Clamping method for stabilizing weak-rigidity cantilever part

Abstract

The invention relates to a clamping method for stabilizing a weak-rigidity cantilever part, the weak-rigidity cantilever part is provided with a fixing part and a cantilever part, the fixing part can be fixed on a machining plane, and the cantilever part is suspended relative to the machining plane; according to the clamping method, a wedge-shaped supporting block and a dial indicator are used, the bottom of the wedge-shaped supporting block can horizontally move and slide on the machining plane, the wedge-shaped supporting block can be fixed on the machining plane when moving to a proper position, the upper portion of the wedge-shaped supporting block is an inclined face, and an included angle larger than zero degree is formed between the inclined face and the horizontal plane. The method is not limited by materials and structures of the cantilever parts, can be applied to most of the cantilever parts, is particularly good in use effect on machining of cantilever weak-rigidity parts on aero-engines, successfully solves the problems of deformation and chattering of the cantilever parts in the machining process through application of the method, and is good in application effect, low in implementation cost and suitable for popularization and application. The application range is wide and operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of high-precision machining, and in particular to a stable clamping method for cantilever-like weak-rigidity parts. Background Art

[0002] The processing of cantilever thin-walled parts generally has poor rigidity, and the parts are greatly deformed during processing, accompanied by vibration, which affects the processing accuracy of the parts. In addition, cantilever thin-walled parts are difficult to clamp during the clamping process, which will cause part deformation and fail to meet the processing requirements. Therefore, in the clamping process of cantilever thin-walled parts, it is difficult to ensure that the parts do not deform and reduce vibration, and it is difficult to control the processing size. As a result, thin-walled parts generally have the phenomenon of great processing difficulty, low production efficiency, and low qualified rate. To address this phenomenon, the current common practice is to increase the rigidity of thin-walled parts by adding traditional rigid auxiliary support to the fixture. This support method uses a spiral device for adjustment. After adjustment, the support rod is fixed and processed. During the processing process, the parts will have a certain amount of deformation, and there will be a gap between the support rod and the parts. The conventional clamping method is not ideal and will also lead to increased deformation and vibration. Summary of the invention

[0003] The purpose of the present invention is to provide a method for clamping stable cantilever-type weak-rigidity parts, increase the installation rigidity of such parts on the fixture, improve the strength, reduce part deformation and vibration during processing, and improve processing accuracy.

[0004] The technical solution of the present invention is:

[0005] Provided is a clamping method for a cantilever weak rigidity part, wherein the cantilever weak rigidity part has a fixing portion and a cantilever portion, wherein the fixing portion can be fixed on a processing plane, and the cantilever portion is suspended relative to the processing plane; the clamping method uses a wedge-shaped support block and a micrometer, wherein the bottom of the wedge-shaped support block can translate and slide on the processing plane, and can be fixed on the processing plane when moved to a suitable position, and the upper portion of the wedge-shaped support block is an inclined surface, and the inclined surface forms an angle greater than zero with the horizontal plane;

[0006] The clamping method comprises the following steps:

[0007] Step 1, fix the fixed part of the cantilever weak rigidity part to the processing plane, and make the probe of the micrometer stick to the upper end of the cantilever part of the cantilever weak rigidity part, and keep the pointer of the micrometer in the reference position;

[0008] Step 2, sliding the wedge-shaped support block on the processing plane so that the inclined surface gradually approaches the cantilever;

[0009] Step 3, making the wedge-shaped support block touch the lower end of the cantilever part of the cantilever weak rigidity part, when the pointer of the micrometer swings, and the swing amplitude or the change of the micrometer value does not exceed the preset range, stop the wedge-shaped support block, and fix the wedge-shaped support block on the processing plane;

[0010] Step 4, pouring curable glue at the contact support position between the wedge-shaped support block and the cantilever part, so that the glue wraps the wedge-shaped support block from the processing plane and extends to the side of the workpiece, and the thickness of the glue in contact with the side of the workpiece does not exceed 1 / 3 of the thickness of the side of the workpiece;

[0011] Step 5: After the glue is solidified, it forms a rigid support with the wedge-shaped support block.

[0012] Furthermore, the curable adhesive is J-39 room temperature curing adhesive.

[0013] Furthermore, the preset range is within 0.01 mm.

[0014] Furthermore, the inclined surface of the wedge-shaped support block forms an angle of 3°-5° with the horizontal plane.

[0015] Furthermore, the wedge-shaped support block is made of nylon, wood or hard plastic.

[0016] Furthermore, the wedge-shaped support block is also provided with an axial hole, the axial hole is provided with a rotating shaft, the rotating shaft is formed with an eccentric cam, and the eccentric cam is located on the side of the cantilever part. Rotating the rotating shaft can make the eccentric cam contact and support the cantilever part from the side.

[0017] Furthermore, the wedge-shaped support block is also provided with a threaded hole, in which a screw is fitted, and the screw also passes through the eccentric cam, so that the eccentric cam and the wedge-shaped support block can be locked and fixed as a whole, and the eccentric cam is located on the side of the cantilever part. Rotating the eccentric cam can make the eccentric cam contact and support the cantilever part from the side.

[0018] Furthermore, the wedge-shaped support block is a component, and the angle between the inclined surface of each wedge-shaped support block in the component and the horizontal plane is different.

[0019] Furthermore, the curable adhesive wraps the rear portion of the wedge-shaped support block.

[0020] Furthermore, the wedge-shaped support blocks in step 3 are multiple and distributed in a herringbone shape, and slide translationally from the front end and both sides of the cantilever part to the cantilever part respectively.

[0021] Furthermore, the cross-section of the wedge-shaped support block is trapezoidal or rectangular.

[0022] As a preferred technical solution of the present invention, the angle wedge block can only provide multi-point support for cantilever spaces of different heights, and is not affected by the unevenness of the supporting surface, thereby producing repeated positioning, achieving arbitrary support, and being flexible and convenient to use.

[0023] As a preferred technical solution of the present invention, the eccentric cam can adjust the distance according to the different positions and sizes of the parts by rotating the eccentric cam and utilizing the eccentric difference between the inner and outer diameters, thereby increasing the partial positioning function of the parts. In addition, the parts can be limited by adjusting themselves at any position on the clamping base, which is flexible and convenient to use.

[0024] The advantages of the present invention are: the present invention changes the traditional rigid support mode, and uses the bonding strength of the angle wedge and the glue after curing to provide a stable clamping method for cantilever parts, thereby improving the strength and installation rigidity of the parts, and also plays a role of bonding and reinforcing the bonding of the parts through the curing glue (especially J39, which has a small deformation after curing and does not affect the accuracy), effectively controlling the deformation of the parts, thereby solving the problem of cantilever parts being unqualified due to deformation during clamping. The method is not limited by the material and structure of the cantilever parts, and can be applied to most cantilever parts, especially for the processing of cantilever weak rigid parts on aircraft engines, and has a good effect. Through the application of this method, the deformation and vibration of cantilever parts during the processing process are successfully solved, and the application effect is good, the implementation cost is low, the application range is wide, and it is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of step 1;

[0026] Figure 2 is a schematic diagram of step 2;

[0027] Figure 3 is a schematic diagram of step 3;

[0028] Figure 4 is a schematic diagram of step 4;

[0029] Figure 5a It is a schematic diagram that both sides of the cantilever are supported by wedge-shaped support blocks;

[0030] Figure 5b It is a comparison diagram of the height of the contact part between the glue and the cantilever part and the side edge of the cantilever part;

[0031] Figure 6 is a schematic diagram of the adhesive wrapping the rear part of the wedge-shaped support block;

[0032] Figure 7 is a top view of a supporting cantilever portion with three wedge-shaped supporting blocks arranged in a herringbone pattern;

[0033] Among them: 1-wedge-shaped support block, 2-cantilever weak rigidity parts, 3-micrometer, 4-curing glue. DETAILED DESCRIPTION

[0034] The disclosed examples will be more fully described with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0035] Provided is a clamping method for a cantilever weak rigidity part, wherein the cantilever weak rigidity part has a fixing portion and a cantilever portion, wherein the fixing portion can be fixed on a processing plane, and the cantilever portion is suspended relative to the processing plane; the clamping method uses a wedge-shaped support block and a micrometer, wherein the bottom of the wedge-shaped support block can translate and slide on the processing plane, and can be fixed on the processing plane when moved to a suitable position, and the upper portion of the wedge-shaped support block is an inclined surface, and the inclined surface forms an angle greater than zero with the horizontal plane;

[0036] The clamping method comprises the following steps:

[0037] Step 1, fix the fixed part of the cantilever weak rigidity part to the processing plane, and make the probe of the micrometer stick to the upper end of the cantilever part of the cantilever weak rigidity part, and keep the pointer of the micrometer in the reference position;

[0038] Step 2, sliding the wedge-shaped support block on the processing plane so that the inclined surface gradually approaches the cantilever;

[0039] Step 3, making the wedge-shaped support block touch the lower end of the cantilever part of the cantilever weak rigidity part, when the pointer of the micrometer swings, and the swing amplitude or the change of the micrometer value does not exceed the preset range, stop the wedge-shaped support block, and fix the wedge-shaped support block on the processing plane;

[0040] Step 4, pouring curable glue at the contact support position between the wedge-shaped support block and the cantilever part, so that the glue wraps the wedge-shaped support block from the processing plane and extends to the side of the workpiece, and the thickness of the glue in contact with the side of the workpiece does not exceed 1 / 3 of the thickness of the side of the workpiece;

[0041] Step 5: After the glue is solidified, it forms a rigid support with the wedge-shaped support block.

[0042] The curable adhesive is J-39 room temperature curing adhesive.

[0043] The preset range is within 0.01 mm.

[0044] The angle between the inclined surface of the wedge-shaped support block and the horizontal plane is 3°-5°.

[0045] The wedge-shaped support block is also provided with an axial hole, a rotating shaft is provided in the axial hole, an eccentric cam is formed on the rotating shaft, and the eccentric cam is located on the side of the cantilever part. By rotating the rotating shaft, the eccentric cam can contact and support the cantilever part from the side.

[0046] The wedge-shaped support block is also provided with a threaded hole, in which a screw is fitted, and the screw also passes through the eccentric cam, so that the eccentric cam and the wedge-shaped support block can be locked and fixed as a whole, and the eccentric cam is located on the side of the cantilever part. Rotating the eccentric cam can make the eccentric cam contact and support the cantilever part from the side.

[0047] The wedge-shaped support block is a component, and the angle between the inclined surface of each wedge-shaped support block in the component and the horizontal plane is different.

[0048] The curing adhesive wraps the rear portion of the wedge-shaped support block.

[0049] The wedge-shaped support blocks in step 3 are multiple and distributed in a herringbone shape, and slide translationally from the front end and both sides of the cantilever part to the cantilever part respectively.

[0050] The cross section of the wedge-shaped support block is rectangular.

[0051] The description of different advantageous arrangements has been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to examples of the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may describe different advantages over other advantageous examples. The selected example or examples are chosen and described in order to best illustrate the principles of the examples, the practical application, and to enable those of ordinary skill in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. A method for clamping a cantilevered weak rigidity part, characterized in that: The cantilever weak rigidity part has a fixing part and a cantilever part, the fixing part can be fixed on the processing plane, and the cantilever part is suspended relative to the processing plane; the clamping method uses a wedge-shaped support block and a micrometer, the bottom of the wedge-shaped support block can translate and slide on the processing plane, and can be fixed on the processing plane when moved to a suitable position, and the upper part of the wedge-shaped support block is an inclined surface, and the inclined surface forms an angle greater than zero with the horizontal plane; The clamping method comprises the following steps: Step 1, fix the fixed part of the cantilever weak rigidity part to the processing plane, and make the probe of the micrometer stick to the upper end of the cantilever part of the cantilever weak rigidity part, and keep the pointer of the micrometer in the reference position; Step 2, sliding the wedge-shaped support block on the processing plane so that the inclined surface gradually approaches the cantilever; Step 3, making the wedge-shaped support block touch the lower end of the cantilever part of the cantilever weak rigidity part, when the pointer of the micrometer swings, and the swing amplitude or the change of the micrometer value does not exceed the preset range, stop the wedge-shaped support block, and fix the wedge-shaped support block on the processing plane; Step 4, pouring curable glue at the contact support position between the wedge-shaped support block and the cantilever part, so that the glue wraps the wedge-shaped support block from the processing plane and extends to the side of the workpiece, and the thickness of the glue in contact with the side of the workpiece does not exceed 1 / 3 of the thickness of the side of the workpiece; Step 5: After the glue is solidified, it forms a rigid support with the wedge-shaped support block.

2. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The curable adhesive is J-39 room temperature curing adhesive.

3. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The preset range is within 0.01 mm.

4. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The angle between the inclined surface of the wedge-shaped support block and the horizontal plane is 3°-5°.

5. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The cross section of the wedge-shaped support block is trapezoidal or rectangular.

6. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The wedge-shaped support block is also provided with an axial hole, a rotating shaft is provided in the axial hole, an eccentric cam is formed on the rotating shaft, and the eccentric cam is located on the side of the cantilever part. By rotating the rotating shaft, the eccentric cam can contact and support the cantilever part from the side.

7. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The wedge-shaped support block is also provided with a threaded hole, in which a screw is fitted, and the screw also passes through the eccentric cam, so that the eccentric cam and the wedge-shaped support block can be locked and fixed as a whole, and the eccentric cam is located on the side of the cantilever part. Rotating the eccentric cam can make the eccentric cam contact and support the cantilever part from the side.

8. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The wedge-shaped support block is a component, and the angle between the inclined surface of each wedge-shaped support block in the component and the horizontal plane is different.

9. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The curing adhesive wraps the rear portion of the wedge-shaped support block.

10. A method for clamping a cantilevered weak rigidity part as claimed in claim 1, characterized in that: The wedge-shaped support blocks in step 3 are multiple and distributed in a herringbone shape, and slide translationally from the front end and both sides of the cantilever part to the cantilever part respectively.

Images