Machining method for split parts

Abstract

The invention relates to the field of part finish machining, in particular to a machining method for a split gas turbine part. According to the machining method, the problem that finish machining of the split parts cannot be achieved can be solved, and meanwhile it can be guaranteed that the size and tolerance of the split parts subjected to finish machining meet the drawing design requirement. Meanwhile, by means of the method, reference can be provided for other multi-petal parts, and the process design period of like products is shortened.

Description

Technical Field

[0001] The invention relates to the field of parts finishing, and more specifically to a method for processing petal-type gas turbine parts. Background Art

[0002] In the machinery manufacturing industry, common petal-type parts mainly include two-petal, three-petal, four-petal, etc. When designing these parts, pin holes, bolt holes and other design features for cylinder merging are designed on the joint surface. During processing, the corresponding cylinder merging tooling is purchased according to the size design of the specific cylinder merging features, and they are assembled together for processing. However, for petal-type parts that do not have structural features such as cylinder merging pin holes and bolt holes, and the number of petals is not less than 6, because there is a gap between the joint surfaces and there are no pin holes, bolt holes and other features for cylinder merging, the parts processed using the traditional processing method of petal-type parts will have serious out-of-tolerance problems during assembly and the assembly process cannot be controlled. Summary of the invention

[0003] The invention solves the problem that a petal-type component cannot be finely processed, and provides a processing method, by which the fine processing of the petal-type component can be completed, ensuring that the component meets the design requirements of the drawing after fine processing.

[0004] The object of the present invention is achieved by providing a method for processing a petal-type component, wherein the petal-type component is composed of a plurality of components connected together, and the method for processing the petal-type component comprises the following steps:

[0005] S1: Rough milling of the large end horizontal surface, and rough milling of the large end horizontal surface and the inner, outer and joint surfaces of each component;

[0006] S2: fine milling the joint surface, first fine milling the first joint surface on one side of each component, the processing size is 1 mm, the first joint surface is clamped with a card board, and then fine milling the second joint surface on the other side of each component;

[0007] S3: Clamping and fine turning: marking the plurality of groups of components in a preset order and clamping them on the workstation to form a petal-type component, fine turning the inner and outer arc surfaces, and first fine turning one side of the horizontal surface of the large end of the clamped petal-type component;

[0008] S4: secondary clamping and fine turning, marking the several groups of components in a preset order and secondary clamping them on the workstation, and then fine turning the other side horizontal surface opposite to the large end horizontal surface to complete the processing.

[0009] In one embodiment, the rough milling allowance of the large end horizontal surface is 4 mm.

[0010] In one embodiment, the rough milling allowances of the inner and outer sides are both 5 mm.

[0011] In one embodiment, the rough milling allowance of the joint surface is 1 mm.

[0012] In one embodiment, one side of the clamping plate is in close contact with the first bonding surface.

[0013] In one embodiment, the gap between the clamping plate and the first bonding surface is less than 0.02 mm.

[0014] In one embodiment, the gap between the clamping plate and the second bonding surface is less than 0.05 mm.

[0015] In one embodiment, a gasket needs to be installed between each of the components during clamping.

[0016] In one embodiment, the thickness of the gasket is 3.17 mm.

[0017] The processing method of the present invention can solve the problem of poor precision in finishing of split-petal parts, and can ensure that the size and tolerance of the split-petal parts after finishing meet the design requirements of the drawings. At the same time, this method can provide reference and reference for other multi-petal parts, shortening the process design cycle of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the assembly of petal-type parts;

[0019] Figure 2 It is the main view of the assembly structure of the petal-type parts;

[0020] Figure 3 A is a schematic diagram of the reference surface structure;

[0021] Figure 4 It is a schematic diagram of the B reference surface structure;

[0022] Figure 5 It is a schematic diagram of a single structure of a petal component;

[0023] Figure 6 A schematic diagram of the marking sequence of the petal parts;

[0024] 100-petal parts, 110-part one, 120-part two, 130-part three, 140-part four, 150-part five, 160-part six, 200-pallet. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] The invention solves the problem that a petal-type component cannot be finely processed, and provides a processing method, by which the fine processing of the petal-type component can be completed, ensuring that the component meets the design requirements of the drawing after fine processing.

[0028] The object of the present invention is achieved by providing a method for processing a petal-type component 100, wherein the petal-type component 100 is composed of a plurality of components connected together, and the method for processing the petal-type component 100 comprises the following steps:

[0029] S1: Rough milling of the large end horizontal surface, respectively rough milling of the large end horizontal surface and the inner, outer and joint surfaces of each of the components; specifically, the large end horizontal surface is the A reference surface, and a machining allowance is reserved according to the fine machining marking reference to facilitate the clamping of the joint surface during fine machining. Preferably, the machining allowance is 4mm; then rough milling of the inner and outer arc surfaces of each of the components, and a machining allowance is reserved according to the fine machining dimensions to leave enough allowance for fine machining, and at the same time facilitate us to use a pallet for inspection when fine machining the joint surface. Preferably, the machining allowance is 5mm; finally, rough milling of the joint surface, and a certain machining allowance is reserved on each side of the joint surface of each component according to the fine machining dimensions to prevent deformation from causing a shortage when fine machining the joint surface. Preferably, the machining allowance is 1mm.

[0030] S2: Fine milling of the joint surface. First, fine mill the first joint surface on one side of each of the components with a processing size of 1 mm. Use a clamping plate 200 to clamp the first joint surface, and then fine mill the second joint surface on the other side of each of the components. Specifically, when fine machining the joint surface, first fine mill the joint surface on one side of each of the components, that is, fine mill 1mm according to the rough milling reference. When fine milling the joint surface of each of the components, it is necessary to use a special clamping plate and laser detection to cooperate with each other for inspection and confirmation to ensure that the angle between the joint surfaces meets the requirements of the drawing. During inspection, when fine-milling the other side of each of the components, it is necessary to first use an inspection pallet for inspection and confirmation, place one side of the pallet 200 close to the mating surface on one side that has been fine-milled, and use a feeler gauge with a thickness of 0.02mm to inspect and ensure the degree of fit between the pallet 200 and the machined mating surface. Ensure that the feeler gauge cannot be inserted into the middle of the pallet 200 and the mating surface, which proves that the pallet 200 fits in place. Then the other side of the pallet 200 is used to inspect whether the mating surface on the other side that needs fine-milling is in place. During inspection, use a feeler gauge with a thickness of 0.05mm for verification. Ensure that the feeler gauge cannot be inserted into the middle of the pallet 200 and the other side of the mating surface, which means that the processing is qualified. The laser is used to ensure that during inspection, the pallet 200 and the machined surface of each component remain horizontal or vertical.

[0031] S3: Clamping and fine turning. Mark the several groups of components in a preset order and clamp them on the workstation to form an assembled state of the petal-type parts. Then fine turn the inner and outer arc surfaces. First, fine turn one side of the horizontal surface of the large end of the clamped petal-type parts. Specifically, each of the components must be marked before clamping. In this embodiment, the petal-type parts are composed of six groups of components, namely component one 110, component two 120, component three 130, component four 140, component five 150, and component six 160. Component two 120 and component five 150 are marked as part No. 2 and part No. 5, respectively. Component one 110, component three 130, component four 140, and component six 160 are marked as part No. 1, part No. 3, part No. 4, and part No. 6, respectively. The marks are marked on the body of the component with a marker or a paint pen to facilitate the second clamping to be in the same order as the first clamping.

[0032] During the first clamping, please note that a gasket needs to be installed between each two joint surfaces. The gasket is assembled based on the B reference surface. The gasket can ensure that the joint surface gap has a force point during the fine turning process, reduce processing deformation, and meet the requirements of the drawing. Preferably, the thickness of the gasket is 3.17mm. During the clamping process, it is necessary to clamp in the order of parts No. 1 to No. 6, and concentrate the error of the joint surface gap between parts No. 1 and No. 6 to reduce the cumulative error.

[0033] S4: Secondary clamping and fine turning, mark the several groups of parts in a preset order and clamp them on the workstation for the second time, and then fine turn the other side of the horizontal plane opposite to the large end horizontal plane to complete the processing. After finishing the A reference side, the workpiece needs to be clamped for the second time to finish the other side opposite to the A reference plane. During the second clamping, it is still necessary to clamp and fix in the order of parts 1 to 6. Note that a gasket needs to be installed between each two joint surfaces. The gasket is assembled with reference to the B reference plane. The gasket can ensure that there is a force point in the gap between the joint surfaces during the fine turning process to reduce processing deformation. Preferably, the thickness of the gasket is 3.17mm.

[0034] Finish turning the inner and outer arc surfaces, first finish turning the A reference side, then the other side. During the second clamping, it is also necessary to clamp in the order of parts 1 to 6 to ensure that the clearance error of the joint surface is between the joint surfaces of parts 1 and 6 during the two finishing processes, reducing the cumulative error.

[0035] The processing method of the present invention can solve the problem that the split-petal parts cannot be processed by fine processing, and at the same time can ensure that the size and tolerance of the split-petal parts after fine processing meet the design requirements of the drawings. At the same time, this method can provide reference and reference for other multi-petal parts, shortening the process design cycle of similar products.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for processing a petal-type component, wherein the petal-type component is composed of a plurality of groups of components connected together, characterized in that: The processing method of the petal-type parts comprises the following steps: S1: Rough milling of the large end horizontal surface, and rough milling of the large end horizontal surface and the inner, outer and joint surfaces of each component; S2: precision milling of the joint surface, first precision milling of the first joint surface on one side of each component, the processing size is 1 mm, the first joint surface is clamped with a card board, and then precision milling of the second joint surface on the other side of each component; S3: Clamping and fine turning: marking the plurality of groups of components in a preset order and clamping them on the workstation to form a petal-type component, fine turning the inner and outer arc surfaces, and first fine turning one side of the horizontal surface of the large end of the clamped petal-type component; S4: secondary clamping and fine turning, marking the several groups of components in a preset order and secondary clamping them on the workstation, and then fine turning the other side horizontal surface opposite to the large end horizontal surface to complete the processing.

2. The method for processing petal-type parts according to claim 1, characterized in that: The rough milling allowance of the large end horizontal surface is 4 mm.

3. The method for processing petal-type parts according to claim 1, characterized in that: The rough milling allowances for the inner and outer sides are both 5 mm.

4. The method for processing petal-type parts according to claim 1, characterized in that: The rough milling allowance of the joint surface is 1 mm.

5. The method for processing petal-type parts according to claim 1, characterized in that: One side of the clamping plate is in close contact with the first bonding surface.

6. The method for processing petal-type parts according to claim 1, characterized in that: The gap between the clamping plate and the first bonding surface is less than 0.02 mm.

7. The method for processing petal-type parts according to claim 1, characterized in that: The gap between the clamping plate and the second bonding surface is less than 0.05 mm.

8. The processing method of petal-type parts according to claim 1 is characterized in that, during clamping, gaskets need to be installed between each of the parts.

9. The processing method of petal-type parts according to claim 8 is characterized in that the thickness of the gasket is 3.17 mm.

Images