Automatic Clamp Research Articles

Review on Design Fixtures for Wheel House of Car

Abstract: A fixture is a work-holding device used in the manufacturing industry. Fixture’s primary purpose is to create a secure mounting point for a work piece, allowing for support during operation and increased accuracy, precision, reliability, and interchange ability in the finished parts. This paper present Review on Design of fixture for wheel house of car. This component is a part of Four wheeler Car. The operation to be performed is Spot welding. The evaluated fixture uses Mylar, Riser, Clamp arm ,Plate, Base plate, welding part used for work support for holding the work piece driven by Pneumatic Air. This is Multipale used new fixture achieves automatic clamping of parts in same fixture.

Mechanism Optimization of the Clamping and Cutting Arrangement Device for Solanaceae Scion and Stock Seedlings

Grafting is one of the main techniques used in intensive tomato cultivation to address abnormal weather, diseases, insect pests, and continuous cropping problems. In recent years, due to agricultural labor constraints, the industry has needed to make use of more machinery. In this study, a clamping and cutting arrangement device for Solanaceae scion and stock seedlings was developed; it included a UR5 robotic arm to realize the automatic clamping and cutting of multiple seedlings, to facilitate the mechanized grafting of seedlings. The clamping success rate of eggplant and tomato seedlings using this device was 99%. When working with four seedlings in a single operation, the oblique-cutting success rates for eggplant and tomato seedlings were 97.76% and 94.55%, respectively. Moreover, 404 eggplant seedlings and 384 tomato seedlings could be worked with in 1 h. After the splicing and grafting process had been completed, the survival rate of the grafted seedlings was 85%. The simple device structure could be used by the industry to assist operators in clipping and cutting seedlings, reduce the complexity of grafting operations, shorten training times, address the problem of labor constraints in Taiwan’s agricultural industry, and improve product quality and efficiency.

Creation of automatic clamping mechanisms for spindle assemblies of machine tools using a formalized description of structural elements

The characteristics of the functioning of automatic mechanisms for clamping workpieces and cylindrical tools in the spindle assemblies of metalworking machines determine the potential for improving the productivity and quality of processing. The conducted research is aimed at developing new approaches to the creation of automatic clamping mechanisms with qualitatively new and necessary characteristics of their functioning. The formation of new characteristics is achieved by implementing appropriate changes at the structural level of an object. The results obtained provide better opportunities for the development of structures of automatic clamping mechanisms by improving the systematization of a review of an increased number of alternative options for their structural elements. This was achieved by solving the problem of formal description and representation of structural elements operating on the basis of various physical effects within one subject area of the systematization matrix. The results allow strengthening the heuristic potential in the design and involving an extended range of physical effects suitable for effective energy transfer and conversion in the operating conditions of automatic clamping mechanisms. The possibility of describing structural elements as digital codes helps to increase the efficiency of analysis and processing of information of the initial design stages. Using the codes of the selected structural elements, three sequences corresponding to the structures of automatic clamping mechanisms according to the brief descriptions [1.7–2.4]–(1.1–2.3); [1.7–2.6]–(1.1–2.3); [1.7–2.6+1.6/1.7–2.1]–(1.1–2.3) were compiled. On their basis, designs of automatic clamping mechanisms with predictably better characteristics and extended technological capabilities are developed

Clamping Fatigue Properties of Shrink-Fit Holder.

In order to explore the clamping fatigue properties of shrink-fit holders, ANSYS software was used in this study to analyze the thermal and contact stresses during the clamping process of the shrink-fit holder, and the fatigue analysis was performed by selecting the dangerous areas based on the two stresses. A numerical control shrink-fit holder clamping fatigue test device was manufactured, and the automatic clamping of the shrink-fit holder was executed in this study. After 500 clamping repetitions, a milling test was carried out on the shrink-fit bracket. By collecting the vibration signal of the workpiece during processing and measuring the change in the surface roughness of the workpiece, and then analyzing the change in the machining performance of the shrink-fit holder under different clamping times, we were able to compare and verify the accuracy of the finite element fatigue analysis.

Optimizing the Performance of an Automatic Clamping System for Gear-Shaping Machines

Gear shaping machine is used to manufacture both external and internal gears. It is a semi-automatic controlled machine in which all machining operations are carried out by automatically indexing, where loading and unloading of a work piece are performed manually. Also, the operator needs to wait for unloading, until the entire machining operation to be completed. Hence manufacturing cost is increased due to labor charges and overall machining time. Our proposed technique is to minimize the total cost of manufacturing, it is planned to eliminate the manual operation in loading and unloading of each component. Full automation of shaping machine requires storing device, a transfer device, automatic clamp device, and sequence controlling system. Full automation of shaping machine requires storing device, a transfer device, automatic clamp device, and sequence controlling system. The objective of this paperwork is to design a pneumatic clamping device needed for an automatic loading system, to hold the work piece the revolving table using Pro-E Wildfire software. Then calculate the clamping force theoretically for various pressure ranges and find the suitable working pressure. Also, static analysis of all designed components is performed to validate their strength using Ansys software. Based on the dimension, all parts are manufactured and assembled to test their performance.

A Method and Device for Automated Grinding of Small Ceramic Elements.

The paper describes an automated method for grinding small ceramic elements using a hyperboloid wheel. The problem of automating the process of machining elements made of nonmagnetic materials with a small area and low height has been solved. Automation of the grinding process was possible thanks to automatic clamping of workpieces in the machining zone and sequential processing by a specified number of grinding wheels. The workpieces were passed through successive machining zones. The division of the allowance of individual grinding wheels was made taking into account the characteristics of the workpieces and the requirements for the results of the machining. Obtaining a long grinding zone and the effect of automatic clamping of the workpieces was possible due to the inclination of the grinding wheel axis in relation to the plane of movement of the workpieces. Innovative aggregate grinding wheels were used for grinding. The aggregates containing diamond abrasive grains, connected with a metal bond, were embedded in the porous structure of the resin bond. The aggregates ensured high efficiency of grinding, and their developed surface contributed to good holding in the resin binder. The durability of grinding wheels was 64 h, which enables the machining of 76,000 ceramic elements.

Inertial piezoelectric linear motor driven by a single-phase harmonic wave with automatic clamping mechanism.

A novel, single-phase, harmonic-driven, inertial piezoelectric linear motor using an automatic clamping mechanism was designed, fabricated, and tested to reduce the sliding friction and simplify the drive mechanism and power supply control of the inertial motor. A piezoelectric bimorph and a flexible hinge were connected in series to form the automatic clamping mechanism. The automatic clamping mechanism was used as the driving and clamping elements. A dynamic simulation by Simulink was performed to prove the feasibility of the motor. The finite element method software COMSOL was used to design the structure of the motor. An experimental setup was built to validate the working principle and evaluate the performance of the motor. The prototype motor outputted a no-load velocity of 3.178 mm/s at a voltage of 220 Vp-p and a maximum traction force of 4.25 N under a preload force of 8 N. The minimum resolution of 1.14 μm was achieved at a driving frequency of 74 Hz, a driving voltage of 50 Vp-p, and a preload force of 0 N.

Design and Optimization Based on the Spindle of Automatic Clamping Lathe

The article discusses the cause and necessity of the window fillet radius of C1206C which is a kind of bearing ring automatic clamping lathe equipment. The static and modal performance were analyzed by finite element software ANSYS and an value range of the window fillet radius was put forward. The result of this work has an obvious guiding effect on promoting the performance of the product.

The Design of Workpiece Hydraulic Clamping System of a Special CNC Machine Tool for Guide Disc

This paper mainly describes and introduces the driving principle of hydraulic clamping system of a special CNC machine tool for guide disc and it also makes a meticulous description for how to do the design calculation and model selection to the key components of the hydraulic clamping system. The clamping mechanism can ensure the guide disc’s automatic clamping, making it safe, reliable and able to lower the labor intensity of the operators.

An In Vitro Evaluation of an Automatic Clamp for Use with Centrifugal Pumps

The risk of air emboli is a concern for all perfusionists. A new clamping device for use with centrifugal pumps is designed to clamp both the arterial and venous lines at the first indication of air or retrograde flow, thereby allowing the perfusionist to evaluate the situation and correct the problem before entraining air into the arterial pump head. After evaluating this device in our lab, we conclude that this new safety device should be added to the heart lung machine by all perfusionists using centrifugal pumps.

Automatic Modules for Extracorporeal Circulation Control

Maintenance of a constant level in the oxygenator during surgical extracorporeal circulation (ECC) is of paramount importance. We propose a device able to regulate the pump speed accordingly to the level in the oxygenator, and an automatic clamp to control venous return from the patient. The level regulator permits pump speed control and also stops the pump when a prefixed low level is reached (during ECC). Linearization of the level sensor has been made in order to optimize the PI regulator. Simulation results are presented and the regulator is evaluated in a clinical environment. The automatic clamp provides a good solution for reproducible and easy transitions in venous return. When coupled with the level regulator, the pump speed will increase automatically from zero to the correct equilibrium speed, with variable duration (from 30 seconds to 5 minutes) chosen by the operator. The same technique is used for stopping the ECC. These two devices are, in fact, modules, making up part of an evolutive device for ECC automation. The modules can exchange data with a supervising microcomputer.

Automatic Loading of Machining Systems and Automatic Clamping of Workpieces

For precise machining of workpieces the exactly positioned clamping of the workpiece is a fundamental presupposition. By increasing automation of the machining units it is necessary to automatize the workpiece handling as well as the clamping operations. This automation was nearly achieved in large batch production. Here you can see solutions which make it possible to transfer the automation of loading and clamping workpieces to the small batch and single-part production. An essential contribution for these operations are the numerically controlled clamping systems which are developed and constructed in the Institute for Machine Tool of the University of Stuttgart.

A TORSION‐MAGNETOMETER FOR MEASURING THE VERTICAL COMPONENT OF THE EARTH'S MAGNETIC FIELD*

AbstractThe paper describes a vertical component magnetometer for field work whose magnet system is provided with a torsion axis and in which torsion serves as a standard of measurement. When a measurement is taken the magnetic axis of the system is brought back into the horizontal position by altering the angle of twist (null‐method). The angle of twist is thus a direct measure of the vertical intensity. The instrument is within wide limits independent of the magnetic north‐south direction and may therefore be set up in practically any position. The magnet system is temperature compensated, well damped and provided with an automatic clamping device. With a scale value of 25 gammas per scale division the range of the instrument for direct measurements is 65000 gammas. A tripod of special design enables a measurement to be taken in about one minute. The weight of the torsion magnetometer inclusive of tripod is only 2.9 kg (6.4 lb).