Ultrathin-wall precision ceramic tube machining device

Abstract

The utility model discloses an ultra-thin wall type precision ceramic tube processing device which comprises an upper punching die, a burning carrier is slidably connected to the outer side of the upper punching die, ceramic powder is arranged in the burning carrier, a lower punching die is slidably connected to the inner portion of the burning carrier, and the lower punching die is connected with the lower punching die. The upper punching die, the outer side of the ceramic powder and the interior of the burning carrier are all provided with die coatings, the top of the burning carrier is provided with a ceramic biscuit, the interior of the ceramic biscuit is provided with an auxiliary burning substance, the proper auxiliary burning substance is introduced during sintering, and in a high-temperature environment, when the ceramic biscuit shrinks to form a high-temperature green body, the shrinkage is inconsistent, and the temperature of the high-temperature green body is increased. The auxiliary sintering substance can support the deformation of the green body when forming a high temperature, and after sintering is completed, the auxiliary sintering substance shrinks at the high temperature and can be easily stripped from the corrected green body without influencing the final size of the product, so that the ultrathin-wall ceramic production process is broken through, normal mass production of the ultrathin-wall ceramic can be realized, and the requirements of customers on different product structures are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the precise ceramic processing technical field, concretely relates to a kind of ultra-thin wall type precise ceramic tube processing device. BACKGROUND

[0002] In the field of precise ceramics, due to the characteristics of high hardness, high strength, high insulation, high temperature resistance, corrosion resistance, etc., ceramics are widely used in connectors in the field of petrochemical industry, connectors in the field of aerospace, connectors of instruments and meters. In this field, due to the high requirements of equipment or device on space and volume, it is required to reduce the volume of precise ceramic tube as much as possible, i.e. to require the ceramic tube to have ultra-thin wall and large length-diameter ratio (Note: the thin wall referred to in this paper is ≤0.2mm, and the length-diameter ratio is greater than 3). However, the manufacturing of thin-wall precise ceramic tube has always been a problem in the industry.

[0003] The industry usually adopts dry pressing method or injection molding method, but due to the thin wall, it is difficult to uniformly fill the powder or slurry into the mold cavity, resulting in uneven density of the green body, and inconsistent shrinkage ratio after sintering. When subsequent processing is used for correction, due to the thin wall, a large number of breakages occur during grinding, and therefore the ultra-thin wall ceramic tube cannot be mass-produced. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and to provide an ultra-thin wall type precise ceramic tube processing device to solve the problem of mass production of ultra-thin wall ceramic tube, which is difficult to achieve due to the thin wall, the difficulty of uniformly filling the powder or slurry into the mold cavity, the uneven density of the green body, the inconsistent shrinkage ratio after sintering, and the large number of breakages during grinding when subsequent processing is used for correction.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an ultra-thin wall type precise ceramic tube processing device, comprising an upper punch, a burn-supporting carrier is slidably connected to the outside of the upper punch, ceramic powder is arranged inside the burn-supporting carrier, a lower punch is slidably connected to the inside of the burn-supporting carrier, a mold coating is arranged on the outside of the upper punch, the ceramic powder and the inside of the burn-supporting carrier, and a ceramic blank is arranged on the top of the burn-supporting carrier, and an auxiliary sintering material is arranged inside the ceramic blank.

[0006] Preferably, the material of the mold coating is diamond-like carbon film.

[0007] Preferably, the auxiliary sintering material forms a high-temperature auxiliary sintering material under high-temperature sintering.

[0008] Preferably, the ceramic blank forms a high-temperature blank under high-temperature sintering.

[0009] Preferably, the high-temperature body sintering is completed and the modified body is formed under cooling condition.

[0010] Preferably, the thermal expansion coefficient of the modified body is lower than that of the auxiliary sintering material, that is, the shrinkage of the auxiliary sintering material is greater than that of the modified body.

[0011] Preferably, the auxiliary sintering material is an aluminum-containing ceramic.

[0012] Preferably, the upper punch and the lower punch are of the same size.

[0013] Compared with the prior art, the ultra-thin-wall precision ceramic pipe processing device has the following beneficial effects:

[0014] 1、The mold coating is arranged, the friction between the upper punch, the bearing sintering carrier and the lower punch and the ceramic powder is reduced, the ceramic powder can be uniformly filled into the mold cavity, the flowability of the powder during filling is improved, the compactness of the body is increased, and the deformation amount is reduced.

[0015] 2、The auxiliary sintering material is arranged, the appropriate auxiliary sintering material is introduced during sintering, the ceramic body shrinks inconsistently when the ceramic body shrinks to form a high-temperature body in a high-temperature environment, the auxiliary sintering material can support the deformation of the body when the auxiliary sintering material is high-temperature, the auxiliary sintering material shrinks back to the auxiliary sintering material after sintering is completed, and the auxiliary sintering material can be easily separated from the modified body without affecting the final size of the product, which breaks through the ultra-thin-wall ceramic production process, enables normal mass production, and meets the needs of customers for different product structures.

[0016] The parts not involved in the device are the same as or can be realized by the prior art, the structure of the device is scientific and reasonable, safe and convenient to use, and great help is provided for people. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings are used to provide further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application, in the drawings:

[0018] Figure 1 A dry pressing structure schematic view of the ultra-thin-wall precision ceramic pipe processing device is provided for the present application;

[0019] Figure 2 An auxiliary sintering material structure schematic view of the ultra-thin-wall precision ceramic pipe processing device is provided for the present application;

[0020] Figure 3 A ceramic sintering stress structure schematic view of the ultra-thin-wall precision ceramic pipe processing device is provided for the present application;

[0021] Figure 4 A stress structure schematic view after ceramic sintering of the ultra-thin-wall type precision ceramic pipe machining device is provided in the utility model.

[0022] In the figure: upper punch 1, bearing carrier 2, ceramic powder 3, mold coating 4, lower punch 5, ceramic body 6, auxiliary sintering material 7, high-temperature auxiliary sintering material 8, high-temperature body 9, modified body 10. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides a technical scheme: a kind of ultra-thin-wall type precision ceramic pipe machining device, including upper punch 1, upper punch 1 outside slide connection has bearing carrier 2, bearing carrier 2 inside is provided with ceramic powder 3, bearing carrier 2 inside slide connection has lower punch 5, upper punch 1, ceramic powder 3 outside and bearing carrier 2 inside are all provided with mold coating 4, reduce the friction between upper punch 1, bearing carrier 2 and lower punch 5 and ceramic powder 3, so that ceramic powder 3 can be evenly filled into mold cavity, improve the fluidity of powder when filling, increase the compactness of body, thereby reduce deformation amount, bearing carrier 2 top is provided with ceramic body 6, and ceramic body 6 inside is provided with auxiliary sintering material 7.

[0025] In the utility model, preferably, the material of mold coating 4 is diamond-like carbon film.

[0026] In the utility model, preferably, auxiliary sintering material 7 forms high-temperature auxiliary sintering material 8 under high-temperature sintering, and ceramic body 6 shrinks to form high-temperature body 9 under high-temperature environment, and the shrinkage is inconsistent, and auxiliary sintering material 7 forms high-temperature auxiliary sintering material 8 under high temperature, which can support the deformation of body.

[0027] In the utility model, preferably, ceramic body 6 forms high-temperature body 9 under high-temperature sintering.

[0028] In the utility model, preferably, high-temperature body 9 forms modified body 10 after cooling after sintering.

[0029] The utility model discloses, preferably, the thermal expansion coefficient of the modified blank 10 is lower than the thermal expansion coefficient of the auxiliary sinter 7, that is, the shrinkage of the auxiliary sinter 7 is greater than the shrinkage of the modified blank 10, and the auxiliary sinter 8 can be easily separated from the modified blank 10 at high temperature after sintering is completed without affecting the final size of the product, breaking through the ultra-thin-wall ceramic production process, enabling normal mass production and meeting the needs of customers for different product structures.

[0030] The utility model discloses, preferably, the auxiliary sinter 7 material is aluminum-containing ceramic.

[0031] The utility model discloses, preferably, the upper punch die 1 and lower punch die 5 size are identical.

[0032] The working principle and use flow of the utility model are as follows: when using, ceramic powder 3 is added in the inside of the bearing carrier 2, the outside of the upper punch die 1 and lower punch die 5 and the inside of the bearing carrier 2 are all provided with die coating 4, the die coating 4 has good dispersity and good lubricity when being pressed with the ceramic powder 3, that is, the relative friction coefficient is low, the ceramic powder 3 can be evenly filled into the die cavity, the flowability of the powder when filling is improved, the compactness of the blank is increased, thereby reducing the deformation amount, then the ceramic blank 6 is placed on the bearing carrier 2 and enters the high-temperature sintering furnace for sintering, the auxiliary sinter 7 is introduced in the ceramic blank 6 during the sintering process, the auxiliary sinter 7 can expand to the required size of the inner diameter of the ceramic tube at high temperature, the auxiliary sinter 8 supports the deformation of the blank at high temperature, and the deformation amount can be effectively reduced, the auxiliary sinter 8 and the high-temperature blank 9 are all cooled and shrunk due to the reduction of temperature during the cooling process of the product after sintering is completed, the thermal expansion coefficient of the auxiliary sinter 7 is higher than the thermal expansion coefficient of the ceramic blank 6, that is, the shrinkage of the auxiliary sinter 8 is greater than the shrinkage of the high-temperature blank 9, so that the auxiliary sinter 7 can be easily separated from the modified blank 10 without affecting the final size of the product, breaking through the ultra-thin-wall ceramic production process, enabling normal mass production and meeting the needs of customers for different product structures.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A processing device for ultra-thin-walled precision ceramic tubes, comprising an upper punch die (1), characterized in that: The upper punch (1) is slidably connected to a firing carrier (2), and ceramic powder (3) is provided inside the firing carrier (2). The lower punch (5) is slidably connected inside the firing carrier (2). The upper punch (1), the outer side of the ceramic powder (3) and the inside of the firing carrier (2) are all provided with a mold coating (4). A ceramic blank (6) is provided on the top of the firing carrier (2), and auxiliary firing materials (7) are provided inside the ceramic blank (6).

2. The ultra-thin-walled precision ceramic tube processing device according to claim 1, characterized in that: The mold coating (4) is made of diamond-like carbon film.

3. The ultra-thin-walled precision ceramic tube processing device according to claim 1, characterized in that: The auxiliary material (7) is sintered at high temperature to form a high-temperature auxiliary material (8).

4. The ultra-thin-walled precision ceramic tube processing device according to claim 1, characterized in that: The ceramic blank (6) is sintered at high temperature to form a high-temperature blank (9).

5. The ultra-thin-walled precision ceramic tube processing device according to claim 4, characterized in that: After the high-temperature blank (9) is sintered, a modified blank (10) is formed under cooling conditions.

6. The ultra-thin-walled precision ceramic tube processing device according to claim 5, characterized in that: The coefficient of thermal expansion of the modified blank (10) is lower than that of the auxiliary material (7), that is, the shrinkage of the auxiliary material (7) is greater than that of the modified blank (10).

7. The ultra-thin-walled precision ceramic tube processing device according to claim 1, characterized in that: The auxiliary material (7) is made of aluminum-containing ceramics.

8. The ultra-thin-walled precision ceramic tube processing device according to claim 1, characterized in that: The upper punch (1) and the lower punch (5) are the same size.

Images