CN113146385A

CN113146385A - Shaft equal division circumference axial grinding processing aligning mechanism

Info

Publication number: CN113146385A
Application number: CN202110478282.6A
Authority: CN
Inventors: 卢丽俊; 吴强洪
Original assignee: Hangzhou Yongjun Machine Tools Co ltd
Current assignee: Hangzhou Yongjun Machine Tools Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-23

Abstract

The invention discloses a shaft-class halving circumference axial grinding and machining aligning mechanism which is characterized by comprising a workbench, wherein an index plate is arranged on the workbench, and the aligning mechanism is coaxially connected with the index plate; and the aligning mechanism is internally provided with a cross coupling. Through the design of the automatic aligning mechanism, the installation steps of the circumference equal division processing of the large-scale shaft workpiece are simplified, the larger coaxiality error or error uncertainty caused by clamping of a single index plate is reduced, and the circumference equal division precision and the working efficiency are improved.

Description

Shaft equal division circumference axial grinding processing aligning mechanism

Technical Field

The invention relates to a shaft machining technology, in particular to a shaft equal division circumferential axial grinding and processing aligning mechanism.

Background

For the processing of the small-weight-class shaft circumference equal-division tooth socket, hole and the like, the positioning is basically carried out by adopting a centering chuck or a mode of adding a middle support or a tail seat thimble, for example, the patent publication number is CN103095064A, a motor rotor embedded slot circumference equal-division processing method divides the center line of an embedded slot on a marking flat plate; placing the electronic rotor on a bearing seat of a grooving machine; connecting the head of the grooving machine to one end of a motor rotor, and connecting the other end of the motor rotor to a measuring head of a rotating angle device; the slotting machine processes the slot in sequence, after each slot is processed, the motor rotor is rotated, the rotation angle displayed by the display of the rotation angle device is observed, and the rotation is stopped after the preset rotation angle is reached; after each rotation, the scribed bisector was checked with a scribe needle. For example, patent publication No. CN202129468U, a circumference equant hole processing device, which comprises a base, a three-jaw self-centering chuck, a bearing, and an index plate, wherein the index plate is fixed on the base through the bearing, the index plate is connected with the three-jaw self-centering chuck, and when the index plate rotates to a certain equant groove, the index mechanism is locked by a locking rod and a locking sleeve. For large shaft workpieces, such as corrugated rolls for papermaking with a diameter of more than 0.5 m, a length of more than 2 m and a weight of more than 2 tons, the tailstock needle top cannot be positioned, and the workpiece is difficult to be ensured to be concentric by the central line of the workpiece shaft and the central line of the index plate by directly clamping the workpiece by the index plate, so that the adjustment difficulty is high, the accuracy is difficult to ensure, a large machining error is caused, and waste reporting sometimes occurs.

Disclosure of Invention

The invention aims to solve the problems and provides a centering mechanism for axial grinding machining of a circumference of a shaft equal division, which has the characteristics of automatic fine adjustment processing capability of concentricity of a workpiece and an index plate, simplified installation steps of circumference equal division operation of a large-scale shaft workpiece, reliable stability and the like.

The technical problem of the invention is mainly solved by the following technical scheme: a shaft-class halving circumference axial grinding and machining aligning mechanism is characterized by comprising a workbench, wherein an index plate is arranged on the workbench, and the aligning mechanism is coaxially connected with the index plate; and the aligning mechanism is internally provided with a cross coupling.

In the centering mechanism for axial grinding of the shaft equally-divided circumference, preferably, the centering mechanism comprises a connecting seat matched with the index plate and a chuck for clamping and fixing a workpiece, and the cross coupling is arranged between the connecting seat and the chuck.

Preferably, in the aligning mechanism for axial grinding of the shaft equally-divided circumference, the oldham coupling is provided with a cross-shaped connector and a chuck connector which are matched with each other, and a cross roller guide rail is arranged at a matching part of the cross-shaped connector and the chuck connector.

In the centering mechanism for axial grinding of the shaft-like halving circumference, preferably, a centering sleeve is arranged outside the circumference of the oldham coupling.

In the shaft type equally-divided circumference axial grinding aligning mechanism, preferably, the centering sleeve is provided with an inner hole section matched with the connecting seat, and a first sealing ring is arranged between the centering sleeve and the connecting seat.

In the aligning mechanism for the axial equant circumferential and axial grinding machining of the shaft, preferably, the workbench is further provided with a headstock and a tailstock, the headstock and the tailstock are respectively provided with a V-shaped groove matched with the workpiece, and a wear pad is arranged in the V-shaped groove.

In the centering mechanism for axial grinding machining of the shaft equally-divided circumference, preferably, the index plate is of an index head chuck structure; the chuck is a pneumatic chuck.

In the foregoing aligning mechanism for axial grinding of equally divided circumferences of shafts, preferably, the workbench is provided with a slide rail, and the headstock and the tailstock are arranged on the slide rail.

In the foregoing centering mechanism for axial grinding of equally divided circumferences of shafts, preferably, the headstock and the tailstock are provided with a height adjusting mechanism.

The technical scheme is that tooling design is carried out aiming at the process of machining equal division circumferences on a grinding machine for shafts which are long in length, heavy in weight and not easy to move and calibrate, the principle that a conventional dividing disc can equally divide the circumferences is utilized, the defects of centering and coaxiality caused by the fact that the dividing disc clamps a workpiece are avoided, and a centering mechanism with a built-in cross coupling is designed between the shaft workpiece and the dividing disc. The cross coupling can make two shafts which are not on the same axis or have larger angle of folding or larger axial movement reach constant angular speed continuous rotation, and reliably transmit torque and movement. Therefore, even if the indexing disc and the workpiece shaft have coaxiality errors, the indexing disc can ensure that the equant data of the indexing disc is transmitted to the workpiece to be machined in an equiangular speed mode.

However, the requirement of coaxiality in the length direction of the workpiece shaft cannot be met only by the cross coupling, and particularly for processing an equally-divided long groove on the circumferential surface of the shaft, such as a corrugated roller and the like, the dead weight of the shaft cannot be supported by both an dividing disc and the cross coupling, so that the scheme designs a headstock and a tailstock with an automatic centering V-shaped groove, the headstock and the tailstock are fixed on a grinding machine workbench in a positioning mode of a sucking disc, the tailstock is supported by using bearing blocks with coaxiality requirements at two ends of the processed shaft, and the workpiece and the butt joint end of the cross coupling are concentric under the condition that the central line of the workpiece is kept in a horizontal state.

Furthermore, in order to avoid the cross coupling self-adjusting eccentricity from being too large, the centering sleeve positioned outside the circumference of the cross coupling is designed, the centering sleeve continues to be connected with the connecting seat matched with the dividing disc, and the correct position of the centering sleeve at the torque transmission part is ensured, so that the cross connecting body and the chuck connecting body which are mutually matched are restrained by the degree of freedom. Meanwhile, the centering sleeve is provided with a sealing ring to prevent oil and water from entering the transmission mechanism. In addition, the adjustment margin of the crossed roller guide rail is relatively small in precision machining, generally within 10mm, and the centering sleeve limits the stroke of the crossed roller guide rail.

Furthermore, cross roller guide rails are arranged at the matching parts of the cross connector and the chuck connector, so that the cross roller guide rails can bear loads in all directions, and high-precision and stable linear motion is realized; the rolling friction force is small, the stability is good, the contact area is large, and the elastic deformation is small; the internal crossed rollers have more effective moving bodies, and high-rigidity and high-load movement is easy to realize; and the mechanical energy consumption is small, the adjustment speed is high, and the bearing capacity is also large. The requirement of free adjustment of the concentricity of the large-weight shaft workpiece and the index plate is completely met, and the flexibility and the automatic centering effect of the Oldham's coupling are greatly improved.

In addition, the slide rail of the workbench can provide different positions of the headstock and the tailstock for requirements, and the machining of shaft workpieces with different lengths is met. The use of a pneumatic chuck also simplifies the installation procedure.

Compared with the prior art, the invention has the beneficial effects that: through the design of the automatic aligning mechanism, the installation steps of the circumference equal division processing of the large-scale shaft workpiece are simplified, the larger coaxiality error or error uncertainty caused by clamping of a single index plate is reduced, and the circumference equal division precision and the working efficiency are improved.

Drawings

Fig. 1 is a schematic structural diagram of an operating state of the present invention.

Fig. 2 is a schematic structural diagram of a dividing plate and a centering mechanism of the invention.

Fig. 3 is a front view of fig. 2.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a partially enlarged structural view of the oldham ring in fig. 2.

In the figure: 1. the automatic centering device comprises a workbench, 2 parts of an index plate, 3 parts of a centering mechanism, 301 parts of a connecting seat, 302 parts of a cross roller guide rail, 303 parts of a chuck, 304 parts of a second sealing ring, 305 parts of a first sealing ring, 306 parts of a cross connecting body, 307 parts of a chuck connecting body, 308 parts of a centering sleeve, 309 parts of a gland, 4 parts of a head frame, 5 parts of a tail frame, 6 parts of a workpiece and 7 parts of a sliding rail.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Referring to fig. 1, in the centering mechanism for axial-equally-divided circumferential axial grinding processing according to the embodiment, a workpiece 6 is a corrugated roller, equally-divided corrugated grooves need to be processed along the circumferential surface in a large-diameter area in the middle of the corrugated roller, and bearing stops which are coaxially arranged are respectively arranged at small-diameter sections at two ends, and the weight of each bearing stop is 2.5 tons.

A grinding machine workbench 1 is used as an installation reference, an index plate 2 is arranged at one end of the workbench 1, the index plate 2 is a dividing head chuck and is provided with an installation chuck, and a centering mechanism 3 is coaxially connected with the index plate, as shown in figure 2.

As shown in fig. 3 to 5, the aligning mechanism 3 includes a connecting base 301 engaged with the index plate 2, an air chuck 303 for clamping and fixing the workpiece 6, and an oldham coupling provided between the connecting base 301 and the air chuck 303. The cross coupling comprises a cross connecting body 306 and a chuck connecting body 307 which are mutually matched, and the cross roller guide rails 302 are arranged at the matching parts of the cross connecting body 306 and the chuck connecting body 307.

The outer portion of the circumference of the Oldham coupling is further provided with a centering sleeve 308, the centering sleeve 308 is provided with an inner hole section matched with the connecting seat 301, the end portion of the centering sleeve is provided with a nut hole, the outer circle of the connecting seat 301 is provided with a shaft shoulder, and the centering sleeve 308 is axially positioned through the shaft shoulder and is fixed by screws. A first sealing ring 305 is arranged at the matching part between the centering sleeve 308 and the connecting seat 301. The other end of the centering sleeve 308 extends to the connecting point of the chuck connecting body 307 and the chuck 303, and a pressing cover 309 is arranged on the outer side (i.e. the side facing the chuck 303) of the centering sleeve 308, and an inner hole of the pressing cover 309 covers the connecting seam of the chuck connecting body 307 and the chuck 303. Second sealing rings 304 are arranged between the inner hole of the centering sleeve 308 and the chuck connecting body 307 and between the gland 309 and the chuck connecting body 307.

A sliding rail 7 is arranged on the workbench 1 along the axial direction of the workpiece 6, the sliding rail 7 is divided into two sections and is respectively used for installing the headstock 4 and the tailstock 5, the headstock 4 and the tailstock 5 are respectively provided with a V-shaped groove matched with the workpiece 6, the V-shaped grooves are naturally positioned, and wear pads are arranged at the contact parts of the two sides in the V-shaped grooves and the workpiece 6.

The headstock 4 and the tailstock 5 are internally provided with a height adjusting mechanism which consists of a lead screw and an adjusting nut which are vertically arranged and is provided with height scale dimension marks.

When the centering mechanism is applied, for example, a corrugated roller groove on a corrugated roller of a workpiece 6 is machined, the index plate 2 is installed on the grinding machine workbench 1, the centering mechanism 3 is fixed on the index plate 2, then the two sliding rails 7 are installed in the coaxial direction of the index plate 2, the headstock 4 and the tailstock 5 are well positioned, in the batch production process, the parts fixed in the steps do not need to be installed again and are used as standard references, and the distance between the headstock 4 and the tailstock 5 is determined according to the distance between two bearing gears of the specific workpiece 6.

Corrugated roller groove workpieces 6 which need to be ground and are arranged in a circumferential equal division mode are placed on a headstock 4 and a tailstock 5 which are adjusted in height, a shaft head at one end of each workpiece 6 is placed at the position of a pneumatic chuck 303 and is clamped by the pneumatic chuck 303, the headstock 4 and the tailstock 5 are fixed or corrugated roller grooves are ground, and when one corrugated roller groove workpiece is ground, the scales set by a rotary dividing disc 2 are used for processing the next corrugated roller groove.

The above embodiments are illustrative of the present invention, and any simple modified structure, method, process, etc. of the present invention are within the scope of the present invention.

Claims

1. A shaft-class halving circumference axial grinding and machining aligning mechanism is characterized by comprising a workbench (1), wherein an index plate (2) is arranged on the workbench, and an aligning mechanism (3) is coaxially connected with the index plate; and the aligning mechanism is internally provided with a cross coupling.

2. The centering mechanism for shaft type bisection circumference axial grinding machining according to claim 1, wherein the centering mechanism (3) comprises a connecting seat (301) matched with the index plate (2), a chuck (303) used for clamping and fixing the workpiece (6), and the Oldham's coupling is arranged between the connecting seat and the chuck.

3. The shaft type bisection circumference axial grinding processing centering mechanism as claimed in claim 1, wherein the oldham coupling is provided with a cross connecting body (306) and a chuck connecting body (307) which are mutually matched, and the matching part of the cross connecting body and the chuck connecting body is provided with a cross roller guide rail (302).

4. The shaft type halving circumference axial grinding aligning mechanism according to claim 2, wherein the cross coupling is provided with a centering sleeve (308) at the outer circumference.

5. The shaft type halving circumference axial grinding centering mechanism according to claim 4, wherein the centering sleeve (308) has an inner hole section matched with the connecting seat (301), and a first sealing ring (305) is arranged between the centering sleeve and the connecting seat.

6. The shaft type equally-dividing circumferential and axial grinding and aligning mechanism according to claim 1, wherein the workbench (1) is further provided with a headstock (4) and a tailstock (5), the headstock and the tailstock are respectively provided with a V-shaped groove matched with the workpiece (6), and a wear pad is arranged in the V-shaped groove.

7. The shaft type halving circumference axial grinding processing aligning mechanism of claim 1, wherein the index plate (2) is in an index head chuck structure; the chuck (303) is a pneumatic chuck.

8. The center adjusting mechanism for axial grinding of shaft equally-divided circumferences according to claim 6, wherein the workbench (1) is provided with a slide rail (7), and the headstock (4) and the tailstock (5) are arranged on the slide rail.

9. The centering mechanism for axial grinding of shaft equally-divided circumferences according to claim 6, wherein the headstock (4) and the tailstock (5) are provided with height adjusting mechanisms.