A milling machine clamp suitable for thin-walled ring block type part machining and a using method thereof

Abstract

The present application relates to a kind of milling machine clamps suitable for thin-walled ring block type parts processing and its using method, support, radial positioning block, axial positioning block and datum positioning block are all arranged on base plate;Radial positioning block center is equipped with angular orientation hole, for cooperating angular orientation pin.Radial positioning block is connected with base plate using screw.Axial positioning block is used for axial positioning part.Axial positioning clamp plate is used for axially compressing part.Radial positioning clamp plate is used for radially compressing part.Radial positioning clamp plate 7 center is equipped with pin hole, is connected with axial positioning block using pin shaft, adopts lever principle under the lower side of compressing part.Radial compression screw is used for radially compressing part.The present application effectively improves the clamping rigidity of thin-walled ring block type part milling process, avoids the tremor in part processing, improves quality stability.

Description

Technical Field

[0001] The present invention relates to the technical field of milling processing of thin-walled ring block parts, and in particular to a milling machine fixture suitable for processing thin-walled ring block parts and a use method thereof. Background Art

[0002] Thin-walled ring block parts, as an important component of rotating products such as aircraft engines and gas turbines, have the characteristics of a wide range of applications, many structural variations, and great processing difficulty. Since these parts are usually cast parts, the raw material state stability is poor. Therefore, the first processing step is usually the milling process of the processing base. However, due to factors such as the complex structure, irregular shape, and poor rigidity of the thin-walled structure of these parts, they are difficult to clamp, have weak clamping rigidity, and unstable processing. This in turn causes problems such as large deformation of the parts after processing, unstable processing quality, high tool consumption, and long processing cycles. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a milling machine fixture suitable for processing thin-walled ring block parts and a method for using the same. The specific technical solution is as follows:

[0004] A milling machine fixture suitable for machining thin-walled ring block parts, comprising a base plate, a radial positioning block, an axial positioning block, an angular positioning pin, a reference positioning block, an axial positioning pressure plate, a radial positioning pressure plate, a radial clamping screw, a lateral auxiliary clamping pressure plate, an axial auxiliary jacking screw, a pin support and a support;

[0005] The support, radial positioning block, axial positioning block and reference positioning block are all arranged on the bottom plate;

[0006] The support includes a mounting base and a mounting ear base, wherein the mounting ear base is arranged on one side of the mounting base; the support is fixed to one side of the base by screws;

[0007] The upper end surface of the mounting seat is provided with a strip groove and a mounting hole, the center of the mounting ear seat is provided with a mounting groove, and mounting ears are provided on both sides of the mounting groove, and screw holes are provided on the mounting ears for installing radial tightening screws;

[0008] The reference positioning block is mounted on the other side of the base corresponding to the support and is fixed to the base by screws;

[0009] The reference positioning block is in a convex shape, and a positioning reference hole is provided on the upper surface for determining the X-axis zero point and the Y-axis zero point of the machining coordinate system;

[0010] The radial positioning block is arranged on the base between the support and the reference positioning block. The outer surface of the radial positioning block is consistent with the inner surface of the thin-walled ring block part. The inner surface of the thin-walled ring block part is buckled on the outer surface of the radial positioning block. The inner surface of the thin-walled ring block part and the radial positioning block are completely fitted during positioning.

[0011] The upper end of the radial positioning block is provided with a notch, the notch is provided with a screw hole, and the axial auxiliary tightening screw is installed in the screw hole for axially assisting in tightening the inner surface of the upper end of the wall ring block part; the center of the lower end of the radial positioning block is provided with an angular positioning hole for matching the angular positioning pin;

[0012] The lower end of the radial positioning block is provided with a bayonet, the side wall is provided with a mounting hole, and the pin support is arranged in the mounting hole;

[0013] One end of the axial positioning block is clamped in the bayonet of the radial positioning block, and the axial positioning block is locked on the base by a screw;

[0014] The center of the axial positioning block is provided with a slot and the axial direction is provided with a pin hole;

[0015] The radial positioning pressure plate is provided with a pin hole in the middle, which is inserted into the slot of the axial positioning block and connected to the axial positioning block through a pin shaft;

[0016] A tightening screw is provided on the radial positioning pressure plate, and the radial positioning pressure plate is pressed against the lower side of the thin-walled ring block part by the tightening screw;

[0017] The angular positioning pins pass through the grid along the outer surface of the thin-walled ring block parts and are plugged into the angular positioning holes of the radial positioning blocks to position the angular direction of the thin-walled ring block parts.

[0018] The center of the lateral auxiliary pressing plate is provided with a pin hole, which is arranged on both sides of the radial positioning block and is connected to the pin support through a pin shaft to fix the lateral auxiliary pressing plate on the radial positioning block;

[0019] A tightening screw is provided at the lower end of the lateral auxiliary pressing plate, and the lateral auxiliary pressing plate is pressed against the side profile of the thin-walled ring block part by the tightening screw;

[0020] The axial positioning pressure plate is provided with a U-shaped opening at one end and a strip-shaped opening at the center;

[0021] The axial positioning pressure plate is arranged on the support and connected to the mounting seat of the support through a bolt passing through the strip-shaped opening. The support is arranged in the strip-shaped opening to support one end of the axial positioning pressure plate.

[0022] The other end of the axial positioning pressure plate is overlapped on the mounting groove of the mounting ear seat, and the end of the axial positioning pressure plate is provided with a notch, which extends out of the mounting groove and is clamped on the angular positioning pin, so as to position and press the thin-walled ring block parts in the axial direction;

[0023] The axial positioning pressure plate can slide back and forth in the strip-shaped opening, and the axial tightening force can be controlled by adjusting the depth of the bolt in the support mounting hole;

[0024] The radial compression screw passes through the screw hole on the mounting ear to radially compress the outer surface of the thin-walled ring block part.

[0025] The milling machine fixture suitable for processing thin-walled ring block parts is preferably configured such that the upper surface of the reference positioning block is at the same height as the axial positioning block, and is used to determine the height reference of the milling machine fixture, i.e., the Z-axis zero point of the processing coordinate system;

[0026] The side surface of the reference positioning block is parallel to the center of the angular positioning pin and is used to determine the angular reference of the milling machine fixture, that is, the C-axis zero point of the machining coordinate system.

[0027] The milling machine fixture suitable for processing thin-walled ring block parts has a preferred solution in which the height of the axial positioning block is set according to the thin-walled ring block parts to ensure that the lower end face of the thin-walled ring block parts fits with the end face of the axial positioning block.

[0028] A method for using a milling machine fixture suitable for machining thin-walled ring block parts comprises the following steps:

[0029] Step 1: Place the thin-walled ring block part on the axial positioning block to ensure that the inner surface of the part fits the outer surface of the radial positioning block;

[0030] Step 2: Insert the angular locating pin into the grid of the thin-walled ring block part, and ensure that the angular locating pin fits tightly with the angular locating hole on the radial locating block;

[0031] Step 3: Use the axial positioning plate to pre-tighten the thin-walled ring block parts to ensure that the thin-walled ring block parts cannot be shaken manually; at the same time, check the gap between the thin-walled ring block parts and the axial positioning block. A 0.03mm feeler gauge cannot pass through.

[0032] Step 4: Use radial compression screws to tighten the outer surface of the thin-walled ring block parts; at the same time, check the gap between the thin-walled ring block parts and the radial positioning block. A 0.03mm feeler gauge cannot pass through.

[0033] Step 5: Use radial positioning plate to press thin-walled ring block parts;

[0034] Step 6: Use the axial positioning plate to press the thin-walled ring block parts;

[0035] Step 7: Use the lateral auxiliary clamping plate to assist in clamping thin-walled ring block parts to reduce vibration during part processing;

[0036] Step 8: Use axial auxiliary tightening screws to assist in tightening thin-walled ring block parts to reduce vibration during part processing;

[0037] Step 9. Use a dial indicator to align the reference positioning block to determine the part processing coordinate system.

[0038] Step 10: Mill the upper surface of the thin-walled ring block parts.

[0039] Beneficial effects

[0040] Compared with the prior art, the present invention has the following beneficial technical effects:

[0041] The technical solution of this invention analyzes and understands the structural characteristics of thin-walled ring-block parts to identify the primary factors influencing machining quality. Based on the part's structural dimensions, the milling machine fixture's positioning, clamping, and auxiliary mechanisms are determined. Compared to conventional fixtures, the application of this invention significantly improves clamping rigidity and positioning accuracy during part milling, eliminating vibration during machining. This, in turn, improves machining efficiency and quality consistency, reduces tool consumption and machining deformation, and saves costs for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of a milling machine fixture suitable for machining thin-walled ring block parts;

[0043] Figure 2 This is a top view of a milling machine fixture suitable for machining thin-walled ring block parts;

[0044] Figure 3 This is a schematic diagram of the distribution of support blocks, radial positioning blocks, and reference positioning blocks on the base plate;

[0045] Figure 4 This is a cross-sectional view of a milling machine fixture suitable for machining thin-walled ring block parts;

[0046] Figure 5 This is a schematic diagram of the installation of the side auxiliary pressing plate.

[0047] In the figure: 1-base plate, 2-radial positioning block, 3-axial positioning block, 4-angular positioning pin, 5-reference positioning block, 6-axial positioning pressure plate, 7-radial positioning pressure plate, 8-radial clamping screw, 9-lateral auxiliary clamping pressure plate, 10-axial auxiliary clamping screw, 11-pin bracket, 12-support, 13-thin-walled ring block parts, 14-mounting seat, 15-mounting ear seat, 16-strip groove, 17-mounting hole, 18-mounting slot, 19-mounting ear, 20-positioning reference hole, 21-angular positioning hole, 22-bayonet, 23-slot, 24-U-shaped opening, 25-strip opening, 26-pillar. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-5 The present invention is described in detail, but the protection scope of the present invention is not limited by the accompanying drawings.

[0049] A milling machine fixture suitable for machining thin-walled ring block parts, comprising a base plate 1, a radial positioning block 2, an axial positioning block 3, an angular positioning pin 4, a reference positioning block 5, an axial positioning pressure plate 6, a radial positioning pressure plate 7, a radial clamping screw 8, a lateral auxiliary clamping pressure plate 9, an axial auxiliary tightening screw 10, a pin support 11, and a support 12;

[0050] The support 12, radial positioning block 2, axial positioning block 3 and reference positioning block 5 are all arranged on the base plate 1;

[0051] The support 12 includes a mounting base 14 and a mounting ear base 15, and the mounting ear base 15 is arranged on one side of the mounting base 14; the support 12 is fixed to one side of the base 1 by screws;

[0052] The upper end surface of the mounting seat 14 is provided with a strip groove 16 and a mounting hole 17. The center of the mounting ear seat 15 is provided with a mounting groove 18, and mounting ears 19 are provided on both sides of the mounting groove 18. The mounting ears 19 are provided with screw holes for installing radial compression screws 8.

[0053] The reference positioning block 5 is mounted on the other side of the base 1 corresponding to the support 12 and is fixed to the base 1 by screws;

[0054] The reference positioning block 5 is in a convex shape, and a positioning reference hole 20 is provided on the upper surface thereof for determining the X-axis zero point and the Y-axis zero point of the machining coordinate system;

[0055] The radial positioning block 2 is arranged on the base 1 between the support 12 and the reference positioning block 5. The outer surface of the radial positioning block 2 is consistent with the inner surface size of the thin-walled ring block part 13. The inner surface of the thin-walled ring block part 13 is buckled on the outer surface of the radial positioning block 2. The inner surface of the thin-walled ring block part 13 is completely fitted with the radial positioning block 2 during positioning.

[0056] The upper end of the radial positioning block 2 is provided with a notch, and the notch is provided with a screw hole. The axial auxiliary tightening screw 10 is installed in the screw hole to axially assist in tightening the inner surface of the upper end of the thin-walled ring block part 13; the center of the lower end of the radial positioning block 2 is provided with an angular positioning hole 21 for matching the angular positioning pin 4;

[0057] The lower end of the radial positioning block 2 is provided with a bayonet 22, and the side wall is provided with a mounting hole, and the pin support 11 is arranged in the mounting hole;

[0058] One end of the axial positioning block 3 is clamped in the bayonet 22 of the radial positioning block 2, and the axial positioning block 3 is locked on the base 1 by screws;

[0059] The center of the axial positioning block 3 is provided with a slot 23 and the axial direction is provided with a pin hole;

[0060] The radial positioning plate 7 is provided with a pin hole in the middle, which is inserted into the slot 23 of the axial positioning block 3 and is connected to the axial positioning block 3 through a pin shaft;

[0061] A tightening screw is provided on the radial positioning pressure plate 7, and the radial positioning pressure plate 7 is pressed against the lower side of the thin-walled ring block part 13 by the tightening screw;

[0062] The outer surface of the thin-walled ring block part 13 of the angular positioning pin 4 passes through the grid and is plugged into the angular positioning hole 21 of the radial positioning block 2 to position the angular direction of the thin-walled ring block part 13;

[0063] The center of the lateral auxiliary pressing plate 9 is provided with a pin hole, which is arranged on both sides of the radial positioning block 2 and is connected to the pin support 11 through a pin shaft to fix the lateral auxiliary pressing plate 9 on the radial positioning block 2;

[0064] A tightening screw is provided at the lower end of the lateral auxiliary pressing plate 9, and the lateral auxiliary pressing plate 9 is pressed against the side profile of the thin-walled ring block part 13 by the tightening screw;

[0065] The axial positioning pressure plate 6 is provided with a notch 24 at one end and a strip-shaped opening 25 at the center;

[0066] The axial positioning pressure plate 6 is arranged on the support 12 and connected to the mounting seat 14 of the support 12 by means of bolts passing through the strip opening 25. The support 26 is arranged in the strip opening 25 to support one end of the axial positioning pressure plate 6.

[0067] The other end of the axial positioning pressure plate 6 is overlapped on the mounting groove 18 of the mounting ear seat 15, and the notch 24 extends out of the mounting groove 18 and is clamped on the angular positioning pin 4, which is used to position and press the thin-walled ring block part 13 in the axial direction;

[0068] The axial positioning pressure plate 6 can slide back and forth in the strip-shaped opening 25, and the axial tightening force can be controlled by adjusting the depth of the bolt in the mounting hole 17 of the support 12;

[0069] The radial compression screws 8 pass through the screw holes on the mounting ears 19 to radially compress the outer surface of the thin-walled ring block part 13 .

[0070] The upper surface of the reference positioning block 5 is consistent with the height of the axial positioning block 3, and is used to determine the height reference of the milling machine fixture, that is, the Z-axis zero point of the machining coordinate system;

[0071] The side surface of the reference positioning block 5 is parallel to the center of the angular positioning pin 4 and is used to determine the angular reference of the milling machine fixture, that is, the C-axis zero point of the machining coordinate system.

[0072] The height of the axial positioning block 3 is set according to the thin-walled ring block-like component 13 to ensure that the lower end surface of the thin-walled ring block-like component 13 fits the end surface of the axial positioning block 3.

[0073] A method for using a milling machine fixture suitable for machining thin-walled ring block parts comprises the following steps:

[0074] Step 1: Place the thin-walled ring block part 13 on the axial positioning block 3, ensuring that the inner surface of the part 13 fits the outer surface of the radial positioning block 2;

[0075] Step 2: Insert the angular positioning pin 4 into the grid of the thin-walled ring block part 13, and ensure that the angular positioning pin 13 fits tightly with the angular positioning hole on the radial positioning block 2;

[0076] Step 3: Use the axial positioning plate 6 to pre-tighten the thin-walled ring block part 13 to ensure that the thin-walled ring block part 13 cannot be shaken manually; at the same time, check the gap between the thin-walled ring block part 13 and the axial positioning block 3. A 0.03mm feeler gauge cannot pass through.

[0077] Step 4: Use the radial compression screw 8 to tighten the outer surface of the thin-walled ring block part 13; at the same time, check the gap between the thin-walled ring block part 13 and the radial positioning block 2. A 0.03mm feeler gauge cannot pass through.

[0078] Step 5: Use the radial positioning plate 7 to press the thin-walled ring block part 13;

[0079] Step 6: Use the axial positioning pressing plate 6 to press the thin-walled ring block part 13;

[0080] Step 7: Use the lateral auxiliary pressing plate 9 to assist in clamping the thin-walled ring block part 13 to reduce vibration during part processing;

[0081] Step 8: Use the axial auxiliary tightening screw 10 to assist in tightening the thin-walled ring block part 13 to reduce vibration during part processing;

[0082] Step 9. Use a dial indicator to align the reference positioning block 5 to determine the part processing coordinate system.

[0083] Step 10: milling the upper surface of the thin-walled ring block part 13.

Claims

1. A milling machine fixture suitable for machining thin-walled ring block parts, characterized by: It includes a base plate, a radial positioning block, an axial positioning block, an angular positioning pin, a reference positioning block, an axial positioning pressure plate, a radial positioning pressure plate, a radial tightening screw, a lateral auxiliary tightening pressure plate, an axial auxiliary tightening screw, a pin support and a support; The support, radial positioning block, axial positioning block and reference positioning block are all arranged on the bottom plate; The support includes a mounting base and a mounting ear base, wherein the mounting ear base is arranged on one side of the mounting base; the support is fixed to one side of the base by screws; The upper end surface of the mounting seat is provided with a strip groove and a mounting hole, the center of the mounting ear seat is provided with a mounting groove, and mounting ears are provided on both sides of the mounting groove, and screw holes are provided on the mounting ears for installing radial tightening screws; The reference positioning block is mounted on the other side of the base corresponding to the support and is fixed to the base by screws; The reference positioning block is in a convex shape, and a positioning reference hole is provided on the upper surface for determining the X-axis zero point and the Y-axis zero point of the machining coordinate system; The radial positioning block is arranged on the base between the support and the reference positioning block. The outer surface of the radial positioning block is consistent with the inner surface of the thin-walled ring block part. The inner surface of the thin-walled ring block part is buckled on the outer surface of the radial positioning block. The inner surface of the thin-walled ring block part and the radial positioning block are completely fitted during positioning. The upper end of the radial positioning block is provided with a notch, the notch is provided with a screw hole, and the axial auxiliary tightening screw is installed in the screw hole for axially assisting in tightening the inner surface of the upper end of the wall ring block part; the center of the lower end of the radial positioning block is provided with an angular positioning hole for matching the angular positioning pin; The lower end of the radial positioning block is provided with a bayonet, the side wall is provided with a mounting hole, and the pin support is arranged in the mounting hole; One end of the axial positioning block is clamped in the bayonet of the radial positioning block, and the axial positioning block is locked on the base by a screw; The center of the axial positioning block is provided with a slot and the axial direction is provided with a pin hole; The radial positioning pressure plate is provided with a pin hole in the middle, which is inserted into the slot of the axial positioning block and connected to the axial positioning block through a pin shaft; A tightening screw is provided on the radial positioning pressure plate, and the radial positioning pressure plate is pressed against the lower side of the thin-walled ring block part by the tightening screw; The angular positioning pins pass through the grid along the outer surface of the thin-walled ring block parts and are plugged into the angular positioning holes of the radial positioning blocks to position the angular direction of the thin-walled ring block parts. The center of the lateral auxiliary pressing plate is provided with a pin hole, which is arranged on both sides of the radial positioning block and is connected to the pin support through a pin shaft to fix the lateral auxiliary pressing plate on the radial positioning block; A tightening screw is provided at the lower end of the lateral auxiliary pressing plate, and the lateral auxiliary pressing plate is pressed against the side profile of the thin-walled ring block part by the tightening screw; The axial positioning pressure plate is provided with a U-shaped opening at one end and a strip-shaped opening at the center; The axial positioning pressure plate is arranged on the support and connected to the mounting seat of the support through a bolt passing through the strip-shaped opening. The support is arranged in the strip-shaped opening to support one end of the axial positioning pressure plate. The other end of the axial positioning pressure plate is overlapped on the mounting groove of the mounting ear seat, and the end of the axial positioning pressure plate is provided with a notch, which extends out of the mounting groove and is clamped on the angular positioning pin, so as to position and press the thin-walled ring block parts in the axial direction; The axial positioning pressure plate can slide back and forth in the strip-shaped opening, and the axial tightening force can be controlled by adjusting the depth of the bolt in the support mounting hole; The radial compression screw passes through the screw hole on the mounting ear to radially compress the outer surface of the thin-walled ring block part.

2. A milling machine fixture suitable for machining thin-walled ring block parts according to claim 1, characterized in that: The upper surface of the reference positioning block is consistent with the height of the axial positioning block, and is used to determine the height reference of the milling machine fixture, that is, the Z-axis zero point of the machining coordinate system; The side surface of the reference positioning block is parallel to the center of the angular positioning pin and is used to determine the angular reference of the milling machine fixture, that is, the C-axis zero point of the machining coordinate system.

3. The milling machine fixture suitable for machining thin-walled ring block parts according to claim 1, characterized in that: The height of the axial positioning block is set according to the thin-walled ring block type part to ensure that the lower end surface of the thin-walled ring block type part fits with the end surface of the axial positioning block.

4. A method for using a milling machine fixture suitable for machining thin-walled ring block parts according to any one of claims 1 to 3, characterized in that: The steps include: Step 1: Place the thin-walled ring block part on the axial positioning block to ensure that the inner surface of the part fits the outer surface of the radial positioning block; Step 2: Insert the angular locating pin into the grid of the thin-walled ring block part, and ensure that the angular locating pin fits tightly with the angular locating hole on the radial locating block; Step 3: Use the axial positioning plate to pre-tighten the thin-walled ring block parts to ensure that the thin-walled ring block parts cannot be shaken manually; at the same time, check the gap between the thin-walled ring block parts and the axial positioning block. A 0.03mm feeler gauge cannot pass through. Step 4: Use radial compression screws to tighten the outer surface of the thin-walled ring block parts; at the same time, check the gap between the thin-walled ring block parts and the radial positioning block. A 0.03mm feeler gauge cannot pass through. Step 5: Use radial positioning plate to press thin-walled ring block parts; Step 6: Use the axial positioning plate to press the thin-walled ring block parts; Step 7: Use the lateral auxiliary clamping plate to assist in clamping thin-walled ring block parts to reduce vibration during part processing; Step 8: Use axial auxiliary tightening screws to assist in tightening thin-walled ring block parts to reduce vibration during part processing; Step 9. Use the dial indicator to align the reference positioning block to determine the part processing coordinate system; Step 10: Mill the upper surface of the thin-walled ring block parts.

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