Novel electric control pressurization type vacuum hot pressing furnace

Abstract

The utility model belongs to the technical field of vacuum hot pressing sintering application, and particularly discloses a novel electric control pressurization type vacuum hot pressing furnace which comprises a skid-mounted base, an upper pressing air cylinder, n vacuum cavity mounting frames, a vacuum cavity connecting part, an upper sliding pressing rod, a lower sliding pressing rod, an upper sliding pressing rod through groove, an upper sealing part, a lower sealing part and the like. Compared with a traditional vacuum hot-pressing furnace, the double-air-cylinder pressurizing type vacuum hot-pressing furnace has the advantages that the hot-pressing forming time is greatly shortened, the product manufacturing efficiency is improved, meanwhile, bidirectional pressurizing is achieved, instant sufficient power is provided for manufacturing of large-size vacuum hot-pressing sintering products, and the production efficiency is improved. Good compactness of a hot pressed and sintered product is guaranteed, and the strength and wear resistance of the product are improved; and due to the design of an upper circular driving plate with limiting holes, a lower circular driving plate with limiting holes, a group of upper limiting columns and a group of lower limiting columns, precise vertical limiting during bidirectional sliding is realized, stable hot pressing sintering action is completed, and the product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum hot pressing and sintering application, and specifically relates to a novel electrically controlled pressurized vacuum hot pressing furnace, which is used for improving the efficiency and quality of hot pressing and sintering products. Background Art

[0002] The vacuum hot pressing furnace is a cycle operation type and is widely used in hot pressing and sintering of cemented carbide, functional ceramics, powder metallurgy, etc. under high temperature and high vacuum conditions. It can also be hot pressed and sintered under gas protection.

[0003] The applicant searched and found that the application numbers / patent numbers are CN202021824081.4, CN202220745196.7, and CN202021235676.6. The pressurized drive components in the technical solutions disclosed are all single-cylinder pressure vacuum sintering designs.

[0004] The single-cylinder pressure vacuum sintering design has the problem of low hot pressing and sintering efficiency when used. That is, in order to ensure the forming of the vacuum hot pressing and sintering products, it is necessary to maintain the pressure action for a long time, which is time-consuming and also has the problem of poor density, especially for the production of large-sized vacuum hot pressing and sintering products.

[0005] Therefore, based on the above problems, the utility model provides a novel electrically controlled pressurized vacuum hot pressing furnace. Utility Model Content

[0006] Purpose of the utility model: The purpose of the utility model is to provide a new type of electrically controlled pressurized vacuum hot pressing furnace to solve the technical problems existing in the design of single-cylinder pressure vacuum sintering in the background technology, namely, bidirectional vacuum hot pressing sintering, which greatly shortens the hot pressing molding time and improves product manufacturing efficiency.

[0007] Technical solution: The utility model is a new type of electrically controlled pressurized vacuum hot pressing furnace, comprising a skid-mounted base, a horizontal table, a vertical frame, a vacuum chamber with a door, an upper graphite plate with an electric heating tube, and a lower graphite plate with an electric heating tube. The horizontal table and the vertical frame are respectively vertically mounted with a down-pressing cylinder and an up-pressing cylinder. On the horizontal table and in the vertical frame, n vacuum chamber mounting frames are arranged. The upper inner wall of the n vacuum chamber mounting frames is symmetrically provided with a vacuum chamber connecting portion. The down-pressing cylinder and the up-pressing cylinder are respectively provided with an upper sliding pressure rod and a lower sliding pressure rod. A dynamic pressure rod, an upper sliding pressure rod through groove and a lower sliding pressure rod through groove are arranged in the vertical center line end face of the vacuum chamber with a door, and the upper sliding pressure rod and the lower sliding pressure rod are respectively provided with an upper sealing part and a lower sealing part used in conjunction with the upper sliding pressure rod through groove and the lower sliding pressure rod through groove; wherein, the upper electric heating tube graphite disk and the lower electric heating tube graphite disk are respectively arranged on the opposite end faces of the upper sliding pressure rod and the lower sliding pressure rod, and form a pressing structure, and the upper sealing part and the lower sealing part are respectively tightly fitted with the upper sliding pressure rod through groove and the lower sliding pressure rod through groove.

[0008] The technical solution of the present invention is that the novel electrically controlled pressurized vacuum hot pressing furnace also includes an upper circular driving plate with limiting holes and a lower circular driving plate with limiting holes, respectively arranged on the upper sliding pressure rod and the lower sliding pressure rod, and at least one group of upper limiting columns with one end connected to the upper end face of the vacuum chamber connecting part and the other end connected to the upper inner wall of the vacuum chamber mounting frame, and at least one group of lower limiting columns with one end connected to the end face of the horizontal table and the other end connected to the upper end face of the vacuum chamber connecting part; wherein, the upper limiting columns and the lower limiting columns respectively penetrate the upper circular driving plate with limiting holes and the lower circular driving plate with limiting holes, and are tightly fitted with the upper circular driving plate with limiting holes and the lower circular driving plate with limiting holes, the upper pressure cylinder and the upper sliding pressure rod are respectively arranged to be connected to the two sides of the upper circular driving plate with limiting holes, and the lower pressure cylinder and the lower sliding pressure rod are respectively arranged to be connected to the two sides of the lower circular driving plate with limiting holes.

[0009] In the technical solution, the novel electrically controlled pressurized vacuum hot pressing furnace also includes an upper conical reinforcement portion arranged on the connecting surface of the upper sliding pressure rod and the upper circular driving plate with limiting holes, and a lower conical reinforcement portion arranged on the connecting surface of the lower sliding pressure rod and the lower circular driving plate with limiting holes.

[0010] In the technical solution of the present invention, the vacuum chamber connecting portion is configured as a vertical rectangular structure, and the connecting surface with the vacuum chamber with a door is configured as a plate structure or an arc structure.

[0011] Compared with the prior art, the beneficial effects of the new type of electrically controlled pressurized vacuum hot pressing furnace of the utility model are: 1. Compared with the traditional single-power cylinder pressurized vacuum hot pressing furnace, the design of the double-cylinder pressurized vacuum hot pressing furnace is adopted, which greatly shortens the hot pressing forming time and improves the product production efficiency. At the same time, the two-way pressure is applied to provide instantaneous and sufficient power for the production of large-sized vacuum hot pressing and sintering products, ensuring the good density of the hot pressing and sintering products, and improving the strength and wear resistance of the products; 2. The added upper circular driving plate with limiting holes, the lower circular driving plate with limiting holes, a group of upper limiting columns and a group of lower limiting columns are designed to realize precise vertical limiting during two-way sliding, complete stable hot pressing and sintering action, and improve product quality; 3. The added upper conical reinforcement part and the lower conical reinforcement part respectively realize the enhancement of the compressive strength of the upper sliding pressure rod and the upper circular driving plate with limiting holes, and complete reliable hot pressing and sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of a new type of electrically controlled pressurized vacuum hot pressing furnace of the utility model;

[0014] Among them, the serial numbers in the figure are as follows: 100-skid-mounted base, 101-horizontal table, 102-vertical frame, 103-downward pressure cylinder, 104-upper pressure cylinder, 105-n vacuum chamber mounting frame, 106-lower conical reinforcement, 107-vacuum chamber connecting part, 108-vacuum chamber with door, 109-upper graphite disk with electric heating tube, 110-lower graphite disk with electric heating tube, 111-upper sliding pressure rod, 112-lower sliding pressure rod, 113-upper sliding pressure rod through groove, 114-lower sliding pressure rod through groove, 115-upper sealing part, 116-lower sealing part, 117-upper circular driving plate with limiting holes, 118-upper limiting column, 119-upper conical reinforcement, 120-lower circular driving plate with limiting holes, 121-lower limiting column. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with 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 of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0017] like Figure 1 The novel electrically controlled pressurized vacuum hot pressing furnace shown in the figure comprises a skid-mounted base 100, a horizontal table 101, a vertical frame 102, a vacuum chamber with a door 108, an upper graphite plate with an electric heating tube 109 and a lower graphite plate with an electric heating tube 110.

[0018] A downward pressure cylinder 103 and an upward pressure cylinder 104 are respectively vertically mounted on the horizontal table 101 and the vertical frame 102.

[0019] A vacuum chamber mounting frame 105 is disposed on the horizontal table 101 and inside the vertical frame 102.

[0020] The upper inner wall of the vacuum chamber mounting frame 105 is symmetrically provided with a vacuum chamber connecting portion 107.

[0021] The lower pressure cylinder 103 and the upper pressure cylinder 104 are respectively provided with an upper sliding pressure rod 111 and a lower sliding pressure rod 112.

[0022] An upper sliding rod through slot 113 and a lower sliding rod through slot 114 are provided in the vertical center line end surface of the vacuum chamber 108 with door.

[0023] The upper sliding rod 111 and the lower sliding rod 112 are respectively provided with an upper sealing portion 115 and a lower sealing portion 116 used in conjunction with the upper sliding rod through groove 113 and the lower sliding rod through groove 114;

[0024] Among them, the upper electric heating tube graphite disk 109 and the lower electric heating tube graphite disk 110 are respectively arranged on the opposite end faces of the upper sliding pressure rod 111 and the lower sliding pressure rod 112, and form a pressing structure, and the upper sealing part 115 and the lower sealing part 116 are tightly fitted with the upper sliding pressure rod groove 113 and the lower sliding pressure rod groove 114 respectively, to achieve a tight vacuum seal for the vacuum hot pressing sintering operation.

[0025] The electric control system used in conjunction with the upper graphite disk 109 with electric heating tubes and the lower graphite disk 110 with electric heating tubes; the vacuum pumping system used in conjunction with the vacuum chamber 108 with a door; and the hydraulic system used in conjunction with the lower pressure cylinder 103 and the upper pressure cylinder 104 are not shown in the figures and do not affect the disclosure of the technical solution of the present application. Example

[0026] On the basis of the first embodiment, the novel electrically controlled pressurized vacuum hot pressing furnace further includes an upper circular driving plate 117 with a limiting hole and a lower circular driving plate 120 with a limiting hole, which are respectively arranged on the upper sliding pressure rod 111 and the lower sliding pressure rod 112, and at least one group of upper limiting columns 118 connected to the upper end surface of the vacuum chamber connecting part 107 at one end and to the upper inner wall of the vacuum chamber mounting frame 105 at the other end, and at least one group of lower limiting columns 121 connected to the end surface of the horizontal table 101 at one end and to the upper end surface of the vacuum chamber connecting part 107 at the other end;

[0027] Among them, the upper limit column 118 and the lower limit column 121 respectively penetrate the upper circular driving plate 117 with limiting holes and the lower circular driving plate 120 with limiting holes, and are tightly fitted with the upper circular driving plate 117 with limiting holes and the lower circular driving plate 120 with limiting holes. The upper pressure cylinder 104 and the upper sliding pressure rod 111 are respectively connected to the two sides of the upper circular driving plate 117 with limiting holes, and the lower pressure cylinder 103 and the lower sliding pressure rod 112 are respectively connected to the two sides of the lower circular driving plate 120 with limiting holes, so as to realize precise and stable stroke action during relatively vertical sliding hot pressing. Example

[0028] On the basis of Example 1 or Example 2, the new electrically controlled pressurized vacuum hot pressing furnace also includes an upper conical reinforcement portion 119 arranged on the connecting surface of the upper sliding pressure rod 111 and the upper circular driving plate 117 with limiting holes, and a lower conical reinforcement portion 106 arranged on the connecting surface of the lower sliding pressure rod 112 and the lower circular driving plate 120 with limiting holes, so as to enhance the strength of the above-mentioned connecting surfaces and ensure that pressure is applied firmly and safely.

[0029] In addition, the preferred vacuum chamber connection portion 107 is configured as a vertical rectangular structure, and the connection surface with the vacuum chamber with door 108 is configured as a plate structure or an arc structure. The above design enables assembly and use with vacuum chambers with doors 108 of different shapes.

[0030] The structural principle or working principle of the new type of electrically controlled pressure vacuum hot pressing furnace of this structure:

[0031] First, place the sample on the graphite disk 110 with the lower electric heating tube;

[0032] Then, the vacuum chamber 108 with a door is evacuated through an external vacuum system (the vacuum chamber 108 with a door is connected to the vacuum system through a pipeline);

[0033] Finally, the downward pressure cylinder 103 and the upward pressure cylinder 104 are started through the hydraulic system. At this time, the downward pressure cylinder 103 and the upward pressure cylinder 104 respectively drive the upper sliding pressure rod 111 and the lower sliding pressure rod 112 to move relative to each other, and link the upper electric heating tube graphite disk 109 and the lower electric heating tube graphite disk 110 to move synchronously until they contact and pressurize the sample. At this time, the upper electric heating tube graphite disk 109 and the lower electric heating tube graphite disk 110 are started through the electronic control system to complete the hot pressing sintering of the sample.

[0034] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A novel electrically controlled pressurized vacuum hot pressing furnace, comprising a skid-mounted base (100), a horizontal table (101), a vertical frame (102), a vacuum chamber with a door (108), an upper graphite plate with an electric heating tube (109), and a lower graphite plate with an electric heating tube (110), characterized in that: A downward pressure cylinder (103) and an upward pressure cylinder (104) are respectively vertically mounted on the horizontal table (101) and the vertical frame (102). A vacuum chamber mounting frame (105) is disposed on the horizontal table (101) and located inside the vertical frame (102). The upper inner wall of the n vacuum chamber mounting frame (105) is symmetrically provided with a vacuum chamber connecting portion (107). The downward pressure cylinder (103) and the upward pressure cylinder (104) are respectively provided with an upper sliding pressure rod (111) and a lower sliding pressure rod (112). An upper sliding pressure rod through groove (113) and a lower sliding pressure rod through groove (114) are provided in the end surface of the vacuum chamber (108) with a door perpendicular to the center line. The upper sliding pressure rod (111) and the lower sliding pressure rod (112) are respectively provided with an upper sealing portion (115) and a lower sealing portion (116) for use in conjunction with the upper sliding pressure rod through groove (113) and the lower sliding pressure rod through groove (114); Among them, the upper graphite disk (109) with electric heating tube and the lower graphite disk (110) with electric heating tube are respectively arranged on the opposite end surfaces of the upper sliding pressure rod (111) and the lower sliding pressure rod (112), and form a pressed structure, and the upper sealing part (115) and the lower sealing part (116) are respectively tightly fitted with the upper sliding pressure rod through groove (113) and the lower sliding pressure rod through groove (114).

2. The novel electrically controlled pressure vacuum hot pressing furnace according to claim 1 is characterized in that: The novel electrically controlled pressurized vacuum hot pressing furnace further comprises an upper circular driving plate (117) with a limiting hole and a lower circular driving plate (120) with a limiting hole, which are respectively arranged on the upper sliding pressure rod (111) and the lower sliding pressure rod (112), and at least one group of upper limiting columns (118) having one end connected to the upper end surface of the vacuum chamber connecting part (107) and the other end connected to the upper inner wall of the vacuum chamber mounting frame (105), and at least one group of lower limiting columns (121) having one end connected to the end surface of the horizontal table (101) and the other end connected to the upper end surface of the vacuum chamber connecting part (107); The upper limit post (118) and the lower limit post (121) respectively penetrate the upper circular drive plate (117) with a limit hole and the lower circular drive plate (120) with a limit hole, and are tightly fitted with the upper circular drive plate (117) with a limit hole and the lower circular drive plate (120). The upper pressure cylinder (104) and the upper sliding pressure rod (111) are respectively connected to the two sides of the upper circular drive plate (117) with a limit hole, and the lower pressure cylinder (103) and the lower sliding pressure rod (112) are respectively connected to the two sides of the lower circular drive plate (120) with a limit hole.

3. The novel electrically controlled pressure vacuum hot pressing furnace according to claim 2 is characterized in that: The novel electrically controlled pressure-type vacuum hot pressing furnace further comprises an upper conical reinforcement portion (119) arranged on the connection surface between the upper sliding pressure rod (111) and the upper circular driving plate with limiting holes (117), and a lower conical reinforcement portion (106) arranged on the connection surface between the lower sliding pressure rod (112) and the lower circular driving plate with limiting holes (120).

4. The novel electrically controlled pressure vacuum hot pressing furnace according to claim 1 is characterized in that: The vacuum chamber connection portion (107) is configured as a vertical rectangular structure, and the connection surface with the vacuum chamber with door (108) is configured as a plate structure or an arc structure.

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