Machining apparatus and deburring device

Patent metadata

Field	Value
Publication number	US-9339872-B2
Application number	US-201414421009-A
Country	US
Kind code	B2
Filing date	Feb 19, 2014
Priority date	Feb 19, 2014
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A pair of pinching members pinching a workpiece stem portion, and a deburring tool performing deburring onto the workpiece stem portion pinched by the pair of pinching members are disposed under a pair of guide rails. The deburring tool has a recess so that an opening of the recess faces the other end face of the workpiece stem portion, and is capable of a displacement motion in an axis extension direction of the recess while rotating around the recess axis, and a recess inner circumferential surface is formed so as to reduce its diameter as it goes from the recess opening side toward a recess internal side, and a blade portion is provided on the recess inner circumferential surface. Thereby, it is possible to perform deburring without increasing the machining line length, and prevent abnormal wear of a rubbing stone due to the deburring.

First claim

The invention claimed is:

1. A machining apparatus, on condition that a machining object has a stem portion and an expanded diameter portion which is integrated with one end side of the stem portion, so as to expand its diameter larger than the stem portion, comprising:
a cutting device that cuts the stem portion of the machining object;
a grinding device that grinds the stem portion of the machining object; and
a pair of carrier members which are disposed so as to extend with a space between the cutting device and the grinding device, the pair of carrier members carry the machining object from the cutting device to the grinding device,
and in which, when the pair of carrier members carry the machining object, the expanded diameter portion of the machining object is made to stride over the pair of carrier members, and the stem portion of the machining object is suspended downward from between the pair of carrier members, the apparatus wherein
a pair of pinching members which pinch the stem portion of the machining object when the machining object is carried to a predetermined machining position on the pair of carrier members, and a deburring tool which is disposed lower than the pair of pinching members, to perform deburring with respect to the stem portion of the machining object pinched by the pair of pinching members are disposed under the pair of carrier members,
the deburring tool has a recess for insertion of the stem portion of the machining object pinched by the pair of pinching members so that an opening of the recess faces the other end face of the stem portion of the machining object, and is capable of a displacement motion in an axis extension direction of the recess while rotating around an axis of the recess,
an inner circumferential surface of the recess in the deburring tool is formed so as to reduce its diameter as an inner diameter of the recess partitioned by the inner circumferential surface of the recess goes from an opening side of the recess toward an internal side of the recess, and
a deburring machining section for performing deburring is provided on the inner circumferential surface of the recess.

2. The machining apparatus according to claim 1 , wherein
the pair of pinching members are provided so as to be capable of a displacement motion in a displacement motion direction of the deburring tool, and
biasing means is associated with the pair of pinching members so as to increase repulsion force as the pair of pinching members approach the pair of carrier members.

3. The machining apparatus according to claim 2 further comprising:
displacement motion detecting means for detecting a displacement motion of the pair of pinching members; and
control means for controlling the deburring tool to stop deburring machining with respect to the stem portion of the machining object pinched by the pair of pinching members when it is detected that the pair of pinching members make a displacement motion from a reference position at which external force for making a displacement motion is not applied, to a predetermined displacement motion position based on information from the displacement motion detecting means.

4. The machining apparatus according to claim 1 further comprising:
a first stopper which is capable of selecting a movement restriction mode of restricting the machining object at a predetermined machining position on the pair of carrier members from moving from the predetermined machining position to a carrying downstream side, and a movement allowable mode of releasing the movement restriction mode to allow the machining object to move, and which switches to the movement allowable mode when the pair of pinching members pinch (hold) the stem portion of the machining object at the predetermined machining position, and switches to the movement restriction mode when the pair of pinching members release pinching (holding) of the stem portion of the machining object at the predetermined machining position, and
a second stopper which restricts a movement of the machining object at a predetermined standby position on a carrying upstream side from the predetermined machining position on the pair of carrier members, and on the other hand, when the first stopper selects the movement restriction mode, releases only the movement restriction on a front machining object among machining objects on the carrying upstream side from the predetermined standby position, to move the front machining object toward the first stopper.

5. The machining apparatus according to claim 4 , wherein
the pair of carrier members are set as a pair of guide rails so that its height position becomes higher as it goes toward the carrying upstream side, and a machining object carried by the pair of carrier members slides on the pair of carrier members under its own weight.

6. The machining apparatus according to claim 5 , wherein
the first stopper is set so as to enter a moving region of the stem portion of the machining object when the first stopper selects the movement restriction mode, and exit from the moving region of the stem portion of the machining object when the first stopper selects the movement allowable mode.

7. The machining apparatus according to claim 6 , wherein
an attachment substrate having a through-hole is provided so as to be capable of adjusting a tilting motion in a standing state,
the attachment substrate is disposed so that the pair of carrier members and a machining object carried by the pair of carrier members pass through the through-hole between the cutting device and the grinding device,
the deburring tool is attached to the attachment substrate via deburring tool driving means for causing the deburring tool to make a displacement motion,
the pair of pinching members are provided on the attachment substrate on the upper side of the deburring tool, and
the attachment substrate is tilted so that the opening of the recess in the deburring tool faces the other end face of the stem portion of the machining object restricted from moving by the first stopper by adjusting a tilting motion.

8. The machining apparatus according to claim 7 , wherein
the pair of pinching members are attached to the attachment substrate so as to be capable of a displacement motion in an axis extension direction of the deburring tool, and
the biasing means is interposed between the pair of pinching members and the attachment substrate so as to increase repulsion force as the pair of pinching members approach the pair of carrier members.

9. The machining apparatus according to claim 4 further comprising:
pinching state detecting means for detecting a pinching state of the pair of pinching members with respect to the stem portion of the machining object at the predetermined machining position;
first stopper mode change detecting means for detecting a mode change of the first stopper; and
control means for switching the first stopper to the movement restriction mode when it is judged that pinching with respect to the stem portion of the machining object at the predetermined machining position is released to carry out the machining object based on information from the pinching state detecting means, and for controlling the second stopper to release the movement restriction on the front machining object among machining objects on the carrying upstream side from the predetermined standby position when it is judged that the mode of the first stopper is changed to the movement restriction mode based on information from the first stopper mode change detecting means.

10. The machining apparatus according to claim 9 further comprising machining object detecting means for detecting whether or not there is a machining

Assignees

• Nittan Valva

Inventors

• Zenke Atsushi
• Oishi Yasunori

Classifications

• B24B5/22

  for grinding cylindrical surfaces, e.g. on bolts · CPC title

• B23B2215/24

  Components of internal combustion engines (B23B2215/16 and B23B2215/20 take precedence) · CPC title

• B24B5/04

  for grinding cylindrical surfaces externally (grinding combined cylindrical and conical surfaces B24B5/14) · CPC title

• B23B5/167 Primary

  Tools for chamfering the ends of bars or tubes · CPC title

• B24B9/002

  for travelling workpieces · CPC title