Split type die sleeve for large extruding machine

Abstract

A split type die sleeve for a large extruding machine belongs to the technical field of machining and is characterized in that an upper die sleeve and a lower die sleeve are semi-circular bodies, a convex step and a concave step are respectively arranged on joint surfaces of the upper die sleeve and the lower die sleeve, so that the upper die sleeve and the lower die sleeve are accurately positioned and matched, a hoisting dovetail groove is formed in the top of the upper die sleeve, a nitrogen cooling hole is formed in the upper die sleeve, and the nitrogen cooling hole is formed in the lower die sleeve. A semicircular die holder spigot is installed on the side plane of the upper die sleeve, the outer edge of the die holder spigot is a front end face inclined face, a key groove is formed in the bottom of the lower die sleeve, a die holder spigot and a die spigot are installed on the side face of the lower die sleeve, a limiting groove is formed in the inner ring face of the lower die sleeve in the forward direction, and a plurality of blind holes are formed in the side plane of the lower die sleeve. The lower part of the die sleeve is provided with an inner diameter inclined plane and a spigot inclined plane. The die has the beneficial effects that when one part is damaged, only the damaged part can be replaced, and due to the split type die, when the die is mounted into the lower die sleeve, the operation is more convenient. The die heating die sleeve is not heated, and only one die sleeve is needed, so that the cost overstock is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of nonferrous metal processing and manufacturing, and relates to an improvement of a split die sleeve used for a large extruder. Background Art

[0002] In rail vehicle manufacturing, the size of aluminum extrusions directly impacts the vehicle's overall performance and safety. Traditional welding processes for multi-piece extrusions result in numerous welds and low strength. To address these issues, manufacturers tend to design larger single extrusions to reduce welds and increase strength. However, this results in larger molds and die sets, increasing manufacturing costs, operational complexity, and capital investment. Existing die sets often need to be heated along with the mold, requiring multiple sets to ensure production continuity, further increasing costs. Summary of the Invention

[0003] The purpose of the utility model is to provide a split die sleeve for a large extruder, in which only the damaged part of the split die sleeve is replaced. Since the mold is heated but the die sleeve is not heated, only one set of die sleeve is required, which greatly reduces the cost.

[0004] The technical solution of the utility model is:

[0005] The split mold set is composed of two upper and lower mold sets;

[0006] The upper and lower die sleeves are semicircular bodies, and convex steps and concave steps are respectively provided on the connecting surfaces of the upper and lower die sleeves to ensure precise positioning and matching of the upper and lower die sleeves. Upper and lower fastening threaded holes are respectively opened on the connecting surfaces of the upper and lower die sleeves, a lifting dovetail groove is opened on the top of the upper die sleeve, a nitrogen cooling hole is opened on the upper die sleeve, a semicircular die base stop is installed on the side plane of the upper die sleeve, the outer edge of the die base stop is a front end face inclined surface, a keyway is opened on the bottom of the lower die sleeve, a die base stop and a mold stop are installed on the side of the lower die sleeve, a limiting groove is opened in the forward direction on the inner ring surface of the lower die sleeve, and several blind holes are opened on the side plane of the lower die sleeve. The lower part of the die sleeve is provided with an inner diameter inclined surface and a stop inclined surface, so that the mold can be smoothly placed in the lower part of the die sleeve.

[0007] The beneficial effects of the utility model are:

[0008] The mold sleeve is split into two parts. If one part is damaged, only the damaged part can be replaced. Furthermore, the split mold allows for easier assembly of the mold into the lower mold sleeve, making operation more convenient. During use, the mold sleeve does not require bolting, and the mold is heated without heating the sleeve. Only one mold sleeve is required, significantly reducing backlog costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is an axial side view of the utility model;

[0010] Figure 2This is the rear axle side view of the upper part of the die sleeve;

[0011] Figure 3 This is a side view of the front axle of the upper part of the mold sleeve;

[0012] Figure 4 This is the rear axle side view of the lower part of the mold sleeve;

[0013] Figure 5 This is a side view of the front axle of the lower part of the mold sleeve. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] As shown in the figure, 1 is the upper die sleeve, 2 is the lower die sleeve, 11 is the lifting dovetail groove, 12 is the nitrogen cooling hole, 13 is the die base stop, 14 is the die stop, 15 is the front end face bevel, 16 are the left and right steps, 17 are the front and rear steps, 18 are the upper and lower fastening threaded holes, 21 is the keyway, 22 is the die base stop, 23 is the die stop, 24 is the die stop bevel, 25 is the limit groove, 26 is the front end face bevel, 27 are the left and right steps, 28 are the front and rear steps, 29 is the blind hole, 210 is the lifting threaded hole, 211 is the inner diameter bevel, and 212 is the fastening threaded hole.

[0016] The upper die sleeve 1 is provided with a lifting dovetail groove 11 to facilitate the lifting of the upper die sleeve 1; a nitrogen cooling hole 12 is provided, and for profiles with strict requirements on the inner and outer wall surfaces, liquid nitrogen can be added to reduce the temperature of the die working zone, thereby improving the surface quality of the profile; a die base stop 13 is provided to limit the forward and backward movement of the die sleeve; a die stop 14 is provided to limit the forward and backward movement of the mold; a front end face bevel 15 is provided on the front end face to prevent scissors from cutting the die sleeve during extrusion, shearing and pressure; left and right platforms 16 and front and rear steps 17 are provided at the contact position with the lower part of the die sleeve to ensure that the upper part of the die sleeve can be accurately matched with the lower part of the die sleeve; upper and lower fastening threaded holes 18 are provided to facilitate fastening with the lower part 2 of the die sleeve after the die sleeve is removed from the machine, so as to facilitate storage.

[0017] The lower die sleeve 2 is provided with a keyway 21 to facilitate the placement of the die sleeve in the center of the die base; a die base stop 22 is provided to limit the forward and backward movement of the die sleeve and ensure the smooth execution of the die demolding process; a die stop 23 is provided to limit the forward and backward movement of the die, and the die stop 23 is provided with a die stop bevel 24 to facilitate the smooth insertion of the die stop; a limit groove 25 is provided to limit the rotation of the die in the die sleeve; a front end bevel 26 is provided on the front end face to prevent the die sleeve from being cut by scissors during extrusion, shearing and pressure; left and right steps 27 and front and back steps 28 are provided at the connection position with the lower die sleeve 2 to ensure that the upper die sleeve 1 and the lower die sleeve 2 are accurately matched. Two blind holes 29 are provided on the front and back sides respectively, which are convenient for inserting standard plug-in cylindrical lifting ears to lift the lower mold sleeve 2; a lifting threaded hole 210 is added to the contact surface with the upper mold sleeve 1, which can be screwed into the lifting ring for lifting; an inner diameter inclined surface 211 is provided on the inner diameter to facilitate the smooth insertion of the mold; a fastening threaded hole 212 is provided to facilitate fastening it to the upper mold sleeve 1 after the mold sleeve is removed from the machine, so as to facilitate storage.

Claims

1. A split die sleeve for a large extruder, characterized by: The split die sleeve is composed of two die sleeves, the upper and lower die sleeves; the upper and lower die sleeves are semicircular bodies, and convex steps and concave steps are respectively provided on the connecting surfaces of the upper and lower die sleeves, so that the upper and lower die sleeves can be accurately positioned and matched. Upper and lower fastening threaded holes are respectively opened on the connecting surfaces of the upper and lower die sleeves, a lifting dovetail groove is opened on the top of the upper die sleeve, a nitrogen cooling hole is opened on the upper die sleeve, a semicircular die base stop is installed on the side plane of the upper die sleeve, the outer edge of the die base stop is a front end face inclined surface, a keyway is opened on the bottom of the lower die sleeve, a die base stop and a mold stop are installed on the side of the lower die sleeve, a limiting groove is opened in the forward direction on the inner ring surface of the lower die sleeve, and several blind holes are opened on the side plane of the lower die sleeve. The lower part of the die sleeve is provided with an inner diameter inclined surface and a stop inclined surface, so that the mold can be smoothly placed in the lower part of the die sleeve.

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