Integral brazing tool for nerve stimulator

Abstract

The utility model relates to the technical field of nerve stimulator brazing, in particular to a nerve stimulator integral brazing tool which comprises a tool body, the tool body is of a cylinder structure with an opening in the lower portion, an odd number of ventilation openings are evenly distributed in the side wall, the bottoms of the ventilation openings penetrate through the bottom end of the side wall, and the height of the ventilation openings is larger than half of the height of the side wall. The upper portion of the tool body is a bearing table, a boss is arranged in the middle of the bearing table, a plurality of positioning keys are arranged on the boss and matched with a square groove of the nerve stimulator, and a plurality of heat dissipation holes are formed in the bearing table on the outer side of the boss. The tool main body can adjust the overall heat distribution of the tool through the heat conduction characteristic in the air or vacuum environment, the temperature uniformity in the brazing process is controlled within + / -2 DEG C in combination with the stable heat conductivity of the ceramic material, the problems of solder flowing, cracking and the like caused by local overheating or supercooling are avoided, and the brazing quality stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nerve stimulator brazing technical field, concretely is a nerve stimulator whole brazing frock. BACKGROUND

[0002] The nerve stimulator is as a kind of precision medical instrument, and the connection quality of internal component has significant influence on performance.

[0003] Vacuum brazing is important process to realize high-quality connection of nerve stimulator components, but the existing brazing frock is difficult to accurately position the tiny components of nerve stimulator, and the stability of frock itself and the uniformity of heat conduction are insufficient under vacuum environment, leading to unstable brazing quality and high scrap rate, so a vacuum brazing frock specially applicable to nerve stimulator is required.

[0004] In addition, after completing the vacuum brazing process of nerve stimulator, argon protection treatment and fan cooling operation are required. However, the conventional welding method has significant defects in the implementation process, cannot realize uniform distribution and effective protection of argon, and also difficult to ensure the uniformity of cooling effect in the fan cooling link, which may adversely affect the final quality and performance of nerve stimulator. SUMMARY

[0005] To solve the technical problems in the background art, the utility model provides a nerve stimulator whole brazing frock.

[0006] The utility model technical scheme is as follows:

[0007] A nerve stimulator whole brazing frock, including frock main part, frock main part is the cylinder structure of lower part opening, and the side wall is uniformly distributed with odd number of air vents, and the air vent bottom penetrates the side wall bottom end, and the height is greater than half of the height of side wall;

[0008] The upper part of frock main part is support table, and the middle part of support table is provided with boss, and a plurality of positioning keys are arranged on the boss, and cooperate with the square groove of nerve stimulator, and a plurality of heat dissipation holes are opened on the support table outside the boss.

[0009] Frock main part is provided with three air vents.

[0010] The upper part of air vent is arched, and the lower part is square.

[0011] Air vent is inclined upward in the direction of frock main part axis.

[0012] The corresponding central angle of air vent in the direction of cylinder circumference is greater than 60 degrees.

[0013] The heat dissipation hole is arc strip hole, and a plurality of heat dissipation holes are same in shape and interval.

[0014] The center of the heat dissipation hole coincides with the axis of the tool body.

[0015] The center angles of the heat dissipation hole and the vent hole are the same.

[0016] The heat dissipation hole and the vent hole are staggered.

[0017] The positioning key has a square cross section.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. The present application can control the positioning accuracy of the nerve stimulator components within ±0.05mm through the precise positioning device, effectively solving the problem of inaccurate component positioning and improving the consistency of the brazed joint.

[0020] 2. The positioning key suspends the nerve stimulator components and keeps them in the same plane, on the one hand ensuring uniformity of the heating of each component and avoiding uneven welding strength caused by local temperature difference, and on the other hand keeping the metal wire stable in position when it expands under heat, ensuring uniform wetting of the solder along the welding surface and achieving high-quality welding with consistent solder thickness and smooth surface.

[0021] 3. The tool body can adjust the overall heat distribution of the tool through the heat conduction characteristics in air or vacuum environment, combined with the stable heat conductivity of ceramic materials, to control the temperature uniformity within ±2℃ during brazing, avoiding problems such as solder flow and cracking caused by local overheating or overcooling, and improving the brazing quality stability.

[0022] 4. The vent hole and the heat dissipation hole of the present application can achieve uniform distribution and effective protection of argon during argon protection treatment and fan cooling operation, while also ensuring the uniformity of cooling effect during fan cooling, improving the final quality and performance of the nerve stimulator. BRIEF DESCRIPTION OF DRAWINGS

[0023] In the drawings:

[0024] Figure 1 is the overall structure diagram of the present application;

[0025] Figure 2 is the sectional view of the present application.

[0026] The components represented by the reference numerals in the drawings are:

[0027] 1. tool body; 2. vent hole; 3. support table; 4. boss; 5. positioning key; 6. heat dissipation hole. DETAILED DESCRIPTION

[0028] Example 1

[0029] The technical solution of the present application is as follows:

[0030] Referring to Figure 1 A nerve stimulator overall brazing tool, comprising a tool body 1, which is a lower open cylindrical structure, and an odd number of air vents 2 are uniformly distributed on the side wall, the bottom of the air vent 2 penetrates the bottom end of the side wall, and the height is greater than half of the height of the side wall;

[0031] The upper part of the tool body 1 is a supporting table 3, a boss 4 is arranged in the middle of the supporting table 3, a plurality of positioning keys 5 are arranged on the boss 4, which cooperate with the square groove of the nerve stimulator, and a plurality of heat dissipation holes 6 are opened on the supporting table 3 outside the boss 4.

[0032] The tool body 1 is made of 95%-99% alumina ceramic material, and the size is specified according to the brazing product. The alumina ceramic material has good high temperature resistance and insulation, and other alloy materials need to be coated with a solder resist during brazing. The solder resist is in a liquid state and is easy to flow to the surface of the brazing part, which causes poor brazing airtightness or difficulty in brazing. The ceramic material can remain stable in the high temperature environment of vacuum brazing, and will not cause electromagnetic interference to the nerve stimulator components.

[0033] The tool body 1 can adjust the overall heat distribution of the tool through the heat conduction characteristics in the air or vacuum environment, and combine the stable heat conductivity of the ceramic material to control the temperature uniformity in the brazing process within ±2℃, avoid the problems of solder flow, cracking caused by local overheating or overcooling, and improve the brazing quality stability.

[0034] The surface in contact with the nerve stimulator components is polished. The polished surface can reduce the friction between the brazing part and the tool. If there is a large friction, the thermal expansion will cause a large gap between the metal wire and the solder, and the solder and the outer metal, which will cause stress concentration at the welding point during rapid cooling, greatly reducing the welding strength and affecting the product life and function.

[0035] All edges are cleaned and treated, the corner radius R is less than or equal to 0.02mm, all burrs and sharp edges are removed, and damage to the nerve stimulator components is avoided.

[0036] The uniformly distributed odd number of air vents 2 can ensure that the tool body 1 is evenly ventilated in the circumferential direction, and avoid the occurrence of local poor ventilation. The bottom of the air vent 2 penetrates the bottom end of the side wall and the height is greater than half of the height of the side wall, which can increase the ventilation area, improve the ventilation efficiency, timely discharge the heat and harmful gas generated during brazing, effectively reduce the temperature of the nerve stimulator during brazing, reduce the quality problems caused by overheating, such as component damage and poor welding quality, and improve the brazing quality and the reliability of the product.

[0037] The tool main body 1 is provided with three ventilation openings 2. While ensuring the ventilation effect, the structural strength of the tool main body 1 is also taken into account. The three ventilation openings 2 can form a reasonable ventilation path, so that the air can fully circulate in the tool main body 1 and effectively take away heat and harmful gases.

[0038] The upper part of the ventilation opening 2 is arched, and the lower part is square. The upper part of the ventilation opening 2 is designed in an arch shape, which can increase the opening area of the ventilation opening 2 and further improve the ventilation efficiency. At the same time, the arch structure also has certain strength and stability, and can withstand certain external force without being easily deformed. The square design of the lower part is convenient for processing and reduces the manufacturing cost.

[0039] The ventilation opening 2 is inclined upward in the direction towards the axis of the tool main body 1, as shown in Figure 2 The upward inclined opening design can guide the air flow in the tool main body 1 to form an upward air flow, guide the air flow to connect the ventilation opening 2 and the heat dissipation hole 6, and is beneficial to quickly discharge the heat and harmful gases generated in the brazing process. At the same time, the inclined opening can also reduce the possibility of external dust and impurities entering the tool main body 1, maintain the cleanliness of the brazing environment, and further improve the brazing quality.

[0040] The central angle of the ventilation opening 2 in the circumferential direction of the cylinder is greater than 60 degrees, which can increase the width of the ventilation opening 2, so that more air can enter and exit the tool main body 1 through the ventilation opening 2, and the ventilation efficiency is further improved. The larger central angle can also ensure that the ventilation opening 2 covers a wider area in the circumferential direction, so that the ventilation is more uniform.

[0041] Further, the central angle of the ventilation opening 2 in the circumferential direction of the cylinder is less than 90 degrees, which ensures the stability of the overall tool under the premise that the air is sufficient to circulate.

[0042] The support table 3 provides a stable support platform for the nerve stimulator, which can ensure that the nerve stimulator maintains the correct position and posture during brazing, and avoids affecting the brazing quality due to shaking or displacement. The design of the boss 4 can further improve the stability of the nerve stimulator on the support table 3, preventing it from sliding during brazing. The positioning key 5 cooperates with the square groove of the nerve stimulator to achieve accurate positioning of the nerve stimulator, ensuring that the relative positions between the components of the nerve stimulator during brazing are accurate, thereby improving the precision and quality of brazing and reducing the rate of defective products due to inaccurate positioning.

[0043] The cross section of the positioning key 5 is square. It can form a close fit with the square groove of the nerve stimulator, improving the accuracy and stability of positioning.

[0044] The nerve stimulator component positioning precision can be controlled within ±0.05mm by the precise positioning device, the problem of inaccurate component positioning is effectively solved, and the consistency of the brazing joint is improved.

[0045] The positioning key 5 suspends and arranges the nerve stimulator components in the same plane, on one hand, the uniformity of heating of each component is ensured, and the uneven welding strength caused by local temperature difference is avoided; on the other hand, the position of the metal wire can be kept stable when the metal wire is expanded by heating, the solder is uniformly wetted along the welding surface, the high-quality welding with uniform solder thickness and smooth surface is realized.

[0046] The heat dissipation holes 6 are arc-shaped strip holes, and a plurality of heat dissipation holes 6 are arranged in the same shape and interval, and the uniform heat dissipation holes 6 can also make the heat dissipation on the supporting table 3 more uniform, and avoid the situation of local poor heat dissipation.

[0047] The center of the heat dissipation hole 6 coincides with the axis of the tool body 1. The central angles corresponding to the positions of the heat dissipation hole 6 and the ventilation opening 2 are the same. The central angles corresponding to the positions of the heat dissipation hole 6 and the ventilation opening 2 are the same, which can make the heat dissipation and ventilation form a reasonable cooperation in space.

[0048] The heat dissipation hole 6 and the ventilation opening 2 are staggered, the ventilation opening 2 and the heat dissipation hole 6 of the utility model can realize uniform distribution and effective protection of argon in the process of argon protection treatment and fan cooling operation, and also ensure the uniformity of the cooling effect in the fan cooling link, improve the final quality and performance of the nerve stimulator.

Claims

1. A brazing fixture for an integral neurostimulator, characterized in that, Includes a tooling body (1), the tooling body (1) is a cylindrical structure with an opening at the bottom, and an odd number of ventilation openings (2) are evenly distributed on the side wall. The bottom of the ventilation opening (2) penetrates the bottom of the side wall and the height is greater than half the height of the side wall. The upper part of the tooling body (1) is a support platform (3), and a boss (4) is provided in the middle of the support platform (3). Several positioning keys (5) are arranged on the boss (4) to cooperate with the square groove of the nerve stimulator. Multiple heat dissipation holes (6) are opened on the support platform (3) outside the boss (4).

2. The integral brazing fixture for a neurostimulator according to claim 1, characterized in that, The tooling body (1) has three ventilation openings (2).

3. The integral brazing fixture for a neurostimulator according to claim 1, characterized in that, The upper part of the ventilation opening (2) is arched, and the lower part is square.

4. The integral brazing fixture for a neurostimulator according to claim 3, characterized in that, The ventilation opening (2) is inclined upward in the direction of the axis of the tooling body (1).

5. The integral brazing fixture for a neurostimulator according to claim 4, characterized in that, The central angle of the ventilation opening (2) in the circumferential direction of the cylinder is greater than 60 degrees.

6. The integral brazing fixture for a neurostimulator according to claim 1, characterized in that, The heat dissipation holes (6) are arc-shaped strip holes, and multiple heat dissipation holes (6) have the same shape and the same spacing.

7. The integral brazing fixture for a neurostimulator according to claim 6, characterized in that, The center of the heat dissipation hole (6) coincides with the axis of the tooling body (1).

8. The integral brazing fixture for a neurostimulator according to claim 6, characterized in that, The central angles of the locations of the heat dissipation holes (6) and the ventilation openings (2) are the same.

9. The integral brazing fixture for a neurostimulator according to claim 6, characterized in that, The heat dissipation holes (6) and ventilation openings (2) are arranged alternately.

10. The integral brazing fixture for a neurostimulator according to claim 1, characterized in that, The positioning key (5) has a square cross-section.

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