CN-224209062-U - Mixed loading clamp for cold and hot blanks of heating furnace

CN224209062UCN 224209062 UCN224209062 UCN 224209062UCN-224209062-U

Abstract

The utility model discloses a heating furnace cold and hot blank mixed fixture, which relates to the technical field of blank forging and comprises a clamping arm body made of elastic metal materials and a detachable heat-resistant insert arranged at the contact end of a workpiece. The heat-resistant insert with the thermal expansion coefficient smaller than that of the clamping arm body is adopted, the thermal expansion difference of materials is utilized under the working condition of high Wen Gachi to enable the connecting interface of the insert and the arm body to generate self-generated compressive stress, thermal deformation is effectively compensated, the insert is prevented from loosening, creep deformation and oxidation are resisted when the heat-resistant insert is directly contacted with a high-temperature blank, structural rigidity is maintained, the elastic arm body exerts the advantage of high toughness when clamped at low temperature, and flexible clamping force is provided to avoid brittle fracture. The partition material design synchronously solves the contradiction between softening failure of a high temperature area and insufficient elasticity of a low temperature area of the traditional clamp under the cold-hot alternating working condition, prolongs the service life and ensures the clamping stability.

Inventors

CUI YINGHAO
DI JIANQIANG
CHAI XIAOHUI
LIU WENBO
SONG LIBO
XUE WEIHUA

Assignees

山西高义钢铁有限公司

Dates

Publication Date: 20260508
Application Date: 20250708

Claims (8)

1. A heating furnace cold and hot blank mixed loading clamp comprises a clamping arm (1); The novel heat-resistant clamping arm is characterized in that the body of the clamping arm (1) is made of elastic metal materials, a detachable heat-resistant insert (2) is arranged at the workpiece contact end of the clamping arm (1), and the thermal expansion coefficient of the heat-resistant insert (2) is smaller than that of the body material of the clamping arm (1).
2. The hot and cold blank mixing fixture for the heating furnace, which is disclosed in claim 1, is characterized in that the heat-resistant insert (2) is connected with the clamping arm (1) through a mechanical embedding structure, the mechanical embedding structure comprises a protrusion (3) arranged on the side surface of the heat-resistant insert (2) and a groove (4) arranged at the end part of the clamping arm (1), and the protrusion (3) is in interference fit with the groove (4).
3. The heating furnace cold and hot blank mixed loading clamp is characterized in that an anti-falling locking hole (5) is formed in the side wall of the heat-resistant insert (2), a limiting hole (6) is formed in the corresponding position of the clamping arm (1), and locking bolts (7) penetrating through the anti-falling locking hole (5) and the limiting hole (6) are arranged in the anti-falling locking hole.
4. The heating furnace cold and hot blank mixing fixture is characterized in that the elastic metal material is spring steel, and the heat-resistant insert (2) is made of nickel-based alloy materials.
5. The heating furnace cold and hot blank mixed fixture is characterized in that a cooling cavity (8) is formed in the heat-resistant insert (2), an opening of the cooling cavity (8) extends to the side face of the heat-resistant insert (2) and is sealed through a detachable sealing cover (9), and phase-change energy storage materials are filled in the cooling cavity (8).
6. The heating furnace cold and hot blank mixing fixture is characterized in that heat conducting ribs (10) are distributed on the cavity wall of the cooling cavity (8), and the heat conducting ribs (10) are vertically connected with the workpiece contact surface of the heat-resistant insert (2).
7. The heating furnace cold and hot blank mixed loading clamp is characterized in that a first stepped groove (11) is formed in the outer side of the limiting hole (6), a second stepped groove (12) is formed in the outer side of the anti-falling locking hole (5), and a nut of the locking bolt (7) is matched with the second stepped groove (12).
8. The heating furnace cold and hot blank mixed loading clamp is characterized in that an annular sleeve (13) is arranged in the first stepped groove (11), an inner thread matched with the outer thread of the locking bolt (7) is arranged in the annular sleeve (13), and the outer side of one end of the annular sleeve (13) is in interference fit with the first stepped groove (11) while the other end of the annular sleeve is in a hexagonal structure.

Description

Mixed loading clamp for cold and hot blanks of heating furnace Technical Field The utility model relates to the technical field of blank forging, in particular to a cold and hot blank mixed fixture of a heating furnace. Background In the production practice of the metallurgical and forging industry, a heating furnace is required to frequently and alternately clamp a high-temperature billet just taken out of the furnace and a cold billet in a room temperature state. This mode of operation of alternating hot and cold blanks places extremely stringent demands on the clamp. Conventional jigs currently in common use are generally manufactured integrally from a single metal material. However, when the single material structure is used for coping with cold and hot mixed loading working conditions, the contradictory performance requirements of rigidity and heat resistance and elastic clamping in a high temperature area and a non-high temperature area can not be met, in the high temperature area, materials are easy to creep, soften and oxidize and aggravate, so that the structural strength is reduced, in the low temperature area where the elasticity is required, the single heat-resistant materials are often too hard, insufficient in toughness and easy to generate brittleness or fatigue fracture, and the service life of the whole clamp is further reduced. Disclosure of Invention The utility model aims to provide a heating furnace cold and hot blank mixed fixture so as to solve the problems in the background technology. The technical scheme is that the heating furnace cold and hot blank mixed fixture comprises a clamping arm, wherein a body of the clamping arm is made of elastic metal materials, and a detachable heat-resistant insert is arranged at a workpiece contact end of the clamping arm, and the heat expansion coefficient of the heat-resistant insert is smaller than that of the body of the clamping arm. Preferably, the heat-resistant insert is connected with the clamping arm through a mechanical jogged structure, and the mechanical jogged structure comprises a protrusion arranged on the side surface of the heat-resistant insert and a groove arranged at the end part of the clamping arm, wherein the protrusion is in interference fit with the groove. Preferably, the side wall of the heat-resistant insert is provided with an anti-falling locking hole, the corresponding position of the clamping arm is provided with a limiting hole, and locking bolts penetrating through the anti-falling locking hole and the limiting hole are arranged in the anti-falling locking hole and the limiting hole. Preferably, the elastic metal material is spring steel, and the heat-resistant insert is made of nickel-based alloy material. Preferably, a cooling cavity is arranged in the heat-resistant insert, an opening of the cooling cavity extends to the side face of the heat-resistant insert and is sealed through a detachable sealing cover, and the cooling cavity is filled with phase change energy storage materials. Preferably, the cavity wall of the cooling cavity is distributed with heat conducting convex ribs which are vertically connected with the workpiece contact surface of the heat-resistant insert. Preferably, a first step groove is formed in the outer side of the limiting hole, a second step groove is formed in the outer side of the anti-falling locking hole, and a nut of the locking bolt is matched with the second step groove. Preferably, an annular sleeve is arranged in the first stepped groove, an internal thread matched with the external thread of the locking bolt is arranged in the annular sleeve, the outer side of one end of the annular sleeve is in interference fit with the first stepped groove, and the other end of the annular sleeve is of a hexagonal structure. Compared with the prior art, the utility model has the beneficial effects that: The device creatively adopts elastic metal materials to form the clamping arm body, and a detachable heat-resistant insert with smaller thermal expansion coefficient is arranged at the end part of the clamping arm body, which is in direct contact with the high-temperature blank. The zoned material design effectively solves the contradictory requirement that the traditional single heat-resistant steel clamp cannot consider both the rigid heat resistance in the high temperature zone and the elastic clamping in the low temperature zone. The elastic arm body can provide good toughness and elastic clamping force in a low temperature area, avoids the risk of brittleness or fatigue fracture, and prolongs the whole service life of the clamp; The heat-resistant insert is detachably mounted at the end of the clamping arm through a mechanical jogging structure and a locking bolt structure, so that a key component which is most easily worn, damaged or deteriorated in performance under a high-temperature environment, namely the heat-resistant insert, can be independently replaced. Compared with the situ