CN116021056A - Processing device and processing method for circumferential upper holes of air inlet channel connecting flange - Google Patents

Abstract

The invention belongs to the machining technology, and relates to a device and a method for machining holes on the circumference of an air inlet connecting flange; the device comprises a base, a step drill sleeve, a step fixing pin, a drill jig, a copper bush, a positioning block, a rotating shaft, a fixing base plate, a fixing bolt, a positioning bolt and a reticulate pattern handle; through ingenious structure assembly design, the hole on the circumference of the product can be processed through the bench drilling machine and replace five-axis lathe numerical control programming drilling and processing, and the hole size precision, the relative position and the relative angle on the circumference of the connecting flange that is processed are qualified simultaneously, and the quality is stable, has greatly shortened part clamping, alignment, programming and processing time, has improved part machining efficiency by a wide margin, has practiced thrift the processing cost. The fixture device is simple in structure and convenient to operate, realizes reasonable and reliable positioning and clamping of parts, reduces the operation difficulty of workers, and can meet the requirement of mass production.

Description

A device and method for processing holes on the circumference of an inlet connecting flange

technical field

The invention belongs to the mechanical processing technology, and relates to a device and a processing method for processing holes on the circumference of an inlet connecting flange.

Background technique

In the assembly of the helicopter structure, a large number of connecting flanges are used. The material of the connecting flange is 0Cr18Ni9 stainless steel (forging), which is a thin-walled stainless steel part and is an important exhaust component of the air inlet; its maximum external dimension is φ354.8mm ×25.5mm, the structure is shown in Figure 1. On the circumference of the connecting flange, there are two rows of ventilation holes φ2 ₀ ^+0.1 mm in total, 24 places in total; a row of riveting holes φ2mm in the middle of the two rows of ventilation holes, 17 places in total.

The traditional processing scheme of the hole on the circumference of the connecting flange is to use the five-axis machine tool to perform numerical control programming and drilling according to the digital model. Although this method can ensure the accuracy, relative position and relative angle of the hole on the product circumference, it is difficult to clamp the product and the processing The difficulty is high, the processing time is long, the processing efficiency is low, and the processing cost is high.

Contents of the invention

The purpose of the present invention is to provide a hole processing device and processing method on the circumference of the connecting flange, which uses a fitter's drilling machine to replace the five-axis machine tool CNC programming drilling processing, so as to solve the problems of difficult clamping, high processing difficulty and low processing efficiency. problems, while ensuring the dimensional accuracy, relative position and relative angle of the holes on the product circumference.

Technical solution: On the one hand, the present invention proposes a hole processing device on the circumference of the inlet connecting flange, including a base, a step drill sleeve, a step fixing pin, a drilling mold, a copper bush, a positioning block, a rotating shaft, a fixing backing plate, Fixing bolts, positioning bolts, textured handles; step drill sleeves are installed into the step holes of the upper plate of the base through interference fit; the rotating shaft is installed and fixed in the shaft mounting holes of the vertical plate of the base through nut washers; copper bushings are installed through interference fit The bushing installation hole at the center of the drilling jig; the positioning block is installed and fixed in the positioning groove of the drilling jig by cross-recessed countersunk head screws; the drilling jig is integrally installed on the shaft through the interference-fit copper bushing; the connecting flange is installed through the positioning block On the outer circle of the step of the drilling template; the fixed backing plate presses and fixes the connecting flange on the bottom surface of the step through the fixing bolt and the threaded hole a; the positioning bolt is installed in the threaded hole b on the drilling template; the textured handle fits through the thread Installed on the rotating shaft, the upper plate of the base is provided with step holes for interference installation of step drill sleeves; the upper plate is provided with pin holes for positioning pins of step fixing pins.

The bottom plate of the base is provided with a U-shaped groove, which is used for installing and fixing on the working table of the drilling machine through bolt washers.

The vertical plate of the base is provided with a grooved plane, which is used for positioning bolts to tighten and limit; the center of the vertical plate is provided with a shaft installation hole, which is used for installing the shaft.

The material of the stepped drill sleeve is tool steel, and a drill sleeve through hole is arranged at the axis.

The circumference of the drilling mold is provided with three rows of forty-one positioning holes in the same relative position and relative angle as the holes on the circumference of the connecting flange.

The drilling mold is provided with a step outer circle, and a positioning groove is provided on the outer circumference of the step for installing a positioning block; the connecting flange is installed on the step outer circle of the drilling mold through the positioning block, and is attached to the bottom surface of the step; the step There is a circle of chip removal ring groove on the outer circumference, which is used to remove chips when connecting flanges to process holes on the circumference; there are seventeen arc-shaped notches on the outer circumference of the step, which are used to prevent Orifice burrs on its circumference scratch parts and tooling.

The distance between the positioning holes on the circumference of the drill template and the corresponding holes on the circumference of the connecting flange after positioning and installation is the same as the distance between the pin holes and the through holes of the drill sleeve.

A bushing installation hole is provided at the center of the drilling mold for interference installation of the copper bushing.

The end face of the drilling jig is provided with four uniformly distributed threaded holes a and four uniformly distributed threaded holes b.

The fixed backing plate is provided with four big-end waist-shaped ring grooves, and the big-ends are used to get out of the way of the bolt heads of the fixing bolts during installation.

A lightening hole is provided on the fixed backing plate for lightening and avoiding the positioning bolt and the textured handle.

The processing method of processing the hole on the circumference of the connecting flange by using the above fixture device:

Step 1, the processing device is installed and fixed on the working table of the drilling machine through the U-shaped groove on the bottom plate of the base with a bolt washer, and the through hole of the drill sleeve at the axis of the stepped drill sleeve is aligned;

Step 2, install the connecting flange on the outer circle of the step of the drilling mold through the positioning block, ensure that the hole on the circumference is in the same direction as the corresponding positioning hole on the circumference of the drilling mold, and press and fix it with a fixed backing plate and four fixing bolts on the bottom of the steps;

Step 3, insert the step fixing pin into the first row of initial positioning holes on the circumference of the drilling template through the pin hole of the upper plate of the base for positioning, screw the four positioning bolts into the threaded hole b on the drilling template, and tighten it on the base The upper limit of the groove of the vertical plate is limited, and the drilling mold is fixed with a mesh handle;

Step 4, the fitter uses the drill machine to process the hole on the circumference of the connecting flange through the through hole of the drill sleeve at the axis of the step drill sleeve through the drill bit;

Step 5: Loosen the textured handle, turn the drilling mold by hand, insert the step fixing pin into the next positioning hole in the first row on the circumference of the drilling mold, repeat steps 2, 3, 4, and 5 until the first row of holes Finished;

Step 6: The processing steps and principle of the second row of holes and the third hole are the same as those of the first row of holes. Repeat steps 2, 3, 4 and 5 until the processing of the second row of holes and the third hole is completed.

Beneficial technical effects: adopting the processing device and processing method described in the present invention, the holes on the product circumference can be drilled by a fitter drilling machine instead of the five-axis machine tool numerical control programming drilling process, and the dimensional accuracy of the holes on the circumference of the connecting flange processed at the same time, The relative position and relative angle are qualified, and the quality is stable, which greatly shortens the parts clamping, alignment, programming and processing time, greatly improves the processing efficiency of parts, and saves processing costs. The fixture device has simple structure and convenient operation, realizes reasonable and reliable positioning and clamping of parts, reduces the difficulty of operation for workers, and can meet the requirements of mass production.

Description of drawings

Figure 1 is a schematic diagram of the connecting flange structure;

Fig. 2 is the connecting flange processing device;

Fig. 3 is a schematic diagram of clamping of the processing device and the connecting flange of the present invention;

Figure 4 is a schematic diagram of the base structure;

Fig. 5 is a schematic diagram of the structure of the stepped drill sleeve;

Fig. 6 is a structural schematic diagram of a step fixing pin;

Fig. 7 is a schematic diagram of the drilling mold structure;

Fig. 8 is a schematic diagram of the copper bushing structure;

Fig. 9 is a structural schematic diagram of a positioning block;

Fig. 10 is a schematic diagram of the structure of the rotating shaft;

Figure 11 is a schematic diagram of the structure of the fixed backing plate;

Figure 12 is a schematic diagram of the structure of the fixing bolt;

Figure 13 is a schematic diagram of the positioning bolt structure;

Figure 14 is a schematic view of the structure of the handle;

Among them, 1-base, 2-step drill sleeve, 3-step fixing pin, 4-drilling mold, 5-copper bushing, 6-positioning block, 7-rotating shaft, 8-fixing backing plate, 9-fixing bolt, 10 - Positioning bolt, 11 - Mesh handle, 12 - Connecting flange, 13 - U-shaped groove, 14 - Step hole, 15 - Pin hole, 16 - Shaft installation hole, 17 - Groove plane, 18 - Through hole of drill sleeve , 19-positioning hole, 20-step outer circle, 21-step bottom surface, 22-positioning groove, 23-chip removal ring groove, 24-arc notch, 25-bushing installation hole, 26-threaded hole a, 27- Threaded hole b, 28-big end waist ring groove, 29-lightening hole.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to accompanying drawings 2-14, in which, Fig. 1 is a kind of hole processing device on the circumference of the inlet connecting flange specifically designed by the present invention, the device includes a base 1, a stepped drill sleeve 2, a stepped fixed pin 3, and a drilling mold 4, Copper bushing 5, positioning block 6, rotating shaft 7, fixed backing plate 8, fixing bolt 9, positioning bolt 10, textured handle 11; stepped drill bushing 2 is loaded into the stepped hole 14 of the upper plate of base 1 through interference fit; rotating shaft 7 is installed and fixed in the shaft installation hole 16 of the vertical plate of the base 1 through a nut washer; the copper bushing 5 is installed in the bushing installation hole 25 at the center of the drilling mold 4 through an interference fit; the positioning block 6 is installed and fixed by a cross-recessed countersunk head screw In the positioning groove 22 of the drilling mold 4; the drilling mold 4 is integrally installed on the rotating shaft 7 through the interference-fit copper bushing 5; the connecting flange 12 is installed on the step outer circle 20 of the drilling mold 4 through the positioning block 6; the fixing pad The plate 8 presses and fixes the connecting flange 12 on the bottom surface 21 of the step through the fixing bolt 9 and the threaded hole a26; the positioning bolt 10 is installed in the threaded hole b27 on the drilling template 4; the textured handle 11 is installed on the rotating shaft 7 through thread fit superior.

The bottom plate of the base 1 is provided with three U-shaped grooves 13, which are used to install and fix on the working table of the drilling machine through bolt washers.

The riser of the base 1 is provided with a groove plane 17 for tightening and limiting the positioning bolts 10 ; the center of the riser is provided with a shaft installation hole 16 for installing the shaft 7 .

The upper plate of the base 1 is provided with a step hole 14 for interference installation of the step drill sleeve 2; the upper plate is provided with a pin hole 15 for positioning the step fixing pin 3.

The material of the stepped drill sleeve 2 is tool steel, and a drill sleeve through hole 18 is arranged at its axis.

The circumference of the drilling template 4 is provided with three rows of forty-one positioning holes 19 with the same relative positions and relative angles to the holes on the circumference of the connecting flange 12 .

The drilling template 4 is provided with a step outer circle 20, and a positioning groove 22 is provided on the circumference of the step outer circle 20 for installing the positioning block 6; the connecting flange 12 is installed on the step outer circle 20 of the drilling template 4 through the positioning block 6 , and fit with the bottom surface 21 of the step; there is a ring of chip removal ring groove 23 on the outer circle of the step 20, which is used to remove chips when connecting the flange 12 to process the upper hole on the circle; there are seventeen arcs on the outer circle of the step 20 Shape notch 24 is used to prevent the orifice burrs on its circumference from scratching parts and frocks when taking off the connecting flange after processing.

The distance between the positioning holes 19 on the circumference of the drilling template 4 and the corresponding holes on the circumference of the connecting flange 12 after positioning and installation is the same as the distance between the pin holes 15 and the through holes 18 of the drill sleeve.

A bush installation hole 25 is provided at the center of the jig 4 for interference installation of the copper bush 5 .

The end face of the jig 4 is provided with four uniformly distributed threaded holes a26 and four uniformly distributed threaded holes b27.

The fixed backing plate 8 is provided with four big-end waist-shaped ring grooves 28, and the big-ends are used to get out of the way of the bolt heads of the fixing bolts 9 during installation.

A lightening hole is provided on the fixed backing plate 8, which is used to lighten and avoid the positioning bolt 10 and the textured handle 11.

The processing method of processing the hole on the circumference of the connecting flange by using the fixture device:

Step 1, the processing device is installed and fixed on the working table of the drilling machine through the U-shaped groove 13 on the bottom plate of the base 1 with a bolt washer, and the drill sleeve through hole 18 at the axis of the stepped drill sleeve 2 is aligned;

Step 2, install the connecting flange 12 on the step outer circle 20 of the drilling mold 4 through the positioning block 6, ensure that the holes on its circumference are in the same direction as the corresponding positioning holes 19 on the circumference of the drilling mold 4, and use the fixed backing plate 8 and Four fixing bolts 9 are compressed and fixed on the bottom surface 21 of the step;

Step 3, insert the step fixing pin 3 into the first row of initial positioning holes 19 on the circumference of the drilling template 4 through the pin hole 15 on the upper plate of the base 1 for positioning, and screw the four positioning bolts 10 into the threaded holes on the drilling template 4 In b27, tighten the upper limit of the base 1 riser groove plane 17, and fix the drill template 4 with the mesh handle 11;

Step 4, the fitter uses a drilling machine to process the drill bit through the through hole 18 of the drill sleeve at the axis of the step drill sleeve 2 (corresponding to the positioning hole 19 where the step fixing pin 3 is positioned) to connect the upper hole on the circumference of the flange 12;

Step 5, unclamp the textured handle 11, turn the drill mold 4 by hand, insert the step fixing pin 3 into the next positioning hole 19 of the first row on the circumference of the drill mold 4, repeat steps 2, 3, 4, and 5 until Finish the first row of holes;

Step 6: The processing steps and principle of the second row of holes and the third hole are the same as those of the first row of holes. Repeat steps 2, 3, 4 and 5 until the processing of the second row of holes and the third hole is completed.

The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. The parts that are not described in detail are regarded as conventional technical means or common knowledge in the field; those of ordinary skill in the art should understand that: based on this The design concept of the application should be able to make adaptive modifications to the technical solutions described in the foregoing embodiments, or to perform equivalent replacements for some or all of the technical features. The scope of the technical solution of the embodiment.

Claims (9)

1. A device for processing holes on the circumference of an air inlet connection flange, characterized in that it includes a base, a stepped drill sleeve, a stepped fixed pin, a drilling mold, a copper bush, a positioning block, a rotating shaft, a fixed backing plate, a fixed bolt, Positioning bolts, textured handles; step drill sleeves are installed into the step holes of the upper plate of the base through interference fit; the rotating shaft is installed and fixed in the shaft mounting holes of the vertical plate of the base through nuts and washers; copper bushings are installed into the center of the drilling mold through interference fit The positioning block is installed and fixed in the positioning groove of the drilling mold through the cross-recessed countersunk head screw; the drilling mold is integrally installed on the rotating shaft through the copper bushing with interference fit; the connecting flange is installed on the drilling mold through the positioning block On the outer circle of the step; the fixed backing plate presses and fixes the connecting flange on the bottom surface of the step through the fixing bolt and threaded hole a; the positioning bolt is installed in the threaded hole b on the drilling template; the textured handle is installed on the shaft through thread fit above; the upper plate of the base is provided with a step hole for interference installation of the step drill sleeve; the upper plate is provided with a pin hole for the positioning pin of the step fixing pin. 2 . The device for processing holes on the periphery of the inlet connecting flange according to claim 1 , wherein the bottom plate of the base is provided with a U-shaped groove for mounting and fixing on the working table of the drilling machine through bolt washers. 3 . 3. The device for processing holes on the circumference of the inlet connecting flange as claimed in claim 2, characterized in that, the vertical plate of the base is provided with a groove plane, which is used for positioning bolts to tighten and limit; the center of the vertical plate is provided with There are shaft mounting holes for installing the shaft. 4 . The device for processing holes on the circumference of the inlet connection flange according to claim 1 , wherein the circumference of the drilling jig is provided with positioning holes at the same relative position and angle as the holes on the circumference of the connection flange. 5 . 5. The device for processing holes on the circumference of the inlet connecting flange as claimed in claim 4, wherein the drilling mold is provided with a stepped outer circle, and a positioning groove is provided on the outer circumference of the step for installing a positioning block ;The connecting flange is installed on the outer circle of the step of the drilling mold through the positioning block, and fits the bottom surface of the step; there is a circle of chip removal ring groove on the outer circle of the step, which is used to remove chips when the upper hole of the connecting flange is processed; There is an arc-shaped notch on the outer circumference of the step, which is used to prevent the burr on the circumference of the hole from scratching the parts and the tooling when the connecting flange is removed after processing. 6. The device for machining holes on the circumference of the air inlet connection flange as claimed in claim 5, wherein the positioning holes on the circumference of the drilling mold and the hole distance and pins of the corresponding holes on the circumference of the connection flange are positioned and installed. The hole spacing is the same as that of the through hole of the drill sleeve. 7. The device for processing holes on the circumference of the air inlet connection flange as claimed in claim 6, wherein a bushing installation hole is provided at the center of the drilling mold for interference installation of copper bushings; the drill The end face of the mold is provided with four uniformly distributed threaded holes a and four uniformly distributed threaded holes b. 8. The device for processing holes on the circumference of the inlet connecting flange as claimed in claim 1, characterized in that, the fixed backing plate is provided with four large-end waist-shaped ring grooves, and the large-ends are used for installation. Open the bolt head of the fixing bolt. 9. A processing method utilizing the processing device according to any one of claims 1-8 to process holes on the circumference of the connecting flange, characterized in that the method comprises the following steps: Step 1, installing and fixing the processing device on the working table of the drilling machine through the U-shaped groove on the bottom plate of the base with a bolt washer, and aligning the through hole of the drill sleeve at the axis of the stepped drill sleeve; Step 2, install the connecting flange on the outer circle of the step of the drilling mold through the positioning block, ensure that the hole on the circumference is in the same direction as the corresponding positioning hole on the circumference of the drilling mold, and press and fix it with a fixed backing plate and four fixing bolts on the bottom of the steps; Step 3, insert the step fixing pin into the first row of initial positioning holes on the circumference of the drilling template through the pin hole of the upper plate of the base for positioning, screw the four positioning bolts into the threaded hole b on the drilling template, and tighten it on the base The upper limit of the groove of the vertical plate is limited, and the drilling mold is fixed with a mesh handle; Step 4, the fitter uses the drill machine to process the hole on the circumference of the connecting flange through the through hole of the drill sleeve at the axis of the step drill sleeve through the drill bit; Step 5: Loosen the textured handle, turn the drilling mold by hand, insert the step fixing pin into the next positioning hole in the first row on the circumference of the drilling mold, repeat steps 2, 3, 4, and 5 until the first row of holes Finished; Step 6: The processing steps and principle of the second row of holes and the third hole are the same as those of the first row of holes. Repeat steps 2, 3, 4 and 5 until the processing of the second row of holes and the third hole is completed.

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