Centering device for cylinder turning

Abstract

A centering device for cylinder turning comprises a cross beam, the cross beam is provided with an upper mounting plane and a side mounting plane perpendicular to the upper mounting plane, a correcting disc is fixedly mounted on the upper mounting plane in the middle of the cross beam, and a plurality of positioning blocks are arranged on the two sides of the correcting disc. A first positioning block and a second positioning block are symmetrically installed on the side installation plane of the cross beam, and the assembling faces of the first positioning block and the second positioning block with the cross beam and the circle center of the correction disc are located in the same plane. According to the scheme, the position of the machining center of the upper half cylinder and the lower half cylinder is found by taking the assembly surface of the cross beam and the two positioning blocks as a reference surface and the correction disc as an auxiliary tool, so that the repeated correction of the inner hole and outer circle machining allowance is avoided, the influence of uncertain factors on the centering effect is avoided, the labor intensity of workers is reduced, and the production efficiency is greatly improved; meanwhile, the scheme also has the advantages of simple structure and simplicity and convenience in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine mechanical processing, in particular to a centering device for cylinder turning. Background Art

[0002] In the prior art, the steam turbine cylinder is an important component of the steam turbine and plays a vital role in the safety and performance of the steam turbine. In the processing of the steam turbine cylinder, the cylinder is divided into two parts, the upper half and the lower half. If the two halves are not accurately aligned when the inner hole and the inner hole groove of the cylinder are machined, it is very easy for the upper and lower halves of the processed cylinder to be different in size.

[0003] At present, it is necessary to repeatedly check the relevant dimensions of the inner hole and the outer circle when centering, and it takes a long time to load and unload. Not only is the efficiency low, but it is also prone to unstable factors, and product quality cannot be well guaranteed. Processing deviations directly affect the mechanical properties of the cylinder and cause serious uncertainty in the subsequent assembly quality. Utility Model Content

[0004] The utility model aims to provide a center calibration device for cylinder turning, by which the turning center position of the cylinder can be quickly and accurately located, thereby improving production efficiency.

[0005] The technical solution adopted by the utility model is: a centering device for cylinder turning, including a crossbeam, the crossbeam having an upper mounting plane and a side mounting plane perpendicular to the upper mounting plane, located in the middle of the crossbeam, a correction disc fixedly mounted on the upper mounting plane, located on both sides of the correction disc, a first positioning block and a second positioning block symmetrically mounted on the side mounting plane of the crossbeam, the first positioning block and the second positioning block are in the same plane with the assembly surface of the crossbeam and the center of the correction disc.

[0006] As a preferred solution, the crossbeam is in the shape of a cuboid, including an upper plane and a long vertical plane and a short vertical plane respectively perpendicular to the upper plane, the correction disc is mounted on the upper plane, and the first positioning block and the second positioning block are mounted on the long vertical plane.

[0007] As a preferred solution, the assembly requirement for the mating surfaces of the crossbeam, the first positioning block, the second positioning block and the correction disc is a clearance of no more than 0.01 mm.

[0008] As a preferred solution, the long vertical surface of the beam must pass through the center of the correction disk, and the deviation tolerance is no more than 0.05 mm.

[0009] As a preferred solution, a lifting ring is provided on the short vertical surface of the crossbeam.

[0010] As a preferred solution, two positioning pins are provided on the upper end of the crossbeam and the correction disc, and the correction disc and the crossbeam are connected by screws.

[0011] The beneficial effects of the utility model are:

[0012] Based on the defects of the prior art, the present invention provides a centering device for cylinder turning. By optimizing the structural design, a correction disc is arranged on the upper mounting plane of the beam, located on both sides of the correction disc, and a first positioning block and a second positioning block are symmetrically installed on the side mounting plane of the beam. The assembly surfaces of the first positioning block and the second positioning block with the beam and the center of the correction disc are in the same plane, so that the assembly surfaces of the beam and the two positioning blocks are used as the reference plane, and the correction disc is used as an auxiliary tool to find the position of the machining center of the upper and lower cylinders, which not only avoids repeated calibration of the inner hole and outer circle machining allowances, but also avoids the influence of uncertain factors on the centering effect, reduces the labor intensity of workers, and greatly improves production efficiency. At the same time, the present invention also has the advantages of simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a top view of the utility model;

[0015] Figure 2 It is a side view of the utility model.

[0016] Figure numerals: 1. beam, 2-1. first positioning plate, 2-2. second positioning plate, 3. correction disc, 4. screw, 5. positioning pin, 6. locking assembly, 7. lifting ring. DETAILED DESCRIPTION

[0017] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0018] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this document shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs; the words "one", "an" or "the" and the like used in the specification and claims of the utility model patent application do not express quantity restrictions, but indicate the existence of at least one; the words "first", "second" and "third" used in this document shall not be regarded as restrictions on the order of components, but are only used to distinguish different components; the words "include" or "comprise" and the like indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function;

[0019] Embodiment 1

[0020] In order to more clearly describe the specific structure and working process of the cylinder turning center calibration device, Figure 1-2 Describe this embodiment:

[0021] As shown in the figure, a centering device for cylinder turning is mainly composed of a crossbeam 1, a first positioning block 2-1, a second positioning block 2-2 and a correction disc 3, wherein the crossbeam 1 has an upper mounting plane and a side mounting plane perpendicular to the upper mounting plane, located in the middle of the crossbeam 1, and a correction disc 3 is fixedly installed on the upper mounting plane, and located on both sides of the correction disc 3, and the first positioning block 2-1 and the second positioning block 2-2 are symmetrically installed on the side mounting plane of the crossbeam 1. 2 are fixedly mounted on the crossbeam 1 through locking assemblies 6 respectively, and the assembly surfaces of the first positioning block 2-1 and the second positioning block 2-2 with the crossbeam 1 and the center of the correction disc 3 are in the same plane, which can also be understood as the assembly surfaces of the first positioning block 2-1 and the second positioning block 2-2 with the crossbeam 1 pass through the center of the correction disc 3. In this way, when the tooling is used in conjunction with the cylinder, the assembly surfaces of the crossbeam and the two positioning blocks are used as reference surfaces, and the correction disc is used as an auxiliary tooling to find the position of the machining center of the upper and lower cylinders.

[0022] The working principle of this scheme is:

[0023] The first positioning block 2-1 and the second positioning block 2-2 are placed tightly against the steps reserved on the upper and lower halves of the cylinder, and the correction disc 3 is adjusted and aligned with the center of the cylinder. The correction and centering of the cylinder are achieved through calibration of the correction disc; thereby quickly and accurately locating the center position of the cylinder during turning, improving production efficiency and ensuring the smooth progress of the production process.

[0024] In this embodiment, the crossbeam 1 is preferably in the shape of a rectangular parallelepiped, which includes an upper plane and a long vertical plane and a short vertical plane respectively perpendicular to the upper plane, wherein the upper plane is the upper mounting plane, the long vertical plane is the side mounting plane, the correction disc 3 is mounted on the upper plane, the first positioning block 2-1 and the second positioning block 2-2 are mounted on the long vertical plane, and a lifting ring 7 is installed on the short vertical plane of the crossbeam 1 to facilitate lifting the device and placing it on the cylinder.

[0025] In this embodiment, the assembly requirement of the matching surfaces of the crossbeam 1, the first positioning block 2-1, the second positioning block 2-2 and the correction disk 3 is that the clearance is no greater than 0.01 mm.

[0026] In this embodiment, the long vertical surface of the beam 1 must pass through the center of the correction disk 3, and the deviation tolerance is no more than 0.05 mm.

[0027] In this embodiment, two positioning pins 5 are provided on the upper end of the beam 1 and the correction disc 3. The correction disc 3 is connected to the beam 1 by screws 4. The two positioning pins 5 cooperate with the screws 4 to complete the positioning and fixing of the correction disc 3 on the beam 1.

[0028] The working process of the centering device for cylinder turning is as follows:

[0029] First, the process steps of the upper and lower parts of the cylinder are used to place the crossbeam of the device close to them, thereby determining the position passing through the center of the cylinder;

[0030] Secondly, use the first positioning block and the second positioning block to accurately determine the center of the cylinder.

[0031] This solution combines the crossbeam 1, the first positioning block 2-1, the second positioning block 2-2 and the correction disc 3 into an integrated structure, takes the assembly surface of the crossbeam and the positioning block as the reference surface, and the first positioning block and the second positioning block are close to the long vertical surface of the crossbeam. The correction disc is used as an auxiliary tool to find the position of the machining center of the upper and lower cylinders. This not only avoids repeated calibration of the inner hole and outer circle machining allowances, but also avoids the influence of uncertain factors on the centering effect, reduces the labor intensity of workers, and greatly improves production efficiency.

[0032] The parts not described in detail in the above embodiments are prior art.

[0033] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A centering device for cylinder turning, characterized in that: The crossbeam comprises an upper mounting plane and a side mounting plane perpendicular to the upper mounting plane, located in the middle of the crossbeam, a correction disc is fixedly mounted on the upper mounting plane, and a first positioning block and a second positioning block are symmetrically mounted on the side mounting plane of the crossbeam, and the assembly surface of the first positioning block and the second positioning block and the center of the correction disc are in the same plane.

2. A centering device for cylinder turning according to claim 1, characterized in that: The crossbeam is in a rectangular parallelepiped shape, including an upper plane and a long vertical plane and a short vertical plane respectively perpendicular to the upper plane. The correction disc is installed on the upper plane, and the first positioning block and the second positioning block are installed on the long vertical plane.

3. A centering device for cylinder turning according to claim 1 or 2, characterized in that: The assembly requirement for the matching surfaces of the crossbeam, the first positioning block, the second positioning block and the correction disc is that the clearance is no greater than 0.01 mm.

4. A centering device for cylinder turning according to claim 3, characterized in that: The long vertical surface of the beam must pass through the center of the correction disk, and the deviation tolerance is no more than 0.05mm.

5. The centering device for cylinder turning according to claim 3, characterized in that: A lifting ring is arranged on the short vertical surface of the crossbeam.

6. The centering device for cylinder turning according to claim 1, characterized in that: Two positioning pins are provided on the upper end of the crossbeam and the correction disc, and the correction disc and the crossbeam are connected by screws.

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