CN216681608U

CN216681608U - Crankshaft flange end arc polishing tool

Info

Publication number: CN216681608U
Application number: CN202123159444.4U
Authority: CN
Inventors: 黄中顺; 毛晓峰; 胡忠健; 黄江海
Original assignee: Guilin Fuda Crankshaft Co ltd
Current assignee: Guilin Fuda Crankshaft Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-07
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a crankshaft flange end arc polishing tool which comprises a stepped shaft, an inlet groove, an outlet groove, a polishing area, a profiling hole, a through hole and an abrasive belt, wherein the stepped shaft is arranged on the inner side of the stepped shaft; the stepped shaft is divided into a large shaft and a small shaft; a profiling hole is formed in the middle of the large shaft; the small shaft is provided with a through hole which is communicated with the profiling hole; the part of the contour hole corresponding to the arc of the flange end of the crankshaft is a polishing area; an inlet groove and an outlet groove are respectively arranged at the two ends of the polishing area; the abrasive belt is arranged on the polishing area. The polishing device has the advantages of simple structure and convenience in manufacturing and use, and can reduce errors generated in the polishing process and reduce the labor intensity of workers.

Description

Crankshaft flange end arc polishing tool

Technical Field

The utility model relates to the field of flange machining tools, in particular to a crankshaft flange end arc polishing tool.

Background

The crankshaft is a core part of an engine, the technical requirement is high in the machining process, and the detail requirement of each part is high besides the requirement of size precision; adopt the inclined plane to pass through between crankshaft flange end excircle and the terminal surface, meet department at inclined plane and excircle, require for the circular arc transition, have the requirement of transition arc angle to this region simultaneously, present crankshaft flange end processing technology mainly has two kinds:

1. when the arc machining process of the flange end of the crankshaft is finished, the whole arc transition region is machined by a lathe, meanwhile, allowance for subsequent grinding machining is reserved on the outer circle and the end face, and when the arc transition region is finished in a fine grinding process, only the outer circle and the end face are ground without grinding machining;

2. when the arc machining process of the flange end of the crankshaft is finished, finish turning is directly carried out according to the finished product structure, machining allowances are reserved in the outer circle, the end face and the whole arc transition region, and during the subsequent finish grinding process, a profiling grinding wheel is adopted to grind the outer circle, the end face and the arc transition region;

in the former process, because the machining amount of the grinding wheel is different from the reserved amount during grinding, sharp corners can be left, and meanwhile, the roughness of the inclined surface cannot be improved. In the latter process, because the crankshaft is deformed in the axial direction in the machining process, the elongation of each part is inconsistent, the machining amount of each part of the profile surface repaired by the grinding wheel is different, the abrasion loss of the grinding wheel is different, and a sharp corner at the transition part is generated after machining.

If the roughness of the inclined plane does not reach the standard or the phenomenon of transition sharp angle is not processed, the problem occurs when the engine is assembled later; the oil blanket of engine can be held by the flange and is passed through extrusion suit to the flange excircle, because the oil blanket is plastic material, if when with rough surface or closed angle extrusion contact, lead to the oil blanket to damage easily, lead to engine later stage oil impregnate.

In the prior art, a rough inclined surface or a sharp corner at a transition part formed after the crankshaft flange end is machined is generally improved by adopting polishing operation, but the problems of large machining error, time and labor waste in machining and high technical requirement on operators easily occur in the polishing machining of the region in the machining process.

Disclosure of Invention

Aiming at the defects, the utility model provides the crankshaft flange end arc polishing tool which is simple in structure, convenient to use, small in machining error and capable of greatly reducing the operation difficulty.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a crankshaft flange end arc polishing tool comprises a stepped shaft, an inlet groove, an outlet groove, a polishing area, a profiling hole, a through hole and an abrasive belt; the stepped shaft is divided into a large shaft and a small shaft; the middle of the large shaft is provided with a profiling hole; the small shaft is provided with a through hole which is communicated with the profiling hole; the part of the contour hole corresponding to the arc of the flange end of the crankshaft is a polishing area; an inlet groove and an outlet groove are respectively arranged at the two ends of the polishing area; the abrasive belt is arranged on the polishing area.

The shape of the profiling hole is consistent with that of a crankshaft flange end to be processed.

As a further technical improvement, the number of the inlet grooves is the same as that of the outlet grooves, and one inlet groove corresponds to one outlet groove, and the inlet grooves and the outlet grooves are in a vertical relation. After the positions of the inlet groove and the outlet groove are determined, the position of the abrasive belt in the tool can be determined, and errors caused by polishing operation due to displacement can be avoided during use.

As a further technical improvement, four inlet tanks and four outlet tanks are respectively arranged. The abrasive belt polishing machine is provided with the inlet grooves and the outlet grooves, so that more abrasive belts can be placed, and the abrasive belt polishing machine can improve the working efficiency and the precision of polishing operation.

As a further technical improvement, the inlet grooves are uniformly distributed on the shaft body of the large shaft in the circumferential direction; the outlet grooves are circumferentially and uniformly distributed on the end face of the connecting end of the large shaft and the small shaft. The inlet groove and the outlet groove are circumferentially and uniformly distributed, so that the polishing is uniform and sufficient when the polishing machine is used.

As a further technical improvement, all the hole diameters of the profiling holes are 4-6mm larger than the outer diameter of the flange end of the crankshaft. The abrasive belt can conveniently penetrate into the profiling hole, and the relative movement between the polishing tool and the crankshaft flange can be ensured to be smoothly carried out when the polishing tool is used.

As a further technical improvement, the shaft body of the small shaft is provided with a threaded hole. When the tool is used, the rotating equipment is connected with the through hole in the small shaft, and then the screw is connected with the rotating equipment through the threaded hole, so that the connection between the rotating equipment and the tool is further enhanced, and the use safety is improved.

When in use, the method has two modes, namely a first mode: fixing the end of the crankshaft which does not need to be polished, penetrating an abrasive belt into the inlet groove, enabling the surface of the abrasive belt used for polishing to face the inside of the profiling hole, and then penetrating the abrasive belt out of the outlet groove; then, sleeving a profiling hole of a large shaft of the stepped shaft of the tool into a flange end of the crankshaft to be polished, connecting a handheld motor with a through hole in the small shaft of the stepped shaft, opening the handheld motor after connection is finished, rotating the handheld motor to drive the tool to rotate, fixing the crankshaft in place, and polishing sharp corners on the flange end of the crankshaft after the handheld motor operates for a period of time; if a plurality of crankshafts need to be machined, the machined crankshafts are detached and replaced by the unmachined crankshafts, and then the next polishing machining can be carried out.

The second mode is as follows: the crankshaft is arranged on a rotatable device, a lathe is taken as an example, one end, which does not need to be polished, of the crankshaft is fixed on a three-jaw chuck of the lathe, an abrasive belt penetrates through an inlet groove, one surface, which is used for polishing, of the abrasive belt faces towards the inside of the contour hole, and then the abrasive belt penetrates out of an outlet groove; then, sleeving a profiling hole of a large shaft of the stepped shaft of the tool into a flange end of the crankshaft to be polished, fixedly connecting a lathe tip with a through hole in the small shaft of the stepped shaft, starting the lathe, enabling the tool to be static at the moment, and driving the crankshaft to rotate by the lathe to polish a sharp corner on the flange end of the crankshaft; if a plurality of crankshafts need to be machined, the machined crankshafts are detached and replaced by the unmachined crankshafts, and then the next polishing machining can be carried out.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. the utility model has simple structure, convenient operation and small processing error, can realize rapid processing when large batch of crankshaft flange end arcs are processed, and can greatly improve the operating efficiency.

2. The threaded hole is formed in the small shaft, so that stable connection between a tool and the rotating device can be further guaranteed, and the safety during operation is improved.

3. The abrasive belt polishing device is provided with the inlet grooves and the outlet grooves, so that a plurality of abrasive belts can be placed in the abrasive belt polishing device during use, the time required by polishing can be shortened, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic front view of a crankshaft flange end circular arc polishing tool according to the present invention.

FIG. 2 is a schematic perspective view of a crankshaft flange end circular arc polishing tool without an abrasive belt.

FIG. 3 is a schematic view of a crankshaft flange end circular arc polishing tool of the present invention in use.

FIG. 4 is a schematic illustration of a sharp corner of a crankshaft flange end that has not been polished after facing.

The attached drawings are as follows:

a stepped shaft-1, a large shaft-2, a small shaft-3, an inlet groove-4, an outlet groove-5, a polishing area-6, a profiling hole-7, a through hole-8, an abrasive belt-9, a threaded hole-10 and a sharp corner-11.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Example 1:

a crankshaft flange end arc polishing tool comprises a stepped shaft 1, an inlet groove 4, an outlet groove 5, a polishing area 6, a profiling hole 7, a through hole 8 and an abrasive belt 9; the stepped shaft 1 is divided into a large shaft 2 and a small shaft 3; the middle of the large shaft 2 is provided with a profiling hole 7; the small shaft 3 is provided with a through hole 8, and the through hole 8 is communicated with the profiling hole 7; the part of the contour hole 7 corresponding to the arc of the flange end of the crankshaft is a polishing area 6; an inlet groove 4 and an outlet groove 5 are respectively arranged at two ends of the polishing area 6; the abrasive belt 9 is arranged on the polishing zone.

The shape of the contour hole 7 is consistent with that of the crankshaft flange end to be processed.

When in use, the method has two modes, namely a first mode: fixing the end of the crankshaft which does not need to be polished, penetrating an abrasive belt 9 from the inlet slot 4, enabling the surface, used for polishing, of the abrasive belt 9 to face the inside of the contour hole 7, and then penetrating the abrasive belt 9 out of the outlet slot 5; then, a copying hole 7 of a large shaft 2 of a stepped shaft 1 of the tool is sleeved into a flange end of a crankshaft to be polished, then a handheld motor is connected with a through hole 8 in a small shaft 3 of the stepped shaft 1, the handheld motor is turned on after connection is finished, the handheld motor rotates to drive the tool to rotate, the crankshaft is fixed in place, and polishing operation is carried out on a sharp corner 11 on the flange end of the crankshaft after the handheld motor operates for a period of time; if a plurality of crankshafts need to be machined, the machined crankshafts are detached and replaced by the unmachined crankshafts, and then the next polishing machining can be carried out.

The second mode is as follows: the crankshaft is arranged on a rotatable device, a lathe is taken as an example, one end, which does not need to be polished, of the crankshaft is fixed on a three-jaw chuck of the lathe, an abrasive belt 9 is inserted into the inlet groove 4, one surface, which is used for polishing, of the abrasive belt 9 faces the inside of the contour hole 7, and then the abrasive belt 9 penetrates out of the outlet groove 5; then, sheathing a profiling hole 7 of a large shaft 2 of a tool stepped shaft 1 into a crankshaft flange end to be polished, fixedly connecting a lathe tip with a through hole 8 in a small shaft 3 of the stepped shaft 1, starting the lathe, enabling the tool to be static at the moment, and driving a crankshaft to rotate by the lathe to polish a sharp corner 11 on the crankshaft flange end; if a plurality of crankshafts need to be machined, the machined crankshafts are detached and replaced by the unmachined crankshafts, and then the next polishing machining can be carried out.

Example 2:

the difference from the embodiment 1 is that the number of the inlet grooves 4 is the same as that of the outlet grooves 5, and one inlet groove 4 corresponds to one outlet groove 5 in a vertical relationship. The inlet channel 4 and the outlet channel 5 are positioned to ensure that the sanding belt 9 is positioned in the tool without displacement and errors in the polishing operation.

Four inlet tanks 4 and four outlet tanks 5 are respectively arranged. The arrangement of a plurality of inlet grooves 4 and outlet grooves 5 allows more abrasive belts 9 to be put in, which can improve the working efficiency and the precision of the polishing work.

The inlet grooves 4 are uniformly distributed on the shaft body of the large shaft 2 in the circumferential direction; the outlet grooves 5 are circumferentially and uniformly distributed on the end face of the connecting end of the large shaft 2 and the small shaft 3. The inlet groove 4 and the outlet groove 5 are circumferentially and uniformly distributed, so that the polishing is uniform and sufficient when the polishing machine is used.

All the hole diameters of the profile modeling holes 7 are 4-6mm larger than the outer diameter of the flange end of the crankshaft. The abrasive belt 9 can conveniently penetrate into the profiling hole 7, and the relative movement of the polishing tool and the crankshaft flange can be ensured to be smoothly carried out in use.

The shaft body of the small shaft 3 is provided with a threaded hole 10. When the tool is used, the rotating equipment is connected with the through hole 8 in the small shaft 3, and then the screw is connected with the rotating equipment through the threaded hole 10, so that the connection between the rotating equipment and the tool is further enhanced, and the use safety is improved.

The working principle of this embodiment is the same as embodiment 1.

Claims

1. The utility model provides a bent axle flange end circular arc polishing tool which characterized in that: comprises a stepped shaft (1), an inlet groove (4), an outlet groove (5), a polishing area (6), a profiling hole (7), a through hole (8) and an abrasive belt (9); the stepped shaft (1) is divided into a large shaft (2) and a small shaft (3); the middle of the large shaft (2) is provided with a profiling hole (7); the small shaft (3) is provided with a through hole (8), and the through hole (8) is communicated with the profiling hole (7); the part of the contour hole (7) corresponding to the arc of the flange end of the crankshaft is a polishing area (6); an inlet groove (4) and an outlet groove (5) are respectively arranged at two ends of the polishing area (6); the abrasive belt (9) is arranged on the polishing area.

2. The crankshaft flange end arc polishing tool of claim 1, wherein: the inlet grooves (4) and the outlet grooves (5) are the same in number, and one inlet groove (4) corresponds to one outlet groove (5) and is in a vertical relation.

3. The crankshaft flange end arc polishing tool of claim 1, wherein: four inlet grooves (4) and four outlet grooves (5) are respectively arranged.

4. The crankshaft flange end arc polishing tool of claim 3, wherein: the inlet grooves (4) are uniformly distributed on the shaft body of the large shaft (2) in the circumferential direction; the outlet grooves (5) are circumferentially and uniformly distributed on the end face of the connecting end of the large shaft (2) and the small shaft (3).

5. The crankshaft flange end arc polishing tool of claim 1, wherein: all the hole diameters of the profiling holes (7) are 4-6mm larger than the outer diameter of the flange end of the crankshaft.

6. The crankshaft flange end arc polishing tool of claim 1, wherein: the shaft body of the small shaft (3) is provided with a threaded hole (10).