CN110614514A

CN110614514A - Machining tool for turning internal threads of connector body

Info

Publication number: CN110614514A
Application number: CN201910994514.6A
Authority: CN
Inventors: 刘翠煜; 许结利; 周文伟
Original assignee: Hubei Sanjiang Space Wanshan Special Vehicle Co Ltd
Current assignee: Hubei Sanjiang Space Wanshan Special Vehicle Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2019-12-27

Abstract

The invention discloses a processing tool for turning internal threads of a connector body, which comprises an eccentric mandrel, a positioning pin, a pressing plate, a bolt rod and a nut, wherein a boss is arranged at one end of the eccentric mandrel, the boss and the eccentric mandrel are eccentrically arranged, the axial center line of the boss is perpendicular to the axial center line of the eccentric mandrel, a bolt hole is distributed in the eccentric mandrel and positioned on the outer side of the boss, the positioning pin is arranged in the bolt hole, a threaded hole is formed in the center of the boss, the bolt rod is arranged in the threaded hole, the nut is sleeved on the bolt rod, and the pressing plate is sleeved on the bolt rod and positioned. When the product is used, the product is sleeved on the lug boss and the bolt rod, is positioned and installed through the positioning pin, and is connected and fixed through the pressing plate and the nut. The processing tool is high in positioning accuracy and convenient to install, can avoid the conditions that alignment caused by direct clamping of the four-jaw chuck is time-consuming, clamping is not firm, and processing accuracy is low, can realize quick positioning and clamping of a product, improves the processing efficiency of the product, and guarantees the processing accuracy of parts.

Description

Machining tool for turning internal threads of connector body

Technical Field

The invention relates to the field of fixtures, in particular to a machining fixture for turning internal threads of a joint body.

Background

In the existing production and manufacturing process, more joint parts are processed. The product related to the invention is mainly applied to a joint in a vehicle steering system, is a non-circular irregular part, has an outer surface which is an unprocessed irregular contour casting blank surface, is easy to loosen in the processing process, can be clamped only by a four-jaw chuck, is difficult to align and clamp, and causes the form and position tolerance of the processed contour to be difficult to ensure. If can design a frock, satisfy in this type of joint body part batch production process, can satisfy the clamping alignment work of all parts after the clamping, just can realize quick location, will shorten location and alignment time greatly, improve the machining precision simultaneously, extensively be applicable to batch production.

Disclosure of Invention

The invention provides a machining tool for turning internal threads of a joint body, which effectively solves the problems that the alignment and clamping are difficult and the precision is difficult to guarantee in the machining process of the joint body.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a be used for connecting internal screw thread processing frock of body turning, includes eccentric mandrel, locating pin, clamp plate, shank of bolt, nut, the one end of eccentric mandrel is equipped with the boss, the boss with eccentric mandrel is eccentric settings, and the axial centerline of boss is mutually perpendicular with the axial centerline of eccentric mandrel, has laid a plurality of round pin shaft holes outside the boss on the eccentric mandrel, is equipped with the locating pin in the round pin shaft hole, and the boss center is equipped with the screw hole, and threaded hole is equipped with the shank of bolt, and the cover is equipped with the nut on the shank of bolt, lies in the cover between nut and the boss on the shank of bolt.

Preferably, one end of the eccentric mandrel is in a stepped cylindrical shape, and the other end of the eccentric mandrel is milled with a circular boss.

Preferably, the number of the pin shaft holes is at least two, and the pin shaft holes are uniformly arranged along the outer circumference of the circular boss.

Preferably, three pin shaft holes are provided.

Preferably, the pin shaft hole and the threaded hole are arranged coaxially with the boss.

Preferably, the pressing plate is circular, a through hole is formed in the center of the pressing plate, and the inner diameter of the through hole is equal to or larger than the outer diameter of the bolt rod.

Preferably, the two ends of the bolt rod are respectively provided with an external thread matched with the threaded hole and the nut.

Due to the structure, the invention has the advantages that:

the processing tool is high in positioning accuracy and convenient to install, the conditions that alignment is time-consuming, clamping is not firm and processing accuracy is low when a four-jaw chuck is used for direct clamping can be avoided, and quick positioning and clamping of a product can be achieved, so that the processing efficiency of the product is greatly improved, and the processing accuracy of parts is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic view of the joint body of the present invention for clamping during internal thread turning;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic view of the construction of the eccentric spindle of the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic structural view of a locating pin according to the present invention;

FIG. 6 is a side view of a locating pin of the present invention;

FIG. 7 is a schematic view of the construction of the platen of the present invention;

FIG. 8 is a cross-sectional view of FIG. 7;

FIG. 9 is a schematic view of the construction of the bolt shank of the present invention;

fig. 10 is a side view of fig. 9.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 10, the present embodiment provides a processing tool for turning an internal thread of a joint body, including an eccentric mandrel 1, a positioning pin 2, a pressing plate 3, a bolt rod 4, and a nut 5, one end of the eccentric mandrel 1 is provided with a boss 11, the boss 11 and the eccentric mandrel 1 are eccentrically arranged, an axial center line of the boss 11 is perpendicular to an axial center line of the eccentric mandrel 1, a plurality of bolt holes 12 are arranged on the eccentric mandrel 1 outside the boss 11, the positioning pin 2 is arranged in the bolt hole 12, a threaded hole 111 is arranged at the center of the boss 11, the bolt rod 4 is arranged in the threaded hole 111, the nut 5 is sleeved on the bolt rod 4, and the pressing plate 3 is sleeved on the bolt rod 4 between the nut 5 and the boss 11.

In this embodiment, the eccentric mandrel 1 is formed by processing a circular bar, the left end of the eccentric mandrel 1 is in a stepped cylindrical shape and is used as a clamping surface of the three-jaw chuck, and the right end of the eccentric mandrel 1 is milled with a circular boss 11 and is used as a positioning reference of the product joint body 6. At least two pin shaft holes 12 are formed in the eccentric mandrel 1 and distributed around the boss 11, and the pin shaft holes 12 are uniformly formed along the outer circumference of the circular boss 11. In this embodiment, three pin shaft holes 12 are provided for limiting the rotation of the joint body 6 around the circular boss 11 and/or the bolt shank 4 during the machining process and the radial movement relative to the circular boss 11 and/or the bolt shank 4. The pin shaft hole 12 around the circular boss 11 and the threaded hole 111 in the center of the circular boss 11 are both arranged coaxially with the boss 11.

The pressing plate 3 is circular, a through hole 31 is formed in the center of the pressing plate 3, and the inner diameter of the through hole 31 is equal to or larger than the outer diameter of the bolt rod 4, so that the installation is facilitated.

And external threads matched with the threaded hole 111 and the nut 5 are respectively arranged at two ends of the bolt rod 4.

The working principle of the structure is as follows:

the process that this processing frock realized quick clamping and high accuracy processing does:

when the joint body 6 needs to be machined to turn an internal thread, firstly a positioning pin 2 is arranged in a pin shaft hole 12 of an eccentric mandrel 1, a bolt rod 4 is arranged in a boss central bolt hole 111, then a three-jaw chuck (not shown in the figure) is coaxially clamped on a cylindrical surface at the left end of the eccentric mandrel 1 and is arranged on machining equipment for machining the internal thread of the joint body 6, alignment is carried out by attaching and positioning the end surface of the three-jaw chuck and a step surface of the eccentric mandrel 1, then the joint body 6 of a product is sleeved on a boss 11 and the bolt rod 4 of the eccentric mandrel 1 and is butted through the positioning pin 2 and a corresponding hole position on the product, finally a pressure plate 3 is sleeved outside the bolt rod 4 and is pressed above the joint body 6 for limiting the axial movement of the joint body 6 relative to the boss 11 and/or the bolt rod 4, and the eccentric mandrel 1, the bolt rod and the bolt rod are/or the joint body, The joint body 6 and the pressing plate 3 are connected and fixed to complete the pressing and fixing of the joint body 6, and the internal thread turning processing is carried out on the joint body 6.

After the product joint body 6 is machined, the product part can be taken down only by unscrewing the nut 5 and taking down the pressing plate 3, then the next joint body 6 is sleeved on the lug boss and the bolt rod, and the next product to be machined is clamped by the same method.

The principle that this processing frock can realize quick clamping and high accuracy processing lies in:

firstly, the eccentric distance of the eccentric shaft 1 of the tooling is set according to the size of the joint body 6 of a product, and the axial center line of the to-be-turned internal threaded hole 61 of the joint body 6 can be ensured to be superposed with the center line of the three-jaw chuck, so that the clamping and aligning work of the batch of parts can be met after one-time clamping.

Secondly, through boss 11 and locating pin 2 on eccentric mandrel 1, can carry out location fit with product center and corresponding hole site, the screw hole 111 at boss center corresponds the cooperation with shank of bolt 4, clamp plate 3 and the laminating of product upper surface, it is fixed to screw up through nut 5 at last, six degrees of freedom in the product turning process have been restricted, be about to the product complete fixation, drunkenness and rotation in any direction have been avoided, tight reliable clamp when having guaranteed simple to operate, the alignment is convenient, the while has avoided the problem that the machining precision can't be guaranteed because the product is not hard up in the course of working.

In addition, when the processing tool is not used, the joint body 6 can be clamped and aligned only by the four-jaw chuck because the clamping part of the joint body 6 is an unprocessed blank surface; after the processing tool is adopted, the cylindrical surface of the eccentric mandrel 1 can be directly clamped by the three-jaw chuck, the three-jaw chuck has a self-centering function, the joint body 6 can be more conveniently clamped and aligned, and the situation that the hole line is aligned directly through the outer contour of a four-jaw chuck clamping workpiece blank is avoided.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a processing frock for connecting internal thread of body turning which characterized in that: including eccentric mandrel, locating pin, clamp plate, shank of bolt, nut, the one end of eccentric mandrel is equipped with the boss, the boss with eccentric mandrel is eccentric setting, and the axial central line of boss is mutually perpendicular with the axial central line of eccentric mandrel, has laid a plurality of round pin shaft holes outside the boss on the eccentric mandrel, is equipped with the locating pin in the round pin shaft hole, and the boss center is equipped with the screw hole, and threaded hole is equipped with the shank of bolt, and the cover is equipped with the nut on the shank of bolt, and the cover is equipped with the clamp plate on the shank of bolt between nut and the boss.

2. The processing tool according to claim 1, characterized in that: one end of the eccentric mandrel is in a stepped cylindrical shape, and a circular boss is milled at the other end of the eccentric mandrel.

3. The processing tool according to claim 2, characterized in that: the round boss is characterized in that at least two pin shaft holes are formed, and the pin shaft holes are uniformly formed in the outer circumference of the round boss.

4. The processing tool according to claim 3, characterized in that: the number of the pin shaft holes is three.

5. The processing tool according to claim 1, characterized in that: the pin shaft hole and the threaded hole are coaxially arranged with the boss.

6. The processing tool according to claim 1, characterized in that: the clamp plate is circular, and clamp plate central authorities are equipped with the through-hole, the through-hole internal diameter equals or is greater than the external diameter of bolt pole.

7. The processing tool according to claim 1, characterized in that: and external threads matched with the threaded holes and the nuts are respectively arranged at two ends of the bolt rod.