CN108907838A - A kind of Thin-wall Revolving Part Self adapting fixture - Google Patents

Abstract

The invention relates to an adaptive fixture for parts of a thin-walled revolving body, which mainly includes a base, a sleeve, a main shaft, and a support plate. On the outside of the base, the main shaft is placed in the middle of the base and the bottom plate. The sleeve is matched with the main shaft. The cylindrical pins are placed and connected by screws, the upper connecting block is matched with the threaded end of the main shaft, the lower connecting block is matched with the threaded end of the sleeve, the small ends of the upper bracket and the lower bracket are connected with the cylindrical pins, and the big end and the supporting plate are connected by bolts Connection, the bottom of the support plate is equipped with rollers, and the overall fixture is fixed to the machine tool through the U-shaped groove on the edge of the base and the bottom plate. The invention can realize the clamping of revolving body parts with different shapes, and has the characteristics of stability, reliability, convenience and quickness.

Description

An Adaptive Fixture for Thin-walled Revolving Parts

technical field

The invention relates to a jig for processing a revolving body, in particular to an adaptive jig for parts of a thin-walled revolving body.

Background technique

Thin-walled rotary parts are usually used in aerospace and aviation fields, such as rocket shells and aero-engine casings. The shapes of revolutions involved include cylindrical and conical, as well as stepped forms. Such parts use high-temperature alloys, which are characterized by high processing difficulty and high precision requirements. At the same time, the surface of the thin-walled rotary part is the surface to be processed, which is not suitable for clamping and fixing, which greatly restricts the selection of the clamping position of the part. When processing thin-walled rotary parts, it is necessary to use corresponding fixtures for clamping, and complete the processing of different features of the wall under the action of the tool of the five-axis machining center. However, different fixtures are used for different types of parts, which will greatly increase the processing cost, and will cause waste if not used after processing. Therefore, according to the characteristics and processing characteristics of thin-walled rotary parts, it is very necessary to design a fixture that can meet different shapes of rotary parts and clamp reliably.

Contents of the invention

The purpose of the invention is to solve the above problems, and propose an adaptive fixture for thin-walled revolving body parts to realize reliable clamping of different types of parts.

The purpose of the present invention is achieved through the following technical solutions: an adaptive fixture for thin-walled rotary parts, mainly including a base, a sleeve, a main shaft, and a support plate. Adjusting bolts and adjusting screws are evenly distributed on the outside of the base, the main shaft is placed in the middle of the base and the bottom plate, the sleeve is matched with the main shaft, the main shaft gear and the sleeve gear are respectively connected with the main shaft and the sleeve through a flat key, the main shaft gear is connected with the bottom plate and the sleeve gear There are tapered roller bearings between the base and the base, thrust bearings are placed between the boss of the sleeve and the boss of the main shaft, cylindrical pins are placed between the upper end cover and the upper connecting block, and between the lower end cover and the lower connecting block, and They are all connected by screws, the upper connecting block and the middle of the lower connecting block are threaded, the upper connecting block is matched with the threaded end of the main shaft, the lower connecting block is matched with the threaded end of the sleeve, the small ends of the upper bracket and the lower bracket are connected with cylindrical pins, The big end is connected to the support plate by bolts, the bottom of the support plate is equipped with rollers, and is connected to the shock absorber by screws, and the overall clamp is fixed to the machine tool through the U-shaped groove on the edge of the base and the bottom plate.

There are six grooves on the edge of the upper end cover, upper connecting block, lower end cover and lower connecting block, and six arc grooves on the surface, and cylindrical pins are placed inside the arc grooves.

The back of the support plate is provided with multiple pairs of lifting lugs, which are respectively connected to the upper bracket, the lower bracket and the rollers.

The surface of the shock absorbing block is intermittently provided with chip removal grooves, and the bottom is provided with square grooves.

The outer side of the base is uniformly provided with an adjustment hole, a positioning hole, and a settling platform. The upper end of the adjustment hole communicates with the surface of the base. The adjustment screw passes through the through groove in the middle of the pressure plate and is threadedly connected with the pull block; a track groove is opened in the middle of the surface of the base, and the rollers cooperate with the track groove.

One end of the pull block is a pull ring, and the other end is a cylindrical block, and the cylinder surface of the cylindrical block is provided with a threaded hole.

A cylindrical hole is opened at one end of the pressing plate, and a through groove is opened in the middle.

Beneficial effects of the present invention:

1. By rotating the main shaft and the sleeve, the upper bracket and the lower bracket are driven to perform telescopic movement, realizing the self-adaptive adjustment of the radial distance and inclination angle of the baffle on the base. At the same time, the damping block can be disassembled and replaced from the baffle, so as to be suitable for special types of thin-walled rotary parts.

2. The damping block is made of rubber material, which has a good support and shock absorption effect on thin-walled parts; the surface of the shock absorbing block is intermittently provided with chip removal grooves, which is conducive to drilling processing; the bottom of the baffle is equipped with rollers, which can reduce The telescopic resistance is beneficial to the adjustment of the position of the shock absorber.

3. One end of the pressure plate is connected to the adjustment bolt, and the adjustment screw cooperates with the pull block to realize the adjustment of the rotation angle and height; it meets the bottom edge compression requirements of thin-walled rotary parts with different diameters and heights, and the operation is convenient and quick.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the assembly of an adaptive fixture for a thin-walled revolving body part;

Fig. 2 is a schematic diagram of clamping a workpiece by an adaptive fixture for a thin-walled rotary part;

Figure 3 is a full cross-sectional view of the assembly of the adaptive fixture for thin-walled rotary parts;

Fig. 4 is the three-dimensional schematic diagram of main shaft and sleeve;

Fig. 5 is a three-dimensional schematic diagram of the cooperation of the fixture support adjustment part;

Fig. 6 is a three-dimensional schematic diagram of a support plate and a shock absorber;

Figure 7 is a perspective view of the base;

Fig. 8 is a three-dimensional schematic diagram of the cooperation of the clamping adjustment part of the jig;

In the figure: 1-shock absorbing block; 2-base; 3-workpiece; 4-bottom plate; 5-roller; 6-tapered roller bearing; 7-flat key; 8-main shaft gear; 9-thrust bearing; 10- Sleeve gear; 11-pull block; 12-pressure plate; 13-adjusting bolt; 14-adjusting screw; 15-lower bracket; 16-sleeve; 17-main shaft; 18-upper bracket; 19-support plate; Cover; 21-upper connection block; 22-lower connection block; 23-lower end cover; 24-sleeve boss; 25-spindle boss; 26-cylindrical pin; 27-arc groove; 28-square groove; 29- Chip flute; 30-adjusting hole; 31-positioning hole; 32-settling table; 33-U-shaped groove; 34-track groove.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figure 1-5, an adaptive fixture for thin-walled rotary parts mainly includes a base 2, a sleeve 16, a main shaft 17, and a support plate 19, and is characterized in that: the base 2 and the bottom plate 4 are connected by screws, and 11. The pressure plate 12, the adjusting bolt 13, and the adjusting screw 4 are evenly distributed on the outside of the base 2, the main shaft 17 is placed in the middle of the base 2 and the bottom plate 4, the sleeve 16 cooperates with the main shaft 17, the main shaft gear 8 and the sleeve gear 10 pass through the flat key 7 They are respectively connected to the main shaft 17 and the sleeve 16, the tapered roller bearing 6 is arranged between the main shaft gear 8 and the bottom plate 4, the sleeve gear 10 and the base 2, and the thrust bearing 9 is placed on the sleeve boss 24 and the main shaft boss 25, between the upper end cover 20 and the upper connection block 21, the lower end cover 23 and the lower connection block 22, there are cylindrical pins 26, and they are all connected by screws, and the middle parts of the upper connection block 21 and the lower connection block 22 are threaded , the upper connecting block 21 cooperates with the threaded end of the main shaft 17, the lower connecting block 22 cooperates with the threaded end of the sleeve 16, the small ends of the upper support 18 and the lower support 15 are connected with the cylindrical pin 26, and the large ends are connected with the supporting plate 19 by bolts, Roller 5 is equipped with on the bottom of support plate 19, and is connected with damping block 1 by screw, and clamp whole is fixed with machine tool by base 2 and base plate 4 edge U-shaped groove 33.

As shown in Figure 5, the upper end cover 20, the upper connecting block 21, the lower end cover 23, and the lower connecting block 22 are provided with six grooves on the edge, and the surface is provided with six arc grooves 27, and the cylindrical pin 26 is placed in the arc groove 27. internal.

As shown in FIG. 6 , multiple pairs of lifting lugs are provided on the back of the support plate 19 , which are respectively connected to the upper bracket 18 , the lower bracket 15 and the roller 5 .

As shown in FIG. 6 , chip removal grooves 29 are intermittently formed on the surface of the shock absorbing block 1 , and square grooves 28 are formed at the bottom.

As shown in Figure 7, the outside of the base 2 is evenly provided with an adjustment hole 30, a positioning hole 31, and a settling platform 32. Placed in the positioning hole 31, the upper end is matched with the round hole at the end of the pressure plate 12, the adjustment screw 13 passes through the through groove in the middle of the pressure plate 12 and is threadedly connected with the pull block 11; 34 fits.

As shown in FIG. 8 , one end of the pull block 11 is a pull ring, and the other end is a cylindrical block, and a threaded hole is provided on the cylinder surface of the cylindrical block.

As shown in FIG. 8 , a cylindrical hole is opened at one end of the pressing plate 12 , and a through groove is opened in the middle.

Specific examples:

Assemble the fixture as shown in Figure 1, and install the entire fixture device vertically on the base of the five-axis vertical machining center; the main shaft gear 8 and the sleeve gear 10 are connected to the power input device; the main shaft is driven by the power input device The gear 8 and the sleeve gear 10 rotate, and each gear transmits power to the main shaft 17 and the sleeve 16; under the action of the track groove 34 on the surface of the base 2 and the gravity of the supporting part, the upper connecting block 21 and the lower connecting block 22 are respectively on the main shaft. 17 and the sleeve 16 to move up and down, thereby realizing the telescopic function of the upper bracket 18 and the lower bracket 15, adjusting the position and inclination angle of the shock absorber 1, so as to support the workpiece 3 adaptively; shrink the shock absorber 1 to Put the workpiece 3 into the proper position from top to bottom; adjust the damping block 1 to fit the workpiece 3, and judge the fit between the shock absorbing block 1 and the workpiece 3 through the system to identify the torque value at the input end; when entering the light In the state of high degree of lamination, the position of the pressure plate 12 is comprehensively adjusted by the pull block 11, the adjustment bolt 13, and the adjustment screw 14 to realize the clamping effect on the workpiece 3; After the processing operation is completed, first adjust the shock absorber 1 to separate from the workpiece 3, then release the bottom clamping device, and finally take out the workpiece 3; in the whole process of clamping and adjustment, in order to ensure the stability of the supporting part of the device, the upper The bracket 18 needs to maintain an acute angle with the upper end of the main shaft 17, and the lower bracket 15 needs to maintain an acute angle with the lower end of the main shaft 17, as shown in the schematic diagram of Figure 1; The location is as close as possible and meets the requirements.

Claims (7)

1. a kind of Thin-wall Revolving Part Self adapting fixture mainly includes pedestal (2), sleeve (16), main shaft (17), support plate (19), it is characterised in that：Pedestal (2) is connected by screw to bottom plate (4), pulling block (11), pressing plate (12), adjust bolt (13), It adjusts screw (4) to be evenly arranged on the outside of pedestal (2), main shaft (17) is placed in the middle part of pedestal (2) and bottom plate (4), sleeve (16) and main shaft (17) cooperate, mainshaft gear (8) and sleeve gear (10) are connected with main shaft (17) and sleeve (16) respectively by flat key (7), main Tapered roller bearing (6), thrust bearing are provided between shaft gear (8) and bottom plate (4), sleeve gear (10) and pedestal (2) (9) it is placed between sleeve boss (24) and main shaft boss (25), upper end cover (20) and upper link block (21), lower cover (23) are under It is placed with straight pin (26) between link block (22), and is connected by screw to, upper link block (21) and lower connecting block (22) Middle part offers screw thread, and upper link block (21) and main shaft (17) end of thread cooperate, lower connecting block (22) and sleeve (16) screw thread The small end of end cooperation, upper bracket (18) and lower bracket (15) is connect with straight pin (26), and big end and support plate (19) pass through bolt Connection, support plate (19) bottom are equipped with idler wheel (5), and are connect by screw with damping block (1), and fixture is entirely through pedestal (2) It is fixed with bottom plate (4) edge U-type groove (33) with lathe.

2. a kind of Thin-wall Revolving Part Self adapting fixture according to claim 1, it is characterised in that：Upper end cover (20), There are six groove, surface opens up that there are six arc grooves for upper link block (21), lower cover (23), lower connecting block (22) edge (27), it is internal to be placed in arc groove (27) for straight pin (26).

3. a kind of Thin-wall Revolving Part Self adapting fixture according to claim 1, it is characterised in that：Support plate (19) back Portion is provided with multipair lifting lug, is separately connected upper bracket (18), lower bracket (15) and idler wheel (5).

4. a kind of Thin-wall Revolving Part Self adapting fixture according to claim 1, it is characterised in that：Damping block (1) table Face is separated to be equipped with chip space (29), and bottom offers square groove (28).

5. a kind of Thin-wall Revolving Part Self adapting fixture according to claim 1, it is characterised in that：On the outside of pedestal (2) It is uniformly provided with adjustment hole (30), location hole (31), sedimentation platform (32), adjustment hole (30) upper end and pedestal (2) surface connection, is drawn Block (11) is placed in adjustment hole (30), is adjusted bolt (13) lower end and is placed in location hole (31), upper end and pressing plate (12) end circle Hole cooperation adjusts screw (14) and passes through through slot in the middle part of pressing plate (12) and be connected through a screw thread with pulling block (11)；In the middle part of susceptor surface It offers track groove (34), idler wheel (5) and track groove (34) cooperate.

6. a kind of Thin-wall Revolving Part Self adapting fixture according to claim 1, it is characterised in that：Pulling block (11) one end For pull ring, the other end is cylindrical piece, and cylindrical piece cylinder offers threaded hole.

7. a kind of Thin-wall Revolving Part Self adapting fixture according to claim 1, it is characterised in that：Pressing plate (12) one end Cylindrical hole is offered, middle part offers through slot.