Door-shaped closed integral rack of reciprocating cold pilger mill

Abstract

The utility model discloses a door-shaped closed integral rack of a reciprocating cold pilger mill, and belongs to the technical field of cold pilger mill manufacturing. Comprising a door-shaped closed integral machine frame, adjusting bolt through holes are formed in the side faces of left and right memorial archways of the machine frame, connecting rod connecting holes and weight reducing grooves are formed in the front faces of the left and right memorial archways, and the machine frame is integrally cast and formed. The left and right memorial archways of the door-shaped closed integral rack have higher symmetry and can be formed through one-time finish machining, and compared with respective machining of the left and right memorial archways of a traditional separated rack, the door-shaped closed integral rack has higher machining precision consistency. The door-shaped closed integral rack is subjected to integral heat treatment, and compared with a traditional separated rack which needs to respectively carry out heat treatment on a left memorial archway and a right memorial archway, the door-shaped closed integral rack has the advantages that the mechanical property consistency is higher, and the situation that a single memorial archway is seriously abraded in the pipe rolling production process due to the fact that the mechanical property difference is too large due to batch heat treatment is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cold rolling mill manufacturing, and more specifically, to a door-shaped closed integral frame of a reciprocating cold rolling mill. Background Art

[0002] Two-roll cold rolling mill is widely used in the field of high-precision pipe preparation. During each reciprocating rolling cycle, it can reduce the cross-section of the tube blank by up to 75~85%. The use of two-roll cold rolling mill can greatly reduce the deformation process, shorten and improve the production process, significantly reduce material loss, reduce production costs, and improve product performance and quality.

[0003] The rolling mill frame is an important basic component to ensure the normal operation of the rollers, roller bearings and bearing seats. It is crucial to the dimensional accuracy of the finished pipe after rolling and directly affects the service life of the rolling mill. Figure 3 As shown. The frame of the existing two-roll cold-rolling tube mill is mainly a split frame, which is mainly connected to the left and right arches by four connecting studs. The split open frame also has an upper crossbeam on the upper part of the arch, and the closed frame has an upper crossbeam and the arch as a whole. During the machining and heat treatment process of the traditional split frame, the left and right arches cannot be processed at the same time and need to be processed one by one. Therefore, the symmetry after machining will be reduced, the precision deviation will be large, and the mechanical properties of the left and right arches will be different after heat treatment. These problems will cause large deviations in the size of the finished pipe after rolling or serious wear of the arches with low strength. For the traditional split open frame, obvious stress concentration usually occurs at the junction of the frame arch and the crossbeam. When rolling thick-walled tube steel with high deformation resistance, the stress concentration at the junction may cause plastic strain in the crossbeam or the frame arch, resulting in poor dimensional accuracy of the cold-rolled tube and, in severe cases, shortening the life of the rolling mill.

[0004] Therefore, it is necessary to provide a door-shaped closed integral frame of a reciprocating cold rolling mill to solve the above problems. Utility Model Content

[0005] Based on the above-mentioned problems existing in the prior art, the purpose of the embodiments of the present application is to provide a gate-shaped closed integral frame of a reciprocating cold rolling mill to solve technical problems such as low symmetry of the traditional separate frame, large stress concentration between the beam and the frame arch, and large deviation in processing accuracy and mechanical properties.

[0006] The technical solution adopted by the present application to solve its technical problems is: a gate-shaped closed integral frame of a reciprocating cold rolling tube mill, including a gate-shaped closed integral frame, the gate-shaped closed integral frame is integrally cast, the gate-shaped closed integral frame includes two archways, and a plurality of connecting beams are connected between the two archways, and an integrated gate-shaped structure is formed between the two archways and the connecting beams.

[0007] Furthermore, adjustment bolt holes are provided on both sides of the archway, and the archway is also provided with connecting rod connection holes, weight reduction grooves and rolling assembly baffle positioning holes.

[0008] Furthermore, there are four rolling assembly baffle positioning holes, the specification of which is M12, and the rolling assembly baffle positioning holes are located at the rolling assembly-specific matching position of the gate-shaped closed integral frame.

[0009] Furthermore, the gate-shaped closed integral frame is subjected to quenching and tempering treatment, and the frame hardness is 24-40HRC.

[0010] The beneficial effects of the utility model are:

[0011] 1. The separate upper crossbeam in the traditional open frame is eliminated, and the upper crossbeam and archway are designed as a whole. This structurally reduces the rolling stress concentration caused by assembly problems between the frame and the crossbeam, and improves the rolling stability and the dimensional accuracy of the finished pipe;

[0012] 2. The connecting studs required for assembling the two traditional separate frame arches are eliminated. By setting the door-shaped closed integral frame to a door-shaped integral structure, the assembly deviation between the arch and the connecting studs is avoided, and its structural strength is improved, thereby improving the rolling stability and the dimensional accuracy of the finished pipe after rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0014] Figure 1 This is a front view schematic diagram of a gate-shaped closed integral frame of a reciprocating cold rolling mill in this application;

[0015] Figure 2 This is a left side schematic diagram of a gate-shaped closed integral frame of a reciprocating cold rolling mill in this application;

[0016] Figure 3 This is the overall schematic diagram of the traditional cold rolling mill split open frame;

[0017] In the figure: 1. Archway; 2. Adjustment bolt hole; 3. Connecting rod connection hole; 4. Weight reduction groove; 5. Positioning hole for rolling assembly baffle. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0020] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the accompanying drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the accompanying drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned direction words are not used to limit the present invention.

[0021] like Figure 1-3 As shown, the present application provides a gate-shaped closed integral frame for a reciprocating cold rolling mill, including a gate-shaped closed integral frame, which is cast in one piece. Structurally, the stress concentration at the frame and the crossbeam during the rolling process is reduced, thereby improving rolling safety. Compared with the traditional separate frame in which the left and right arches are heat-treated separately, because the performance of the left and right arches varies greatly due to differences in furnace temperature, holding time, etc. between different batches during the heat treatment process, the overall heat treatment ensures the consistency of the mechanical properties of the entire frame during the heat treatment process, thereby increasing the service life of the frame.

[0022] The gate-shaped closed integral frame consists of two arches 1, with several connecting beams connecting the two arches 1. The two arches 1 and the connecting beams form an integrated gate-shaped structure. By ensuring the high symmetry of the frame arches, the overall machining ensures the consistency of dimensional accuracy, thereby improving the accuracy of the finished product of the pipe rolling.

[0023] Adjustment bolt holes 2 are provided on both sides of the archway 1.

[0024] The rolling assembly assembly of the gate-shaped closed integral frame is equipped with four M12 rolling assembly baffle positioning holes 5

[0025] The memorial arch 1 is also provided with a connecting rod connection hole 3 and a weight-reducing groove 4 .

[0026] The gate-shaped closed integral frame adopts quenching and tempering treatment, and the frame hardness is 24~40HRC.

[0027] The gate-shaped closed integral frame of the reciprocating cold rolling tube mill eliminates the separate upper crossbeam in the traditional open frame, and designs the upper crossbeam and the arch as an integral whole. Structurally, this reduces the rolling stress concentration caused by assembly problems between the frame and the crossbeam, thereby improving the rolling stability and the dimensional accuracy of the finished tubes. At the same time, the connecting studs required for assembling the arches of the two traditional separate frames are eliminated, thereby avoiding assembly deviation between the arches and the connecting studs, improving the structural strength, and further improving the rolling stability and the dimensional accuracy of the finished tubes after rolling.

[0028] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0030] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A gate-shaped closed integral frame of a reciprocating cold rolling mill, characterized in that: The invention comprises a gate-shaped closed integral frame, wherein the gate-shaped closed integral frame is integrally cast and comprises two archways (1), a plurality of connecting beams are connected between the two archways (1), and an integral gate-shaped structure is formed between the two archways (1) and the connecting beams.

2. The gate-shaped closed integral frame of a reciprocating cold rolling mill according to claim 1, characterized in that: Adjustment bolt holes (2) are provided on both sides of the archway (1), and the archway (1) is also provided with connecting rod connection holes (3), weight reduction grooves (4) and rolling assembly baffle positioning holes (5).

3. The gate-shaped closed integral frame of a reciprocating cold rolling mill according to claim 2, characterized in that: Four rolling assembly baffle positioning holes (5) are provided, the specification of the rolling assembly baffle positioning holes (5) is M12, and the rolling assembly baffle positioning holes (5) are located at the rolling assembly special matching position of the gate-shaped closed integral frame.

4. The gate-shaped closed integral frame of a reciprocating cold rolling mill according to claim 1, characterized in that: The gate-shaped closed integral frame is subjected to quenching and tempering treatment, and the frame hardness is 24-40HRC.

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