Hot pressing sintering device with controllable pressure

Abstract

The utility model relates to the technical field of metal welding performance experiment equipment, in particular to a pressure-controllable hot pressing sintering device which comprises a supporting mechanism, a heating mechanism and a balance weight mechanism, the balance weight mechanism comprises an extension piece and a bearing piece installed on the extension piece, the bearing piece is used for placing a balance weight, and the heating mechanism is used for heating the balance weight. The extension part is rotationally connected with the supporting mechanism, the rotating axis of the extension part is parallel to the horizontal plane, the heating mechanism comprises an upper heating plate installed on the extension part and a lower heating plate installed on the supporting mechanism, and when the device is in a working state, the upper heating plate and the lower heating plate are parallel to each other. The extension piece rotates around the supporting mechanism, so that the upper heating plate and the lower heating plate are parallel and abut against the two sides of the sample, the upper heating plate and the lower heating plate apply continuous and stable pressure to the gold-plated plate sample by increasing or decreasing the number of the balancing weights, and the pressure in the whole experiment process is only provided by the balancing weights; the weight of the balancing weight can be adjusted according to the needed pressure, additional manual force application is not needed, the stability is better, and the experiment result is more accurate.

Description

Technical Field

[0001] This utility model relates to the technical field of metal welding performance testing equipment, and more specifically, to a pressure-controllable hot pressing sintering device. Background Technology

[0002] Silver solder paste, as a welding material, is commonly used for welding refrigeration components, compressors, stone tools, woodworking tools, and other items. After the silver solder paste is produced, its welding performance needs to be tested. Before testing, a certain amount of the silver solder paste to be tested is applied to two gold-plated plate samples. Then, heating equipment is used to heat the silver solder paste on the two gold-plated plate samples. After the silver solder paste melts under heat, it wets and fills the gap between the two gold-plated plate samples, forming a strong connection between them. Afterwards, the quality of the silver solder paste is determined by analyzing the appearance of the weld seam and the connection strength of the two gold-plated plate samples to ensure that the quality of the welded products meets the usage standards.

[0003] During the heating process of the two gold-plated plate samples, pressure needs to be applied to both samples simultaneously to improve the strength of the weld and make the connection between the two gold-plated plate samples tighter. Currently, the hot pressing device with simple structure and low cost on the market requires manual pressure application. However, manual pressure application is difficult to control the pressure accurately and stably. During sintering, the gold-plated plate samples are prone to more voids due to unstable pressure, which affects the experimental results. Utility Model Content

[0004] The purpose of this invention is to overcome the problem that it is difficult to accurately and stably control the pressure by manually applying pressure in the existing technology, and to provide a pressure-controllable hot pressing sintering device that can precisely adjust and maintain the required pressure during silver sintering, thereby improving the accuracy of the test.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A pressure-controllable hot pressing sintering apparatus is provided, comprising a support mechanism, a heating mechanism, and a counterweight mechanism. The counterweight mechanism includes an extension member and a load-bearing member mounted on the extension member. The load-bearing member is used to place a counterweight block. The extension member is rotatably connected to the support mechanism, and its rotation axis is parallel to the horizontal plane. The heating mechanism includes an upper heating plate mounted on the extension member and a lower heating plate mounted on the support mechanism. When the apparatus is in operation, the upper heating plate and the lower heating plate are parallel to each other.

[0007] In the above scheme, when the sintering test is carried out, a certain amount of silver soldering paste is first coated on one side of a gold-plated plate sample, and then another gold-plated plate sample is attached to the silver soldering paste coated area. Then, the two attached gold-plated plate samples are placed horizontally on the lower heating plate. Then, the extension member is rotated so that the upper and lower heating plates are parallel and respectively abut against the two sides of the gold-plated plate sample. Then, a certain mass of counterweight is placed on the load-bearing member so that the upper and lower heating plates exert a certain pressure on the gold-plated plate sample. The uniform and stable pressure provided by the parallel upper and lower heating plates on the gold-plated plate sample makes the test result more accurate. The upper and lower heating plates will heat the gold-plated plate sample after being powered on. The heat is transferred to the silver soldering paste through the gold-plated plate sample. When the silver soldering paste is heated, the small particle silver powder on its surface partially melts and wets each other, so that the two gold-plated plate samples are firmly sintered together. The pressure during the entire experiment is only provided by the counterweight, which can be adjusted according to the required pressure. Manual additional force is not required, which is more stable and the experimental result is more accurate.

[0008] Further, the load-bearing member includes a sliding block and a tray mounted on the sliding block, and the extension member includes a scale lever and a rotating portion at one end of the scale lever. The sliding block is in sliding connection with the scale lever, and the rotating portion is in rotating connection with the support mechanism. Since the mass of a single counterweight is fixed, when a counterweight of a certain mass is placed on the tray, it is difficult to combine precise values. At this time, the distance between the sliding block and the rotating portion can be adjusted by observing the scale on the scale lever to further adjust the pressure, which is more accurate.

[0009] Further, the upper heating plate is located between the sliding block and the rotating portion. The distance from the sliding block to the rotating portion is greater than the distance from the upper heating plate to the rotating portion. According to the principle of lever, the counterweight mechanism can provide greater pressure.

[0010] Further, the counterweight mechanism further includes a locking member mounted on the sliding block, and the locking member is used to fix the position of the sliding block on the scale lever. The locking member can fix the sliding block at a certain position on the scale lever to prevent relative sliding between the sliding block and the scale lever, so that the pressure provided by the counterweight mechanism is constant, and the experimental result is more accurate.

[0011] Further, the inner wall of the sliding groove is fixed with a limiting rod, the locking member is in threaded connection with the sliding block, and one end of the locking member abuts against the scale lever. By rotating the locking member, one end of the locking member abuts against the scale lever and exerts a continuous pressing force, thereby realizing the fixation of the locking member.

[0012] Further, the support mechanism comprises a base and an adjusting member mounted on the base, the adjusting member abuts against or is fixedly connected with the bottom of the lower heating plate, and the adjusting member is used for adjusting the height of the lower heating plate. After the two gold-plated plate samples are placed horizontally on the lower heating plate, the height between the upper heating plate and the lower heating plate can be adjusted by the adjusting member, so that the upper heating plate and the lower heating plate are parallel and closely attached to the sample, and the silver soldering paste with different thicknesses can be heated, and the applicability is better.

[0013] Further, the adjusting member abuts against the bottom of the lower heating plate, and the adjusting member is threadedly connected with the base in the vertical direction. By rotating the adjusting member, the adjusting member moves in the vertical direction relative to the base, and the adjusting member can abut against and push the lower heating plate to move up and down, so that the distance between the upper heating plate and the lower heating plate is adjusted. The threaded connection operation is convenient, the adjusting precision is high, and the attachment among the upper heating plate, the lower heating plate and the sample is more closely.

[0014] Further, the bottom of the adjusting member is further provided with a displacement sensor, and the displacement sensor is used for measuring the distance between the bottom of the adjusting member and the base. By measuring the distance between the bottom of the adjusting member and the base, the distance between the upper heating plate and the lower heating plate is reflected, and the size of the gap reserved between the upper heating plate and the lower heating plate is basically consistent with the sample to be measured.

[0015] Further, the upper heating plate and the lower heating plate are both internally provided with cooling channels. After sintering is completed, gas or liquid can be introduced into the cooling pipeline to cool the upper heating plate and the lower heating plate, so that the sample is rapidly cooled and formed, and then the sample is taken out to complete sintering.

[0016] Further, the base is provided with a cooling flow channel with two open ends, the cooling flow channel is in communication with the cooling channel, the opening of the cooling flow channel is long strip-shaped and the length thereof extends in the vertical direction, and the cooling pipe penetrates into the cooling flow channel from one end of the opening of the cooling flow channel, passes through the cooling channel, and penetrates out from the other end of the opening of the cooling flow channel. Since the opening of the cooling flow channel is long strip-shaped and the length thereof extends in the vertical direction, the cooling pipe can move in the vertical direction in the cooling flow channel, and the cooling pipe penetrates through the lower heating plate, so that the lower heating plate can also only move in the vertical direction. When the locking member is rotated, the lower heating plate will not rotate with the locking member in the rotating process of the locking member, so that the cooling pipe will not rotate, and cooling is facilitated.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The extension rotates around the support mechanism, so that the upper heating plate and the lower heating plate are parallel and abut against the two sides of the sample. By adding or removing the counterweight, the upper heating plate and the lower heating plate apply continuous and stable pressure to the gold-plated plate sample. The pressure in the entire experimental process is provided only by the counterweight. The weight of the counterweight can be adjusted according to the required pressure. No additional force is required by manual intervention, resulting in better stability and more accurate experimental results.

[0019] 2. The adjusting component moves vertically relative to the base. The adjusting component can resist and push the lower heating plate to move up and down, thereby adjusting the distance between the upper heating plate and the lower heating plate, making the upper heating plate and the lower heating plate parallel and in close contact with the sample. It can be used to heat silver solder paste of different thicknesses, and has better applicability.

[0020] 3. The design of the cooling pipe and the strip-shaped hollow groove can not only achieve cooling and temperature reduction, enabling rapid sample molding, but also prevent the lower heating plate from rotating with the locking component during the rotation of the locking component, resulting in better sintering effect and more accurate experimental results. Attached Figure Description

[0021] Figure 1 A front view of a pressure-controlled hot pressing sintering apparatus;

[0022] Figure 2 Left view of a pressure-controlled hot pressing sintering apparatus;

[0023] Figure 3 A top view of a pressure-controlled hot pressing sintering apparatus;

[0024] Figure 4 This is a structural schematic diagram of the adjusting components and cooling pipes;

[0025] Figure 5 This is a schematic diagram of the support device.

[0026] In the attached diagram: 100, support mechanism; 110, base; 111, perforated groove; 120, adjusting component; 200, heating mechanism; 210, lower heating plate; 220, upper heating plate; 300, counterweight mechanism; 310, extension component; 311, scale lever; 312, rotating part; 320, load-bearing component; 321, sliding block; 322, tray; 330, locking component; 400, cooling pipe; 500, counterweight. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1

[0030] This embodiment is a first embodiment of a pressure-controllable hot pressing sintering apparatus, such as... Figures 1-3 As shown, the system includes a support mechanism 100, a heating mechanism 200, and a counterweight mechanism 300. The counterweight mechanism 300 includes a long, narrow extension 310, a locking member 330, and a load-bearing member 320 mounted on the extension 310. The load-bearing member 320 includes a sliding block 321 and a tray 322 mounted on the sliding block 321. The tray 322 is used to hold the counterweight 500. In this embodiment, the counterweight can be a weight of various masses. The extension 310 includes a graduated lever 311 and a rotating part 312 located at one end of the graduated lever 311. The sliding block 321 slides with the graduated lever 311. The rotating part 312 is rotatably connected to the support mechanism 100 and its rotation axis is parallel to the horizontal plane. The heating mechanism 200 includes an upper heating plate 220 installed on the extension 310 and a lower heating plate 210 installed on the support mechanism 100. The upper heating plate 220 is located between the sliding block 321 and the rotating part 312. When the device is in working condition, the upper heating plate 220 and the lower heating plate 210 are parallel to each other. In this embodiment, the locking member 330 is a fastening bolt. The locking member 330 is threadedly connected to the sliding block 321, and one end of the locking member 330 abuts against the scale lever 311.

[0031] The working principle of this embodiment is as follows:

[0032] When the sintering test is performed, a certain amount of silver soldering paste is first coated on one side of a gold-plated plate sample, and then another gold-plated plate sample is attached to the area coated with silver soldering paste. Then, the two attached gold-plated plate samples are placed horizontally on the lower heating plate 210. Then, the scale lever 311 is rotated around the support mechanism 100, so that the upper heating plate 220 and the lower heating plate 210 are parallel and abut against the two sides of the gold-plated plate sample, respectively. Then, a certain mass of counterweight 500 is placed on the tray 322, so that the gravity of the counterweight 500 approaches the required pressure, and the coarse adjustment is completed. Then, the locking member 330 is loosened, so that the sliding block 321 can slide relative to the scale lever 311. Then, while observing the scale on the scale lever 311, the distance between the sliding block 321 and the rotating part 312 is adjusted, and then the locking member 330 is tightened, so that the pressure is further adjusted, the fine adjustment is realized, and the upper heating plate 220 and the lower heating plate 210 apply a continuous and stable pressure to the gold-plated plate sample. At the same time, the upper heating plate 220 and the lower heating plate 210 are powered on to heat the gold-plated plate sample. The heat is transferred to the silver soldering paste through the gold-plated plate sample. When the silver soldering paste is heated, the small particle silver powder on its surface partially melts and wets each other, so that the two gold-plated plate samples are firmly sintered together. The pressure during the entire experiment is only provided by the counterweight 500, and the weight of the counterweight 500 can be adjusted according to the required pressure. No additional manual force is required, the stability is better, and the experimental results are more accurate.

[0033] Example Two

[0034] This embodiment is a second embodiment of a pressure-controllable hot-press sintering device. This embodiment is similar to the first embodiment, except that, as shown in Figure 4 The support mechanism 100 includes a base 110 and an adjusting member 120 mounted on the base 110. The adjusting member 120 abuts against the bottom of the lower heating plate 210. The adjusting member 120 is threadedly connected with the base 110 in the vertical direction. The bottom of the adjusting member 120 is also provided with a displacement sensor for measuring the distance between the bottom of the adjusting member 120 and the base 110.

[0035] The working principle of this embodiment is as follows:

[0036] After the two gold-plated plate samples are placed horizontally on the lower heating plate 210, the adjusting member 120 is rotated to move the adjusting member 120 relative to the base 110 in the vertical direction, so that the height between the upper heating plate 220 and the lower heating plate 210 changes, and the upper heating plate 220, the lower heating plate 210 and the sample are tightly fitted, which can be used for heating silver solder paste of different thicknesses, and has better applicability. By rotating the adjusting member 120, the adjusting member 120 is moved relative to the base 110 in the vertical direction, and the adjusting member 120 can push the lower heating plate 210 up and down to adjust the distance between the upper heating plate 220 and the lower heating plate 210, so that the upper heating plate 220 and the lower heating plate 210 are parallel and the fit between the upper heating plate 220 and the lower heating plate 210 and the sample is tighter. The threaded connection operation is convenient, the adjustment precision is high, the displacement sensor measures the distance between the bottom of the adjusting member 120 and the base 110, so as to reflect the distance between the upper heating plate 220 and the lower heating plate 210, and ensure that the size of the gap reserved between the upper heating plate 220 and the lower heating plate 210 is basically consistent with the sample to be measured.

[0037] Example three

[0038] This embodiment is a third embodiment of a pressure-controllable hot-pressing sintering device. This embodiment is similar to the first and second embodiments, except that, as shown in Figs. Figure 4 and Figure 5 The upper heating plate 220 and the lower heating plate 210 are provided with U-shaped cooling channels inside, the base 110 is provided with a cooling flow channel 111 with open ends, the cooling flow channel 111 is in communication with the cooling channels, and the cooling pipe 400 penetrates from one end of the cooling flow channel 111, passes through the cooling channels, and penetrates from the other end of the cooling flow channel 111. In this embodiment, the cooling pipe 400 is a gas cooling pipe, which can be filled with cooling gas. The opening of the cooling flow channel 111 is long and its length extends in the vertical direction. The width of the opening in the vertical direction is wider than the width in the horizontal direction, and the width of the opening in the horizontal direction is close to the diameter of the cooling pipe 400, for example, the width of the opening in the horizontal direction is not more than 2mm different from the diameter of the cooling pipe 400.

[0039] The working principle of this embodiment is as follows:

[0040] After sintering is completed, cooling gas can be filled in the cooling channel 400 to cool the upper heating plate 220 and the lower heating plate 210, so that the sample is rapidly cooled and formed, and then the sample is taken out to complete sintering. Since the opening of the cooling flow channel 111 is long strip-shaped and the width in the vertical direction is wider than the width in the horizontal direction, the diameter of the cooling pipe 400 is close to the width in the horizontal direction of the opening, so the cooling pipe 400 can move in the vertical direction in the cooling flow channel 111. The cooling pipe 400 passes through the lower heating plate 210, so the lower heating plate 210 can also only move in the vertical direction. When the rotating locking member 330 rotates, the lower heating plate 210 will not rotate with the locking member 330 during the rotation of the locking member 330, so the cooling pipe 400 will not rotate, which is convenient for filling cooling gas.

[0041] In the specific contents of the above specific embodiments, any inconsistent combination of technical features can be combined, in order to make the description simple, all possible combinations of the above technical features are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0042] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A pressure-controllable hot pressing sintering apparatus, characterized in that, The device comprises a supporting mechanism (100), a heating mechanism (200) and a counterweight mechanism (300), the counterweight mechanism (300) comprises an extension piece (310) and a bearing piece (320) mounted on the extension piece (310), the bearing piece (320) is used for placing a counterweight (500), the extension piece (310) is rotationally connected with the supporting mechanism (100) and the rotation axis thereof is parallel to the horizontal plane, the heating mechanism (200) comprises an upper heating plate (220) mounted on the extension piece (310) and a lower heating plate (210) mounted on the supporting mechanism (100), when the device is in the working state, the upper heating plate (220) and the lower heating plate (210) are parallel to each other.

2. A pressure-controllable hot-press sintering device according to claim 1, wherein The bearing piece (320) comprises a sliding block (321) and a tray (322) mounted on the sliding block (321), the extension piece (310) comprises a scale lever (311) and a rotating part (312) located at one end of the scale lever (311), the sliding block (321) is slidingly connected with the scale lever (311), and the rotating part (312) is rotationally connected with the supporting mechanism (100).

3. A pressure-controllable hot-press sintering device according to claim 2, wherein The upper heating plate (220) is located between the sliding block (321) and the rotating part (312).

4. The pressure-controllable hot-press sintering device according to claim 2, wherein The counterweight mechanism (300) further comprises a locking piece (330) mounted on the sliding block (321), and the locking piece (330) is used for fixing the position of the sliding block (321) on the scale lever (311).

5. A pressure-controllable hot-press sintering apparatus according to claim 4, wherein The locking piece (330) is threadedly connected with the sliding block (321), and one end of the locking piece (330) abuts against the scale lever (311).

6. The pressure-controllable hot-press sintering device according to claim 1, wherein The supporting mechanism (100) comprises a base (110) and an adjusting piece (120) mounted on the base (110), the adjusting piece (120) abuts against or is fixedly connected with the bottom of the lower heating plate (210), and the adjusting piece (120) is used for adjusting the height of the lower heating plate (210).

7. A pressure-controllable hot-press sintering apparatus according to claim 6, wherein The adjusting piece (120) abuts against the bottom of the lower heating plate (210), and the adjusting piece (120) is threadedly connected with the base (110) in the vertical direction.

8. A pressure-controllable hot-press sintering device according to claim 7, wherein The bottom of the adjusting piece (120) is further provided with a displacement sensor, and the displacement sensor is used for measuring the distance between the bottom of the adjusting piece (120) and the base (110).

9. A pressure-controllable hot-press sintering apparatus according to any one of claims 6 to 8, characterized in that, The inside of the upper heating plate (220) and the inside of the lower heating plate (210) are both provided with cooling channels.

10. A pressure-controllable hot-press sintering apparatus according to claim 9, wherein The base (110) is provided with a cooling flow channel (111) with two open ends, the cooling flow channel (111) is in communication with the cooling channels, the opening of the cooling flow channel (111) is in the shape of a long strip and the length thereof extends in the vertical direction, a cooling pipe (400) penetrates into the cooling flow channel (111) from one end of the opening, passes through the cooling channels and penetrates out of the other end of the opening of the cooling flow channel (111).

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