CN104439355B - Chuck clamps and processing method may be reversed in a kind of union elbow - Google Patents

Abstract

The invention discloses a reversible chuck fixture for a right-angle pipe joint, which has a positioning base, and a chuck adjustment mechanism is arranged on the positioning base. The lead screw fixed on the base is installed on the lead screw and is located on both sides of the rolling screw seat and the driving sliders I and II are arranged oppositely, the clamping positioning block I is arranged on the driving slider I, and the positioning block I is arranged on the driving slider The clamping positioning block II on the block II, the clamping positioning block I and the clamping positioning block II are arranged oppositely, one side of the clamping positioning block I is provided with a positioning profile I, and the other side is connected with the driving slider I, and the mounting One side of the clip positioning block II is provided with a positioning profile II matched with the positioning profile I, and the other side is connected with the driving slider II. The chuck fixture simplifies the processing procedure of right-angle pipe joints and improves processing efficiency. It can not only ensure the stability and consistency of the processing quality of right-angle pipe joints, but also adapt to the production requirements of small batches and multiple specifications of parts.

Description

Reversible chuck fixture and processing method for right-angle pipe joint

technical field

The invention relates to the field of manufacturing or assembling aviation parts, in particular to a reversible chuck fixture and a processing method for a right-angle pipe joint.

Background technique

The pipe joint parts selected by the aircraft hydraulic system have a variety of structural forms, mainly including straight pipe joints, right-angle pipe joints, 120-degree elbow joints, three-way/four-way pipe joints, etc. Except for straight-through pipe joints, the raw materials of other pipe joints are supplied as die forgings. Aircraft use such parts with many specifications and small quantities, and the production cost is relatively high. When processing and using such die forgings, it is necessary to use a tooling fixture on the outer circle of the neck of the die forging for clamping and positioning. The existing tooling fixture is a two-jaw chuck type. Before clamping, it needs to be processed on the machine tool according to the size and angle of the part, such as boring, manual file repair, drilling and grinding, which has the defects of complicated process, long processing time and low efficiency. Due to the large tolerances of forging dimensions and angles of the neck of die forgings, and even the outer diameter of each neck of each die forging is different, the operator needs to correct the two jaws by means of file repair, drilling and grinding, and knocking every time a part is processed. The jaws of the disc are used to align the part machining center. After the jaws are filed and repaired, the machining center of the part must be aligned again when the part is clamped. This clamping method of machining parts takes up a lot of production and processing time, has low production efficiency, and affects the accuracy and life of the lead screw of the CNC machine tool spindle, which not only reduces the machining accuracy of the parts, but also affects the consistency of product quality.

Contents of the invention

The invention aims at the deficiencies of the prior art, and provides a reversible chuck fixture for right-angle pipe joints, which is composed of a positioning base and a chuck adjustment mechanism. The chuck adjustment mechanism is used to realize one-time clamping and positioning of products to ensure the The verticality, the positioning base is used to realize the mechanical connection mechanism between the chuck fixture and the CNC lathe. The right-angle pipe joint is positioned and clamped by controlling the clamping and positioning block through the driving slider arranged on the lead screw, and the rotation and positioning of the right-angle pipe joint are completed by adjusting the driving slider and the assembly bolts on the clamping and positioning block. The chuck fixture simplifies the processing procedure of right-angle pipe joints and improves processing efficiency. It can not only ensure the stability and consistency of the processing quality of right-angle pipe joints, but also adapt to the production requirements of small batches and multiple specifications of parts.

The technical scheme that the present invention adopts is:

A reversible chuck fixture for a right-angle pipe joint, which has a positioning base, and a chuck adjustment mechanism is arranged on the positioning base, and the chuck adjustment mechanism includes a base placed on the positioning base, fixed by a rolling screw The screw on the base is installed on the screw and is located on both sides of the rolling screw seat and oppositely arranged to drive sliders Ⅰ and Ⅱ. The clamping positioning block Ⅰ is set on the drive slider Ⅰ and is set on the drive slider Ⅱ. The clamping positioning block II on the top, the clamping positioning block I and the clamping positioning block II are set oppositely, one side of the clamping positioning block I is provided with a positioning profile I, and the other side is connected with the driving slider I, and the clamping positioning One side of the block II is provided with a positioning profile II matched with the positioning profile I, and the other side is connected with the driving slider II.

In the reversible chuck clamp for a right-angle pipe joint, the drive slider I is L-shaped, has a side wall I and a bottom wall I, the side wall I is provided with an assembly hole I, and the other part of the clamping positioning block I is One side is provided with an assembly bolt I that matches the assembly hole I, and the assembly bolt I passes through the assembly hole I to fix the clamping positioning block I on the side wall I through the lock nut I.

In the reversible chuck fixture for a right-angle pipe joint, the bottom wall I is provided with a screw driving hole I, and the driving slider I is sleeved on the screw through the screw driving hole I.

In the above-mentioned reversible chuck fixture for a right-angle pipe joint, the side of the side wall I where the clamping positioning block I is installed is provided with a verticality limiting block I.

In the above-mentioned reversible chuck fixture for a right-angle pipe joint, the driving slider II is L-shaped, has a side wall II and a bottom wall II, the side wall II is provided with an assembly hole II, and the other part of the clamping positioning block II is One side is provided with an assembly bolt II cooperating with the assembly hole II, and the assembly bolt II passes through the assembly hole II and fixes the clamping positioning block II on the side wall II through the lock nut II.

In the reversible chuck fixture for a right-angle pipe joint, the bottom wall II is provided with a screw driving hole II, and the driving slider II is sleeved on the screw through the screw driving hole II.

In the above-mentioned reversible chuck fixture for right-angle pipe joints, the side wall II where the clamping positioning block II is installed is provided with a verticality limiting block II.

In the above-mentioned reversible chuck fixture for a right-angle pipe joint, the base is provided with a guide groove consistent with the driving direction of the lead screw, and the lower ends of the driving slider I and the driving slider II are respectively provided with guide grooves to cooperate with the guide grooves. guide rail Ⅰ and guide rail Ⅱ.

A method for processing a right-angle pipe joint with a reversible chuck fixture, comprising the following steps:

1) Connect the reversible chuck fixture of the right-angle pipe joint with the spindle head of the CNC machine tool;

2) According to the neck size of the right-angle pipe joint, carry out boring repair on the positioning surface Ⅰ of the clamping positioning block Ⅰ and the positioning surface Ⅱ of the clamping positioning block II, and the clamping positioning block Ⅰ and the clamping positioning block II after boring repair Assemble to the drive slider Ⅰ and drive slider Ⅱ respectively, and fix and lock them with lock nuts Ⅰ and Ⅱ;

3) Adjust the driving slider Ⅰ and driving slider Ⅱ through the screw to make the positioning profile Ⅰ and positioning profile Ⅱ lock the right-angle pipe joint;

4) Select the intersection point of the centerlines of the two holes of the right-angle pipe joint as the origin of the processing program, and process the long end/short end of the right-angle pipe joint according to the processing steps of the right-angle pipe joint;

5) After the processing of the long end/short end of the right-angle pipe joint is completed, the clamping positioning block I, the right-angled pipe joint and the clamping positioning block II are rotated 90° as a whole by adjusting the screw and lock nuts I and II. Lock the lead screw, lock nuts I and II, and process the short end/long end of the right-angle pipe joint according to the processing steps of the right-angle pipe joint.

The invention has the following beneficial effects:

A reversible chuck fixture for right-angle pipe joints created by the present invention can realize one-time clamping and positioning, which can not only ensure the machining center of the clamped parts, but also effectively control the verticality tolerance of the right-angle pipe joints. It has the advantages of reversibility, fast processing, Less operating procedures, high precision and other advantages.

It not only reduces the impact of manual operation on product processing, removes manual repairing, drilling and grinding and other processing procedures, but also ensures the consistency of product quality.

The invention can complete the processing and manufacturing of right-angle pipe joints of different specifications, shorten the processing time, improve the processing efficiency, and reduce the production cost of the right-angle pipe joints.

Description of drawings

Fig. 1 is a structural schematic diagram of a reversible chuck fixture for a right-angle pipe joint created by the present invention.

FIG. 2 is a schematic structural diagram of the chuck adjustment mechanism shown in FIG. 1 .

Fig. 3 is a schematic diagram of part of the structure shown in Fig. 2 with the base removed.

Fig. 4 is a schematic diagram of the driving slider I shown in Fig. 1 .

FIG. 5 is a schematic diagram of the driving slider II shown in FIG. 1 .

Fig. 6 is a schematic diagram of clamping positioning block I shown in Fig. 1 .

Fig. 7 is a schematic diagram of the clamping positioning block II shown in Fig. 1 .

Figure 8 is a schematic diagram of a right-angle pipe joint.

Among them, 1-positioning base, 2-base, 3-rolling screw seat, 4-driving slider Ⅰ, 41-side wall Ⅰ, 42-bottom wall Ⅰ, 43-assembly hole Ⅰ, 44-screw driving hole Ⅰ, 45-guide rail Ⅰ, 46-perpendicularity limit block Ⅰ, 5-drive slider Ⅱ, 51-side wall Ⅱ, 52-bottom wall Ⅱ, 53-assembly hole Ⅱ, 54-screw drive hole Ⅱ , 55-Guide slide rail Ⅱ, 56-Perpendicularity limit block Ⅱ, 6-Clamping positioning block Ⅰ, 61-Positioning surface Ⅰ, 62-Assembling bolt Ⅰ, 63-Lock nut Ⅰ, 7-Clamping and positioning Block Ⅱ, 71-positioning surface Ⅱ, 72-assembly bolt Ⅱ, 73-lock nut Ⅱ, 8-lead screw, 9-guide groove, 10-right angle pipe joint, 101-long end of right angle pipe joint, 102- The short end of the right-angle pipe joint, the neck of the 103-right-angle pipe joint.

detailed description

As shown in Figure 1-7, a reversible chuck fixture for right-angle pipe joints is used for positioning and processing of aircraft system parts. It has a positioning base 1. mechanical connection mechanism. The positioning base 1 is provided with a chuck adjustment mechanism, which is used for one-time clamping and positioning of the right-angle pipe joint 10 to ensure the verticality of the right-angle pipe joint 10 . As shown in Figure 2-7, the chuck adjustment mechanism includes a base 2 placed on the positioning base 1, a screw 8 fixed on the base 2 through a rolling screw seat 3, installed on the screw 8 and positioned on the rolling screw The driving sliders I4 and II5 arranged opposite to each other on both sides of the seat 3 can be positioned and locked by adjusting the rolling screw 8 to realize the positioning and locking of the driving sliders I4 and II5. The clamping positioning block I6 is provided on the driving slider I4, the clamping positioning block II7 is provided on the driving slider II5, the clamping positioning block I6 is set opposite to the clamping positioning block II7, and one side of the clamping positioning block I6 is provided with The other side of the positioning profile I61 is connected with the driving slider I4, and one side of the clamping positioning block II7 is provided with a positioning profile II71 matching the positioning profile I61, and the other side is connected with the driving slider II5. As shown in Figure 1-2, the right-angle pipe joint 10 is positioned and clamped through the cooperation of the positioning profile I61 of the clamping positioning block I6 and the positioning profile II71 of the clamping positioning block II7 which are symmetrical on both sides.

As shown in Figure 4, the drive slider I4 is L-shaped, with a side wall I41 and a bottom wall I42, the side wall I41 is provided with an assembly hole I43, and the other side of the clamping positioning block I6 is provided with a The assembly bolt I62 matched with the assembly hole I43, the assembly bolt I62 passes through the assembly hole I43 and fixes the clamping positioning block I6 on the side wall I41 through the lock nut I63, which is convenient for locking and rotating the clamping positioning block I6. The side of the side wall I41 where the clamping positioning block I6 is installed is provided with a verticality limit block I46, which precisely controls the rotation of the clamping positioning block I6 by 90°. The bottom wall I42 is provided with a lead screw driving hole I44, and the driving slider I4 is sleeved on the lead screw 8 through the lead screw driving hole I44.

As shown in Figure 5, the driving slider II5 is L-shaped, with a side wall II51 and a bottom wall II52, the side wall II51 is provided with an assembly hole II53, and the other side of the clamping positioning block II7 is provided with a The assembly bolt II72 matched with the assembly hole II53, the assembly bolt II72 passes through the assembly hole II53 and fixes the clamping positioning block II7 on the side wall II51 through the lock nut II73, which is convenient for locking and rotating the clamping positioning block II7. The side of the side wall II51 where the clamping positioning block II7 is installed is provided with a verticality limiting block II56. Precisely control the rotation of clamping positioning block Ⅱ7 by 90°. The bottom wall II52 is provided with a screw driving hole II54, and the driving slider II5 is sleeved on the screw 8 through the screw driving hole II54.

Preferably, the base 2 is provided with a guide groove 9 which is consistent with the driving direction of the lead screw 8, and the lower ends of the driving slider I4 and the driving slider II5 are respectively provided with a guide rail I45 and a guide rail which cooperate with the guide groove 9 II 55.

A method for processing a right-angle pipe joint 10 using a reversible chuck fixture for a right-angle pipe joint. As shown in FIG. The neck 103 of the connector. The specific processing steps are as follows:

1) Connect the reversible chuck fixture of the right-angle pipe joint with the spindle head of the CNC machine tool through the positioning base 1;

2) According to the size of the neck 103 of the right-angle pipe joint, carry out boring repair on the positioning profile I61 of the clamping positioning block I6 and the positioning profile II71 of the clamping positioning block II7, and the clamping positioning block I6 and the clamping positioning block after boring repair Ⅱ7 is respectively assembled to the driving slider Ⅰ4 and the driving slider Ⅱ5, and fixed and locked with lock nuts Ⅰ63 and Ⅱ73;

3) Adjust the driving slider I4 and the driving slider II5 through the screw 8, so that the driving slider I4 and the driving slider II5 respectively drive the positioning profile I61 and the positioning profile II71 to lock the right-angle pipe joint 10;

4) Select the intersection point of the centerlines of the two holes of the right angle pipe joint 10 as the origin of the processing program, according to the processing steps of the long end 101 of the right angle pipe joint (turning end face, turning outer circle, turning thread base circle, turning undercut, drilling, expanding hole, car 74° surface, car thread, remove sharp edge) to process the long end 101 of the right-angle pipe joint;

5) After the long end 101 of the right-angle pipe joint is finished, by adjusting the screw 8, the lock nuts I63 and II73, the clamping positioning block I6, the right-angled pipe joint 10 and the clamping positioning block II7 are rotated 90° as a whole ( Rotate 90° to achieve positioning control through the verticality limit block set on the driving slider), lock the lead screw 8, lock nuts I63 and II73, according to the processing steps of the short end 102 of the right-angle pipe joint (turning end face, turning Outer circle, threading base circle, drilling, reaming, turning 74° surface, threading, removing sharp edges) to process the short end 102 of the right-angle pipe joint, and finally complete the processing of the overall part size of the right-angle pipe joint 10.

Claims (9)

1. A method for processing a reversible chuck fixture using a right-angle pipe joint, characterized in that it comprises the steps: 1) Connect the reversible chuck fixture of the right-angle pipe joint with the spindle head of the CNC machine tool; 2) According to the size of the neck (103) of the right-angle pipe joint, carry out boring repair on the positioning surface I (61) of the clamping positioning block I (6) and the positioning profile II (71) of the clamping positioning block II (7), and put The clamping positioning block I (6) and clamping positioning block II (7) after boring and repairing are respectively assembled on the driving slider I (4) and the driving slider II (5), and the locking nut I (63) and Ⅱ(73) fix and lock it; 3) Adjust the driving slider I (4) and the driving slider II (5) through the screw (8), so that the positioning profile I (61) and the positioning profile II (71) lock the right-angle pipe joint (10); 4) Select the intersection point of the centerlines of the two holes of the right-angle pipe joint (10) as the origin of the processing program, and process the long end (101)/short end (102) of the right-angle pipe joint (10) according to the processing steps of the right-angle pipe joint (10); 5) After the long end (101)/short end (102) of the right-angle pipe joint is processed, adjust the screw (8), lock nuts I (63) and II (73), and clamp the positioning block I (6 ), the right-angle pipe joint (10) and the clamping positioning block II (7) rotate 90° as a whole, then lock the screw (8), lock nuts I (63) and II (73), according to the right-angle pipe joint ( The processing step of 10) processes the short end (102)/long end (101) of the right angle pipe joint. 2. The method according to claim 1, characterized in that, the reversible chuck fixture of the right-angle pipe joint has a positioning base (1), and a chuck adjustment mechanism is provided on the positioning base (1), and the The chuck adjustment mechanism includes a base (2) placed on the positioning base (1), a lead screw (8) affixed to the base (2) through a rolling screw seat (3), installed on the lead screw (8) The drive sliders I (4) and II (5) located on both sides of the rolling screw seat (3) and oppositely arranged, the clamping positioning block I (6) set on the drive slider I (4), set on The clamping positioning block II (7) on the drive slider II (5), the clamping positioning block I (6) is set opposite to the clamping positioning block II (7), and one side of the clamping positioning block I (6) is set There is a positioning profile Ⅰ (61), the other side is connected with the drive slider Ⅰ (4), and one side of the clamping positioning block Ⅱ (7) is provided with a positioning profile Ⅱ that matches the positioning profile Ⅰ (61) (71), the other side is connected with driving slider II (5). 3. The method according to claim 2, characterized in that the drive slider I (4) is L-shaped, has a side wall I (41) and a bottom wall I (42), and on the side wall I (41) There is an assembly hole I (43), and the other side of the clamping positioning block I (6) is provided with an assembly bolt I (62) that matches the assembly hole I (43), and the assembly bolt I (62) passes through the assembly hole I (43) Fix the clamping positioning block I (6) on the side wall I (41) through the lock nut I (63). 4. The method according to claim 3, characterized in that, the bottom wall I (42) is provided with a screw driving hole I (44), and the driving slider I (4) passes through the screw driving hole I (44) is sleeved on the leading screw (8). 5. The method according to claim 3, characterized in that, the side wall I (41) on which the clamping positioning block I (6) is installed is provided with a verticality limiting block I (46). 6. The method according to claim 2, characterized in that, the driving slider II (5) is L-shaped, has a side wall II (51) and a bottom wall II (52), and on the side wall II (51) There is an assembly hole II (53), and the other side of the clamping positioning block II (7) is provided with an assembly bolt II (72) that matches the assembly hole II (53), and the assembly bolt II (72) passes through the assembly hole II (53) Fix the clamping positioning block II (7) on the side wall II (51) through the lock nut II (73). 7. The method according to claim 6, characterized in that, the bottom wall II (52) is provided with a screw driving hole II (54), and the driving slider II (5) passes through the screw driving hole II (54) is sleeved on the leading screw (8). 8. The method according to claim 6, characterized in that, the side wall II (51) on which the clamping positioning block II (7) is installed is provided with a verticality limiting block II (56). 9. The method according to any one of claims 2-8, characterized in that, the base (2) is provided with a guide groove (9) consistent with the driving direction of the lead screw (8), and the driving slider I (4) and the lower end of the drive slider II (5) are respectively provided with a guide rail I (45) and a guide rail II (55) cooperating with the guide groove (9).