The present invention relates to a surface defect inspection device and method. The surface defect inspection device for inspection during transport of an object to be inspected, of the present invention, may comprise: a transporter for providing, to a conveyor roller, the object to be inspected; a laser inspection unit for generating an electrical signal about a surface condition of the object to be inspected through laser emission on at least one surface of the object to be inspected and reflected wave reception while the object to be inspected is transported in the longitudinal direction on the conveyor roller and passes through an inspection area; and a control device, which analyzes the electrical signal about the surface condition of the object to be inspected, so as to determine whether the object to be inspected is suitable or unsuitable.
Provided are a hollow drive shaft using an upsetting method and a method of manufacturing the same, in which hot forging and upsetting processes are applied to both ends of a workpiece so that an outer diameter at both ends of the workpiece is greater than an outer diameter of a middle part of the workpiece, thereby reducing a weight of the drive shaft and enabling the drive shaft to transmit higher driving power. According to the present invention, the upsetting process is applied during the hot forging process to manufacture the hollow drive shaft, portions to be substantially processed are limited to portions at both ends of the workpiece, and the number of upsetting processes is limited to a minimum number (2 or the like), such that initial investment costs and manufacturing costs are low because the number of processes is small.
The present invention relates to a drive shaft for an automobile, and an apparatus and method for manufacturing same. The apparatus for manufacturing the drive shaft for an automobile according to the present invention may comprise: a clamping unit which fixes the central portion of a material and exposes both locally heated ends; tube compression dies which are arranged on both sides of the clamping unit and can move forward and backward with respect to the clamping unit, the tube compression dies being provided with holes that pass through in the axial direction of the material and have a first entrance part in the direction of the clamping unit and a second entrance part on the opposite side from the clamping unit; and mandrels arranged on both sides of the tube compression dies and capable of moving forward and backward via the second entrance parts of the holes of the tube compression dies.
B21J 5/02 - Die forging; Trimming by making use of special dies
B21K 1/06 - Making machine elements axles or shafts
B60K 17/22 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
4.
Hollow drive shaft using upsetting method and manufacturing method therefor
Provided are a hollow drive shaft using an upsetting method and a method of manufacturing the same, in which hot forging and upsetting processes are applied to both ends of a workpiece so that an outer diameter at both ends of the workpiece is greater than an outer diameter of a middle part of the workpiece, thereby reducing a weight of the drive shaft and enabling the drive shaft to transmit higher driving power. According to the present invention, the upsetting process is applied during the hot forging process to manufacture the hollow drive shaft, portions to be substantially processed are limited to portions at both ends of the workpiece, and the number of upsetting processes is limited to a minimum number (2 or the like), such that initial investment costs and manufacturing costs are low because the number of processes is small.
A hollow drive shaft using an upsetting method and a manufacturing method therefor apply hot forging and an upsetting method to both ends of a workpiece to upset the outer diameter of both ends of the workpiece to be larger than the outer diameter of the middle part of the workpiece, such that a drive shaft can be reduced in weight and a greater drive force can be transmitted. As the present invention applies an upsetting method in hot forging during the manufacture of a hollow drive shaft, portions to be actually processed are limited to both ends of the workpiece, and the finishing number of upsets is a minimum number of times (such as two times), such that the initial investment cost and manufacturing costs are low due to the small number of processes. Moreover, since the hollow drive shaft is manufactured by the upsetting method rather than a swaging method, manufacturing costs are reduced and performance of the drive shaft is improved.
There is provided a method of fabricating an injector cup unit for connecting a fuel injection pipe, which includes providing a steel bar in which parent bodies of injector cups and parent bodies of injector holders, integrally formed with the parent bodies of the injector cups, are continuously connected in a longitudinal direction thereof, cutting the steel bar to a preset length to fabricate the parent body of the injector cup and the parent body of the injector holder, and processing the parent body of the injector cup and the parent body of the injector holder to fabricate the injector cup and the injector holder integrally formed with the injector cup.
An apparatus for forming a gear part according to the present invention comprises: a main body frame; a material installation member movably installed in the main body frame, and having a material for forming a gear part provided therein; a gear part forming unit disposed on a moving path of the material installation member and detachably provided with a driving roll having a gear part forming member for forming a gear part on the material; and a guide part which is provided at the main body frame to be arranged at a front end and a rear end of the gear part forming unit, and which guides the material installation member.
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