Adjustable mandrel of spinning machine

Abstract

The utility model discloses an adjustable core mold of a spinning machine. The adjustable core mold comprises a front mold, a rear mold, an expansion ring and an outer fixing ring which are coaxially arranged, the front mold and the rear mold are both of a cylindrical structure, the front mold is arranged at the front end of the rear mold, the inner supporting cover is coaxially and fixedly installed at the front end of the front mold, the expansion ring is fixedly installed at the inner rear end of the rear mold, and the rear mold and the expansion ring are fixedly installed and connected through the outer fixing ring. The front mold is fixedly connected with the rear mold through a pull rod connecting mechanism, the pull rod connecting mechanism arranged in the front mold and the rear mold comprises a pull rod, a front mold annular support and a rear mold annular support, and the front mold annular support and the rear mold annular support are coaxially and fixedly connected with the front mold and the rear mold respectively. A rod body of the pull rod penetrates through the front mold annular support and the rear mold annular support, and the front end and the rear end of the pull rod are fixedly connected with the inner supporting cover and the expansion ring respectively. According to the core mold, the core mold can be lengthened on the premise that a hole does not need to be formed in the core mold, so that the core mold is prevented from being manufactured again, and the machining and manufacturing cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to a spinning machine core mold, specifically an adjustable spinning machine core mold suitable for forming cathode rollers for electrolytic copper foil, belonging to the field of spinning machine technology. Background Technology

[0002] A spinning press is a mechanical device used for the plastic forming of metals. It works by rotating the material, expanding the force from a point to a line, and then from a line to a surface, while simultaneously applying pressure in a specific direction. This causes the metal material to deform and flow along that direction, forming a specific shape. During operation, the spinning frame applies external force, and the workpiece is processed by rotating molds or rollers, achieving continuous point-to-point plastic deformation of the material. As a highly efficient metal plastic forming device, the spinning press operates on the principle of the combined action of rotation and pressure. By precisely controlling these parameters, accurate forming of metal materials can be achieved. With continuous technological advancements, the application fields of spinning presses will become more extensive, and their importance in industrial production will become increasingly prominent. For example, spinning presses are frequently used in the processing of cathode rollers for electrolytic copper foil to achieve cathode roller forming. For ultra-large diameter cathode rollers, a vertical four-wheel spinning press is used, with multiple passes and a large thinning rate to achieve sufficient refinement and fragmentation of the titanium cylinder's main grains. This method has advantages such as convenient mandrel replacement and simple assembly and disassembly of cylindrical parts.

[0003] However, due to the continuous updates and iterations in battery technology, copper foil manufacturers are demanding increasingly diverse processing options for copper foil, leading to a greater variety of equipment requirements. This necessitates spinning machines capable of handling cathode rollers of varying sizes. Different cathode roller sizes require matching mandrels of different sizes, but most existing spinning machine mandrels use fixed dimensions. Particularly for spinning machines used in cathode roller processing, the high structural strength required for the mandrels necessitates the use of high-density steel, making it impossible to create openings in the mandrel to secure an extension mechanism, thus rendering the mandrel length unadjustable. Currently, there is a lack of adjustable spinning machine mandrels specifically designed for processing large-sized cylindrical bodies. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides an adjustable mandrel for a spinning machine, which can lengthen the mandrel without drilling holes in it, thereby avoiding the need to remake the mandrel and greatly reducing the processing and manufacturing costs.

[0005] To achieve the above objectives, the adjustable mandrel of this spinning machine includes a front mold, a rear mold, an expansion ring, and an outer retaining ring arranged coaxially.

[0006] Both the front mold and the rear mold are cylindrical structures, and the inner and outer diameters of the front mold and the rear mold are the same. The front mold is located at the front end of the rear mold. An inner support cover is coaxially fixedly installed at the front end of the front mold. The expansion ring is fixedly installed at the inner rear end of the rear mold through an embedded structure. The rear mold and the expansion ring are fixedly connected by an outer fixing ring sleeved on the outer rear end of the rear mold.

[0007] The front mold is fixedly connected to the rear mold via a tie rod connecting mechanism. The tie rod connecting mechanism, which is set inside the front and rear molds, includes a tie rod, a front mold annular support, and a rear mold annular support. The front mold annular support and the rear mold annular support are respectively fixedly connected to the front mold and the rear mold coaxially. Multiple tie rods are evenly distributed along the circumferential direction of the front and rear molds. The rod body passes through the front mold annular support and the rear mold annular support, and the front and rear ends of the tie rod are respectively fixedly installed and connected to the inner support cover and the expansion ring.

[0008] As a further improvement of this utility model, the rear end of the front mold and the front end of the rear mold are provided with a staggered nesting structure.

[0009] As a further improvement of this utility model, the tie rod through hole on the front mold annular support and the tie rod through hole on the rear mold annular support are both waist-shaped hole structures, and the tie rod is threadedly connected to a positioning block, and the positioning block is pressed against the front mold annular support and / or the rear mold annular support.

[0010] As a further improvement of this utility model, a pad is provided between the front mold annular support and the rear mold annular support.

[0011] As a further improvement of this utility model, the expansion ring is fixedly installed on the inner rear end of the rear mold through an embedded structure.

[0012] Compared to existing technologies, this spinning machine's adjustable mandrel allows for easy lengthening of small cathode rollers when no extension is required. First, the tie rod and then the front mold can be removed. The inner support cover is then installed at the front end of the rear mold, allowing for spinning on the spinning machine. When extension is needed, the front mold is first fixedly connected to the rear mold via a tie rod connector, and then the inner support cover is installed at the front end of the front mold. This allows for spinning on large cathode rollers. The adjustable mandrel of this spinning machine allows for mandrel lengthening without the need for drilling holes in the mandrel, thus avoiding the need to remake the mandrel and significantly reducing manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the figure: 1. Front mold, 11. Inner support cover, 2. Rear mold, 3. Expansion ring, 4. Outer fixing ring, 5. Tie rod connecting mechanism, 51. Tie rod, 52. Front mold annular support, 53. Rear mold annular support, 54. Positioning block, 55. Pad block. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1 As shown, the adjustable mandrel of this spinning machine includes a front mold 1, a rear mold 2, an expansion ring 3, and an outer fixing ring 4 arranged coaxially.

[0017] Both the front mold 1 and the rear mold 2 are cylindrical structures, and the inner and outer diameters of the front mold 1 and the rear mold 2 are the same. The front mold 1 is located at the front end of the rear mold 2. An inner support cover 11 is coaxially fixedly installed at the front end of the front mold 1. The expansion ring 3 is fixedly installed at the inner rear end of the rear mold 2. To achieve a stable coaxial installation, the expansion ring 3 can be fixedly installed at the inner rear end of the rear mold 2 through an embedded structure. The rear mold 2 and the expansion ring 3 are fixedly connected by an outer fixing ring 4 sleeved on the outer rear end of the rear mold 2. The outer fixing ring 4 can be fixed by inserting screws to press the rear mold 2 to fix the rear mold 2 and the expansion ring 3.

[0018] The front mold 1 is fixedly connected to the rear mold 2 via a tie rod connecting mechanism 5. The tie rod connecting mechanism 5, which is installed inside the front mold 1 and the rear mold 2, includes a tie rod 51, a front mold annular support 52, and a rear mold annular support 53. The front mold annular support 52 and the rear mold annular support 53 are coaxially fixedly connected to the front mold 1 and the rear mold 2, respectively. Multiple tie rods 51 are evenly distributed along the circumferential direction of the front mold 1 and the rear mold 2. The rod body of the tie rod 51 passes through the front mold annular support 52 and the rear mold annular support 53, and the front and rear ends of the tie rod 51 are fixedly installed and connected to the inner support cover 11 and the expansion ring 3, respectively. The connection between the front and rear ends of the tie rod 51 and the inner support cover 11 and the expansion ring 3 can be a bidirectional locking threaded connection or a unidirectional locking connection. For the locking threaded connection method: When the double-locking threaded connection method is adopted, the inner support cover 11 and the expansion ring 3 are respectively provided with internal threaded holes with opposite directions of rotation, and the front and rear ends of the pull rod 51 are respectively provided with external threads with opposite directions of rotation. The pull rod 51 can be installed by controlling the rotation of the pull rod 51, and the inner support cover 11 and the expansion ring 3 can be locked synchronously by the pull rod 51. When the single-locking threaded connection method is adopted, the inner support cover 11 and the expansion ring 3 are respectively provided with pull rod through-holes. The front end (or rear end) of the pull rod 51 is provided with external threads, and the rear end (or front end) is provided with a positioning boss. After the pull rod 51 is inserted into the pull rod through-holes on the inner support cover 11 and the expansion ring 3 and positioned by the positioning boss, the pull rod 51 can be installed by the locking nut installed on the external thread of the pull rod 51, and the inner support cover 11 and the expansion ring 3 can be locked synchronously by the pull rod 51.

[0019] When the adjustable mandrel of this spinning machine does not require lengthening, the tie rod 51 can be removed first, then the front mold 1 can be removed, and then the inner support cover 11 can be installed on the front end of the rear mold 2. This allows it to be mounted on the spinning machine for spinning small-sized cathode rollers. When lengthening is required, the front mold 1 can be fixedly connected to the rear mold 2 via the tie rod connector 5, and then the inner support cover 11 can be installed on the front end of the front mold 1. This allows it to be mounted on the spinning machine for spinning large-sized cathode rollers. The mandrel can be lengthened without drilling holes in it, thus avoiding the need to remake the mandrel and significantly reducing manufacturing costs.

[0020] To achieve a stable connection between the front mold 1 and the rear mold 2, and to ensure their coaxiality, as a further improvement of this utility model, the rear end of the front mold 1 and the front end of the rear mold 2 are provided with a misaligned nesting structure. The misaligned nesting structure may include a small-diameter section provided on the rear end of the front mold 1 (or the front end of the rear mold 2) and a large-diameter section provided on the front end of the rear mold 2 (or the rear end of the front mold 1). The front mold 1 can be coaxially installed on the front end of the rear mold 2 through the shaft hole fit of the misaligned nesting structure. To ensure a stable coaxial installation connection, the small-diameter section and the large-diameter section can be installed using an interference fit.

[0021] To prevent the tie rod 51 from twisting and losing its support due to excessive torsional force during the spinning process, as a further improvement of this utility model, the tie rod 51 through hole on the front mold annular support 52 and the tie rod 51 through hole on the rear mold annular support 53 are both oblong holes. A positioning block 54 is threadedly connected to the tie rod 51, and the positioning block 54 is pressed against the front mold annular support 52 and / or the rear mold annular support 53. After the tie rod 51 passes through the front mold annular support 52 and the rear mold annular support 53, the positioning block 54 is pressed against the front mold annular support 52 and / or the rear mold annular support 53 through a threaded connection. The positioning block 54 can provide stable support to the tie rod 51, thereby preventing damage to the tie rod 51 during the spinning process. After the positioning block 54 is installed, in order to prevent the front mold annular support 52 and / or the rear mold annular support 53 from deforming due to tension, a pad 55 can be positioned between the front mold annular support 52 and the rear mold annular support 53. The pad 55 supported between the front mold annular support 52 and the rear mold annular support 53 can prevent the front mold annular support 52 and / or the rear mold annular support 53 from deforming due to tension.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adjustable core die for a spinning machine, characterized by, The front die (1), the rear die (2), the expansion ring (3) and the outer fixed ring (4) are coaxially arranged. The front die (1) and the rear die (2) are both in a cylindrical structure, and the inner and outer diameters of the front die (1) and the rear die (2) are the same, the front die (1) is arranged at the front end of the rear die (2), the front end of the front die (1) is coaxially fixedly installed with an inner supporting cover (11), the rear end of the rear die (2) is fixedly installed with the expansion ring (3), and the rear die (2) and the expansion ring (3) are fixedly and connectively installed through the outer fixed ring (4) arranged at the outer rear end of the rear die (2). The front die (1) is fixedly connected with the rear die (2) through a pull rod connecting mechanism (5), the pull rod connecting mechanism (5) arranged in the front die (1) and the rear die (2) comprises a pull rod (51), a front die annular support (52) and a rear die annular support (53), the front die annular support (52) and the rear die annular support (53) are coaxially fixedly connected with the front die (1) and the rear die (2) respectively, the pull rod (51) is arranged in multiple pieces along the circumferential direction of the front die (1) and the rear die (2), and the rod body of the pull rod (51) penetrates through the front die annular support (52) and the rear die annular support (53), and the front end and the rear end of the pull rod (51) are fixedly and connectively installed with the inner supporting cover (11) and the expansion ring (3) respectively.

2. The adjustable plug of a spinning machine according to claim 1, characterized in that, The rear end of the front die (1) and the front end of the rear die (2) are provided with a mismatched nesting structure.

3. The adjustable plug for a spinning machine of claim 1, wherein, The pull rod (51) penetrating holes on the front die annular support (52) and the rear die annular support (53) are both in a waist-shaped hole structure, the pull rod (51) is threadedly and connectively connected with a positioning block (54), and the positioning block (54) is press-connected on the front die annular support (52) and / or the rear die annular support (53).

4. The adjustable plug of a spinning machine according to claim 3, characterized in that, The front die annular support (52) and the rear die annular support (53) are provided with a gasket (55).

5. The adjustable plug of a spinning machine of claim 1, wherein, The expansion ring (3) is fixedly installed at the rear end of the rear die (2) through an embedded structure.

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