CN108544281B

CN108544281B - Adjustable inner core tensioning mechanism

Info

Publication number: CN108544281B
Application number: CN201810732815.7A
Authority: CN
Inventors: 龙兆富; 郭亭峰
Original assignee: YUNBO (TIANJIN) MOTOR TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: YUNBO (TIANJIN) MOTOR TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2024-06-07
Anticipated expiration: 2038-07-05
Also published as: CN108544281A

Abstract

The utility model provides an adjustable inner core tensioning mechanism, includes base, center pin, rises the piece, rises the core cover and is on the center pin, and the center pin is connected with the base, rises the piece and fixes on the base, still includes slide mechanism and positioning disk, and slide mechanism fixes in the base, and the positioning disk is fixed on the base, and the positioning disk sets up on slide mechanism, rises the piece and block on the slider. The invention mainly solves the problems of cost increase and production cycle lengthening caused by poor universality of a processing mould in the prior art by adopting a combined structure of an independent expansion block and a fixed disc.

Description

Adjustable inner core tensioning mechanism

Technical Field

The invention relates to a processing tensioning mechanism for the outer surface of a thin-wall cylinder, in particular to an adjustable inner core tensioning mechanism.

Background

The Chinese patent application with the application number 201310403015.8 and the application publication date 2014, 1 month and 1 day is searched, and the Chinese patent application is an automobile piston cylinder thin-wall outer surface processing mould, which comprises an expanding core, an expanding block cylinder, a connecting shaft, an axle center screw hole, a stud and a nut, wherein the connecting shaft, the expanding block cylinder and the expanding block are of an integrated structure, and the connecting shaft is connected with a lathe chuck. The root of the connecting shaft is connected with a swelling block cylinder, the cylinder wall of the swelling block cylinder is uniformly cut into equally-divided swelling blocks, and a round hole is processed at the bottom end of each notch. The shaft center of the bottom of the expansion block cylinder is provided with a stud, and an expansion core is connected on the stud in series. The workpiece to be processed is sleeved outside the expansion block, the expansion core is propped inwards by the inward rotation of the nut on the screw rod, the expansion block is driven to expand,

And then the inner wall of the workpiece is tightly propped up, and the outer surface of the thin workpiece is not deformed during processing. However, in the prior art, a processing mould only can process a specific product, if the size of the product changes, the product needs to be customized again according to the product to be processed, so that the workload is increased, and the product period and the cost are increased.

Disclosure of Invention

The invention adopts a split and detachable design to solve the problem that the processing mould is required to be manufactured again in the processing of cylindrical thin-wall parts with different sizes, and only the expansion blocks are required to be replaced when different products are processed, so that the production cost and the production cycle technical scheme of the products are reduced through the combination of the expansion blocks, the sliding mechanism, the positioning disc and the base.

The technical scheme of the invention is as follows:

The utility model provides an adjustable inner core tensioning mechanism, includes base, center pin, the piece that rises, rises the core, slide mechanism and positioning disk, rises the core cover on the center pin, and the center pin is connected with the base, rises the piece and fixes on slide mechanism, and slide mechanism fixes in the base, and the positioning disk is fixed on the base, and the positioning disk setting is on slide mechanism.

The base be equipped with the boss, first screw hole, mounting groove, second screw hole, third screw hole and square boss, the second screw hole is located the square boss in base center, four mounting grooves of equiangular distribution on the base are equipped with first screw hole on the both sides step of mounting groove, be equipped with the boss above the step, the periphery of boss is equipped with annular ladder, annular ladder face is less than the boss face, is equipped with the third screw hole on the annular ladder.

The sliding mechanism comprises two pressing plates, a sliding block, a connecting plate, springs and spring rods, wherein the cross section of the sliding block is in a convex shape, two columnar bulges are arranged on the sliding block, the side faces of the sliding block are attached to the inner side faces of the two pressing plates, the shoulder faces of the sliding block are attached to the bottom faces of the two pressing plates, the fixing holes of the pressing plates correspond to the first threaded holes, the two pressing plates are connected with the connecting plate, the springs are sleeved on the spring rods, one ends of the spring rods penetrate through the through holes of the connecting plate, and the other ends of the spring rods are connected with the sliding block.

The inner cambered surface of the expansion block is a conical curved surface and is matched with the expansion core, the outer cambered surface of the expansion block is a cylindrical curved surface, the diameter of the cambered surface is the same as the inner diameter of a workpiece to be processed, and a groove matched with the sliding block is formed in the bottom of the expansion block.

The positioning disk is annular and provided with a fixing hole, the bottom surface of the positioning disk is attached to the upper surface of the base, and the fixing hole of the positioning disk corresponds to a third threaded hole on the base.

The through hole of the central shaft is connected with a stress application rod.

The beneficial effects of the invention are as follows: the assembly is convenient, the expansion block is easy to replace, and only the expansion block is needed to be replaced for processing the thin-wall cylindrical parts with different sizes, so that the cost and time are saved.

Drawings

Fig. 1 is an assembly schematic of the present invention.

The figure shows that the number is 1, the central shaft, 2, the expansion block, 3, the sliding mechanism, 4, the positioning disk, 5, the base, 6, the expansion core, 7, the force applying rod, 301, the pressing plate, 302, the sliding block, 303, the connecting plate, 304, the spring, 305, the spring rod, 401, the fixing hole, 501, the boss, 502, the first threaded hole, 503, the mounting groove, 504, the second threaded hole, 505 and the third threaded hole.

Detailed Description

The invention is illustrated below in connection with specific examples:

As shown in FIG. 1, the adjustable inner core tensioning mechanism comprises a central shaft, a tensioning block, a sliding mechanism, a positioning disk, a base, a tensioning core and a stress application rod, wherein the tensioning core is sleeved on the central shaft, one end of the central shaft is provided with threads and connected with the base, the tensioning block is fixed on the base, the sliding mechanism is fixed in the base, the positioning disk is fixed on the base, the positioning disk is arranged on the sliding mechanism, and the tensioning block is clamped on the sliding mechanism.

In fig. 1, a boss is arranged on a base, a mounting groove for mounting a sliding mechanism and a first threaded hole are formed in the base, a second threaded hole for connecting a central shaft and a third threaded hole for fixing a positioning disk are formed in the base, the second threaded hole is formed in a square boss at the center of the base, four mounting grooves are distributed on the base at equal angles, the first threaded holes are formed in steps on two sides of the mounting groove, a boss is arranged on the steps, an annular step is arranged on the periphery of the boss, the annular step surface is lower than the boss surface, and the third threaded hole is formed in the annular step.

In fig. 1, the sliding mechanism comprises two pressing plates, a sliding block, a connecting plate, springs and a spring rod, wherein the cross section of the sliding block is in a convex shape, two columnar bulges are arranged on the sliding block, the side surface of the sliding block is attached to the inner side surfaces of the two pressing plates, the shoulder surface of the sliding block is attached to the bottom surfaces of the two pressing plates, the fixing holes of the pressing plates correspond to the first threaded holes, the two pressing plates are fixed with the connecting plate through screws, the springs are sleeved on the spring rod, one ends of the spring rod penetrate through the through holes of the connecting plate, and the other ends of the spring rod are in threaded connection with the sliding block.

In fig. 1, the inner cambered surface of the expansion block is a conical cambered surface and is matched with the expansion core, the outer cambered surface of the expansion block is a cylindrical cambered surface, the diameter of the cambered surface is the same as the inner diameter of a workpiece to be processed, grooves matched with the sliding blocks are formed in the bottom of the expansion block, and a certain gap is reserved between every two of the four expansion blocks.

In fig. 1, the positioning plate is annular and provided with a fixing hole, the bottom surface of the positioning plate is attached to the upper surface of the base, and the fixing hole of the positioning plate corresponds to a third threaded hole on the base.

The sliding mechanism is assembled and fixed in the base by bolts according to the connection relation between the sliding mechanism and the base, the fixing hole of the positioning disc is aligned with the third threaded hole of the base and fixed by bolts, the expansion block is clamped between the two cylindrical protrusions of the sliding block, and then the central shaft penetrates through the expansion core to be screwed into the threaded hole of the base. The workpiece to be processed is sleeved outside the expansion block, a spring rod on the sliding mechanism is connected with an air cylinder or a hydraulic cylinder, the spring resistance is overcome in a pneumatic or hydraulic mode, the spring rod is pulled to adjust the position of the expansion block, a force application rod penetrates into a through hole of the central shaft, the central shaft is rotated to inwards jack the expansion core, the expansion block is driven to expand, and then the inner wall of the workpiece is jacked. When other workpieces are replaced, the stress application rod is used for rotating the central shaft to outwards loosen the expansion core, the air pressure or the hydraulic pressure is adjusted, the sliding block is reset, and the expansion block is replaced.

The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.

Claims

1. The utility model provides an adjustable inner core tensioning mechanism, including base (5), center pin (1), rise piece (2), rise core (6) cover on center pin (1), center pin (1) are connected with base (5), rise piece (2) and fix on base (5), characterized by still including slide mechanism (3) and positioning disk (4), slide mechanism (3) are fixed in base (5), positioning disk (4) are fixed on base (5), positioning disk (4) set up on slide mechanism (3), rise piece (2) card on slide mechanism (3), base (5) are equipped with boss (501), first screw hole (502), mounting groove (503), second screw hole (504), third screw hole (505) and square boss, second screw hole (504) are located the square boss in base center, four mounting grooves (503) of equiangular distribution on base (5), be equipped with first screw hole (502) on the both sides step of mounting groove (503), be equipped with boss (501) above the step, the periphery of boss is equipped with annular ladder, annular ladder face is less than boss face, be equipped with third screw hole (505) on the annular ladder, sliding mechanism (3) are including two clamp plates (301), slider (302), connecting plate (303), slide mechanism (3), the spring (304) and spring rod (305), slider (302) cross section is protruding font, be equipped with two columnar bulge on slider (302), slider (302) side is the medial surface laminating of two clamp plates (301), the shoulder surface laminating of slider (302) and the bottom surface laminating of two clamp plates (301), the fixed orifices of clamp plate corresponds with first screw hole (502), two clamp plates (301) are connected with connecting plate (303), the cover has spring (304) on spring rod (305), the through-hole of connecting plate (303) is passed to spring rod (305) one end, the other end is connected with slider (302), the intrados of rising piece (2) is conical surface and cooperatees with rising core (6), rising piece (2) extrados be cylindrical curved surface and cambered surface diameter is the same with the internal diameter of waiting to process work piece, rising piece (2) bottom is equipped with the recess with slider (302) matched with, positioning disk (4) are the annular, be equipped with fixed orifices (401), the top laminating of positioning disk (4) bottom surface and base (5), the fixed orifices (401) of positioning disk are corresponding with the through-hole (1) on the base, the through-hole (7) are connected with the through-hole (7).