Pressure Sensor Processing Tooling

Abstract

The present invention discloses a processing tooling for a pressure sensor, which includes a base pedestal and a base support plate. At least one support stud is erected between the base pedestal and the base support plate. A lower fixture shaft is installed on the base pedestal, and an upper fixture shaft is movably installed at the bottom of the base support plate. The lower fixture shaft and the upper fixture shaft are coaxially arranged. The clamping end of the lower diaphragm seat on the lower fixture shaft faces the clamping end of the upper diaphragm seat on the upper fixture shaft. A diaphragm fixture mounting position is provided on the lower fixture shaft. A welding torch is arranged between the base pedestal and the base support plate. The rejection rate of the pressure sensor is reduced, and the detection accuracy of the pressure sensor is improved. Moreover, the errors of the pressure sensors processed by the same tooling are basically the same. When calibrating the pressure sensors, calibration can also be carried out uniformly, improving the calibration accuracy and ensuring the quality of the products leaving the factory.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure sensor processing, and specifically, it is a processing tool for pressure sensors. Background Art

[0002] A pressure sensor includes two diaphragm seats and a diaphragm, and during pressure detection, the deformation of the diaphragm is detected. During the processing, it is necessary to ensure that the axis lines of the two diaphragm seats are coaxial, and the diaphragm needs to be placed flatly between the two diaphragm seats. In the existing processing technology, manual alignment or even alignment components are mostly used for alignment. However, due to the still existing deviation in alignment accuracy, the two diaphragm seats are not coaxial. Even during the processing, the deviation is extremely small, but for sensors with a large range, the deviation is also extremely large. And for the high-precision field, the accuracy of the produced pressure sensors cannot meet the industrial requirements.

[0003] Moreover, the deviation of each processed sensor is different. When calibrating, there is no calibration standard, resulting in a high calibration workload and unable to meet the requirements of high-efficiency production.

[0004] During the processing, there are processes of diaphragm cutting and welding, which easily cause the diaphragm to become loose and offset. Even if it is tiny, it will affect the inspection accuracy of the pressure sensor.

[0005] Based on the above defects, it is necessary to propose a processing tool to overcome the above technical problems. Summary of the Invention

[0006] In order to solve the above problems, the present invention proposes a processing tool for pressure sensors. Through the coaxial lower fixture shaft and upper fixture shaft, when processing the diaphragm seats, the upper and lower diaphragm seats are respectively clamped by the clamping ends and then fixed coaxially for welding, ensuring that the upper and lower diaphragm seats always remain coaxial during the processing, enabling the welding processing to be completed within the error range, and facilitating unified calibration in the later stage.

[0007] To achieve the above object, the specific technical solution adopted by the present invention is as follows:

[0008] A processing tool for pressure sensors, the key technology of which lies in: including a base base and a base support plate, at least one support stud is erected between the base base and the base support plate, a lower fixture shaft is installed on the base base, the bottom of the base support plate is movably installed with an upper fixture shaft, the lower fixture shaft and the upper fixture shaft are coaxially arranged, the lower diaphragm seat clamping end of the lower fixture shaft faces the upper diaphragm seat clamping end of the upper fixture shaft, a diaphragm fixture installation position is arranged on the lower fixture shaft, and a welding torch is arranged between the base base and the base support plate.

[0009] With the above solution, the lower fixture shaft and the upper fixture shaft are coaxially arranged, and the upper and lower membrane seats are respectively fixed to their membrane seat clamping ends. When the movable upper fixture shaft carries the upper membrane seat close to the lower membrane seat, the upper and lower membrane seats can still remain coaxial all the time. And the movable upper fixture shaft can change the acting force between the upper and lower membrane seats, so that the diaphragm can be firmly clamped between the upper and lower membrane seats. Even during cutting and welding, the diaphragm will not become loose. This effectively reduces the rejection rate of the pressure sensor and improves the detection accuracy of the pressure sensor. Moreover, the pressure sensors processed by the same tooling have basically the same error. When calibrating the pressure sensors, they can also be calibrated uniformly, improving the calibration accuracy and ensuring the quality of the products leaving the factory.

[0010] In a further technical solution, an upper membrane seat installation groove is formed on the end face of the membrane seat clamping end of the upper fixture shaft, and a magnetic block is fixed to the top of the upper membrane seat installation groove.

[0011] With the above magnetic block, after the upper membrane seat is placed in the upper membrane seat installation groove, the magnetic block can suck the membrane seat to prevent it from falling down, without the need for other fixing devices. This makes the processing more convenient. After welding is completed, the staff can quickly remove the processed pressure sensor.

[0012] In a still further technical solution, a diaphragm cutting tool installation position is provided on the outer wall of the membrane seat clamping end of the upper fixture shaft.

[0013] With the above solution, the cutting tool can be installed on the upper fixture shaft to cut the diaphragm that extends beyond the edge of the membrane seat, so as to carry out the subsequent welding process. The cutting tool installation position can be a thread, a pin hole, etc.

[0014] In a still further technical solution, one end of the upper fixture shaft away from the membrane seat clamping end is sleeved in the upper bearing seat, the upper bearing seat is fixed to the upper fixture shaft fixing position of the guiding sliding sleeve, the guiding sliding sleeve is connected to the oil cylinder output shaft of the hydraulic cylinder, the upper fixture shaft is coaxially arranged with the oil cylinder output shaft, and the hydraulic cylinder is fixed to the base support plate.

[0015] With the above solution, the oil cylinder output shaft of the hydraulic cylinder drives the upper fixture shaft to move up and down, thereby carrying the upper membrane seat close to the lower membrane seat. And the hydraulic cylinder adopts a 16Mpa 12-ton special hydraulic cylinder, so that the diaphragm can be firmly fixed between the upper and lower membrane seats, effectively preventing the diaphragm between the membrane seats from deforming, loosening and being damaged during the diaphragm cutting and welding processes. And the guiding sliding sleeve can limit the upper fixture shaft from shaking and deviating during the moving process, so as to ensure that when the upper membrane seat descends to the lower membrane seat, the two still remain coaxial.

[0016] In a further technical solution, guide through holes are symmetrically arranged at both end portions of the fixed position of the upper fixture shaft of the guide sliding sleeve. A fixture column is sleeved in each of the two guide through holes. The axis of the fixture column is parallel to the axis of the upper fixture shaft. The two fixture columns are fixed between the base bottom and the base support plate.

[0017] With the above solution, the fixture column is inserted into the guide through hole. The fixture column is parallel to the upper fixture shaft and the lower fixture shaft. In combination with the guide sliding sleeve, when the hydraulic cylinder drives the upper fixture shaft on the guide sliding sleeve to descend, the guide sliding sleeve sleeved on the fixture column can only move along the extending direction of the fixture column, and the direction is fixed, so that the upper membrane seat will not shift laterally. Ensure that when the upper membrane seat descends to the lower membrane seat, the two still remain coaxially arranged.

[0018] In a further technical solution, a welding torch fixture is fixed on any one of the fixture columns. The welding torch fixture is used to connect the welding torch.

[0019] The upper and lower membrane seats and the membrane are welded together by a welding torch to form an integrally formed pressure sensor. The welding torch is directed at the top of the lower membrane seat.

[0020] In a further technical solution, a lower membrane seat installation groove is formed on the end face of the lower membrane seat clamping end of the lower fixture shaft. The lower fixture shaft is sleeved in a lower bearing seat. The lower bearing seat is fixed on the base bottom. The side of the lower bearing seat close to the end of the lower fixture shaft away from the lower membrane seat clamping end is set as the membrane fixture installation position. One end of the lower fixture shaft away from the lower membrane seat clamping end passes through the lower bearing seat and the base bottom and then connects to a lower fixture shaft rotation driving component.

[0021] With the above solution, during the processing, the lower membrane seat is placed in the lower membrane seat installation groove, and during the descent of the upper membrane seat, the lower membrane seat remains stationary, so that the upper and lower membrane seats clamp the membrane in the middle. Among them, the membrane is placed on the top of the lower membrane seat by a membrane fixture, and the edge of the membrane is clamped by the membrane fixture and forms tension. After the upper membrane seat descends, the membrane is fixed and clamped between the upper and lower membrane seats. After cutting, welding is carried out under the drive of the lower fixture shaft rotation driving component. During the welding process, the upper fixture shaft remains stationary.

[0022] In a further technical solution, the lower fixture shaft rotation driving component includes a rotation motor. A driving gear is connected to the output shaft of the rotation motor. One end of the lower fixture shaft away from the lower membrane seat clamping end is connected to a driven gear. The driving gear and the driven gear are meshed.

[0023] With the above solution, the rotation motor drives the lower fixture shaft to rotate.

[0024] A further technical solution is that a fixture bottom plate is further fixed on the base bottom seat, and the lower bearing seat sleeving the lower fixture shaft is fixed on the base bottom seat through the fixture bottom plate; a fixture support plate is fixed at the bottom of the base support plate, and both ends of the fixture column between the base bottom seat and the base support plate are respectively fixed through the fixture bottom plate and the base support plate.

[0025] By adopting the above scheme, the fixture column can be conveniently fixed between the base bottom seat and the base support plate.

[0026] A further technical solution is that the base bottom seat is fixed on the tooling base, and at least 4 tooling base foot balance seats are further arranged at the bottom of the tooling base.

[0027] The beneficial effects of the present invention are as follows: Through the coaxial lower fixture shaft and upper fixture shaft, when processing the film seat, the upper and lower film seats are respectively clamped through the clamping ends and then fixed coaxially for welding, ensuring that the upper and lower film seats always remain coaxially during the processing, enabling the welding processing to be completed within the error range, and being convenient for subsequent unified calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic three-dimensional structure of the present invention Figure 1 ;

[0029] Figure 2 is a schematic three-dimensional structure of the present invention Figure 2 ;

[0030] Figure 3 is a side view of the present invention;

[0031] Figure 4 is Figure 3 a schematic cross-sectional view taken along line B-B in

[0032] Figure 5 Figure 4 an enlarged schematic view of A in

[0033] Figure 6 is a schematic connection and installation view of the upper fixture shaft;

[0034] Figure 7 is a schematic structural view of the fixture shaft rotation drive assembly. DETAILED DESCRIPTION OF THE INVENTION

[0035] The following further details the specific implementation manners and working principles of the present invention with reference to the accompanying drawings.

[0036] A pressure sensor processing tooling, from Figures 1-3It can be seen that it includes a base pedestal 1a and a base support plate 1b. Four support studs 2 are erected between the base pedestal 1a and the base support plate 1b. A lower clamp shaft 3 is installed on the base pedestal 1a. An upper clamp shaft 4 is movably installed at the bottom of the base support plate 1b. The lower clamp shaft 3 and the upper clamp shaft 4 are coaxially arranged. The clamping end of the lower film seat on the lower clamp shaft 3 faces the clamping end of the upper film seat on the upper clamp shaft 4. A diaphragm clamp mounting position is provided on the lower clamp shaft 3. Among them, the diaphragm clamp is not shown in the figure. A welding torch is provided between the base pedestal 1a and the base support plate 1b.

[0037] In this embodiment, the base pedestal 1a is fixed on the tooling base 12, and four tooling base foot balance seats 13 are further provided at the bottom of the tooling base 12. For specific reference, see Figures 1-3 .

[0038] In this embodiment, combined with Figure 4 It can be seen that a clamp bottom plate 14b is also fixed on the base pedestal 1a. The lower bearing seat 9 sleeving the lower clamp shaft 3 is fixed on the base pedestal 1a through the clamp bottom plate 14b;

[0039] A clamp support plate 14a is fixed at the bottom of the base support plate 1b. Both ends of the clamp column 8 between the base pedestal 1a and the base support plate 1b are fixed through the clamp bottom plate 14b and the base support plate 1b respectively.

[0040] Combined with Figure 5 It can be seen that an upper film seat mounting groove 4a is provided on the end face of the clamping end of the upper film seat on the upper clamp shaft 4, and a magnet 4b is fixed at the top of the upper film seat mounting groove 4a. After the upper film seat is placed in the upper film seat mounting groove 4a, since the upper film seat is made of metal, the magnet has an attractive force on the upper film seat, and the magnitude of the attractive force is greater than the gravity of the magnet. In this embodiment, the inner diameter of the upper film seat mounting groove is adapted to the outer diameter of the upper film seat. The difference between the inner diameter value of the upper film seat mounting groove and the outer diameter value of the upper film seat is within the error range. Even if the placement position is offset each time, it is within the error range. The depth of the upper film seat mounting groove is less than or equal to the height of the upper film seat.

[0041] A diaphragm cutting tool mounting position is provided on the outer wall of the clamping end of the upper film seat on the upper clamp shaft 4. In the embodiment, the tool for cutting the diaphragm is connected by threads, and a tool connection thread is provided on the outer wall of the clamping end of the upper film seat on the upper clamp shaft 4. And the tool can rotate circumferentially along the upper clamp shaft 4.

[0042] Combined with Figure 4 and 6It can be seen that one end of the upper fixture shaft 4 away from the clamping end of the upper film seat is sleeved in the upper bearing seat 5, the upper bearing seat 5 is fixed on the upper fixture shaft fixing position of the guiding sliding sleeve 6, the guiding sliding sleeve 6 is connected to the oil cylinder output shaft 7a of the hydraulic cylinder 7, the upper fixture shaft 4 is coaxially arranged with the oil cylinder output shaft 7a, and the hydraulic cylinder 7 is fixed on the base support plate 1b.

[0043] Combined with Figure 4 and 6 It can be seen that on both side ends of the upper fixture shaft fixing position of the guiding sliding sleeve 6, a guiding through hole is symmetrically arranged. A fixture column 8 is respectively sleeved in the two guiding through holes. The axis of the fixture column 8 is parallel to the axis of the upper fixture shaft 4, that is, the coaxiality of the upper fixture shaft 4 and the lower fixture shaft 3 is realized, and the axes of the upper fixture shaft 4 and the lower fixture shaft 3 are parallel to each other and the fixture column 8.

[0044] Combined with Figure 4 It can be seen that the two fixture columns 8 are fixed between the base base 1a and the base support plate 1b through the fixture bottom plate 14b and the fixture support plate 14a.

[0045] A welding torch fixture 11 is fixed on one of the fixture columns 8. The welding torch fixture 11 is used to connect the welding torch. In this embodiment, the welding torch is not shown in the figure.

[0046] Combined with Figure 4 It can also be seen that a lower film seat installation groove 3a is opened on the end face of the clamping end of the lower film seat of the lower fixture shaft 3. The lower fixture shaft 3 is sleeved in the lower bearing seat 9. The lower bearing seat 9 is fixed on the base base 1a. One side of the lower bearing seat 9 close to the end of the lower fixture shaft 3 away from the clamping end of the lower film seat is set as the diaphragm fixture installation position; one end of the lower fixture shaft 3 away from the clamping end of the lower film seat passes through the lower bearing seat 9 and the base base 1a and then is connected to the lower fixture shaft rotation driving assembly 10.

[0047] Combined with Figure 7 and Figure 5 It can be seen that the lower fixture shaft rotation driving assembly 10 includes a rotation motor 10a. A driving gear 10b is connected to the output shaft of the rotation motor 10a. One end of the lower fixture shaft 3 away from the clamping end of the lower film seat is connected to a driven gear 10c. The driving gear 10b and the driven gear 10c are meshed.

Claims

1. A processing tooling for a pressure sensor, characterized in that: It includes a base pedestal (1a) and a base support plate (1b). At least one support stud (2) is erected between the base pedestal (1a) and the base support plate (1b). A lower clamp shaft (3) is installed on the base pedestal (1a). An upper clamp shaft (4) is movably installed at the bottom of the base support plate (1b). The lower clamp shaft (3) and the upper clamp shaft (4) are coaxially arranged. The lower film seat clamping end of the lower clamp shaft (3) faces the upper film seat clamping end of the upper clamp shaft (4). A diaphragm clamp mounting position is provided on the lower clamp shaft (3). A welding torch is arranged between the base pedestal (1a) and the base support plate (1b). A diaphragm cutting tool mounting position is provided on the outer wall of the upper film seat clamping end of the upper clamp shaft (4). A lower film seat mounting groove (3a) is formed on the end face of the lower film seat clamping end of the lower clamp shaft (3). The lower clamp shaft (3) is sleeved in a lower bearing seat (9), and the lower bearing seat (9) is fixed on the base pedestal (1a). The upper side of the lower bearing seat (9) is the diaphragm clamp mounting position. The lower end of the lower clamp shaft (3) passes through the lower bearing seat (9) and the base pedestal (1a) and then is connected to a lower clamp shaft rotation driving assembly (10). During the processing, a lower film seat is placed in the lower film seat mounting groove. During the descending process of the upper film seat, the lower film seat remains stationary, so that the diaphragm is clamped between the upper and lower film seats. Among them, the diaphragm is placed on the top of the lower film seat by a diaphragm clamp. The edge of the diaphragm is clamped by the diaphragm clamp to form tension. After the upper film seat descends, the diaphragm is fixedly clamped between the upper and lower film seats. After cutting, welding is carried out under the drive of the lower clamp shaft rotation driving assembly.

2. The processing tooling for the pressure sensor according to claim 1, characterized in that: An upper film seat mounting groove (4a) is formed on the end face of the upper film seat clamping end of the upper clamp shaft (4), and a magnetic block (4b) is fixed on the top of the upper film seat mounting groove (4a).

3. The processing tooling for a pressure sensor according to claim 1 or 2, characterized in that: One end of the upper clamp shaft (4) far from the upper film seat clamping end is sleeved in an upper bearing seat (5). The upper bearing seat (5) is fixed at the upper clamp shaft fixing position of a guide sliding sleeve (6). The guide sliding sleeve (6) is connected to the oil cylinder output shaft (7a) of a hydraulic cylinder (7). The upper clamp shaft (4) is coaxially arranged with the oil cylinder output shaft (7a). The hydraulic cylinder (7) is fixed on the base support plate (1b).

4. The pressure sensor processing tooling according to claim 3, characterized in that: One guide through hole is symmetrically arranged at each of the two end parts on both sides of the upper clamp shaft fixing position of the guide sliding sleeve (6). A clamp column (8) is respectively sleeved in the two guide through holes. The axis of the clamp column (8) is parallel to the axis of the upper clamp shaft (4). The two clamp columns (8) are fixed between the base pedestal (1a) and the base support plate (1b).

5. The processing tooling for the pressure sensor according to claim 4, wherein: A welding torch clamp (11) is fixed on any one of the clamp columns (8), and the welding torch clamp (11) is used to connect the welding torch.

6. The processing tooling for the pressure sensor according to claim 1, characterized in that: The lower fixture shaft rotation drive assembly (10) includes a rotation motor (10a), a drive gear (10b) is connected to the output shaft of the rotation motor (10a), one end of the lower fixture shaft (3) away from the clamping end of the lower film seat is connected with a driven gear (10c), and the drive gear (10b) meshes with the driven gear (10c).

7. The processing tooling for the pressure sensor according to claim 1, characterized in that: A fixture bottom plate (14b) is further fixed on the base base (1a), and a lower bearing seat (9) sleeving the lower fixture shaft (3) is fixed on the base base (1a) through the fixture bottom plate (14b); A fixture support plate (14a) is fixed at the bottom of the base support plate (1b), and both ends of a fixture column (8) between the base base (1a) and the base support plate (1b) are respectively fixed through the fixture bottom plate (14b) and the base support plate (1b).

8. The processing tooling for a pressure sensor according to claim 1, characterized in that: The base base (1a) is fixed on a tooling base (12), and at least 4 tooling base foot balance seats (13) are further arranged at the bottom of the tooling base (12).

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