CN214867342U

CN214867342U - Positioning device for exhaust elbow

Info

Publication number: CN214867342U
Application number: CN202121179774.7U
Authority: CN
Inventors: 杨海龙; 叶菁; 袁征; 李建娜; 孙双双; 贾靖华
Original assignee: Xixia Feilong Automobile Parts Co ltd
Current assignee: Xixia Feilong Automobile Parts Co ltd
Priority date: 2021-05-30
Filing date: 2021-05-30
Publication date: 2021-11-26
Anticipated expiration: 2031-05-30

Abstract

The utility model belongs to the technical field of the return bend processing equipment for the lathe, concretely relates to positioner for exhaust elbow, including the chuck and with chuck fixed connection's pulling force hydro-cylinder, be equipped with the jack catch on the chuck, the pulling force hydro-cylinder passes through push rod drive jack catch along chuck radial movement, chuck centre of a circle department is connected with the location dabber, the side of location dabber has the chaplet that at least three structure is the same along circumferencial direction evenly distributed, the chaplet is tight in advance through the strutting arrangement in the location dabber to be positioned the inner chamber of return bend. When specifically using, the location terminal surface and the chuck terminal surface of exhaust return bend are laminated mutually, and the core props outwards and props tight exhaust return bend in advance through the inside strutting arrangement of positioning core axle, realizes the preliminary location of exhaust return bend, then the pulling force hydro-cylinder passes through push rod drive jack catch chucking exhaust return bend, realizes the final location of exhaust return bend, makes through such structural design to be accurate by exhaust return bend location center, guarantees that the location center does not squint, and the exhaust return bend size of processing is accurate.

Description

Positioning device for exhaust elbow

Technical Field

The utility model belongs to the technical field of the return bend processing equipment for the lathe, concretely relates to positioner is used to exhaust return bend.

Background

When two ends of the existing exhaust elbow are pipe openings, a positioning center of a finish machining process is not easy to guarantee, and the existing exhaust elbow needs to be positioned by means of a process table. When the tube wall has no available process table, the processing positioning and the size can not be basically ensured.

The patent with publication number CN202571884U discloses a special fixture for engine exhaust port elbow lathe, which includes a chassis and a positioning seat arranged in the middle of the chassis for installing a workpiece to be machined, wherein locking mechanisms are symmetrically arranged on the chassis on the four peripheral parts of the positioning seat, each locking mechanism includes a fixed seat fixedly arranged on the chassis, a screw rod which is screwed with the fixed seat and vertically faces the workpiece to be machined, and a nut for locking the screw rod on the fixed seat, and a positioning part for fixing the workpiece to be machined is arranged on the inner end of the screw rod. However, when the bent pipe is processed by the clamp without a process table, the positioning center is not easy to guarantee, and the precision and the size of the processed product are not high.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a positioner for exhaust return bend, solve when exhaust return bend pipe wall does not have usable technology platform, the location difficulty, the unsafe problem of machining dimension.

In order to solve the technical problem, the utility model discloses a technical scheme does: the utility model provides an exhaust positioner for return bend, includes chuck and with chuck fixed connection's pulling force hydro-cylinder, be equipped with the jack catch that a plurality of structures are the same on the chuck, the pulling force hydro-cylinder passes through push rod drive jack catch along chuck radial movement, chuck centre of a circle department bolted connection has the location dabber, and the side of location dabber has the chaplet that at least three structure is the same along circumferencial direction evenly distributed, and the chaplet props the inner chamber of tightly being fixed a position the return bend through the strutting arrangement in the location dabber in advance.

Furthermore, a hole with the same cross-sectional shape and cross-sectional size as the chaplet is formed in the position, corresponding to the chaplet, of the positioning mandrel, the top of the chaplet is provided with a radian, the inside of the chaplet is of a hollow structure, the chaplet is located in the hole, the supporting device is a spring, and one end of the spring is fixed in the chaplet.

Furthermore, the hole is a blind hole, and the other end of the spring is fixed at the bottom of the blind hole.

Furthermore, the positioning core shaft is of a hollow structure, the hole is a through hole, a central shaft is arranged at the axis of the positioning core shaft, two ends of the central shaft are fixedly connected with two ends of the positioning core shaft, and the other end of the spring is fixed on the side face of the central shaft.

Further, the positioning core shaft is of a hollow structure, the supporting device is of a wedge-shaped mechanism, the wedge-shaped mechanism comprises a wedge-shaped head and a push rod fixedly connected with the bottom of the wedge-shaped head, the push rod is connected with a push rod of the tension oil cylinder, a through hole which is the same as the cross section shape and the cross section size of the core support is arranged in a position, corresponding to the core support, of the positioning core shaft, the core support is located in the through hole, the top of the core support is hemispherical, and the bottom of the core support is matched with the side face of the wedge-shaped head.

Furthermore, the top of the clamping jaw is arc-shaped, the clamping jaw comprises a first clamping jaw, a second clamping jaw and a third clamping jaw, and the arc lengths of the tops of the first clamping jaw, the second clamping jaw and the third clamping jaw are equal to one third of the circumferential length of the positioned bent pipe.

The utility model has the advantages that:

the utility model provides a pair of positioner for exhaust return bend, design through its location dabber and chaplet, when specifically using, the location terminal surface and the chuck terminal surface of exhaust return bend laminate mutually, the chaplet outwards props tight exhaust return bend through the inside strutting arrangement of location dabber in advance, realize the preliminary location of exhaust return bend, then the pulling force hydro-cylinder passes through push rod drive jack catch chucking exhaust return bend, realize the final positioning of exhaust return bend, make through such structural design to be accurate by exhaust return bend positioning center, guarantee that positioning center does not squint, the exhaust return bend size of processing is accurate.

Drawings

FIG. 1: the utility model discloses a structure sketch map of a positioning mechanism for an exhaust elbow in embodiment 1;

FIG. 2: the axial section view of the core support position in the positioning core shaft in the embodiment 1 of the utility model;

FIG. 3: the axial section view of the core support position in the positioning core shaft in the embodiment 2 of the utility model;

FIG. 4: the axial section view of the core support of the positioning core shaft in the embodiment 3 of the utility model;

FIG. 5: the cross-sectional view along the direction of A-A in figure 4 in embodiment 3 of the present invention.

The specific implementation mode is as follows:

the following describes the embodiments of the present invention with reference to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5.

Example 1:

according to fig. 1, fig. 2 shows, a positioner for exhaust elbow includes chuck 1 and with chuck 1 fixed connection's pulling force hydro-cylinder 2, be equipped with the same jack catch one 4 of structure, jack catch two 5 and jack catch three 6 on chuck 1, pulling force hydro-cylinder 2 drives jack catch one 4, jack catch two 5 and jack catch three 6 through the push rod and follows the radial movement of chuck 1, chuck 1 centre of a circle department bolted connection has positioning core axle 3, positioning core axle 3 keeps away from the side of chuck and has the same chaplet one 7, chaplet two 8 and chaplet three 9 of structure along circumferencial direction evenly distributed, chaplet one 7, chaplet two 8 and chaplet three 9 of chaplets tightly advance the inner chamber of being positioned the elbow through the strutting arrangement in the positioning core axle 3.

The positioning core shaft 3 is provided with a first blind hole, a second blind hole and a third blind hole which are the same as the first chaplet 7 in cross-sectional shape and cross-sectional size, the top of the first chaplet 7 is provided with an arc, the inside of the first chaplet 7 is of a hollow structure, the cross section of the first chaplet 7 is circular, the first chaplet 7 is inserted into the first blind hole, the supporting device is a first spring 10, a second spring 11 and a third spring 12 which are the same in structure, one end of the spring 10 is fixed inside the first chaplet 7, the other end of the spring 10 is fixed at the bottom of the first blind hole, one end of the spring 11 is fixed inside the second chaplet 8, the other end of the spring 11 is fixed at the bottom of the second blind hole, one end of the spring 12 is fixed inside the third chaplet 9, and the other end of the spring 12 is fixed at the bottom of the third blind hole.

The arc lengths of the top arcs of the first jaw 7, the second jaw 8 and the third jaw 9 are equal to one third of the circumferential length of the positioned bent pipe.

The chuck is hydraulic chuck, and specific model is: YK 3-10' 10 inch cartridge of Everyki.

In the specific use, the positioning surface of the exhaust elbow to be processed is attached to the end surface of the chuck 1, in the process, the inner cavity of the exhaust elbow enables the first spring 10, the second spring 11 and the third spring 12 to be compressed inwards, due to the reaction principle of force, the first spring 10, the second spring 11 and the third spring 12 all provide supporting force outwards, the first core support 7, the second core support 8 and the third core support 9 pre-support the exhaust elbow in the inner cavity of the exhaust elbow to realize primary positioning, then the push rod of the pull oil cylinder 2 drives the first jaw 7, the second jaw 8 and the third jaw 9 to contract inwards to compress the exhaust elbow to realize final positioning, the positioning center of the exhaust elbow is accurate through the structural design, the positioning center is not deviated, and the size of the processed exhaust elbow is accurate.

Example 2:

as shown in fig. 3, it differs from example 1 in that: the positioning mandrel 13 is of a hollow structure, holes corresponding to the first core support 7, the second core support 8 and the third core support 9 on the positioning mandrel 13 are through holes, a central shaft 14 is arranged at the axis of the positioning mandrel 13, two ends of the central shaft 14 are fixedly connected with two ends of the positioning mandrel 13, and the other ends of the first spring 10, the second spring 11 and the third spring 12 are fixed on the side face of the central shaft 14.

Example 3:

as shown in fig. 4 and 5, the difference from embodiment 2 is that: the axle center of the positioning mandrel 13 is provided with a supporting device which is a wedge-shaped mechanism, the wedge-shaped mechanism comprises a wedge-shaped head 15 and a pull rod 19 fixedly connected with the bottom of the wedge-shaped head 15, the pull rod 19 is connected with a push rod of a tension oil cylinder, the tops of the first core support 16, the second core support 17 and the third core support 18 are all hemispheric, and the bottoms of the first core support 16, the second core support 17 and the third core support 18 are all matched with the side face of the wedge-shaped head 15.

The present invention has been described in detail with reference to the accompanying drawings and examples. It should be understood that in practice the description of all possible embodiments is not exhaustive and that the inventive concepts of the present invention are presented herein by way of illustration as much as possible. Without departing from the inventive concept of the present invention and without paying creative efforts, the technical features of the embodiments described above are replaced by conventional techniques, and all the specific embodiments should belong to the disclosure hidden in the present invention.

Claims

1. The utility model provides an exhaust positioner for return bend, includes chuck and the pulling force hydro-cylinder with chuck fixed connection, be equipped with the jack catch that a plurality of structures are the same on the chuck, the pulling force hydro-cylinder passes through push rod drive jack catch along chuck radial movement, its characterized in that: the positioning core shaft is connected with the center of the chuck through a bolt, at least three core supports with the same structure are uniformly distributed on the side surface of the positioning core shaft along the circumferential direction, and the core supports pre-support the inner cavity of the positioned bent pipe through a supporting device in the positioning core shaft.

2. The positioning device for an exhaust elbow according to claim 1, wherein: the position of the positioning core shaft corresponding to the chaplet is provided with a hole with the same cross-sectional shape and cross-sectional size as the chaplet, the top of the chaplet is provided with a radian, the inside of the chaplet is of a hollow structure, the chaplet is positioned in the hole, the supporting device is a spring, and one end of the spring is fixed in the chaplet.

3. The positioning device for an exhaust elbow according to claim 2, wherein: the hole is a blind hole, and the other end of the spring is fixed at the bottom of the blind hole.

4. The positioning device for an exhaust elbow according to claim 2, wherein: the positioning core shaft is of a hollow structure, the hole is a through hole, a central shaft is arranged at the axis of the positioning core shaft, two ends of the central shaft are fixedly connected with two ends of the positioning core shaft, and the other end of the spring is fixed on the side face of the central shaft.

5. The positioning device for an exhaust elbow according to claim 1, wherein: the positioning mandrel is of a hollow structure, the supporting device is a wedge-shaped mechanism, the wedge-shaped mechanism comprises a wedge-shaped head and a push rod fixedly connected with the bottom of the wedge-shaped head, the push rod is connected with a push rod of the tension oil cylinder, a through hole which is the same as the cross section shape and the cross section size of the core support is arranged in a position, corresponding to the core support, of the positioning mandrel, the core support is located in the through hole, the top of the core support is hemispherical, and the bottom of the core support is matched with the side face of the wedge-shaped head.

6. The positioning device for an exhaust elbow according to claim 1, wherein: the top of the clamping jaw is arc-shaped, the clamping jaw comprises a first clamping jaw, a second clamping jaw and a third clamping jaw, and the arc lengths of the tops of the first clamping jaw, the second clamping jaw and the third clamping jaw are equal to one third of the circumferential length of the positioned bent pipe.