Volute double-table orientation reference measurement device and measurement method

Abstract

This invention relates to a dual-dial dial indicator directional reference measuring device and method for a volute housing. It includes a base, a threaded bolt seat for turning direction, a threaded bolt for turning direction, a pressure head mounting seat, a pressure head, a dial indicator base, first and second dial indicators, a workpiece placement chassis, a positioning core, a spring, a bottom cover, a dual-dial calibration block placement block, and a dual-dial calibration block itself. The workpiece placement chassis includes a workpiece placement chassis body, a mounting recess for the positioning core body, a workpiece placement chassis fixing column, and mounting holes for the positioning core mounting column. The positioning core includes a positioning core body, a positioning conical surface, and a positioning core mounting column. The measuring method includes machining the dual-dial calibration block, installing the first and second dial indicators, calibrating the first and second dial indicators, measuring the volute housing sample, measuring the volute housing to be measured, and data comparison and judgment steps. This invention provides convenient measurement, facilitates on-site quality control, saves the measurement resources of a coordinate measuring machine (CMM), thereby saving time and indirectly saving manpower and material resources.

Description

Technical Field

[0001] This invention relates to the field of vortex shell measurement technology, and specifically discloses a vortex shell dual-gauge orientation reference measurement device and measurement method. Background Technology

[0002] The dimensions from the center projection point of the exhaust port to the positioning surface at the back angle of the nozzle during the initial rough machining of the volute casing require data to control tool compensation. Initially, only a small plane at the back angle is machined for the volute casing orientation point. This small plane determines the orientation, but the coordinate measuring machine's measurement is inaccurate, causing subsequent positioning machining to affect the alignment and position of the intermediate shell.

[0003] Therefore, it is necessary to mill two surfaces of the volute back angle. When measuring with a coordinate measuring machine, a straight line is drawn between the two surfaces as a directional reference. This method is more accurate, but changing tools and sending them for inspection on-site is time-consuming, laborious, and inconvenient. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a convenient and on-site quality control vortex shell dual-gauge orientation reference measuring device and method.

[0005] According to the technical solution provided by the present invention, the vortex shell dual-dial orientation reference measuring device includes a base, a screw direction threaded bolt seat, a screw direction threaded bolt, a pressure head mounting seat, a pressure head, a dial indicator seat, a first dial indicator, a second dial indicator, a workpiece placement chassis, a positioning core, a spring, a bottom cover, a dual-dial calibration block placement block, and a dual-dial calibration block. The workpiece placement chassis includes a workpiece placement chassis body and a workpiece placement chassis fixing column body integrally connected to the bottom of the workpiece placement chassis body. The workpiece placement chassis body is a short cylinder. A cylindrical positioning core body mounting recess is provided on the workpiece placement chassis body, and a cylindrical positioning core mounting column mounting hole is provided on the workpiece placement chassis fixing column body. The positioning core includes a positioning core body and a positioning core mounting post integrally connected to the bottom of the positioning core body. The positioning core body is a short cylinder, and a positioning conical surface is provided at the upper end of the positioning core body. The base has mounting holes for workpiece placement chassis fixing columns. A workpiece placement chassis fixing column is installed in the mounting holes, with a clearance fit between the workpiece placement chassis fixing column and the mounting holes. A positioning core mounting column is installed in the mounting holes, with a clearance fit between the positioning core mounting column and the mounting holes. The positioning core body is also clearance-fitted to the mounting recess. A spring is provided on the outside of the positioning core mounting column. The upper end of the spring abuts against the lower surface of the positioning core body, and the lower end of the spring abuts against the bottom surface of the mounting recess. A bottom cover is installed at the lower end of the positioning core mounting column. The diameter of the bottom cover is larger than the diameter of the mounting holes. A dial indicator base is fixed on the upper surface of the base outside the corresponding workpiece placement chassis, and a first dial indicator and a second dial indicator are installed on the dial indicator base; a screw-in direction threaded bolt seat is fixed on the upper surface of the base to the left of the corresponding dial indicator base, and a screw-in direction threaded bolt is installed in the screw-in direction threaded bolt seat. A pressure head mounting base and a dual-gauge calibration block placement block are fixed on the upper surface of the base. A pressure head is installed at the upper end of the pressure head mounting base. A dual-gauge calibration block placement slot is provided on the dual-gauge calibration block placement block. The dual-gauge calibration block is placed in the dual-gauge calibration block placement slot. The dual-gauge calibration block has a first calibration plane and a second calibration plane, which are arranged in parallel.

[0006] Preferably, a groove is provided at the upper end of the workpiece placement chassis body portion.

[0007] The method for performing orientation reference measurement of a vortex shell using the above-described apparatus includes the following steps: S1. Based on the height difference between the first reference plane and the second reference plane of the lower back angle of the finished volute, process the first calibration plane and the second calibration plane of the dual-dial calibration block, so that the first calibration plane and the second calibration plane are parallel and the height difference between the first calibration plane and the second calibration plane on the dual-dial calibration block is equal to the height difference between the first reference plane and the second reference plane of the lower back angle of the finished volute. S2. Install the first and second dial indicators on the indicator base; S3. Use the first and second calibration planes on the dual-indicator calibration block to calibrate the distances of the probes of the first and second dial indicators extending out of the base, so that the distances of the probes of the first and second dial indicators extending out of the base are equal to the height difference between the first and second calibration planes on the dual-indicator calibration block. S4. Take a volute sample that has been measured by a coordinate measuring machine. The height difference between the first and second reference surfaces of the lower back angle of the volute sample is equal to the height difference between the first and second reference surfaces of the lower back angle of the finished volute. Place the air outlet end face of the volute sample on the upper end face of the workpiece placement chassis body. Position the air outlet of the volute sample by the positioning cone face at the upper end of the positioning core body. Press the pressure head against the middle shell connection end face of the volute sample. Tighten the screw thread bolt. The working end of the screw thread bolt drives the volute sample to rotate around its air outlet axis, so that the first and second reference surfaces of the lower back angle of the volute sample gradually approach and contact the probes of the first and second dial indicators. When the readings of the first and second dial indicators are the same, stop tightening the screw thread bolt and record the readings. S5. Remove the volute sample and place the air outlet end face of the volute to be tested on the upper end face of the workpiece placement base body. Position the air outlet of the volute to be tested using the positioning cone surface at the upper end of the positioning core body. Press the pressure head against the middle shell connection end face of the volute to be tested. Tighten the screw thread bolt. The working end of the screw thread bolt drives the volute to be tested to rotate around its air outlet axis, so that the first reference surface and the second reference surface of the lower back angle of the volute to be tested gradually approach and contact the probe of the first dial indicator and the probe of the second dial indicator. When the reading of the first dial indicator is the same as the reading of the second dial indicator, stop tightening the screw thread bolt and record the reading. S6. If the index obtained in step S5 is within the tolerance range of the index obtained in step S4, it means that the height difference between the first reference plane and the second reference plane of the lower back angle of the volute under test meets the design requirements; if the index obtained in step S5 exceeds the tolerance range of the index obtained in step S4, it means that the height difference between the first reference plane and the second reference plane of the lower back angle of the volute under test does not meet the design requirements.

[0008] This invention is convenient for measurement and beneficial for on-site quality control; it saves the measurement resources of a coordinate measuring machine, thereby saving time and indirectly saving manpower and material resources. Attached Figure Description

[0009] Figure 1 This is a front view of the vortex shell dual-gauge orientation reference measuring device of the present invention after the pressure head mounting base has been removed.

[0010] Figure 2 yes Figure 1 AA sectional view.

[0011] Figure 3 yes Figure 2 Enlarged view of section B.

[0012] Figure 4This is a perspective view of the vortex-shell dual-gauge orientation reference measuring device of the present invention.

[0013] Figure 5 This is one of the three-dimensional images of the volute to be tested.

[0014] Figure 6 This is the second three-dimensional image of the volute to be tested.

[0015] Figure 7 This is a diagram showing the usage status of the vortex shell dual-gauge orientation reference measuring device in this invention.

[0016] Figure 8 yes Figure 7 Enlarged view of section C. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] The vortex-shell dual-gauge orientation reference measuring device of the present invention, such as Figures 1-4 As shown, it includes a base 1, a screw threaded bolt seat 2, a screw threaded bolt 3, a pressure head mounting seat 4, a pressure head 5, a gauge base 6, a first dial indicator 7.1, a second dial indicator 7.2, a workpiece placement chassis 8, a positioning core 9, a spring 10, a bottom cover 11, a dual-gauge calibration block placement block 12, and a dual-gauge calibration block 13. The pressure head 5 is a commercially available standard product. The workpiece placement chassis 8 includes a workpiece placement chassis body part 8.1 and a workpiece placement chassis fixing column part 8.2 integrally connected to the bottom of the workpiece placement chassis body part 8.1. The workpiece placement chassis body part 8.1 is a short cylinder. A cylindrical positioning core body part mounting recess 8.11 is provided on the workpiece placement chassis body part 8.1. A cylindrical positioning core mounting column part mounting hole 8.21 is provided on the workpiece placement chassis fixing column part 8.2. The positioning core 9 includes a positioning core body part 9.1 and a positioning core mounting post part 9.2 integrally connected to the bottom of the positioning core body part 9.1. The positioning core body part 9.1 is a short cylinder, and a positioning conical surface 9.11 is provided at the upper end of the positioning core body part 9.1. The base 1 has a workpiece placement chassis fixing column mounting hole 1.1. A workpiece placement chassis fixing column portion 8.2 is installed in the workpiece placement chassis fixing column mounting hole 1.1, with a clearance fit between the workpiece placement chassis fixing column portion 8.2 and the workpiece placement chassis fixing column mounting hole 1.1. A positioning core mounting column portion 9.2 is installed in the positioning core mounting column portion mounting hole 8.21, with a clearance fit between the positioning core mounting column portion 9.2 and the positioning core mounting column portion mounting hole 8.21. The positioning core body 9.1 and the mounting recess 8.11 of the positioning core body are in clearance fit. A spring 10 is provided on the outside of the positioning core mounting post 9.2. The upper end of the spring 10 abuts against the lower surface of the positioning core body 9.1, and the lower end of the spring 10 abuts against the bottom surface of the mounting recess 8.11 of the positioning core body. A bottom cover 11 is installed at the lower end of the positioning core mounting post 9.2. The diameter of the bottom cover 11 is larger than the diameter of the mounting hole 8.21 of the positioning core mounting post. A dial indicator 6 is fixed on the upper surface of the base 1 outside the workpiece placement chassis 8. A first dial indicator 7.1 and a second dial indicator 7.2 are installed on the dial indicator 6. A screw-in direction threaded bolt seat 2 is fixed on the upper surface of the base 1 to the left of the dial indicator 6. A screw-in direction threaded bolt 3 is installed inside the screw-in direction threaded bolt seat 2. A pressure head mounting base 4 and a dual-meter calibration block placement block 12 are fixed on the upper surface of the base 1. A pressure head 5 is installed at the upper end of the pressure head mounting base 4. A dual-meter calibration block placement slot is provided on the dual-meter calibration block placement block 12. The dual-meter calibration block 13 is placed in the dual-meter calibration block placement slot. The dual-meter calibration block 13 has a first calibration plane and a second calibration plane, which are arranged in parallel.

[0019] A groove 8.12 is provided at the upper end of the workpiece placement chassis body part 8.1.

[0020] In this invention, after the air outlet end face of the finished volute is placed on the operating table, the reference surface milled on the lower back corner away from the center of the air outlet of the finished volute is the first reference surface, and the reference surface milled on the lower back corner close to the center of the air outlet of the finished volute is the second reference surface.

[0021] In this invention, after placing the air outlet end face of the volute sample on the operating table, the reference surface milled on the lower back corner away from the center of the air outlet of the volute sample is the first reference surface, and the reference surface milled on the lower back corner close to the center of the air outlet of the volute sample is the second reference surface.

[0022] In this invention, after the air outlet end face of the volute 100 to be tested is placed on the upper end face of the workpiece placement chassis body part 8.1, the reference surface milled on the lower back corner away from the center of the air outlet of the volute 100 to be tested is the first reference surface 100.1, and the reference surface milled on the lower back corner close to the center of the air outlet of the volute 100 to be tested is the second reference surface 100.2.

[0023] The method for performing orientation reference measurement of a vortex shell using the above-described apparatus includes the following steps: S1. Based on the height difference between the first reference plane and the second reference plane of the lower back angle of the finished volute, (the height difference can also be 0), process the first calibration plane and the second calibration plane of the dual-dial calibration block 13, so that the first calibration plane and the second calibration plane are parallel and the height difference between the first calibration plane and the second calibration plane on the dual-dial calibration block 13 is equal to the height difference between the first reference plane and the second reference plane of the back angle of the finished volute. S2. Install the first dial indicator 7.1 and the second dial indicator 7.2 on the base 6; S3. Use the first and second calibration planes on the dual-gauge calibration block 13 to calibrate the distances from which the probes of the first dial indicator 7.1 and the second dial indicator 7.2 extend beyond the base 6, so that the distances from which the probes of the first dial indicator 7.1 and the second dial indicator 7.2 extend beyond the base 6 are equal to the height difference between the first and second calibration planes on the dual-gauge calibration block 13. S4. Take a volute sample that has been measured by a coordinate measuring machine. The height difference between the first reference surface and the second reference surface of the lower back angle of the volute sample is equal to the height difference between the first reference surface and the second reference surface of the lower back angle of the finished volute. Place the air outlet end face of the volute sample on the upper end face of the workpiece placement chassis body 8.1. Position the air outlet of the volute sample by the positioning cone surface 9.11 at the upper end of the positioning core body 9.1. Press the pressure head 5 against the middle shell connection end face of the volute sample. Tighten the screw thread 3. The working end of the screw thread 3 drives the volute sample to rotate around its air outlet axis, so that the first reference surface and the second reference surface of the lower back angle of the volute sample gradually approach and contact the probe of the first dial indicator 7.1 and the probe of the second dial indicator 7.2. When the index of the first dial indicator 7.1 is the same as the index of the second dial indicator 7.2, stop turning the screw thread 3 and record the index. S5. Remove the volute sample, and then... Figure 5 and Figure 6The air outlet end face of the volute 100 to be tested is placed on the upper end face of the workpiece placement base body 8.1. The position of the air outlet of the volute 100 to be tested is located by the positioning cone surface 9.11 at the upper end of the positioning core body 9.1. The pressure head 5 is pressed against the middle shell connection end face of the volute 100 to be tested. The screw thread 3 is turned, and the working end of the screw thread 3 drives the volute 100 to be tested to rotate around its air outlet axis, so that the first reference surface 100.1 and the second reference surface 100.2 of the lower back angle of the volute 100 to be tested gradually approach and contact the probes of the first dial indicator 7.1 and the second dial indicator 7.2. When the readings of the first dial indicator 7.1 and the second dial indicator 7.2 are the same, the screw thread 3 is stopped and the readings are recorded. Figure 7 and Figure 8 As shown; S6. If the index obtained in step S5 is within the tolerance range of the index obtained in step S4, it means that the height difference between the first reference surface 100.1 and the second reference surface 100.2 of the lower back angle of the volute 100 under test meets the design requirements; if the index obtained in step S5 exceeds the tolerance range of the index obtained in step S4, it means that the height difference between the first reference surface 100.1 and the second reference surface 100.2 of the lower back angle of the volute 100 under test does not meet the design requirements.

Claims

1. A volute-type dual-gauge orientation reference measuring device, characterized in that: It includes a base (1), a screw thread seat (2), a screw thread (3), a pressure head mounting seat (4), a pressure head (5), a gauge base (6), a first dial indicator (7.1), a second dial indicator (7.2), a workpiece placement chassis (8), a positioning core (9), a spring (10), a bottom cover (11), a double worm gauge calibration block placement block (12), and a double gauge calibration block (13); The workpiece placement chassis (8) includes a workpiece placement chassis body part (8.1) and a workpiece placement chassis fixing column part (8.2) integrally connected to the bottom of the workpiece placement chassis body part (8.1). The workpiece placement chassis body part (8.1) is a short cylinder. A cylindrical positioning core body part mounting recess (8.11) is provided on the workpiece placement chassis body part (8.1), and a cylindrical positioning core mounting column part mounting hole (8.21) is provided on the workpiece placement chassis fixing column part (8.2). The positioning core (9) includes a positioning core body part (9.1) and a positioning core mounting post part (9.2) integrally connected to the bottom of the positioning core body part (9.1). The positioning core body part (9.1) is a short cylinder, and a positioning conical surface (9.11) is provided at the upper end of the positioning core body part (9.1). The base (1) has a workpiece placement chassis fixing column mounting hole (1.1). A workpiece placement chassis fixing column part (8.2) is installed in the workpiece placement chassis fixing column mounting hole (1.1). The workpiece placement chassis fixing column part (8.2) and the workpiece placement chassis fixing column mounting hole (1.1) are clearance fit. A positioning core mounting column part (9.2) is installed in the positioning core mounting column part mounting hole (8.21). The positioning core mounting column part (9.2) and the positioning core mounting column part mounting hole (8.21) are clearance fit. The positioning core body part (9.1) and the positioning core body part mounting recess (8.11) are in clearance fit. A spring (10) is provided on the outside of the positioning core mounting post part (9.2). The upper end of the spring (10) abuts against the lower surface of the positioning core body part (9.1), and the lower end of the spring (10) abuts against the bottom surface of the positioning core body part mounting recess (8.11). A bottom cover (11) is installed at the lower end of the positioning core mounting post part (9.2). The diameter of the bottom cover (11) is larger than the diameter of the mounting hole (8.21) of the positioning core mounting post part. A dial indicator (6) is fixed on the upper surface of the base (1) outside the corresponding workpiece placement chassis (8), and a first dial indicator (7.1) and a second dial indicator (7.2) are installed on the dial indicator (6); a screw-in direction threaded bolt seat (2) is fixed on the upper surface of the base (1) to the left of the corresponding dial indicator (6), and a screw-in direction threaded bolt (3) is installed inside the screw-in direction threaded bolt seat (2); A pressure head mounting base (4) and a dual-meter calibration block placement block (12) are fixed on the upper surface of the base (1). A pressure head (5) is installed at the upper end of the pressure head mounting base (4). A dual-meter calibration block placement slot is provided on the dual-meter calibration block placement block (12). The dual-meter calibration block (13) is placed in the dual-meter calibration block placement slot. The dual-meter calibration block (13) has a first calibration plane and a second calibration plane, which are arranged in parallel.

2. The volute dual-gauge orientation reference measuring device as described in claim 1, characterized in that: A groove (8.12) is provided at the upper end of the workpiece placement chassis body part (8.1).

3. A method for measuring the orientation reference of a volute using the apparatus according to any one of claims 1 or 2, characterized in that: The method includes the following steps: S1. Based on the height difference between the first reference plane and the second reference plane of the lower back angle of the finished volute, process the first calibration plane and the second calibration plane of the double-dial calibration block (13) so that the first calibration plane and the second calibration plane are parallel and the height difference between the first calibration plane and the second calibration plane on the double-dial calibration block (13) is equal to the height difference between the first reference plane and the second reference plane of the lower back angle of the finished volute. S2. Install the first dial indicator (7.1) and the second dial indicator (7.2) on the base (6); S3. Use the first and second calibration planes on the dual-gauge calibration block (13) to calibrate the distances from which the probes of the first dial indicator (7.1) and the second dial indicator (7.2) extend out of the base (6), so that the distances from which the probes of the first dial indicator (7.1) and the second dial indicator (7.2) extend out of the base (6) are equal to the height difference between the first and second calibration planes on the dual-gauge calibration block (13). S4. Take the volute sample that has been measured by a coordinate measuring machine. The height difference between the first reference plane and the second reference plane of the lower back angle of the volute sample is equal to the height difference between the first reference plane and the second reference plane of the lower back angle of the finished volute. Place the air outlet end face of the volute sample on the upper end face of the workpiece placement base body (8.1). Position the air outlet of the volute sample by the positioning cone surface (9.11) at the upper end of the positioning core body (9.1). Press the pressure head (5) down. Tighten the screw thread (3) on the end face of the middle shell connection of the volute sample, and turn the screw thread (3). The working end of the screw thread (3) drives the volute sample to rotate around its outlet axis, so that the first reference surface and the second reference surface of the lower back angle of the volute sample gradually approach and contact the probe of the first dial indicator (7.1) and the probe of the second dial indicator (7.2). When the index of the first dial indicator (7.1) is the same as the index of the second dial indicator (7.2), stop turning the screw thread (3) and record the index. S5. Remove the volute sample and place the air outlet end face of the volute (100) to be tested on the upper end face of the workpiece placement base body (8.1). Position the air outlet of the volute (100) to be tested using the positioning cone surface (9.11) at the upper end of the positioning core body (9.1). Press the pressure head (5) against the middle shell connection end face of the volute (100) to be tested, and turn the screw thread (3) to the working position of the screw thread (3). The working end drives the volute (100) under test to rotate around its air outlet axis, so that the first reference surface (100.1) and the second reference surface (100.2) of the lower back angle of the volute (100) under test gradually approach and contact the probe of the first dial indicator (7.1) and the probe of the second dial indicator (7.2). When the index of the first dial indicator (7.1) is the same as the index of the second dial indicator (7.2), stop turning the screw bolt (3) and record the index. S6. If the index obtained in step S5 is within the tolerance range of the index obtained in step S4, it means that the height difference between the first reference plane (100.1) and the second reference plane (100.2) of the lower back angle of the volute (100) under test meets the design requirements; if the index obtained in step S5 exceeds the tolerance range of the index obtained in step S4, it means that the height difference between the first reference plane (100.1) and the second reference plane (100.2) of the lower back angle of the volute (100) under test does not meet the design requirements.

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