Calibration device and calibration clamping method for ceramic core assembly
By designing the calibration device for ceramic core components, using sealed tooling and elastic clamping parts, the clamping difficulties and instability of ceramic core components before the shell is not assembled, and the effect of stable calibration is achieved.
Patent Information
- Application Number
- CN202411398894.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-02-11
AI Technical Summary
In the prior art, the ceramic core assembly is calibrated before the housing is not assembled, clamping is difficult, and the relative displacement of the connector and core body leads to unstable calibration.
A calibration device for ceramic core assembly is designed, including sealing tooling, pressure mechanism and calibration host. Using elastic pins and inclined elastic strips in sealing tooling, the ceramic core is realized through flexible circuit boards and limiting components. Stable clamping and calibration of components.
The stable calibration of the ceramic core assembly is achieved, which avoids the skew of the connector or core body, ensures the normal calibration, and reduces the tension on the flexible circuit board, avoids damage.
Smart Images
Figure CN119413352A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pressure sensors, and in particular to a calibration device and a calibration clamping method for a ceramic core component. Background Art
[0002] Pressure sensors need to be calibrated during the production process. At present, the market generally calibrates pressure sensors after they are assembled, which is a delayed calibration. However, since sensor calibration requires high-precision pressure control and reasonable sealing force coordination, some sensor companies on the market do not master sensor calibration technology. In addition, due to the large investment in overall calibration equipment, many sensor companies are unwilling to invest.
[0003] Therefore, before the pressure sensor is assembled, that is, before the ceramic core assembly is assembled into the shell, it has become a market demand to calibrate the ceramic core assembly. By calibrating the ceramic core assembly, sensor companies can purchase calibrated ceramic core assemblies and then assemble the shell by themselves. In this way, sensor companies do not need to calibrate the pressure sensor after it is assembled and can sell it directly.
[0004] The calibration of the pressure sensor is easy to achieve because it is assembled with a shell and clamped. The calibration of the ceramic core assembly is relatively difficult because it does not have an assembled shell, and a set of stable sealing tooling needs to be redeveloped. In addition, the connector and the ceramic core body that make up the ceramic core assembly are not fixed together, and the two will have relative displacement. Therefore, when the connector and the core body are installed in the sealing tooling, there will be instability problems, which may cause the connector or the core body to be skewed, affecting the normal calibration. Summary of the invention
[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a calibration device and a calibration clamping method for a ceramic core assembly, aiming to achieve stable calibration of the ceramic core assembly.
[0006] Technical solution: To achieve the above-mentioned purpose, the present invention provides a calibration device for a ceramic core assembly, wherein the ceramic core assembly includes a core body and a connector, and the calibration device includes a sealing tool, a pressure mechanism and a calibration host; the ceramic core assembly is clamped in the sealing tool, and a pressure measuring port and a test probe are provided in the sealing tool; the pressure mechanism supplies pressure to the pressure measuring port, and the pressure measuring port is opposite to the pressure-sensitive surface of the core body; the calibration host is electrically connected to the test probe, and the test probe is in contact with the pin on the connector; the core body and the connector are connected through a flexible circuit board, so that the core body and the connector can be relatively displaced; a limit assembly is provided in the sealing tool to limit the displacement of the core body and the connector in the sealing tool.
[0007] Furthermore, the sealing tooling includes an upper clamp and a lower clamp that are arranged relatively to each other; the lower clamp has a placement groove on the top, and the pressure measuring port is located at the bottom of the placement groove; the upper clamp has a cover groove on the bottom, and the test probe is located at the top of the cover groove; when the upper clamp and the lower clamp are clamped together, the placement groove and the cover groove form a cavity for accommodating the ceramic core assembly.
[0008] Furthermore, there is a sealing ring in the placement groove of the lower clamp, and the sealing ring corresponds to surrounding the pressure measuring port; the limit assembly includes a pressure block arranged on the upper clamp, and when the upper clamp and the lower clamp are clamped together, the pressure block is pressed on the connector accordingly, so that the core body under the connector presses the sealing ring to limit the vertical displacement of the core body and the connector.
[0009] Furthermore, the core body is separated from the inner wall of the placement groove by a gap; the limit assembly includes an elastic clamping member arranged in the lower clamp, and the elastic clamping member can apply a horizontal elastic force to the connector or the core body to limit the horizontal displacement of the core body and the connector.
[0010] Furthermore, the elastic clamping member opposite to the core body can also apply an upward elastic force to the core body, so that when the core body is pressed into the placement groove, it is tightly attached to the connector due to the upward elastic force.
[0011] Furthermore, the elastic clamping member includes an elastic strip, which is arranged at an angle and gradually moves away from the inner wall of the placement groove from top to bottom; when the core body is pressed into the placement groove, the lower edge of the core body is pressed against the elastic strip to cause the elastic strip to bend and deform, and the elastic strip in the bent state applies an oblique upward elastic force to the core body.
[0012] Furthermore, the elastic clamping member includes an elastic pin, which is arranged transversely and located above the elastic strip; when the core body presses the sealing ring, the elastic pin corresponds to the connector and applies a horizontal elastic force to the connector.
[0013] Furthermore, the oblique lower end of the elastic strip is fixed to the bottom of the placement groove, and the oblique upper end of the elastic strip is connected to the end of the elastic pin, and the oblique upper end of the elastic strip is tangent to the end of the elastic pin; during the process of pulling the ceramic core assembly out of the placement groove, a gap is separated between the core body and the connector, and when the core body moves upward, it crosses over the elastic pin along the surface of the elastic strip to avoid the elastic pin being stuck in the gap between the core body and the connector.
[0014] Furthermore, in the placement groove, a plurality of elastic pins and elastic strips are arranged in a circumferential direction.
[0015] A calibration clamping method for a ceramic core assembly comprises placing the ceramic core assembly in a placement groove of a lower clamp, pressing the ceramic core assembly downward until the core body is clamped by an elastic strip, a connector is clamped by an elastic pin, and the core body has not yet contacted a sealing ring; then waiting for a period of time until the elastic pin and the elastic strip return to a static state; then the upper clamp moves downward, a pressure block presses on the connector, pressing the connector and the core body downward until the core body presses the sealing ring.
[0016] Beneficial effects: The calibration device and calibration clamping method of a ceramic core assembly of the present invention have the following beneficial effects:
[0017] 1) Calibration of the ceramic core assembly is achieved through the cooperation of the sealing tool, pressure mechanism and calibration host;
[0018] 2) The sealing tool has elastic pins and obliquely arranged elastic strips, which can exert elastic force on the ceramic core assembly to keep the position of the ceramic core assembly in the sealing tool stable;
[0019] 3) The oblique upper end of the elastic strip is connected to the end of the elastic pin. When the ceramic core assembly is pulled out of the sealing tool, the elastic strip can guide the core body to cross the elastic pin so that the elastic pin will not be stuck in the gap between the core body and the connector, thereby preventing the flexible circuit board between the core body and the connector from being damaged due to excessive tension. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Attached Figure 1 A diagram showing the connection relationship between the components of the calibration device of the present invention;
[0021] Attached Figure 2 It is a schematic diagram when the upper clamp is separated from the lower clamp;
[0022] Attached Figure 3 It is a schematic diagram of the upper clamp and the lower clamp when clamped together. DETAILED DESCRIPTION
[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] As attached Figures 1 to 3 The calibration device of a ceramic core assembly, the ceramic core assembly includes a connector 2 and a ceramic core body 1, and the ceramic core body 1 is referred to as the core body 1 below. The calibration device includes a sealing tool 3, a pressure mechanism 4, a calibration host 5 and a power module 16. The ceramic core assembly is clamped in the sealing tool 3, and a pressure measuring port 6 and a test probe 7 are provided in the sealing tool 3. The pressure mechanism 4 supplies pressure to the pressure measuring port 6, and the pressure measuring port 6 is opposite to the pressure-sensitive surface of the core body 1. The calibration host 5 is electrically connected to the test probe 7, and the test probe 7 is in contact with the pin on the connector 2.
[0025] As attached Figure 1 As shown in , the pressure mechanism 4 includes a pressure pipeline, a pressure source 17, a pressure controller 18 and a pressure valve 19. When calibrating, the ceramic core assembly is placed in the sealing tool 3, the pressure-sensitive surface of the core body 1 is opposite to the pressure measuring port 6, the pressure source 17 provides source pressure to the pressure measuring port 6 through the pressure pipeline, and the pressure valve 19 is connected to the pressure controller 18 to accurately control the pressure. The calibration host 5 is installed with a calibration board 20, and the calibration host 5 sets parameters through software and finally sets parameters for the core body 1. The connector 2 connects the calibration board 20 and the power module 16 through the test probe 7 for power supply and data transmission.
[0026] Since the ceramic core assembly to be calibrated is not assembled with a housing, and the core body 1 and the plug connector 2 are connected to each other through a flexible circuit board, the core body 1 and the plug connector 2 are not fixed together, so relative displacement can occur between the core body 1 and the plug connector 2, which leads to instability when the ceramic core assembly is installed in the sealing fixture 3, which may cause the plug connector 2 or the core body 1 to tilt, affecting the normal calibration. Therefore, a limit assembly is set in the sealing fixture 3 to limit the displacement of the core body 1 and the plug connector 2 in the sealing fixture 3, so that the calibration of the ceramic core assembly can be carried out stably.
[0027] As attached Figure 2 As shown in the figure, the sealing fixture 3 includes an upper fixture 8 and a lower fixture 9 which are arranged opposite to each other. The top of the lower fixture 9 has a placement groove 10 with an opening facing upward, and the pressure measuring port 6 is located at the bottom of the placement groove 10. The bottom of the upper fixture 8 has a cover groove 11 with an opening facing downward, and the test probe 7 is correspondingly arranged at the top of the cover groove 11. When the upper fixture 8 and the lower fixture 9 are clamped relative to each other, the placement groove 10 and the cover groove 11 form a cavity for accommodating the ceramic core assembly.
[0028] A sealing groove is provided at the bottom of the placement groove 10 of the lower clamp 9, and a sealing ring 12 is provided in the sealing groove, and the sealing ring 12 correspondingly surrounds the pressure measuring port 6. The limit assembly includes a pressure block 13 provided on the upper clamp 8. When the upper clamp 8 and the lower clamp 9 are clamped together, the pressure block 13 is pressed on the connector 2, and the connector 2 is above the core body 1, so the pressure block 13 will press the core body 1 through the connector 2, so that the core body 1 is correspondingly pressed against the sealing ring 12. The compressed sealing ring 12 can realize the sealing function, so that the pressure mechanism 4 can apply pressure to the pressure-sensitive surface of the core body 1 through the pressure measuring port 6. Moreover, since the pressure block 13 presses the connector 2 and the core body 1 against the sealing ring 12, the vertical displacement of the core body 1 and the connector 2 in the sealing tool 3 can be limited.
[0029] The cross-sectional area of the placement groove 10 is larger than that of the core body 1, so that the core body 1 is easier to be placed in the placement groove 10. After the core body 1 is placed in the placement groove 10, the core body 1 is separated from the inner wall of the placement groove 10 by a gap, and the limit assembly includes an elastic clamping member arranged in the lower clamp 9, and the elastic clamping member can apply a horizontal elastic force to the plug connector 2 or the core body 1 to limit the horizontal displacement of the core body 1 and the plug connector 2, so that the core body 1 and the plug connector 2 can remain stable in the sealing fixture 3.
[0030] Normally, since the core body 1 and the connector 2 are not fixed together, the core body 1 and the connector 2 will separate due to gravity when they are placed in the lower clamp 9. After separation, the two are unstable, which easily causes the core body 1 to tilt in the placement groove 10. Therefore, in the present invention, the elastic clamping member opposite to the core body 1 can also apply an upward elastic force to the core body 1, so that the core body 1 is pressed into the placement groove 10 and is tightly attached to the connector 2 due to the upward elastic force. As a result, the positions of the core body 1 and the connector 2 are relatively fixed, and the core body 1 is more stable when placed in the placement groove 10, and is not easily deflected.
[0031] Specifically, the elastic clamping member includes an elastic strip 14, and a plurality of elastic strips 14 are arranged in a circumferential direction in the placement groove 10. The elastic strip 14 is substantially vertical, and the elastic strip 14 is arranged obliquely, and the elastic strip 14 gradually moves away from the inner wall of the placement groove 10 from top to bottom. In the process of the core body 1 being pressed into the placement groove 10, the lower edge of the core body 1 is pressed on the elastic strip 14, so that the elastic strip 14 is bent and deformed, and the elastic strip 14 in the bent state applies an oblique upward elastic force to the core body 1, and the oblique upward elastic force has a horizontal and vertical component. Under the action of the horizontal elastic component, the plurality of elastic strips 14 can cooperate to clamp the core body 1, limit the horizontal displacement of the core body 1 in the placement groove 10, and can make the core body 1 centered in the placement groove 10. Under the action of the upward elastic component, the core body 1 can keep in contact with the connector 2 in the process of being placed in the placement groove 10, which is conducive to maintaining the stability of the core body 1 and the connector 2.
[0032] In addition, the elastic clamping member includes an elastic pin 15, and a plurality of elastic pins 15 are arranged in a circumferential direction in the placement groove 10. The elastic pin 15 is arranged horizontally and is located above the elastic strip 14. A pin hole matching the elastic pin 15 is provided on the inner wall of the placement groove 10, and the elastic pin 15 is inserted into the pin hole. When the core body 1 moves down to the compression sealing ring 12, the elastic pin 15 corresponds to the connector 2. At this time, the elastic pin 15 will apply a horizontal elastic force to the connector 2, thereby maintaining the stability of the connector 2 in the sealing tool 3.
[0033] After the ceramic core assembly is calibrated, the ceramic core assembly needs to be pulled out from the placement slot 10. During the pulling-out process, the core body 1 and the connector 2 will separate from each other, thereby generating a gap between the core body 1 and the connector 2, causing the elastic pin 15 to be stuck in the gap between the core body 1 and the connector 2. At this time, if the ceramic core assembly is pulled upward, a large force will be applied to the flexible circuit board between the core body 1 and the connector 2, which may cause damage to the flexible circuit board.
[0034] Therefore, in the present invention, the oblique lower end of the elastic strip 14 is fixed to the bottom of the placement groove 10, and the oblique upper end of the elastic strip 14 is connected to the end of the elastic pin 15, and the oblique upper end of the elastic strip 14 is tangent to the end of the elastic pin 15. Therefore, when the core body 1 is pulled upward, it will cross the elastic pin 15 along the surface of the elastic strip 14, thereby preventing the elastic pin 15 from being stuck in the gap between the core body 1 and the connector 2, so as to prevent the flexible circuit board from being subjected to a large pulling force, and the flexible circuit board is not easily damaged.
[0035] Therefore, in the present invention, the elastic strip 14 has three functions: first, to clamp the core body 1 laterally so that the core body 1 can remain centered in the placement groove 10; second, to provide an upward elastic force so that the core body 1 can remain in contact with the connector 2 during the placement groove 10, making the positions of the core body 1 and the connector 2 more stable; third, to guide the core body 1 to cross the elastic pin 15 so that the elastic pin 15 will not be stuck in the gap between the core body 1 and the connector 2, thereby avoiding damage to the flexible circuit board between the core body 1 and the connector 2 due to excessive tension.
[0036] The present invention also provides a calibration clamping method for a ceramic core assembly, which optimizes the process of loading the ceramic core assembly into the sealing tool 3, specifically as follows: in the process of loading the ceramic core assembly into the sealing tool 3, first place the ceramic core assembly in the placement groove 10 of the lower clamp 9, and press the ceramic core assembly downward until the core body 1 is clamped by the elastic strip 14, the connector 2 is clamped by the elastic pin 15, and the core body 1 has not yet contacted the sealing ring 12; then wait for a period of time until the elastic pin 15 and the elastic strip 14 return to a stationary state, at which time the core body 1 and the connector 2 also return to a stationary state and are centered in the placement groove 10; then the upper clamp 8 moves downward, and the pressure block 13 is pressed on the connector 2 accordingly, and presses the connector 2 and the core body 1 downward until the core body 1 presses the sealing ring 12, thereby completing the clamping of the ceramic core assembly.
[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A calibration device for a ceramic core assembly, characterized in that: The ceramic core assembly comprises a core body (1) and a connector (2), and the calibration device comprises a sealing tool (3), a pressure mechanism (4) and a calibration host (5); The ceramic core assembly is clamped in a sealing tool (3), and a pressure measuring port (6) and a test probe (7) are provided in the sealing tool (3); the pressure mechanism (4) supplies pressure to the pressure measuring port (6), and the pressure measuring port (6) is opposite to the pressure-sensitive surface of the core body (1); the calibration host (5) is electrically connected to the test probe (7), and the test probe (7) is in contact with the pin on the connector (2); The core body (1) and the connector (2) are connected via a flexible circuit board, so that the core body (1) and the connector (2) can be relatively displaced; a limit position component is arranged in the sealing tool (3) to limit the displacement of the core body (1) and the connector (2) in the sealing tool (3).
2. The calibration device for a ceramic core assembly according to claim 1, characterized in that: The sealing tool (3) comprises an upper clamp (8) and a lower clamp (9) which are arranged opposite to each other; the top of the lower clamp (9) is provided with a placement groove (10), and the pressure measuring port (6) is located at the bottom of the placement groove (10); the bottom of the upper clamp (8) is provided with a cover groove (11), and the test probe (7) is located at the top of the cover groove (11); when the upper clamp (8) and the lower clamp (9) are clamped together, the placement groove (10) and the cover groove (11) form a cavity for accommodating the ceramic core assembly.
3. The calibration device for a ceramic core assembly according to claim 2, characterized in that: A sealing ring (12) is provided in the placement groove (10) of the lower clamp (9), and the sealing ring (12) correspondingly surrounds the pressure measuring port (6); the limit assembly includes a pressure block (13) arranged on the upper clamp (8), and when the upper clamp (8) and the lower clamp (9) are clamped together, the pressure block (13) is pressed on the connector (2) accordingly, so that the core body (1) below the connector (2) presses the sealing ring (12) to limit the vertical displacement of the core body (1) and the connector (2).
4. The calibration device for a ceramic core assembly according to claim 3, characterized in that: The core body (1) is separated from the inner wall of the placement groove (10) by a gap; the limit assembly comprises an elastic clamping member arranged in the lower clamp (9), and the elastic clamping member can apply a horizontal elastic force to the connector (2) or the core body (1) to limit the horizontal displacement of the core body (1) and the connector (2).
5. The calibration device for a ceramic core assembly according to claim 4, characterized in that: The elastic clamping member opposite to the core body (1) can also apply an upward elastic force to the core body (1), so that when the core body (1) is pressed into the placement groove (10), it is tightly attached to the connector (2) due to the upward elastic force.
6. The calibration device for a ceramic core assembly according to claim 5, characterized in that: The elastic clamping member comprises an elastic strip (14), the elastic strip (14) is arranged obliquely, and the elastic strip (14) gradually moves away from the inner wall of the placement groove (10) from top to bottom; when the core body (1) is pressed into the placement groove (10), the lower edge of the core body (1) is pressed on the elastic strip (14) accordingly, so that the elastic strip (14) is bent and deformed, and the elastic strip (14) in the bent state applies an oblique upward elastic force to the core body (1).
7. A calibration device for a ceramic core assembly according to claim 6, characterized in that: The elastic clamping member comprises an elastic pin (15), which is arranged transversely and is located above the elastic strip (14); when the core body (1) presses the sealing ring (12), the elastic pin (15) corresponds to the connector (2), and the elastic pin (15) applies a horizontal elastic force to the connector (2).
8. The calibration device for a ceramic core assembly according to claim 7, characterized in that: The oblique lower end of the elastic strip (14) is fixed to the bottom of the placement groove (10), and the oblique upper end of the elastic strip (14) is connected to the end of the elastic pin (15), and the oblique upper end of the elastic strip (14) is tangent to the end of the elastic pin (15); when the ceramic core assembly is pulled out of the placement groove (10), a gap is separated between the core body (1) and the connector (2), and when the core body (1) moves upward, it crosses over the elastic pin (15) along the surface of the elastic strip (14), thereby preventing the elastic pin (15) from being stuck in the gap between the core body (1) and the connector (2).
9. The calibration device for a ceramic core assembly according to claim 8, characterized in that: In the placement groove (10), a plurality of elastic pins (15) and elastic strips (14) are arranged in a circumferential direction.
10. A calibration clamping method for a ceramic core assembly according to claim 9, characterized in that: The ceramic core assembly is placed in the placement groove (10) of the lower clamp (9), and the ceramic core assembly is pressed downward until the core body (1) is clamped by the elastic strip (14), the connector (2) is clamped by the elastic pin (15), and the core body (1) has not yet contacted the sealing ring (12); then wait for a period of time until the elastic pin (15) and the elastic strip (14) return to a static state; then the upper clamp (8) moves downward, and the pressing block (13) presses on the connector (2), pressing the connector (2) and the core body (1) downward until the core body (1) presses the sealing ring (12).