CN219284181U - Frock of short-term test connecting rod eccentric dimension - Google Patents

Abstract

The utility model provides a tool for rapidly detecting the eccentric size of a connecting rod, which comprises a workbench, wherein a first positioning cylinder, a second positioning cylinder and a gauge fixing seat are arranged on the upper surface of the workbench, and a side tensioning mechanism is arranged on the first positioning cylinder. The mechanism has the advantages of ingenious design, strong operability and obvious effect, and has obvious benefit for improving the detection efficiency.

Description

Frock of short-term test connecting rod eccentric dimension

Technical Field

The utility model relates to the field of special dimension measurement of mechanical parts, in particular to a tool for rapidly detecting the eccentric dimension of a connecting rod.

Background

When the connecting rod is processed by using the numerical control machine tool, a blank point on the side needs to be used as a positioning point of the tool clamp, and in the production process, the distance size from the blank point to the center of a connecting rod hole needs to be measured to judge whether the position of a boring hole is accurate or not, as shown in fig. 1. However, the blank point is not on the geometric center line of the big and small head holes of the connecting rod, and cannot be measured by using a traditional gauge such as a vernier caliper, and a three-dimensional coordinate system is built to evaluate the size by adopting a three-coordinate measuring instrument to acquire the blank point and the hole center. The detection process can not be rapidly measured in an online manner, and the detection of one connecting rod is required to be completed in a measuring chamber for 8-10 minutes, and under the conditions of more machine tool stations and more production line varieties, the detection time of each first part of the class is up to 40-60 minutes, and the detection waiting time causes the waste of production capacity.

Disclosure of Invention

In order to overcome the practical difficulties in the production and processing, the utility model provides a tool for rapidly detecting the eccentric size of the connecting rod, which has the advantages of ingenious design, strong operability and obvious effect and has obvious benefit for improving the detection efficiency.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a frock of short-term test connecting rod eccentric dimension, includes the workstation, the last surface mounting of workstation has first location cylinder, second location cylinder and scale fixing base, first location cylinder is provided with side tensioning mechanism.

Preferably, the first positioning column body comprises a lower tensioning block and an upper tensioning block which are matched with each other, steel balls are arranged on the outer side faces of the contact faces of the two tensioning blocks, and an elastic retainer is arranged on the outer side faces of the steel balls.

Preferably, a stud is arranged on the upper surface of the lower tensioning block, and a locking nut is sleeved on the stud in a matched manner after the stud penetrates through the upper tensioning block upwards.

Preferably, the side surfaces of the lower tensioning block and the upper tensioning block are respectively provided with a chamfer, and the steel balls are positioned between the chamfers of the two tensioning blocks.

Preferably, the elastic retainer is provided with a plurality of through holes, and the diameter of each through hole is smaller than that of the steel ball.

Preferably, a tension spring is provided between the upper tension block and the lower tension block.

Preferably, the installation position of the second positioning column body on the workbench is adjustable.

Advantageous effects

After the standard component is installed on the workbench for measurement, connecting rod parts with different sizes are fixed through the first positioning cylinder arranged on the workbench and used for tensioning the eccentric end of the connecting rod and the second positioning cylinder with adjustable installation positions, and the eccentric distance size can be rapidly and conveniently evaluated by comparing the measured value of the eccentric size of the part with the measured value of the standard component, so that the production efficiency is effectively improved.

Drawings

FIG. 1 is a schematic illustration of the measured dimensions of a connecting rod;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a detailed schematic view of the first positioning column;

FIG. 4 is a schematic diagram of a tensioning arrangement;

FIG. 5 is a schematic view of the utility model installed for measurement;

in the figure: 1. the device comprises a workbench, a first positioning column body, a second positioning column body, a gauge fixing seat, a lever gauge, a locking nut, an upper tensioning block, a lower tensioning block, a tensioning spring, a steel ball and a steel ball, wherein the workbench, the first positioning column body, the second positioning column body, the gauge fixing seat, the lever gauge, the locking nut, the upper tensioning block, the lower tensioning block, the tensioning spring, the tensioning block and the steel ball are arranged in sequence, and the steel ball is arranged in sequence.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.

In the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", etc. refer to the orientation or positional relationship based on that shown in the drawings, and are merely for the purpose of describing the present utility model and do not require that the present utility model must be constructed or operated in a specific orientation, and thus should not be construed as limiting the present utility model. "connected" and "connected" in the present utility model are to be understood broadly, and may be, for example, connected or detachably connected; the connection may be direct or indirect through intermediate members, and the specific meaning of the terms may be understood in detail by those skilled in the art.

The utility model discloses a tool for rapidly detecting the eccentric size of a connecting rod, which is shown in figures 2-5, and comprises a workbench 1, wherein the workbench is of a table-shaped structure with a bottom plate arranged above four upright posts, a scale fixing seat 4 is arranged on one side of the bottom plate and used for installing and fixing a universal lever scale 5, a first positioning column body 2 is arranged on the measuring side of the lever scale and at the corresponding position of the bottom plate, the positioning column body comprises a lower tensioning block 8, an upper tensioning block 7 and a locking nut 6, the lower tensioning block is of a step shaft structure, a first-stage shaft with the smallest diameter is arranged at the bottom of the lower tensioning block and is used as a positioning shaft, the positioning shaft is inserted into the bottom plate for positioning, and the positioning shaft is fixed with the bottom plate at a second-stage shaft structure with the largest diameter through screws. The upper surface of a third-stage shaft of a lower positioning block is provided with a plurality of first grooves, the side surface of the third-stage shaft is provided with a first chamfer, the top of the lower positioning block is a fourth-stage shaft of a stud structure, the upper positioning block is of an annular structure with a central hole, the lower surface of the annular structure is provided with a plurality of second grooves corresponding to the first grooves, the side surface of the annular structure is provided with a second chamfer corresponding to the first chamfer, a spring 9 is arranged in a space formed by the first grooves and the second grooves, steel balls are arranged in a space formed by the first chamfers and the second chamfers, an elastic retainer is arranged outside the steel balls and sleeved outside the two tensioning blocks, a plurality of through holes are formed in the elastic retainer, and the diameter of each through hole is smaller than that of each steel ball. The lock nut 6 is in threaded connection with a stud positioned at the upper part of the upper positioning block. Tightening the tensioning nut can press down the tensioning block, and the steel ball in the middle stretches out to tension the workpiece under the compression of the chamfer surface, so that the inner side wall of the big end hole of the connecting rod is tensioned and fixed.

The bottom plate is provided with a plurality of mounting holes, the second positioning column body 3 is mounted at different positions of the bottom plate through different mounting holes, the function of adjusting the center distance of the second positioning column body and the first positioning column body is achieved, the center distance between the two positioning column bodies can be adjusted through different hole sites on the bottom plate, and product compatibility is expanded.

The device is used as follows:

1) Manufacturing a standard sample similar to a tested workpiece, and detecting the tested size by using a higher-precision detection instrument to be used as a nominal value X;

2) Combining a conventional lever gauge 5 and a high-precision clamp according to the illustration;

3) The lever gauge is zeroed, the specific operation is that the gauge needle of the gauge is lifted, the standard component is placed according to the fixed gesture, the locking nut 6 is rotated, the standard component is tensioned, the gauge needle of the gauge is released lightly, the gauge needle can contact the measured position of the standard component, and the gauge is zeroed;

4) Replacing the standard part with a measured workpiece, repeating the previous operation, summing the obtained meter data value Y with the standard sample nominal value X, and obtaining a result Z (Y+X) which is the actual measured value of the measured workpiece;

5) The Z value can be directly used for adjusting the positioning size or the processing coordinate of the numerical control machine tool fixture, so that the positioning and processing are more accurate.

The utility model solves the problems that the side edge positioning size on the evaluation non-hole geometric center line in the prior art cannot be detected rapidly on the production site by using conventional detectors such as gauges and the like and excessively depends on measuring instruments.

The utility model can be widely applied to the machining evaluation of the hole system of the connecting rod part in various engine fields, and can effectively improve the production efficiency.

The method needs to be matched with a standard component, the appearance of the standard component and the diameters of key large and small head holes are required to have the same technological characteristics as the measured workpiece (or one measured workpiece can be selected as the standard component), and a three-coordinate measuring instrument and other higher-precision detecting instruments are used for obtaining the nominal value X of the measured dimension;

the method adopts a contrast measurement principle that the lever gauge is zeroed before use, and the specific method is that firstly, the gauge needle of the gauge is lifted, the standard component is placed according to the fixed gesture shown in figure 4, the locking nut of the first positioning column body is screwed down, the standard component is tensioned, at the moment, the gauge needle of the lever gauge is released lightly, and the gauge needle can contact the measurement position of the standard component to be used as the measurement zero point of the gauge.

The foregoing has been described in what is considered to be the preferred embodiments of the utility model, and the description of specific examples is only intended to provide a better understanding of the principles of the utility model. It will be apparent to those skilled in the art that modifications and equivalents may be made in accordance with the principles of the utility model, and such modifications and equivalents are considered to fall within the scope of the utility model.

Claims (6)

1. A tool for rapidly detecting the eccentric size of a connecting rod is characterized by comprising a workbench, wherein the upper surface of the workbench is provided with a first positioning cylinder, a second positioning cylinder and a gauge fixing seat, the first positioning cylinder is provided with a side tensioning mechanism,

the first positioning column body comprises a lower tensioning block and an upper tensioning block which are matched with each other, steel balls are arranged on the outer side faces of contact faces of the two tensioning blocks, and an elastic retainer is arranged on the outer side faces of the steel balls.

2. The tooling for rapidly detecting the eccentric size of the connecting rod according to claim 1, wherein a stud is arranged on the upper surface of the lower tensioning block, and a locking nut is sleeved on the stud in a matched manner after the stud penetrates through the upper tensioning block upwards.

3. The tooling for rapidly detecting the eccentric size of the connecting rod according to claim 2, wherein the side surfaces of the lower tensioning block and the upper tensioning block are respectively provided with a chamfer, and the steel balls are positioned between the chamfers of the two tensioning blocks.

4. The tooling for rapidly detecting the eccentric dimension of the connecting rod according to claim 1, wherein the elastic retainer is provided with a plurality of through holes, and the diameter of each through hole is smaller than that of the steel ball.

5. The tooling for rapidly detecting the eccentric dimension of the connecting rod according to claim 1, wherein a tensioning spring is arranged between the upper tensioning block and the lower tensioning block.

6. The tooling for rapidly detecting the eccentric dimension of the connecting rod according to claim 1, wherein the installation position of the second positioning column on the workbench is adjustable.

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