CN115156935A

CN115156935A - Outer barrel inner hole boring clamp and using method thereof

Info

Publication number: CN115156935A
Application number: CN202210801212.4A
Authority: CN
Inventors: 王爱玲; 刘林书; 魏茹
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-10-11

Abstract

The invention belongs to the technical field of positioning fixtures, and provides an outer barrel inner hole boring fixture and a using method thereof. The outer barrel boring inner hole clamp comprises a main body, a disc, a flange plate and a pressing plate; the part locating hole inserts circular round pin and the rhombus round pin in the main part respectively, and urceolus boring hole anchor clamps adopt two hole location, utilize two hinge clamp plates and a ordinary flat clamp plate to press from both sides tightly, not only can be perfect avoid the position of three filler neck, more enable each position homoenergetic that the part presss from both sides tight plane and receive the clamp force, ensure that the location presss from both sides tight accuracy, stable in structure is convenient for improve machining efficiency. The invention utilizes the hinge pressure plate and the movable joint bolt to compress the part, so that the pressure plate is always connected with the main body, and the pressure block matched with the pressure plate can accurately press the central position of the plane of the part, thereby not only effectively ensuring the reliable compression of the part, but also avoiding the loss caused by too many scattered clamp elements.

Description

Outer barrel inner hole boring clamp and using method thereof

Technical Field

The invention relates to the technical field of positioning fixtures, in particular to an outer barrel inner hole boring fixture and a using method thereof.

Background

The outer cylinder part is shown in figure 2 and is a common hydraulic structural part in the field of aviation, the outer cylinder part is mainly applied to lock components of the landing gear and plays a crucial role in taking on and putting down the landing gear, and the inner hole of the outer cylinder part is filled with hydraulic pressure, so that the hole has high requirements on dimensional accuracy and position accuracy and extremely high requirements on sealing performance. Meanwhile, the inner hole in the center of the part is long and irregular in structure, the appearance of the part is provided with the boss, the groove and the three filler necks, and the selection of a clamping mode is more important during processing. The original clamp of the part has the following problems in trial processing: 1. the outer circle of the part is only used for positioning, but the length of the outer circle is shorter and deviates to one end, and the size of the other end is inclined when the outer circle is clamped, so that the error is larger; 2. adopt round pin axle to withstand two upper and lower notches, nevertheless the round pin axle is thin, and the clamp force is not enough, can't realize tight effect tightly, so this special fixture can't satisfy the processing needs, can only utilize at present to assemble the processing of carrying out the part, can not guarantee the stability of size, can consume a large amount of turnover and preparation time again. The production progress and the product quality of workshop sections are seriously influenced by the problems, and a better tool clamp needs to be found to solve urgently.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the clamp developed aiming at the boring of the outer barrel part can be used for machining a slender inner hole of the part. The fixture has the outstanding characteristics that the size of a part is large, the fixture is unreliable in positioning and clamping, two holes are used for positioning, two hinge pressing plates and a flat pressing plate are used for clamping, the positions of three filler necks can be perfectly avoided, each part of a clamping plane of the part can be clamped by clamping force, the positioning and clamping accuracy is ensured, the structure is stable, and the machining efficiency is convenient to improve.

The technical scheme of the invention is as follows: an outer cylinder inner hole boring clamp comprises a main body 3, a disc 4, a flange plate 5 and a pressing plate;

the main body 3 is in an L-shaped plate shape and is divided into a vertical section and a horizontal section; the round pin 1 and the diamond pin 2 are respectively arranged on the vertical section of the main body 3, and the positions of the round pin and the diamond pin correspond to the positions of two positioning holes 20 in the fixture; one end of the vertical section of the main body 3 is provided with a notch, and the other end is provided with no notch; the horizontal section of the main body 3 is fixed on one side of the disc 4 through a cylindrical pin 13 and a screw 15, and a balancing weight 9 is arranged on the other side of the disc 4 and used for ensuring the stability of the installation of the clamp; the disc 4 is in threaded connection with the flange plate 5, and the disc and the flange plate are connected with a machine tool through a positioning bolt 8 and a common nut 14;

the pressing plate comprises a hinge pressing plate 6, a semicircular pressing plate 7 and a common flat pressing plate 10; the two hinge pressing plates 6 and the common flat pressing plate 10 are arranged in parallel, the positions of the three pressing plates are not in contact with the filler neck of the part, and the three pressing plates are matched with the main body 3 to fix the part; the semicircular pressing plates 7 are fixed at the contact surfaces of the hinge pressing plates 6 and parts, and the coincident mounting holes of the two semicircular pressing plates 7 are fixed through cylindrical pins 13.

Two swing bolts 11 are respectively installed at the non-groove end of the vertical section of the main body 3, one end of each swing bolt 11 is fixed through a thin nut 12, the other end of each swing bolt 11 penetrates through an installation hole of the hinge pressing plate 6, and a cylindrical pin 13 is inserted from a through hole in the side face of the hinge pressing plate 6 and used for fixing the swing bolts 11 and the hinge pressing plate 6; two eyelet bolts 11 are respectively arranged in grooves with groove port ends in the vertical section of the main body 3, mounting holes are arranged on the side surface in each groove, one end of each eyelet bolt 11 is fixed through a cylindrical pin 13, and the other end of each eyelet bolt 11 is fixedly pressed by a nut 16 with a shoulder after penetrating through the hinge pressing plate 6; one end of the common flat pressing plate 10 is fixedly supported by a common bolt 17 with a thin nut 12, and the other end is provided with a through hole; one end of the stud 18 is fixed on the main body 3 through the thin nut 12, and the other end is fixed by the nut 16 with a shoulder after passing through the through hole of the common flat pressing plate 10.

A use method of an outer barrel inner bore boring clamp comprises the following specific steps:

when the part outer cylinder 19 is installed, the nut 16 with the shoulder is unscrewed, and the two hinge pressing plates 6 and the common flat pressing plate 10 are moved away;

the part positioning holes 20 are respectively inserted into the round pin 1 and the diamond pin 2, and the bottom surface of the part is adjusted and adjusted to be attached to the plane of the main body 3 by rotating the common bolt 17;

after the two hinge pressing plates 6 and the common flat pressing plate 10 are pressed on the parts, the shoulder nuts 16 are screwed down, and the positioning and clamping of the parts are realized.

The invention has the beneficial effects that: 1. and two holes are adopted for positioning, so that the positioning size is more accurate, stable and reliable, and the quality of the product is favorably improved. 2. The hinge pressing plate and the swing bolt are used for compressing the part, so that the pressing plate is always connected with the main body, and the pressing block matched with the pressing plate can accurately press the central position of the plane of the part, thereby effectively ensuring the reliable compression of the part and avoiding the loss caused by excessive scattered clamp elements; 3. the clamp is convenient to manufacture and can be used for a long time, so that the economy is realized; 4. the clamp is compact in structure, convenient to carry and use and capable of meeting the requirements of part machining precision and production progress.

Drawings

FIG. 1 (a) is a front view of an outer cylinder boring inner hole clamp;

FIG. 1 (b) is a side view of an outer cylinder boring inner hole clamp;

FIG. 2 is a view showing a structure of a part;

FIG. 3 (a) is a perspective view of the outer cylinder part;

FIG. 3 (b) is a front view of the outer cylinder part;

FIG. 3 (c) is a side view showing the fitting of the outer cylinder;

FIG. 4 (a) is a side view of a clamp hold-down structure;

FIG. 4 (b) isbase:Sub>A sectional view A-A of the pressing structure of the jig, and b isbase:Sub>A side view.

In the figure: 1. a circular pin; 2. a diamond pin; 3. a main body; 4. a disc; 5. a flange plate; 6. a hinge pressing plate; 7. a semicircular pressing plate; 8. positioning a bolt; 9. a counterweight block; 10. a common flat pressing plate; 11. an eye bolt; 12. a thin nut; 13. a cylindrical pin; 14. a common nut; 15. a screw; 16. a shoulder nut; 17. a common bolt; 18. a stud; 19. an outer cylinder; 20. and (7) positioning the holes.

Detailed Description

The mounting and using method of the clamp comprises the following steps:

step 1, mounting a round pin 1 and a diamond pin 1 on a main body 3;

step 2.2, the swing bolts 11 are respectively installed on one side without the slot on the

main body

3, 2 thin nuts 12 are respectively screwed on for fixation, the other ends of the swing bolts 11 are aligned to the installation holes of the 2 hinge

pressing plates

6, and 2 cylindrical pins 13 are respectively inserted into the side through holes of the hinge pressing plates 6;

step 3.2, 2 semicircular pressing plates 7 are arranged at the positions where the hinge pressing plates 6 are contacted with the surfaces of the parts, and 2 cylindrical pins 13 are inserted into the superposed holes of the 2 semicircular pressing plates 7 for fixation;

step 4.2, installing the swing bolts 11 in two grooves of the main body 3, inserting 2 cylindrical pins 13 into superposed holes of the two grooves, and then installing the swing bolts, wherein 2 shouldered nuts 16 are matched for compressing the hinge pressure plate 6;

step 5, screwing the thin nut 12 on the common bolt 17, and installing the common bolt 17 with the thin nut 12 in a hole corresponding to the excircle part of the part on the clamp main body 3; which is installed at one end of a common flat pressing plate 10;

step 6, mounting a stud 18 in a hole beside a common bolt 17, screwing a thin nut 12 at one end of the stud 18 to be fixed on the clamp body, penetrating a common flat pressing plate 10 at the other end of the stud 18, and fixing the stud with a nut 16 with a shoulder;

7.3, fixing the disc 4 on the flange plate 5 by using the double-end studs 18;

step 8, installing 4 positioning bolts 8 on the flange plate 5, screwing 4 common nuts 14 respectively, and realizing connection with a machine tool through the structure;

step 9, fixing the mounted clamp main body assembly on the disc 4 through 8

screws

15 and 2 cylindrical pins 13;

step 10, because the whole structure of the clamp deflects to one side of the disc, in order to ensure the stability of the installation of the clamp, 2 screws 15 are used on the disc, and 5 balancing weights 9 are installed on the other side of the disc 4;

step 11, when a part of the outer cylinder 19 is installed, unscrewing 3 nuts 16 with shoulders, moving 2 hinge pressing plates 6 and a common flat pressing plate 10 away, inserting part positioning holes 20 into the circular pin 1 and the diamond pin 2, adjusting the bottom surface of the part to be attached to the plane of the main body 3 by using common bolts 17 corresponding to the outer circular surface of the part, pressing the 2 hinge pressing plates 6 and the common flat pressing plate 10, and screwing the 3 nuts 16 with shoulders respectively to realize the positioning and clamping of the part, wherein the drawing is shown in fig. 4;

step 12, after the parts are installed, boring the parts;

and step 13, after the processing is finished, screwing off 3 nuts 16 with shoulders, and removing 2 hinge pressing plates 6 and the common flat pressing plate 10 to finish the disassembly of the parts.

By utilizing two-hole positioning, the structure is very stable, and a large amount of preparation time and turnover time consumed by adopting an assembling clamp are saved. By the aid of the positioning machining mode, machining accuracy required by drawings and consistency of size states of parts in each batch can be guaranteed, operation is convenient, positioning is reliable, the hinge pressing plates 6 and the eye bolts 11 are adopted, elements are connected to the clamp main body, clamping is stable, loss of the elements can be avoided, production efficiency of the whole clamp is greatly improved, and a large amount of production cost is saved.

Claims

1. The outer cylinder inner hole boring clamp is characterized by comprising a main body (3), a disc (4), a flange plate (5) and a pressing plate;

the main body (3) is in an L-shaped plate shape and is divided into a vertical section and a horizontal section; the round pin (1) and the diamond pin (2) are respectively arranged on the vertical section of the main body (3), and the positions of the round pin and the diamond pin correspond to the positions of two positioning holes (20) of a part in the clamp; one end of the vertical section of the main body (3) is provided with a notch, and the other end of the vertical section is not provided with a notch; the horizontal section of the main body (3) is fixed on one side of the disc (4) through a cylindrical pin (13) and a screw (15), and a balancing weight (9) is installed on the other side of the disc (4) and used for ensuring the stability of installation of the clamp; the disc (4) is in threaded connection with the flange plate (5), and the disc and the flange plate are connected with a machine tool through a positioning bolt (8) and a common nut (14);

the pressing plate comprises a hinge pressing plate (6), a semicircular pressing plate (7) and a common flat pressing plate (10); the two hinge pressing plates (6) and the common flat pressing plate (10) are arranged in parallel, are not in contact with the pipe connecting nozzle of the part and are matched with the main body (3) to fix the part; the semicircular pressing plates (7) are fixed at the contact surfaces of the hinge pressing plates (6) and the parts, and the coincident mounting holes of the two semicircular pressing plates (7) are fixed through cylindrical pins (13).

2. The outer cylinder boring inner hole clamp is characterized in that two swing bolts (11) are respectively installed at the non-groove ends of the vertical section of the main body (3), one ends of the swing bolts (11) are fixed through thin nuts (12), the other ends of the swing bolts penetrate through installation holes of the hinge pressing plate (6), and cylindrical pins (13) are inserted from side through holes of the hinge pressing plate (6) and used for fixing the swing bolts (11) and the hinge pressing plate (6); two swing bolts (11) are respectively arranged in grooves with groove port ends in the vertical section of the main body (3), mounting holes are formed in the side faces in the grooves, one ends of the swing bolts (11) are fixed through cylindrical pins (13), and the other ends of the swing bolts (11) are fixedly pressed by shoulder nuts (16) after penetrating through the hinge pressing plate (6); one end of the common flat pressing plate (10) is fixedly supported by a common bolt (17) with a thin nut (12), and the other end is provided with a through hole; one end of the double-end stud (18) is fixed on the main body (3) through a thin nut (12), and the other end of the double-end stud is fixed by a nut (16) with a shoulder after passing through a through hole of the common flat pressing plate (10).

3. The use method of the outer barrel inner hole boring clamp is characterized by comprising the following specific steps:

when the part outer cylinder (19) is installed, the nut (16) with the shoulder is unscrewed, and the two hinge pressing plates (6) and the common flat pressing plate (10) are moved away;

the part positioning holes (20) are respectively inserted into the round pin (1) and the diamond pin (2), and the bottom surface of the part is adjusted and adjusted to be attached to the plane of the main body (3) by rotating the common bolt (17);

after the two hinge pressing plates (6) and the common flat pressing plate (10) are pressed on the part, the shoulder nut (16) is screwed down, and the positioning and clamping of the part are realized.