Tool capable of continuously pressurizing circular tube thin-wall material in vacuum brazing process
By designing a detachable outer wedge block and inner wedge block tooling, combined with a servo press and guide device, the problem of uncontrollable pressure and difficulty in disassembly and assembly in vacuum brazing is solved, and pressure control and workpiece protection are achieved.
Patent Information
- Application Number
- CN202422329829.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-24
AI Technical Summary
During vacuum brazing, the prior art cannot effectively control and measure the applied pressure, resulting in uncontrollable pressure, deformation of the workpiece and difficulty in disassembly and assembly.
A tool set including a lower press head, an outer wedge block and an inner wedge block is designed. The outer wedge block and the inner wedge block can be freely separated. The pressure is accurately controlled through the servo press, avoiding the bolt pressing structure, ensuring constant pressure, and improving positioning accuracy through the guide column and the guide hole.
The pressure magnitude is controlled and constant, avoiding workpiece deformation, simplifying the disassembly and assembly process, improving production efficiency and workpiece protection.
Smart Images
Figure CN223185689U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of round tube processing, in particular to a tool for continuously pressurizing thin-walled round tube materials during vacuum brazing. Background Art
[0002] During the vacuum brazing process, two or more welding base materials need to be kept in a compressed state to ensure smooth welding. However, the temperature inside the welding furnace is often as high as over a thousand degrees. In some situations where the side wall of the round tube needs to be compressed, it is impossible to directly compress it with a pressing head.
[0003] Existing technologies mostly use bolts to tighten the inner and outer tooling plates to apply pre-pressure. Although this method can provide pressure at the beginning, as the brazing process proceeds, the pre-pressure will be released at high temperatures, resulting in a loss of pressurized brazing effect. Moreover, although a certain pre-pressure can be applied by tightening the inner and outer tooling pressure plates with bolts, the pressure is uncontrollable and cannot be measured, and is an empirical value. After brazing is completed, the bolt threads will be affected by the high temperature, making disassembly and assembly very difficult, and even damaging the workpiece. Utility Model Content
[0004] In order to solve the problems in the related art, the utility model provides a tool for continuously pressurizing thin-walled round tube materials during vacuum brazing, which solves the problems that the applied pressure is uncontrollable and immeasurable, the workpiece will deform, and the disassembly and assembly are difficult.
[0005] To solve the above problems, the following technical solutions are provided:
[0006] The utility model provides a tool for continuously pressurizing a thin-walled material of a circular tube during vacuum brazing, comprising a lower pressure head, a groove being provided in the middle of the lower pressure head, an annular protrusion being fixedly provided in the groove, a vertically arranged outer wedge block being provided between a position of the upper surface of the annular protrusion adjacent to the outer edge and the outer peripheral surface of the groove, an inner wedge block being provided in the outer wedge block, the bottom of the inner wedge block being abutted against the top of the annular protrusion, and a space for accommodating a circular thin-walled part being provided between the inner wedge block and the outer wedge block; the outer wedge block and the inner wedge block are both composed of a plurality of extrusion blocks, so that the outer wedge block and the inner wedge block can be freely disassembled; an upper pressure head is provided above the outer wedge block and the inner wedge block, and the lower surface of the upper pressure head is provided with a depression adapted to the upper portions of the outer wedge block and the inner wedge block.
[0007] In the above scheme, the outer wedge block and the inner wedge block are set, and the circular thin-walled part is placed between the outer wedge block and the inner wedge block. In conjunction with the servo press that can accurately control the vertical pressure, the pressure applied to the inner and outer sides of the circular thin-walled part can be accurately calculated, thereby solving the problem that the applied pressure is uncontrollable and immeasurable, keeping the externally applied pressure constant, and clamping the inner and outer wall surfaces of the circular thin-walled part by the outer wedge block and the inner wedge block, so that the workpiece will not be deformed and the use of a bolt clamping structure is avoided. The outer wedge block and the inner wedge block are designed to be petal-shaped, both composed of multiple extrusion blocks, and can be freely disassembled. After brazing, the tooling is easy to disassemble without damaging the round tube workpiece.
[0008] A first protrusion arranged vertically upward is provided in the middle of the annular protrusion, and a second protrusion arranged vertically downward is provided in the middle of the recess. The first protrusion and the second protrusion are both conical, and pits matching the first protrusion and the second protrusion are provided at both ends of the inner wedge block.
[0009] In the above solution, by setting the first protrusion and the second protrusion, when the upper pressure head presses down, the second protrusion is driven to move vertically downward, which is used to push the inner wedge block to move outward, thereby applying a certain force to the inner wall surface of the circular thin-walled part.
[0010] The middle part of the outer periphery of the outer wedge-shaped block is cylindrical, and the two ends of the outer periphery of the outer wedge-shaped block are contracted inwardly. When the upper pressure head presses downward, the contracted parts at the two ends are respectively located in the corresponding grooves and depressions.
[0011] In the above solution, the shape of the outer wall of the outer wedge-shaped block is set to avoid displacement of the outer wedge-shaped block when the upper pressure head presses downward.
[0012] A force-bearing block is provided in the middle of the upper surface of the upper pressure head, and the force-bearing block is fixedly connected to the upper pressure head through bolts.
[0013] In the above solution, the force-bearing blocks are provided to keep the applied pressure stable and improve production efficiency.
[0014] The lower pressure head is provided with a guide column along its circumference, and the upper pressure head is provided with a guide hole at a position corresponding to the guide column. The guide hole is adapted to the guide column, and the guide column and the guide hole are matched in an upward and downward sliding manner.
[0015] In the above solution, the provision of the guide column facilitates accurate positioning of the upper pressure head, thereby greatly improving working accuracy.
[0016] The outer wedge block and the inner wedge block can be freely plugged in and out, and the outer wedge block and the downward pressure head can be freely plugged in and out.
[0017] The above solution has the following advantages:
[0018] 1. The tooling for continuously pressurizing thin-walled materials of a circular tube during vacuum brazing of the present invention includes a lower pressure head, a groove is provided in the middle of the lower pressure head, an annular protrusion is fixedly provided in the groove, a vertically arranged outer wedge block is provided between the position of the upper surface of the annular protrusion near the outer edge and the outer peripheral surface of the groove, an inner wedge block is provided in the outer wedge block, the bottom of the inner wedge block is against the top of the annular protrusion, a space for accommodating a circular thin-walled part is provided between the inner wedge block and the outer wedge block, the outer wedge block and the inner wedge block are both composed of a plurality of extrusion blocks, so that the outer wedge block and the inner wedge block can be freely separated, an upper pressure head is provided above the outer wedge block and the inner wedge block, and the upper pressure head The lower surface is provided with a depression which is adapted to the upper part of the outer wedge block and the inner wedge block. The circular thin-walled part is placed between the outer wedge block and the inner wedge block. In conjunction with a servo press which can accurately control the size of the vertical pressure, the size of the pressure applied to the inner and outer sides of the circular thin-walled part can be accurately calculated, so that the size of the applied pressure can be controlled and the externally applied pressure is kept constant. The inner and outer wall surfaces of the circular thin-walled part are clamped by the outer wedge block and the inner wedge block, so that the workpiece will not be deformed and the use of a bolt clamping structure is avoided. The outer wedge block and the inner wedge block are designed to be petal-shaped and are composed of multiple extrusion blocks. They can be freely disassembled. After brazing, the tooling can be easily disassembled without damaging the round tube workpiece.
[0019] 2. A first protrusion arranged vertically upward is provided in the middle of the annular protrusion, and a second protrusion arranged vertically downward is provided in the middle of the recess. When the upper pressure head presses down, the second protrusion is driven to move vertically downward, which is used to push the inner wedge block to move outward, thereby exerting a certain force on the inner wall surface of the circular thin-walled part. The middle part of the outer periphery of the outer wedge block is cylindrical, and the two ends of the outer periphery of the outer wedge block are contracted inward, avoiding the displacement of the outer wedge block when the upper pressure head is pressed down. A force-bearing block is provided in the middle of the upper surface of the upper pressure head to keep the applied pressure stable and improve production efficiency. A guide column is provided along the circumference of the lower pressure head, and a guide hole is provided at the position corresponding to the upper pressure head and the guide column. The guide hole is adapted to the guide column to facilitate precise positioning of the upper pressure head. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic diagram of the structure of a tool for continuously pressurizing thin-walled round tube materials during vacuum brazing;
[0021] Figure 2 A cross-sectional view of a tool for continuously pressurizing thin-walled round tube materials during vacuum brazing;
[0022] Figure 3 This is a front view of a tool for continuously pressurizing thin-walled round tube materials during vacuum brazing;
[0023] Explanation of the accompanying symbols: 1. Lower pressure head; 2. Annular protrusion; 3. Outer wedge block; 4. Inner wedge block; 5. Circular thin-walled part; 6. Upper pressure head; 7. Depression; 8. First protrusion; 9. Second protrusion; 10. Pit; 11. Force-bearing block; 12. Guide column; 13. Guide hole. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0025] like Figures 1 to 3 As shown, the utility model is a tool for continuously pressurizing thin-walled materials of round tubes during vacuum brazing, comprising a lower pressure head 1, a groove is provided in the middle of the lower pressure head 1, an annular protrusion 2 is fixedly provided in the groove, a vertically arranged outer wedge block 3 is provided between the position of the upper surface of the annular protrusion 2 near the outer edge and the outer peripheral surface of the groove, an inner wedge block 4 is provided in the outer wedge block 3, the bottom of the inner wedge block 4 is against the top of the annular protrusion 2, and a space for accommodating a circular thin-walled part 5 is provided between the inner wedge block 4 and the outer wedge block 3; the outer wedge block 3 and the inner wedge block 4 can be freely plugged in and out, the outer wedge block 3 and the lower pressure head 1 can be freely plugged in and out, and the outer wedge block 3 and the inner wedge block 4 are both composed of a plurality of extrusion blocks, so that the outer wedge block 3 and the inner wedge block 4 can be freely disassembled, and the outer wedge block 3 An upper pressure head 6 is provided above the inner wedge block 4, and a depression 7 is provided on the lower surface of the upper pressure head 6 which is adapted to the upper parts of the outer wedge block 3 and the inner wedge block 4. The circular thin-walled part 5 is placed between the outer wedge block 3 and the inner wedge block 4, and cooperates with a servo press that can accurately control the size of the vertical pressure. The size of the pressure applied to the inner and outer sides of the circular thin-walled part 5 can be accurately calculated, so that the size of the applied pressure can be controlled and the externally applied pressure is kept constant. The inner and outer wall surfaces of the circular thin-walled part 5 are clamped by the outer wedge block 3 and the inner wedge block 4, so that the workpiece will not be deformed and the use of a bolt clamping structure is avoided. The outer wedge block 3 and the inner wedge block 4 are designed to be petal-shaped, each consisting of multiple extrusion blocks, which can be freely disassembled. After brazing, the tooling is easy to disassemble without damaging the round tube workpiece.
[0026] A first protrusion 8 arranged vertically upward is provided in the middle of the annular protrusion 2, and a second protrusion 9 arranged vertically downward is provided in the middle of the recess 7. The first protrusion 8 and the second protrusion 9 are both conical, and both ends of the inner wedge block 4 are provided with pits 10 adapted to the first protrusion 8 and the second protrusion 9. When the upper pressure head 6 is pressed down, the second protrusion 9 is driven to move vertically downward, which is used to push the inner wedge block 4 to move outward, thereby exerting a certain force on the inner wall surface of the circular thin-walled part 5.
[0027] The middle part of the outer periphery of the outer wedge-shaped block 3 is cylindrical, and the two ends of the outer periphery of the outer wedge-shaped block 3 are contracted inward. When the upper pressure head 6 is pressed down, the contracted parts at the two ends are respectively located in the corresponding grooves and depressions 7, thereby preventing the outer wedge-shaped block 3 from shifting when the upper pressure head 6 is pressed down.
[0028] A force-bearing block 11 is provided in the middle of the upper surface of the upper pressure head 6 , and the force-bearing block 11 is fixedly connected to the upper pressure head 6 by bolts to keep the applied pressure stable and improve production efficiency.
[0029] A guide column 12 is provided on the lower pressure head 1 along its circumference, and a guide hole 13 is provided at the position corresponding to the guide column 12 of the upper pressure head 6. The guide hole 13 is adapted to the guide column 12, and the guide column 12 and the guide hole 13 are matched in an up and down sliding state, which facilitates the precise positioning of the upper pressure head 6.
[0030] During operation, first place the circular thin-walled part 5 between the outer wedge block 3 and the inner wedge block 4, and clamp the inner and outer wall surfaces of the circular thin-walled part 5 through the outer wedge block 3 and the inner wedge block 4. In combination with the servo press that can accurately control the size of the vertical pressure, the size of the pressure applied to the inner and outer sides of the circular thin-walled part 5 can be accurately calculated to keep the applied pressure constant. First, drive the upper pressure head 6 downward so that the guide hole 13 corresponds to the guide column 12, driving the second protrusion 9 to move vertically downward. The second protrusion 9 moves into the pit 10, which can push the inner wedge block 4 to move outward, thereby applying a certain force to the inner wall surface of the circular thin-walled part 5, which is convenient for the forming of the circular tube workpiece. By designing the outer wedge block 3 and the inner wedge block 4 into a petal shape, and the outer wedge block 3 and the inner wedge block 4 are both composed of four freely detachable extrusion blocks, it is convenient to disassemble after brazing without damaging the circular tube workpiece.
[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.
[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A tool for continuously pressurizing thin-walled round tube materials during vacuum brazing, characterized in that: The invention comprises a pressing head (1), wherein a groove is provided in the middle of the pressing head (1), an annular protrusion (2) is fixedly provided in the groove, an outer wedge block (3) is provided vertically between the position of the upper surface of the annular protrusion (2) near the outer edge and the outer peripheral surface of the groove, an inner wedge block (4) is provided in the outer wedge block (3), the bottom of the inner wedge block (4) is against the top of the annular protrusion (2), and the inner wedge block (4) and the outer wedge block are in contact with each other. (3) is provided with a space for accommodating a circular thin-walled part (5); the outer wedge-shaped block (3) and the inner wedge-shaped block (4) are both composed of a plurality of extrusion blocks, so that the outer wedge-shaped block (3) and the inner wedge-shaped block (4) can be freely disassembled; an upper pressure head (6) is provided above the outer wedge-shaped block (3) and the inner wedge-shaped block (4), and a recess (7) is provided on the lower surface of the upper pressure head (6) to match the upper part of the outer wedge-shaped block (3) and the inner wedge-shaped block (4).
2. A tool for continuously pressurizing thin-walled round tube materials during vacuum brazing according to claim 1, characterized in that: A first protrusion (8) arranged vertically upward is provided in the middle of the annular protrusion (2), and a second protrusion (9) arranged vertically downward is provided in the middle of the recess (7). The first protrusion (8) and the second protrusion (9) are both conical in shape, and pits (10) adapted to the first protrusion (8) and the second protrusion (9) are provided at both ends of the inner wedge-shaped block (4).
3. The tooling for continuously pressurizing thin-walled round tube materials during vacuum brazing according to claim 1, characterized in that: The middle portion of the outer periphery of the outer wedge-shaped block (3) is cylindrical, and both ends of the outer periphery of the outer wedge-shaped block (3) are contracted inwardly. When the upper pressure head (6) is pressed downward, the contracted portions at both ends are located in the corresponding grooves and depressions (7), respectively.
4. A tool for continuously pressurizing thin-walled round tube materials during vacuum brazing according to claim 1, characterized in that: A force-bearing block (11) is provided in the middle of the upper surface of the upper pressure head (6), and the force-bearing block (11) is fixedly connected to the upper pressure head (6) via bolts.
5. The tooling for continuously pressurizing thin-walled round tube materials during vacuum brazing according to claim 1, characterized in that: A guide column (12) is provided on the lower pressure head (1) along its circumference, and a guide hole (13) is provided at a position corresponding to the guide column (12) on the upper pressure head (6), and the guide hole (13) is adapted to the guide column (12), and the guide column (12) and the guide hole (13) are matched in an upward and downward sliding manner.
6. A tool for continuously pressurizing thin-walled round tube materials during vacuum brazing according to claim 1, characterized in that: The outer wedge block (3) and the inner wedge block (4) can be freely plugged in and out, and the outer wedge block (3) and the lower pressure head (1) can be freely plugged in and out.