CN115635331A - Automatic transposition clamp for pipe joint - Google Patents

Abstract

The invention discloses an automatic transposition clamp for a pipe joint, which comprises an upper fixing block and a lower fixing block, wherein the upper fixing block and the lower fixing block are respectively connected with an upper chuck and a lower chuck in a shaft sleeve manner; the upper end face of the upper chuck is provided with a sliding block, the sliding block is circumferentially connected to the upper chuck in a sliding manner, and the sliding block drives the upper chuck to rotate. The pipe joint can be clamped by the upper chuck and the lower chuck for processing, after one end is processed, the upper end can clamp the pipe joint and integrally rotate with the lower chuck under the drive of a machine tool hydraulic system, so that different joints are switched for processing, the traditional combined clamp is replaced, and the workload of disassembling and assembling the clamp is reduced.

Description

A pipe joint automatic indexing fixture

technical field

The invention relates to the field of fixtures, in particular to a pipe joint automatic indexing fixture.

Background technique

Pipe joints are the main pipeline connectors of multiple systems such as aviation hydraulic pressure, fuel oil, and environmental control. Fuel, air and other media play the role of diversion, confluence and flow limitation. Due to the wide working area, it has various structural forms. According to the number of nozzles, it can be divided into two-way, three-way, four-way and five-way pipe joints. According to the structure, it can be divided into non-eccentric pipe joints and eccentric structure pipe joints.

Due to the structural characteristics of the pipe joint parts, most of them are processed by forging blanks, resulting in poor positioning benchmarks, and the processing parts are not in the same direction, resulting in many times of clamping. At present, the processing of pipe joint parts will produce the following defects:

1. In the form of traditional ordinary lathe plus combined fixture or simple fixture, a set of combined fixture is required for each nozzle structure on one side, which is inconvenient for loading and unloading due to the variety of fixtures and their large size.

2. At present, by changing the jaw structure and optimizing it to a CNC lathe plus self-made simple fixtures, the surface quality of parts processing has been greatly improved. However, with the substantial increase in output and the shortening of the production cycle, the method of sequentially processing a single nozzle with a CNC lathe and self-made simple fixtures can no longer meet the current production needs. Single processing of pipe parts leads to low processing efficiency due to multiple clamping times.

3. At present, the steering fixture is used for processing, and the mechanical structure is used for intermittent movement, or the steering control of the servo motor is used for steering. The accuracy of the servo motor steering can meet the requirements, but the torque is small, and the solid pipe head is processed up and down. If the clamping force of the collet is too large, it will easily cause the servo motor to be overloaded.

Contents of the invention

In order to solve these problems, the present invention is an automatic indexing fixture for pipe joints. Through the indexing fixture, the fast clamping and automatic indexing fixtures of pipe joint parts on the CNC lathe are automatically researched and designed, and the pipe joint parts are realized. Efficient and high-quality machining on CNC lathes.

In order to achieve the technical effect of solving the above technical problems, the present invention is achieved through the following technical solutions:

An automatic indexing fixture for a pipe joint, comprising an upper fixing block and a lower fixing block, the upper fixing block and the lower fixing block are respectively connected with an upper chuck and a lower chuck, and the upper chuck and the lower chuck are arranged There are four notches, and the opposite sides are distributed correspondingly, and the lower chuck is provided with a piston head, and the piston head sleeve is slidably connected to the lower fixed block; the upper end surface of the upper chuck is provided with a slider, and the slider is circumferentially Slidingly connected to the upper chuck, the slider drives the upper chuck to rotate;

Further, the upper end surface of the upper chuck is provided with four circumferential chute, the slider is slidably connected in the circumferential chute, and the side wall of the slider is provided with a spring, and is connected to the corresponding chute through the spring. The side wall of the slider extends out of the outer end of the chute;

Further, a retaining ring is provided outside the slider of the upper chuck, and the retaining ring is fixedly connected with the upper fixing block to close the upper end of the upper chuck to form a sealed cavity, and the side wall of the retaining ring is also provided with an oil inlet The oil inlet and the oil outlet are arranged on the front side of two adjacent sliders;

Further, a small groove is provided at the wall of the retaining ring that the slider contacts, and the end of the slider is engaged in the small groove;

Further, the cavity formed by the upper chuck and the retaining ring is larger at the slider than at the oil inlet;

Further, the upper fixed block and the lower fixed block are provided with bolts, and are fixedly connected to the machine tool by bolts;

Further, the side wall and the bottom of the cylinder where the piston head is located are respectively provided with an oil outlet and an oil inlet.

The beneficial effects of the present invention are:

1. The present invention can process the pipe joint by the upper chuck and the lower chuck. After one end is processed, it can be driven by the hydraulic system of the machine tool. The upper end clamps the pipe joint and the lower chuck and rotates integrally, thereby switching between different The joints are processed to replace the traditional combined fixture, reducing the workload of disassembling and installing the fixture.

2. When the present invention processes multi-head pipe joints, the upper and lower chucks can be rotated to process the clamped pipe joints one by one, without the need to disassemble and assemble the fixture when processing the next end, thereby improving the durability of the multi-head. Pipe joint processing efficiency.

3. The present invention combines the hydraulic system of the CNC machine tool for automatic indexing pipe joint processing, and the clamping pipe joint also clamps the workpiece through the lower end under hydraulic drive, thereby ensuring the stability of the pipe joint and replacing the mainstream servo motor Drive the steering to increase the service life of the clamp and meet the strength of the clamped pipe joint.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that are required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the overall structure of a pipe joint automatic indexing fixture;

Fig. 2 is a front view of a pipe joint automatic indexing fixture;

Fig. 3 is a sectional view of a pipe joint automatic indexing fixture;

Fig. 4 is an internal view of the upper chuck of a pipe joint automatic indexing fixture;

Fig. 5 is a schematic diagram of a two-way pipe joint clamped by a pipe joint automatic indexing fixture;

Fig. 6 is a schematic diagram of a three-way pipe joint clamped by a pipe joint automatic indexing fixture;

Fig. 7 is a schematic diagram of a four-way pipe joint clamped by a pipe joint automatic indexing fixture;

The labels in the figure are represented as: 1-upper fixed block, 2-lower fixed block, 201-bolt, 202-oil inlet, 203-oil outlet, 3-upper chuck, 301-upper end face, 302-slider , 303-clamping part, 304-spring, 4-stop ring, 401-oil outlet a, 402-oil inlet a, 403-small groove, 5-lower chuck, 501-piston head, 600-four Through pipe joint, 601-two-way pipe joint, 602-three-way pipe joint.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Refer to Fig. 1 to Fig. 4 for an automatic indexing fixture for pipe joints, including an upper fixed block 1 and a lower fixed block 2, both of which are provided with bolts 201, and are fixedly connected to the machine tool by bolts 201 superior. The upper fixing block 1 and the lower fixing block 2 are respectively connected with an upper clamp 3 and a lower clamp 5 by sleeves, and are used for clamping multi-terminal pipe joint parts. The upper chuck 3 and the lower chuck 5 are provided with four notches, and the opposite sides are distributed with multi-terminals corresponding to interlocking pipe joints for clamping. And the lower chuck 5 is provided with a piston head 501, the piston head 501 is sleeved and slidably connected to the lower fixed block 2, the body of the lower fixed block 2 is a cylinder, and the side wall and the bottom of the cylinder where the piston head 501 is located are respectively provided with Oil outlet 203 and oil inlet 202. Driven by the hydraulic system of the machine tool, the piston head 501 performs telescopic movement in the cylinder, thereby pushing the lower chuck 5 to clamp the pipe head part.

The upper end surface 301 of the upper chuck 3 is provided with a slider 302, the slider 302 is slidably connected to the upper chuck 3 in the circumferential direction, the hydraulic oil in the hydraulic system of the machine tool pushes the slider 302, and the slider 302 drives the upper chuck 3 to rotate, thereby driving The entire fitting part rotates. The upper end surface 301 of the upper chuck 3 is provided with four circumferential chute, the sliding block 302 is slidably connected in the circumferential chute, and the side wall of the sliding block 302 is provided with a spring 304, and is connected to the corresponding chute through the spring 304. The side wall of the sliding block 302 extends out of the outer end of the chute. The outer side of the slider 302 of the upper chuck 3 is also provided with a stop ring 4, which is fixedly connected with the upper fixed block 1 to close the upper end of the upper chuck 3 to form a sealed cavity, and the operation drives the oil circuit of the rotating hydraulic oil. The side wall of the retaining ring 4 is also provided with an oil inlet 402 and an oil outlet 401. The oil inlet 202 and the oil outlet 203 are arranged on the front side of the two phase collar sliders 302, and are connected to the hydraulic system of the machine tool. The oil inlet 202 It is 90 degrees to the oil outlet 203, so that the upper clamp 3 can be driven to rotate at a corresponding 90 degrees. There is also a small groove 403 at the wall of the retaining ring 4 that the slider 302 touches, and the end of the slider 302 is engaged in the small groove 403. After the hydraulic oil drives the chuck 3 to rotate 90 degrees in turn, it is convenient to move on the spring. Under the action of the elastic force of 304, the top-touch slider 302 engages, thereby performing precise positioning and rotating 90 degrees. The cavity formed by the upper chuck 3 and the retaining ring 4 is larger than the oil inlet 202 at the slider 302, so that the hydraulic oil flows preferentially to the larger cavity after entering, so as to ensure the uniform rotation direction during the initial hydraulic drive.

Example 2

Referring to Figures 1 to 7 of this embodiment, it is a pipe joint automatic indexing fixture. Figures 5 to 7 are schematic diagrams of clamping pipe joints with different numbers of ends. In the upper chuck 3 and the lower chuck 5, pipe joints with different numbers of ends can be processed at the same time, thereby improving the processing efficiency. Through the hydraulic drive system, the lower clamp 5 and the upper clamp 3 are pushed to fasten and clamp the pipe joint. After the first end is processed, the upper chuck 3 is driven to rotate through the hydraulic system, thereby driving the upper and lower chucks 5 and the pipe joint parts to rotate 90 degrees, and each end is processed. If the number of ends is less than When there are four terminals, when programming commands are performed, multiple rotation drives are performed. In this way, the same fixture can process pipe joints with different numbers of ends. At the same time, the hydraulic drive system can drive the collet to rotate and process each end in sequence, which greatly improves the processing efficiency and enhances the clamping performance of pipe joints. Stability and firmness, so as to ensure high-precision processing of pipe joints.

In the description of this specification, descriptions with reference to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments are not exhaustive in all detail, nor are the inventions limited to specific embodiments described. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (7)

1. A pipe joint automatic indexing fixture, it is characterized in that, comprises upper fixed block, lower fixed block, and described upper fixed block, lower fixed block are connected with upper chuck and lower chuck respectively by axle sleeve, and described upper clamp The head and the lower chuck are provided with four notches, and the opposite sides are distributed correspondingly to each other, and the lower chuck is provided with a piston head, and the piston head sleeve is slidably connected to the lower fixing block; the upper end surface of the upper chuck is provided with a sliding block, the slider is slidingly connected to the upper chuck in the circumferential direction, and the slider drives the upper chuck to rotate. 2. A pipe joint automatic indexing fixture according to claim 1, characterized in that, the upper end surface of the upper chuck is provided with four circumferential chute, and the slider is slidably connected in the circumferential chute , and the side wall of the slider is provided with a spring, and is connected to the corresponding side wall of the chute through the spring, and the slider extends out of the outer end of the chute. 3. A pipe joint automatic indexing fixture according to claim 2, characterized in that, a retaining ring is provided outside the slider of the upper chuck, and the retaining ring is fixedly connected with the upper fixing block to close the upper chuck The upper end of the upper end forms a sealed cavity, and the side wall of the retaining ring is also provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are arranged on the front side of two adjacent sliders. 4 . The fixture for automatic indexing of pipe joints according to claim 3 , wherein a small groove is provided at the retaining ring wall where the slider contacts, and the end of the slider is engaged in the small groove. 5 . 5 . The pipe joint automatic indexing fixture according to claim 3 , wherein the cavity formed by the upper chuck and the retaining ring is larger at the slider than at the oil inlet. 6 . 6 . The pipe joint automatic indexing fixture according to claim 1 , wherein the upper fixing block and the lower fixing block are both provided with bolts, and are fixedly connected to the machine tool by bolts. 7 . The automatic indexing fixture for pipe joints according to claim 1 , wherein the side wall and the bottom of the cylinder where the piston head is located are respectively provided with an oil outlet and an oil inlet.

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