CN215470688U

CN215470688U - Clamp positioning pin

Info

Publication number: CN215470688U
Application number: CN202121690920.2U
Authority: CN
Inventors: 罗帅; 戴刚; 曹传飞; 张陈兴; 李国利
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-01-11
Anticipated expiration: 2031-07-23

Abstract

The utility model provides a fixture positioning pin, which comprises a fixture body, a positioning pin fixed on the fixture body and a cleaning device, wherein the cleaning device is connected with the fixture body through a connecting bolt, the cleaning device is sleeved outside the positioning pin and is provided with a cutting fluid water outlet channel around the positioning pin, and the cutting fluid water outlet channel is aligned to the positioning pin according to a certain angle and is uniformly distributed around the positioning pin. The cleaning structure is arranged on the special cleaning device, so that the structural strength of the positioning pin is not influenced, the plurality of cutting fluid water outlets are arranged around the positioning pin, and cutting fluid is sprayed out from the cutting fluid water outlet channel under the pressure set by the system in the feeding and discharging process of workpieces, so that the chips remained on the positioning pin of the clamp can be removed point to point.

Description

Clamp positioning pin

Technical Field

The utility model belongs to the field of machining, and particularly relates to a clamp positioning pin used in a machining process.

Background

The crankcase and the cylinder cover of the automobile engine are one of the core parts of the engine, the structure is complex, the precision requirement is high, and the processing process can be finished through a plurality of working procedures. Therefore, high demands are made on the positioning accuracy of the crankcase and the cylinder head in each step. The residual cuttings on the positioning pins of the clamp are one of the key factors influencing the positioning accuracy of the crank case and the cylinder cover in the machining process and further generating scrapped products.

Patent document CN208163171U discloses a positioning pin, which has a self-cleaning function, and a channel for communicating an inlet and an outlet is arranged in a positioning pin body, that is, a hole is drilled in the center of the positioning pin to serve as a cleaning channel, so that the residual cuttings on the surface of the positioning pin and in the pin hole of a positioning part can be effectively and timely removed. However, it has the following limitations: 1. the diameter of the positioning pin is limited, if the diameter of the positioning pin is too small, the rigidity of the positioning pin can be affected after the center of the positioning pin is drilled, and the service life is reduced; 2. the locating pin hole is limited, and if the locating pin hole matched with the locating pin hole is a through hole, cutting fluid sprayed out of the central cleaning channel of the locating pin cannot be reflected through the bottom of the hole, so that the locating pin cannot be effectively cleaned.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the clamp positioning pin for machining the crankcase and the cylinder cover of the automobile engine, and the cleaning device is arranged on the clamp positioning pin, so that the residual cuttings on the positioning pin can be effectively removed in the machining process, and the machining qualification rate is improved.

The technical scheme of the utility model is as follows:

a fixture positioning pin comprises a fixture body and a positioning pin fixed on the fixture body; the fixture comprises a positioning pin and a clamp body, and is characterized by further comprising a cleaning device, wherein the cleaning device is connected with the clamp body through a connecting bolt, the cleaning device is sleeved outside the positioning pin and is provided with a cutting fluid water outlet channel around the positioning pin, and the cutting fluid water outlet channel is aligned to the positioning pin at a certain angle and is uniformly distributed around the positioning pin.

Furthermore, the cutting fluid water outlet channel is communicated with a cutting fluid liquid supply channel on the clamp body.

Furthermore, the cleaning device is also provided with a cutting fluid separating loop which is communicated with the cutting fluid outlet channel and is communicated with the cutting fluid supply channel.

According to the fixture positioning pin for machining the automobile crank case and the air cylinder cover, the cleaning structure is arranged on the special cleaning device, so that the structural strength of the positioning pin is not influenced, meanwhile, the plurality of cutting fluid water outlets are formed around the positioning pin, cutting fluid is sprayed out from the cutting fluid water outlet channel under the pressure set by the system in the workpiece loading and unloading process, and the chips remained on the fixture positioning pin can be removed point to point.

The utility model has the advantages of simple structure, reliable performance, strong practicability and the like.

Drawings

FIG. 1 is a schematic view of the overall assembly of a clamp locating pin.

FIG. 2 is a cross-sectional view of the fixture locating pin water outlet passage.

FIG. 3 is a cross-sectional view of a liquid supply circuit of a clamp locating pin.

Figure 4 is a bottom view of the fixture alignment pin cleaning apparatus.

In the figure: the device comprises a positioning pin 1, a cleaning device 2, a cutting fluid outlet channel 3, a cutting fluid separating loop 4, a connecting bolt hole 5, a clamp body 6 and a cutting fluid supply channel 7.

Detailed Description

The structure of the utility model is further explained in detail in the following with the attached drawings.

Referring to fig. 1, 2 and 3, the jig positioning pin includes a positioning pin 1, a cleaning device 2 and a jig body 6. The positioning pin 1 is fixed on the clamp body 6, and the cleaning device 2 is connected with the clamp body 6 through a connecting bolt hole 5. The cleaning device 2 is a plate with a certain thickness, the center of the cleaning device is provided with a hole, the positioning pin 1 is sleeved with the cleaning device 2, three cutting fluid water outlet channels 3 are arranged around the positioning pin 1 and are uniformly distributed around the positioning pin 1, and the cutting fluid water outlet channels 3 are aligned to the positioning pin 1 according to a certain angle.

Referring to fig. 4, the bottom surface of the cleaning device 2 is further provided with a cutting fluid separating loop 4 which is communicated with the three cutting fluid outlet channels 3. And a cutting fluid supply channel 7 on the clamp body 6 is communicated with the cutting fluid separating loop 4.

In the machining process of the automobile crankcase and the cylinder cover, when the clamp positioning pin is used, cutting fluid with certain pressure is introduced into the cutting fluid supply channel 7 firstly, the cutting fluid is sprayed out through the cutting fluid separating loop 4 through the cutting fluid outlet channel 3, the positioning pin 1 is washed, the cleaning of the positioning pin 1 is kept, and therefore the influence on the positioning precision caused by the residual scraps on the positioning pin 1 can be avoided.

Claims

1. A clamp positioning pin comprises a clamp body (6) and a positioning pin (1) fixed on the clamp body (6); the cutting fluid positioning device is characterized by further comprising a cleaning device (2), wherein the cleaning device (2) is connected with the clamp body (6) through a bolt, the cleaning device (2) is sleeved outside the positioning pin (1), surrounds the positioning pin (1), and is provided with a cutting fluid outlet channel (3), and the cutting fluid outlet channel (3) is aligned to the positioning pin (1) according to a certain angle and is uniformly distributed around the positioning pin (1).

2. The fixture positioning pin according to claim 1, wherein the cutting fluid outlet passage (3) communicates with a cutting fluid supply passage (7) on the fixture body (6).

3. The fixture positioning pin according to claim 2, wherein a cutting fluid separating loop (4) is further arranged on the cleaning device (2), is communicated with the cutting fluid outlet channel (3), and is communicated with the cutting fluid supply channel (7).