 on the first mounting seat 5. The adjustment amount of the adjusting screw 803 can be quantified by a scale to achieve precise adjustment of the pressing force, so that the pressing force F of the elastic telescopic rod 8 on the first mounting seat 5 is F=(m 1 +1.5m 2 )g+F o +F 1 , where m 1 is the mass of the first mounting seat 5, m 2 is the mass of the force transmission rod 802, g is the acceleration due to gravity, F o is the compression force of dial gauge 9, F 1 It is the minimum stress that causes elastic bending deformation of the force transmission rod 802 after being compressed.

[0042] Step 4: Calculate the size of the special-shaped deep groove 17 to be measured based on the value read from the dial indicator 9 and the actual size of the groove of the standard part 15.

[0043] In this embodiment, the first mounting seat 5 is used to install the second measuring head 4, and the spacing between the first measuring head 3 and the second measuring head 4 is adjusted. The measuring tool can adopt a horizontal frame structure design with a dial indicator 9, which can be stably placed on the end face of the special-shaped deep groove 17 to be measured. During measurement, it is stationary relative to the part to avoid slight tilt during measurement, which leads to large diameter measurement errors. When measuring, firstly, the standard part 15 with the same size as the special-shaped deep groove 17 to be measured is placed flat, and the inner diameter of the groove of the standard part 15 is calibrated by using a special-shaped deep groove detection device; then, the special-shaped deep groove detection device is used to measure the special-shaped deep groove 17 to be measured, and the inner diameter of the standard part 15 is used as the standard value for measuring the diameter of the special-shaped deep groove 17 to be measured, and the difference between the diameter of the standard part 15 and the special-shaped deep groove 17 to be measured is compared according to the degree of the dial indicator 9, so that the inner diameter size parameters of the special-shaped deep groove 17 to be measured can be calculated; in addition, during the process of measuring the size of the special-shaped deep groove 17 to be measured, especially the vertical groove with the opening facing the horizontal direction, the elastic telescopic rod 8 can be used to apply a clamping force to the first mounting seat 5, so as to offset the dimensional deviation caused by the weight of the first mounting block when measuring vertically, and further ensure the accuracy of the diameter data of the special-shaped deep groove 17 to be measured.

[0044] In this embodiment, a mounting hole parallel to the first measuring head 3 is provided on the first mounting seat 5, and the second measuring head 4 is inserted in the mounting hole. The first mounting seat 5 is provided with a second locking screw 11 that can abut against the outer wall of the second measuring head 4 in the mounting hole, and is used to adjust and limit the elongation of the second measuring head 4 relative to the first mounting seat 5. It can adapt to the measurement of the diameter of special-shaped deep grooves of different depth sizes, and can avoid the interference of other structures of the special-shaped deep groove structure with the detection device.

[0045] The base 1 is provided with a guide groove 12, in which a third mounting seat 13 is movably mounted, and the first measuring head 3 is movably mounted on the base 1 through the third mounting seat 13; the base 1 is provided with a third locking screw 14 that can cooperate with the third mounting seat 13, and is used to adjust and limit the distance between the first measuring head 3 and the second measuring head 4. By movably connecting the first measuring head 3 with the base 1 using the third movable mounting seat, when adjusting the distance between the first measuring head 3 and the second measuring head 4, the relative position of the first mounting seat 5 on the base 1 can be adjusted, and the relative position of the third mounting seat 13 on the base 1 can also be adjusted, so as to achieve a coarse adjustment of the distance between the two measuring heads of the detection device.

[0046] In this embodiment, the sliding guide assembly 2 includes a slide bar arranged on the base 1, and a slide groove cooperating with the slide bar is arranged on the first mounting seat 5. The first mounting seat 5 adopts the slide groove and the slide bar to cooperate with the guide to adjust the distance between the first measuring head 3 and the second measuring head 4, which can avoid slight tilt during the measurement process, thereby causing large diameter measurement errors, poor consistency of repeated measurements, and difficulty in achieving accurate measurement of special-shaped deep grooves.

[0047] It should be noted that the special detection device for special-shaped deep grooves in this embodiment is a quick-detachable structure. By exchanging the installation positions of the elastic telescopic rod 8 and the dial indicator 9, and then replacing the corresponding measuring head or turning the direction of the measuring head, and matching special standard parts, the measurement of the diameters of corresponding special-shaped outer diameter grooves, inner holes, outer circles, etc. can be achieved.

[0048] The above are only preferred embodiments of the present invention and are 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 special detection device for special-shaped deep grooves, characterized in that: include: A base (1), wherein a sliding guide assembly (2) is provided on the base (1); A first measuring head (3), wherein the first measuring head (3) is mounted on the base (1); a second measuring head (4), the second measuring head (4) being arranged in parallel with the first measuring head (3); the second measuring head (4) being movably mounted on the sliding guide assembly (2) via a first mounting seat (5), the first mounting seat (5) being provided with a first locking screw (6) which can cooperate with the movable guide assembly and is used to adjust and limit the distance between the second measuring head (4) and the first measuring head (3); a second mounting seat (7), the second mounting seat (7) being fixed on the base (1), and the second mounting seat (7) being located between the first mounting seat (5) and the first measuring head (3); the second mounting seat (7) being provided with an elastic telescopic rod (8) capable of abutting against the first mounting seat (5) and being used for applying a pressing force to the first mounting seat (5); A dial gauge (9), wherein the dial gauge (9) is mounted on a base (1) via a fixed support (10), the elastic telescopic rod (8) and a measuring probe of the dial gauge (9) are coaxially arranged, and the elastic telescopic rod (8) and the measuring probe of the dial gauge (9) are respectively located on two sides of a first mounting seat (5).

2. The special detection device for special-shaped deep grooves according to claim 1 is characterized in that: The first mounting seat (5) is provided with a mounting hole parallel to the first measuring head (3), the second measuring head (4) is inserted into the mounting hole, and the first mounting seat (5) is provided with a second locking screw (11) which can abut against the outer wall of the second measuring head (4) in the mounting hole and is used to adjust and limit the extension of the second measuring head (4) relative to the first mounting seat (5).

3. The special detection device for special-shaped deep grooves according to claim 1 is characterized in that: The base (1) is provided with a guide groove (12), a third mounting seat (13) is movably mounted in the guide groove (12), and the first measuring head (3) is movably mounted on the base (1) via the third mounting seat (13); the base (1) is provided with a third locking screw (14) which can cooperate with the third mounting seat (13) and is used to adjust and limit the distance between the first measuring head (3) and the second measuring head (4).

4. The special detection device for special-shaped deep grooves according to claim 1 is characterized in that: The elastic telescopic rod (8) comprises a cylinder (801) fixed on the second mounting seat (7), a force transmission rod (802) is inserted into the cylinder (801), one end of the force transmission rod (802) is in contact with the first mounting seat (5), and the other end of the force transmission rod (802) is located in the inner cavity of the cylinder (801); an adjusting screw (803) is installed on the end of the cylinder (801) away from the force transmission rod (802) through an internal thread, and a compressed spring (804) is arranged between the adjusting screw (803) and the force transmission rod (802).

5. The special detection device for special-shaped deep grooves according to claim 1, characterized in that: The sliding guide assembly (2) comprises a sliding bar arranged on the base (1), and the first mounting seat (5) is provided with a sliding groove matching the sliding bar.

6. A special detection method for special-shaped deep grooves, the method is based on the special detection device for special-shaped deep grooves according to claim 1, characterized in that: include: According to the structure and diameter range of the special-shaped deep groove (17) to be measured, a standard part (15) with a corresponding inner diameter is selected; Using a height equalization block (16), the special detection device for the irregular deep groove to be detected is horizontally placed above the standard part (15), the relative position of the first mounting seat (5) and the first measuring head (3) is adjusted, and the first measuring head (3) and the second measuring head (4) are brought into contact with the inner wall of the groove of the standard part (15), and the first measuring head (3) and the second measuring head (4) are respectively located at the theoretical diameter end position of the groove of the standard part (15); Return the pointer of the dial indicator (9) to zero, then place the special detection device for the special-shaped deep groove (17) to be measured in a position parallel to the notch of the special-shaped deep groove (17) to be measured, and make the first measuring head (3) and the second measuring head (4) abut against the inner wall of the special-shaped deep groove (17) to be measured, and adjust the elastic telescopic rod (8) so that the elastic telescopic rod (8) generates a pressing force on the first mounting seat (5); The size of the special-shaped deep groove (17) to be measured is calculated based on the value read from the dial gauge (9) and the actual size of the groove of the standard part (15).

7. The special detection method for irregular deep grooves according to claim 6, characterized in that: The elastic telescopic rod (8) comprises a cylinder (801) fixed on the second mounting seat (7), a force transmission rod (802) is inserted into the cylinder (801), one end of the force transmission rod (802) is in contact with the first mounting seat (5), and the other end of the force transmission rod (802) is located in the inner cavity of the cylinder (801); an adjusting screw (803) is installed on the end of the cylinder (801) away from the force transmission rod (802) through an internal thread, and a compressed spring (804) is arranged between the adjusting screw (803) and the force transmission rod (802); the pressing force of the elastic telescopic rod (8) on the first mounting seat (5) is adjusted by rotating the elongation of the adjusting screw (803) in the cylinder (801), so that the pressing force F of the elastic telescopic rod (8) on the first mounting seat (5) is equal to (m1+1.5m2)g+F o +F1, where m1 is the mass of the first mounting seat (5), m2 is the mass of the force transmission rod (802), g is the acceleration due to gravity, and F o is the compression elastic force of the dial gauge (9), and F1 is the minimum stress for elastic bending deformation of the force transmission rod (802) after being compressed.

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