High temperature welding distance control fixture

Abstract

The utility model discloses a kind of high-temperature welding control distance clamps, it is related to pressure sensor preparation technical field, comprising: pedestal, the through hole of being passed through itself is opened in the middle of the pedestal, the through hole is used for putting into cylindrical welding piece, and and the size of cylindrical welding piece is compatible;Several placement grooves are uniformly distributed on the upper end circumferential side of the through hole, and the placement groove is used for putting into the lug of the side edge of plate-shaped welding piece;Upper cover plate, the upper cover plate is provided with several and placement groove compatible protrusions, the protrusion is used for being inserted into corresponding placement groove, and lug is pressed;The upper end of cylindrical welding piece is lower than the bottom surface of placement groove, and solder placed on the cylindrical welding piece is higher than the bottom surface of placement groove. By the positioning of through hole and placement groove, and the depression of protruding block, the structure design can control welding piece welding alignment accuracy and welding interval between welding piece under high-temperature welding environment.

Description

Technical Field

[0001] This utility model relates to the field of pressure-sensitive sensor manufacturing technology, specifically to a high-temperature welding distance control fixture. Background Technology

[0002] Pressure sensors require the assembly and welding of two ceramic welding components to form a fixed, sealed space. When this sealed space is compressed, a change in capacitance is generated, which is converted into an electrical signal through a circuit. This necessitates welding the two components at a high temperature of 800℃, requiring precise alignment and a fixed spacing.

[0003] In current direct welding processes, relative displacement can easily occur between welded components during solder melting, causing air leakage and misalignment in the sealed space, resulting in poor yield. Furthermore, the spacing between welded components is uncontrollable after welding, leading to poor consistency in sensor signal output and affecting product yield. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention aims to provide a high-temperature welding distance control fixture. By employing this solution, through the positioning of countersunk holes and placement grooves, and the downward pressing of protrusions, this structural design can control the welding alignment accuracy and welding spacing between welded parts in a high-temperature welding environment.

[0005] This utility model is achieved through the following technical solution:

[0006] A high-temperature welding distance control fixture, comprising:

[0007] The base has a countersunk hole in the middle, which is used to place a cylindrical welded part and is adapted to the size of the cylindrical welded part; several placement grooves are evenly distributed on the upper periphery of the countersunk hole, which are used to place the side lugs of the plate welded part.

[0008] The upper cover plate has several protrusions that are adapted to the placement grooves. The protrusions are used to extend into the corresponding placement grooves and press down on the support ears.

[0009] The upper end of the cylindrical welded part is lower than the bottom surface of the placement groove, while the solder placed on the cylindrical welded part is higher than the bottom surface of the placement groove.

[0010] Compared to existing technologies, where relative displacement between welding components is prone to occur and the spacing between welding components is uncontrollable, resulting in poor consistency of sensor signal output and affecting product yield, this utility model provides a high-temperature welding distance control fixture. By using the positioning of countersunk holes and placement grooves, as well as the pressing down of protrusions, this structural design can control the welding alignment accuracy and welding spacing between welding components in a high-temperature welding environment. The specific design includes a base and a top cover plate. The base has a through-hole in its center, with a stepped surface for placing cylindrical welded parts. The dimensions of the two components are matched to prevent misalignment. Four placement slots are evenly distributed on the circumferential sidewall of the upper end of the countersunk hole, connecting to the countersunk hole and allowing the side lugs of the plate-shaped welded parts to enter. In actual assembly, the cylindrical welded parts are first placed into the countersunk hole, with the top surface of the part lower than the bottom surface of the placement slot. The distance between the top surface of the part and the bottom surface of the slot is a pre-set fixed distance. Then, a ring of solder is placed on the cylindrical welded parts, with the solder height higher than the bottom surface of the placement slot. Finally, the plate-shaped welded parts are placed in the countersunk hole. The four lugs of the plate-shaped welded component are each placed into a placement groove. Due to the limitation of the solder, the lugs of the plate-shaped welded component are suspended in the placement groove. At this time, the upper cover plate is put on, so that the four protrusions on the upper cover plate press on the four lugs respectively. The installation is now complete. Then, the installed fixture is placed in a high-temperature welding furnace. The solder melts into liquid at high temperature and is squeezed downward under the gravity of the upper cover plate. The solder overflows in all directions, and the plate-shaped welded component gradually moves downward towards the cylindrical welded component until the lugs of the plate-shaped welded component contact the bottom surface of the placement groove, which means that the welding is in place. At this time, the distance between the plate-shaped welded component and the cylindrical welded component is a controlled fixed distance. After the welding cools down, precise distance-controlled welding can be achieved.

[0011] To further optimize the design and prevent welding deviations caused by overflowing solder, the inner side of the circumferential bottom surface of the countersunk hole is equipped with an circumferential groove. In this design, after the solder melts, excess solder overflows downwards from the assembly gap between the cylindrical weldment and the countersunk hole and enters the circumferential groove.

[0012] Further optimization, to improve the stability of the upper cover plate and enable it to press down stably under its own weight, for positioning and installation of welded parts and for mating with the base, is configured as follows: the base has a boss in the middle, and the countersunk hole is located in the middle of the boss; the upper cover plate has a groove that matches the boss, and several protrusions are located in the groove;

[0013] The upper cover plate is fastened to the protrusion via a groove.

[0014] As a further optimization and a preferred structural shape, both the boss and the groove are square.

[0015] For further optimization, to facilitate the snapping of the top cover, the upper end of the protrusion is a guide surface with gradually decreasing size.

[0016] To further optimize the design and avoid obstacles at the top corner, the top corner of the boss is beveled.

[0017] For further optimization, the groove opening is flared to facilitate the entry of the protrusion.

[0018] Further optimization involves adapting the shape of the support ear by connecting one end of the placement groove to the countersunk hole, and the other end of the placement groove being an arc shape that matches the end of the support ear.

[0019] To further optimize the exhaust function, the upper cover plate has a through hole in its center, and several protrusions are evenly distributed around the circumference of the through hole. Both the countersunk hole in the base and the through hole in the upper cover plate are used for exhaust.

[0020] In a further optimization, both the base and the top cover are made of ceramic material. Specifically, both the base and the top cover are flat, hollow frame structures made of high-strength, corrosion-resistant, and high-temperature-resistant ceramic materials (such as alumina ceramic).

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] 1. The present invention provides a high-temperature welding distance control fixture. By using this solution, through the positioning of the countersunk hole and the placement groove, as well as the pressing down of the protrusion, the structural design can control the welding alignment accuracy and the welding distance between the welded parts in a high-temperature welding environment.

[0023] 2. This utility model provides a high-temperature welding spacing control fixture. The fixture material is high-temperature resistant, does not deform at high temperatures, and prevents solder adhesion. The fixture uses high-temperature sintered ceramic material, which has good temperature resistance and almost no high-temperature deformation in an 800℃ high-temperature welding environment. Furthermore, the inherent solder-resistant properties of the ceramic effectively prevent solder overflow and adhesion, effectively ensuring welding alignment and controlling solder overflow.

[0024] 3. This utility model provides a high-temperature welding spacing control fixture. By using countersunk holes specially designed on the base to match the cylindrical welding parts, the cylindrical welding parts are placed into the countersunk holes for welding, improving welding alignment accuracy and effectively preventing welding deviations caused by solder melting and overflow. Furthermore, it can be designed according to the thickness of the welding parts. The four placement slots on the base act as supports, limiting the sinking position of plate-shaped welding parts, while the weight of the upper cover plate provides welding pressure. These elements work together to control the fixed spacing between the welding parts, resulting in good welding consistency of the components. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a structural diagram of the assembled structure provided by this utility model;

[0027] Figure 2 A schematic diagram of the base structure provided by this utility model;

[0028] Figure 3 A schematic diagram of the upper cover plate structure provided by this utility model;

[0029] Figure 4 Provided by this utility model Figure 1 Sectional view in;

[0030] Figure 5 The diagram shows the structural schematics of the welded components provided by this utility model.

[0031] The attached diagram shows the markings and corresponding component names:

[0032] 1-Base, 101-Counterhole, 102-Placement groove, 103-Boss, 104-Circumferential groove, 2-Upper cover plate, 201-Protrusion, 202-Groove, 3-Plate-shaped welded part, 301-Support ear, 4-Welding material, 5-Columnar welded part. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0034] Example:

[0035] This embodiment provides a high-temperature welding distance control fixture, such as... Figures 1-5 As shown, it includes:

[0036] The base 1 has a countersunk hole 101 through its center, which is used to place the cylindrical welded part 5 and is adapted to the size of the cylindrical welded part 5. Several placement grooves 102 are evenly distributed on the upper periphery of the countersunk hole 101, which are used to place the lugs 301 on the side of the plate welded part 3.

[0037] The upper cover plate 2 has a plurality of protrusions 201 that are adapted to the placement groove 102. The protrusions 201 are used to extend into the corresponding placement groove 102 and press down the support lug 301.

[0038] The upper end of the cylindrical welded part 5 is lower than the bottom surface of the placement groove 102, while the solder 4 placed on the cylindrical welded part 5 is higher than the bottom surface of the placement groove 102.

[0039] Compared to existing technologies, where relative displacement between welding components is prone to occur and the spacing between welding components is uncontrollable, resulting in poor consistency of sensor signal output and affecting product yield, this utility model provides a high-temperature welding distance control fixture. By using this solution, through the positioning of the countersunk hole 101 and the placement groove 102, as well as the downward pressing of the protrusion, this structural design can control the welding alignment accuracy and welding spacing between welding components in a high-temperature welding environment. The specific design includes a base 1 and a top cover 2. The base 1 has a through-hole 101 in its center. The stepped surface of the through-hole 101 is used to place a cylindrical welded component 5, and the two components are sized to match to prevent the cylindrical welded component 5 from shifting. Four placement slots 102 are evenly distributed on the circumferential sidewall at the upper end of the through-hole 101. The placement slots 102 are connected to the through-hole 101 and are used to allow the side lugs 301 of the plate-shaped welded component 3 to enter. In the actual assembly process, the cylindrical welded component 5 is first placed into the through-hole 101, with the top surface of the cylindrical welded component 5 lower than the bottom surface of the placement slot 102. The distance between the top surface of the cylindrical welded component 5 and the bottom surface of the placement slot 102 is a pre-set fixed distance. Then, an annular solder 4 is placed on the cylindrical welded component 5, with the height of the solder 4 higher than the bottom surface of the placement slot 102. Then, the plate-shaped welded component 3 is placed... Part 3, so that the four lugs 301 of the plate-shaped welded part 3 are respectively placed into a placement groove 102. Due to the restriction of the solder 4, the lugs 301 of the plate-shaped welded part 3 are suspended in the placement groove 102. At this time, the upper cover plate 2 is covered, so that the four protrusions 201 on the upper cover plate 2 press on the four lugs 301 respectively. At this time, the installation is completed. Then, the fixture after installation is placed in the high temperature welding furnace. The solder 4 melts into liquid at high temperature and is squeezed downward under the gravity of the upper cover plate 2. The solder 4 overflows to all sides. The plate-shaped welded part 3 gradually moves downward and approaches the cylindrical welded part 5 until the lugs 301 of the plate-shaped welded part 3 contact the bottom surface of the placement groove 102, which means that the welding is in place. At this time, the distance between the plate-shaped welded part 3 and the cylindrical welded part 5 is a controlled fixed distance. After the welding cools down, precise positioning and distance control welding can be achieved.

[0040] In some embodiments, to prevent overflowing solder 4 from causing welding deviations, the inner side of the circumferential bottom surface of the countersunk hole 101 is provided with an circumferential groove 104. In this embodiment, after the solder 4 melts, excess solder 4 overflows downward from the assembly gap between the cylindrical weldment 5 and the countersunk hole 101 and enters the circumferential groove 104.

[0041] In some embodiments, to improve the stability of the upper cover plate 2 and enable it to press down stably under its own weight for positioning and installation of welded parts and for engagement with the base 1, the following configuration is provided: a boss 103 is provided in the middle of the base 1, and a countersunk hole 101 is provided in the middle of the boss 103; the upper cover plate 2 has a groove 202 adapted to the boss 103, and a plurality of protrusions 201 are located in the groove 202;

[0042] The upper cover plate 2 is fastened to the boss 103 through the groove 202.

[0043] In some embodiments, as a preferred structural shape, both the boss 103 and the groove 202 are square.

[0044] In some embodiments, to facilitate the fastening of the upper cover plate 2, the upper end of the boss 103 is a guide surface with gradually decreasing size.

[0045] In some embodiments, to avoid obstruction at the top corner, the top corner of the boss 103 is chamfered.

[0046] In some embodiments, the opening end of the groove 202 is flared to facilitate the entry of the protrusion 201.

[0047] In some embodiments, to adapt to the shape of the lug 301, one end of the placement groove 102 is connected to the countersunk hole 101, and the other end of the placement groove 102 is an arc shape that adapts to the end of the lug 301.

[0048] In some embodiments, to achieve the venting function, the upper cover plate 2 has a through hole in its center, and several protrusions 201 are evenly distributed around the through hole. The countersunk hole 101 in the base 1 and the through hole in the upper cover plate 2 are both used for venting.

[0049] In some embodiments, both the base 1 and the upper cover 2 are made of ceramic material. Specifically, both the base 1 and the upper cover 2 are flat, hollow frame structures made of high-strength, corrosion-resistant, and high-temperature-resistant ceramic material (such as alumina ceramic).

[0050] After the fixture is installed according to the above scheme, it is placed in a high-temperature welding furnace. The solder 4 melts into a liquid at high temperature and is squeezed downward under the gravity of the upper cover plate 2. The solder 4 overflows to all sides, and the plate-shaped welded part 3 gradually moves downward towards the column-shaped welded part 5 until the support ear 301 of the plate-shaped welded part 3 contacts the bottom surface of the placement groove 102, which means that the welding is in place. At this time, the distance between the plate-shaped welded part 3 and the column-shaped welded part 5 is a fixed distance controlled by the system. After the welding cools down, precise distance control welding can be achieved.

[0051] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-temperature welding distance control fixture, characterized in that, include: The base (1) has a countersunk hole (101) in the middle, which is used to place the cylindrical welded part (5) and is adapted to the size of the cylindrical welded part (5); a number of placement grooves (102) are evenly distributed on the upper periphery of the countersunk hole (101), which are used to place the lugs (301) on the side of the plate welded part (3). The upper cover plate (2) has a number of protrusions (201) that are adapted to the placement groove (102). The protrusions (201) are used to extend into the corresponding placement groove (102) and press down the support lug (301). The upper end of the cylindrical welded part (5) is lower than the bottom surface of the placement groove (102), while the solder (4) placed on the cylindrical welded part (5) is higher than the bottom surface of the placement groove (102).

2. The high-temperature welding distance control fixture according to claim 1, characterized in that, The countersunk hole (101) has an circumferential groove (104) on the inner side of its circumferential bottom surface.

3. A high-temperature welding distance control fixture according to claim 1, characterized in that, The base (1) has a boss (103) in the middle, and the countersunk hole (101) is located in the middle of the boss (103); the upper cover plate (2) has a groove (202) that matches the boss (103), and a plurality of protrusions (201) are located in the groove (202); The upper cover plate (2) is fastened to the boss (103) through the groove (202).

4. A high-temperature welding distance control fixture according to claim 3, characterized in that, Both the boss (103) and the groove (202) are square.

5. A high-temperature welding distance control fixture according to claim 4, characterized in that, The upper end of the boss (103) is a guide surface with gradually decreasing size.

6. A high-temperature welding distance control fixture according to claim 5, characterized in that, The top corner of the boss (103) is beveled.

7. A high-temperature welding distance control fixture according to claim 3, characterized in that, The groove (202) has a flared opening at the opening end.

8. A high-temperature welding distance control fixture according to claim 1, characterized in that, One end of the placement groove (102) is connected to the countersunk hole (101), and the other end of the placement groove (102) is an arc shape that matches the end of the support lug (301).

9. A high-temperature welding distance control fixture according to claim 1, characterized in that, The upper cover plate (2) has a through hole in the middle, and several protrusions (201) are evenly distributed around the through hole.

10. A high-temperature welding distance control fixture according to claim 1, characterized in that, Both the base (1) and the top cover (2) are made of ceramic material.

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