Integral welding lathe bed

Abstract

The invention discloses an integral welding lathe bed, which belongs to the technical field of numerical control machine tools, and comprises a welding lathe bed, the welding lathe bed comprises a base and lathe bed bodies, the two lathe bed bodies are symmetrically arranged on the two sides of the base respectively, a connecting main beam is connected between the two lathe bed bodies, and the base, the two lathe bed bodies and the two connecting main beams define a six-face structure shaped like a Chinese character'hui '; the transmission frame is arranged on the top face of the machine tool body, a right-angle step is arranged on the inner side of the transmission frame, a guide rail installation face parallel to the operation direction of the double-gantry machine tool is arranged on the plane of the right-angle step, and a linear motor secondary installation face parallel to the guide rail installation face is arranged on the side face of the right-angle step. The six-face concentric-square-shaped body welding lathe bed structure is light in weight and excellent in bending resistance and torsion resistance, and the overall stability is improved; during rough machining and finish machining, one-time clamping is achieved, the same standard is guaranteed, the precision of a transmission installation face is guaranteed only through the machining performance of a high-precision machine tool, and operation errors caused by split type secondary machining are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of numerical control machine tools, in particular to an integral welding bed. Background Art

[0002] A machining center is a mechanical device used to process materials such as metal, plastic, and glass, and is an important piece of equipment for industrial manufacturing. It can process raw materials into workpieces of the desired shape and size by rotating, moving, and cutting, and is widely used in machinery manufacturing, automobile manufacturing, aerospace, and other industries. The working principle of a machining center involves cutting principles, spindle operation principles, feed motion principles, process parameter control principles, and control system principles.

[0003] With the rapid development of new energy vehicles, integrated die-casting technology is gradually replacing traditional stamping and welding processes. The processing of integrated die-casting frame models has higher process requirements, which has promoted the optimization and development of the bed structure of ultra-high-speed elevated five-axis machining centers.

[0004] At present, the bed of ordinary high-speed elevated five-axis machining center can be generally divided into two types according to the processing technology: welded parts and castings. Casting rams have good vibration absorption and are easy to realize complex structures, but compared with welded structures with the same cross-section or weight, their rigidity is poorer, and with the same rigidity, their weight is significantly higher than that of welded structures. Even for welded bed, the bed is located on both sides of the processing area. The rigidity of the separated bed cannot meet the ultra-high-speed processing requirements of the integrated die-casting frame, and there are inevitable manual errors in assembly accuracy. Summary of the invention

[0005] In order to solve the problems of poor stability and poor machining accuracy of a welding bed in the prior art, the present invention provides an integral welding bed.

[0006] The present invention is achieved through the following technical solutions: An integral welding bed comprises a welding bed, wherein the welding bed comprises a base, a bed body, a transmission frame and a connecting main beam, wherein the bed body is provided with two, the two bed bodies are symmetrically arranged on both sides of the base, two connecting main beams are connected between the two bed bodies, and the base, the two bed bodies and the two connecting main beams form a six-sided "U"-shaped structure; the transmission frame is provided on the top surface of the bed body, and the inner sides of the two transmission frames are provided with right-angle steps, and the plane of the right-angle steps is provided with a guide rail mounting surface parallel to the running direction of a double gantry machine tool, and the side surface of the right-angle steps is provided with a linear motor secondary mounting surface parallel to the guide rail mounting surface.

[0007] A further improvement of the present invention is that the guide rail mounting surface and the linear motor secondary mounting surface are arranged on one side of the inner corner close to the right-angle step.

[0008] A further improvement of the present invention is that a grating ruler mounting surface is also provided on the right-angle step; the grating ruler mounting surface is mounted on the top of the side surface of the right-angle step.

[0009] A further improvement of the present invention is that the welding bed is subjected to thermal aging treatment twice.

[0010] A further improvement of the present invention is that a protective bracket mounting surface is provided on the outer side surface of the bed body.

[0011] A further improvement of the present invention is that a tow chain and a top fence bracket mounting surface are provided on the transmission frame above the above-mentioned protection bracket mounting surface.

[0012] A further improvement of the present invention is that the upper part of the side end surface of the transmission frame and the lower part of the side end surface of the bed body are respectively provided with a partition frame installation surface.

[0013] A further improvement of the present invention is that a tool magazine mounting surface is provided on the base.

[0014] A further improvement of the present invention is that the top surface of the above-mentioned connecting main beam is provided with an integrated die-cast frame turntable mounting surface, and two integrated die-cast frame turntable mounting surfaces are arranged on adjacent sides of the two connecting main beams.

[0015] A further improvement of the present invention is that a lifting hole is provided on the top surface of the transmission frame.

[0016] It can be seen from the above technical scheme that the beneficial effects of the present invention are: the six-sided "U"-shaped welded bed structure is light in weight, has excellent bending and torsion resistance, and improves the overall stability; during rough machining and fine machining, it is clamped at one time to ensure the same reference, relying only on the processing performance of high-precision machine tools to ensure the accuracy of the transmission mounting surface and avoid operational errors caused by split secondary machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a front view of a specific embodiment of the present invention.

[0019] Figure 2 It is a top view of a specific embodiment of the present invention.

[0020] Figure 3 It is a side view of a specific embodiment of the present invention.

[0021] In the attached figure: A, base; B, bed body; C, transmission frame; D, connecting main beam; 1, guide rail mounting surface; 2, linear motor secondary mounting surface; 3, grating scale mounting surface; 4, tool magazine mounting surface; 5, integrated die-cast frame turntable mounting surface; 6, lifting hole; 7, protective bracket mounting surface; 8, drag chain and top fence bracket mounting surface; 9, compartment frame mounting surface; 10, ceiling protection guide rail mounting surface. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] like Figure 1-3 As shown, an integral welding bed includes a welding bed, the welding bed includes a base A, a bed body B, a transmission frame C and a connecting main beam D, the bed body B is provided with two, the two bed bodies B are symmetrically arranged on both sides of the base A, two connecting main beams D are connected between the two bed bodies B, the base A, the two bed bodies B and the two connecting main beams D form a six-sided "U"-shaped structure; the top surface of the bed body B is provided with the transmission frame C, the inner sides of the two transmission frames C are provided with right-angle steps, the two right-angle steps are arranged on the adjacent side of the two gantry frames, the plane of the right-angle step is provided with a guide rail mounting surface 1 parallel to the running direction of the double gantry machine tool, and the side of the right-angle step is provided with a linear motor secondary mounting surface 2 parallel to the guide rail mounting surface 1. The guide rail mounting surface 1 and the linear motor secondary mounting surface 2 are arranged on the inner corner side close to the right-angle step.

[0024] The bed body B includes two columns, and the two ends of the transmission frame C are respectively connected to the top surfaces of two columns belonging to the same bed body B; the two ends of the connecting main beam D are respectively connected to the upper parts of the two opposite columns of the bed body B; the base A includes four horizontal columns, which are distributed in a ring shape and connected between two adjacent columns.

[0025] A grating ruler mounting surface 3 is also provided on the right-angle step; the grating ruler mounting surface 3 is mounted on the top of the side surface of the right-angle step.

[0026] The inner side surface of the bed body B is provided with a ceiling protection rail installation surface 10, and the ceiling protection rail installation surface 10 is located above the connecting main beam D.

[0027] The outer side surface of the bed body B is provided with a protective bracket mounting surface 7.

[0028] A tow chain and top fence bracket mounting surface 8 are provided on the transmission frame C above the protection bracket mounting surface 7.

[0029] The upper part of the side end surface of the transmission frame C and the lower part of the side end surface of the bed body B are respectively provided with a partition frame installation surface 9.

[0030] The base A is symmetrically provided with tool magazine mounting surfaces 4, and two tool magazine mounting surfaces 4 are respectively provided on two opposite horizontal columns of the bed body B.

[0031] The top surface of the connecting main beam D is provided with an integrated die-cast frame turntable mounting surface 5 , and two integrated die-cast frame turntable mounting surfaces 5 are arranged on adjacent sides of the two connecting main beams D.

[0032] The top surface of the transmission frame C is provided with a lifting hole 6.

[0033] First, according to the overall dimensions of the integrated die-casting frame and the required processing elements, the three-axis travel of the ultra-high-speed elevated five-axis machining center is determined based on the integrated die-casting frame turntable mounting surface 5, thereby determining the minimum overall dimensions of the integrated welding bed. According to the processing feed speed and maximum moving speed of the gantry required for the die-casting frame, the drive form is determined to be a linear motor drive, thereby determining the size of the secondary mounting surface 2 of the linear motor. In order to maximize the transmission effect, the distance between the linear motor drive and the guide rail installation needs to be reduced to a minimum, and the transmission efficiency is maximized, thereby determining the position of the secondary mounting surface 2 of the linear motor and the guide rail mounting surface 1. At present, the positioning accuracy of the ultra-high-speed elevated five-axis machining center depends largely on the accuracy of the grating ruler. In order to make the positioning accuracy of the machining center more reliable, the grating ruler installation position needs to be as close to the transmission parts as possible, thereby determining the grating ruler installation surface 3. In addition, the improvement of the degree of automation requires the realization of the automatic tool change function. In order to change the tool more stably, the position of the tool magazine installation surface 4 is determined according to the X-axis travel and the Z-axis travel, as far away from the processing area as possible. For the above main processing surfaces, whole plate cutting, embedded welding structure and plug welding technology are adopted to improve the contact rigidity of each component and meet higher dynamic response requirements.

[0034] For the peripheral area, firstly, the installation height of the top fence brackets on both sides is limited according to the transportation height. In order to enhance the strength, the reserved drag chain and top fence bracket installation surface 8 are added. In order to improve the installation efficiency of the overall protection in the later stage, the corresponding protection bracket installation surface 7 and pre-made holes are reserved. Due to the improvement of integration, the ultra-high-speed elevated five-axis machining center needs to be hoisted as a whole, and the positions of the compartment frame installation surface 9 and the lifting hole 6 are reasonably arranged to provide maximum stability for the overall hoisting. In addition, due to the limitation of processing materials and high environmental protection standards, the processing area needs to be effectively protected, so the corresponding ceiling protection rail installation surface 10 is reserved.

[0035] The welding bed is subjected to two heat aging treatments; after the welding of the integrated welding bed is completed, a heat aging treatment is performed to eliminate welding internal stress; after the rough machining of the shape of the integrated welding bed, a heat aging treatment is performed again to eliminate machining residual stress; the fine machining is carried out on a large CNC gantry boring and milling machine, and a free clamping method is used for high-speed light cutting, which minimizes residual stress and ensures the performance advantages of the bed.

[0036] The one-piece welding bed described in the present invention has a welding bed structure that is light in weight and has excellent bending and torsion resistance. All the joints connected with the transmission are made of whole plate blanking and an embedded welding structure, which significantly improves the contact rigidity with the transmission components and can meet very high dynamic response requirements. All the inner cavity ribs are reasonably distributed, and the weight-reducing openings of the ribs are optimally designed to minimize the weight of the welding bed while ensuring the strength of the welding bed itself. This allows the one-piece welding bed to be clamped and lifted at one time, making installation and operation convenient. The base is a six-sided "U"-shaped base structure, and the bottom anchor bolt adjustment pad iron installation surface is evenly arranged, with a large support area to improve the overall stability. The two sides of the "U"-shaped base are cantilevered with a low box structure, whole plate blanking, embedded structure, and plug welding process, as the transmission installation base, to ensure the strength and rigidity of the machine tool, and during rough machining and fine machining, it is clamped at one time to ensure the same benchmark, relying only on the processing performance of high-precision machine tools to ensure the accuracy of the transmission installation surface, and avoid operational errors caused by split secondary processing.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0038] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integral welding bed, comprising a welding bed, the welding bed comprising a base (A), a bed body (B), a transmission frame (C) and a connecting main beam (D), the bed body (B) being provided with two, the two bed bodies (B) being symmetrically arranged on both sides of the base (A), characterized in that: Two connecting main beams (D) are connected between the two bed bodies (B); the base (A), the two bed bodies (B) and the two connecting main beams (D) enclose a six-sided "U"-shaped structure; the top surface of the bed body (B) is provided with the transmission frame (C); the inner sides of the two transmission frames (C) are provided with right-angle steps; the plane of the right-angle steps is provided with a guide rail mounting surface (1) parallel to the running direction of the double gantry machine tool; and the side surface of the right-angle steps is provided with a linear motor secondary mounting surface (2) parallel to the guide rail mounting surface (1).

2. The integral welding bed according to claim 1, characterized in that: The guide rail mounting surface (1) and the linear motor secondary mounting surface (2) are arranged on one side of the inner corner close to the right-angle step.

3. The integral welding bed according to claim 2, characterized in that: A grating ruler mounting surface (3) is also provided on the right-angle step; the grating ruler mounting surface (3) is mounted on the top of the side surface of the right-angle step.

4. The integral welding bed according to any one of claims 1 to 3, characterized in that: The welding bed is subjected to two thermal aging treatments.

5. The integral welding bed according to claim 4, characterized in that: The outer side surface of the bed body (B) is provided with a protective bracket mounting surface (7).

6. The integral welding bed according to claim 5, characterized in that: A tow chain and a top fence bracket mounting surface (8) are provided on the transmission frame (C) above the protective bracket mounting surface (7).

7. The integral welding bed according to claim 4, characterized in that: The upper part of the side end surface of the transmission frame (C) and the lower part of the side end surface of the bed body (B) are respectively provided with a partition frame mounting surface (9).

8. The integral welding bed according to claim 4, characterized in that: The base (A) is provided with a tool magazine mounting surface (4).

9. The integral welding bed according to claim 4, characterized in that: An integrated die-cast frame turntable mounting surface (5) is provided on the top surface of the connecting main beam (D), and two integrated die-cast frame turntable mounting surfaces (5) are arranged on adjacent sides of the two connecting main beams (D).

10. The integral welding bed according to claim 4, characterized in that: The top surface of the transmission frame (C) is provided with a lifting hole (6).

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