JP2015131362A - Processing method and processing tool of work piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing method and a processing tool of a work piece reducing a period of time of a production cycle and improving productivity.SOLUTION: A processing tool 1 comprises: a plurality of brushes 3 and 3 rotationally driven so as to deburr a cutting work portion of a work piece; and a plurality of blades 4 and 4 rotationally driven together with individual ones of the plurality of brushes 3 and 3 so as to generate air flow toward the cutting work portion of the work piece. The processing tool 1 can blow off foreign substances after deburring the cutting work portion of the work piece by the air flow generated by the individual blades 4 and 4 being rotationally driven simultaneously when deburring the cutting work portion of the work piece by the individual brushes 3 and 3 being rotationally driven, and a deburring step and a foreign substance removal step independently and individually performed in the prior art can be consolidated into one step. Accordingly, a production cycle can be greatly reduced and productivity can be improved.

Description

  The present invention relates to a machining method and a machining tool for a workpiece after cutting.

  Generally, in a workpiece machining process, after performing a cutting process such as opening a hole in the workpiece, a deburring process is performed using a brush machining tool. After the deburring step, a foreign matter removing step is performed in which a cleaning liquid or the like is ejected from a spray nozzle to a cutting portion, for example, a hole portion that has been cut, to remove foreign matters such as chips.

  However, in the machining of workpieces with complicated shapes such as cylinder heads of engines such as automobiles, the burrs and chips remain as a result of the cutting process as described above because the product function quality and productivity decrease. Later, it is equipped with a deburring process and a foreign substance removal process (non-working process, that is, a process that does not add value to the product), and these deburring process and foreign substance removal process account for about 70% of the production cycle. In order to occupy, the investment efficiency of the facilities was deteriorated.

  Specifically, particularly in the foreign matter removing process, the spray nozzle is sequentially moved to a plurality of cutting parts of the workpiece, the cleaning liquid from the spray nozzle is sequentially jetted to each cutting part, and the foreign matter at each cutting part is removed. If there are many cutting parts in a workpiece having a complicated shape like the cylinder head described above, it takes a very long time to move the injection nozzle to each cutting part in order to reduce the efficiency. It was. Moreover, in this conventional method, it is necessary to increase the positional accuracy when moving the injection nozzle to the cutting part after deburring the workpiece, that is, it is necessary to increase the accuracy of teaching related to the movement of the injection nozzle. As a result, the moving distance of the injection nozzle becomes longer and the efficiency is further deteriorated.

  Therefore, in Patent Document 1, a cutting tool that holds a cutting tool that processes a workpiece and is attached to an outer peripheral portion of the cutting tool is attached to a chip removal tool that is used in a machine tool that includes a spindle that rotates the cutting tool. The cutting exclusion tool which provided the some blade | wing which rotates with rotation of this is disclosed.

JP 2011-110614 A

  However, in the invention according to Patent Document 1, in view of the problem that chips generated during the cutting process enter between the cutting tool and the workpiece to deteriorate the cutting condition, the chips generated during the cutting process by the cutting tool are bladed. The above-mentioned problem cannot be solved. Moreover, in the invention according to Patent Document 1, the cutting tool is provided with blades. However, when such a configuration is actually employed, an air flow is generated around the cutting tool, and therefore the cutting tool is driven to rotate. An abnormal vibration is generated in the inside, and the cutting accuracy is greatly deteriorated. As a result, the cutting tool may be damaged, which is unrealistic.

  This invention is made | formed in view of this point, and it aims at providing the processing method and processing tool of the workpiece | work which shortens the time of a production cycle and improves productivity.

In order to solve the above-mentioned problems, an invention relating to a method for processing a workpiece according to the present invention includes a brush for rotationally driving and a blade for rotationally driving together with the brush after a cutting process, and a deburring process and a foreign matter removing process. It is characterized by carrying out at the same time using the provided processing tool.
Further, in the invention related to the workpiece machining tool of the present invention, the machining tool is configured such that, after the workpiece is cut, a brush that rotates to deburr the cut portion and an air flow toward the cut portion. In order to generate, it is characterized by including a blade which rotates together with the brush.
Thereby, the time of the production cycle of a workpiece | work can be shortened and productivity can be improved.

  Various aspects of the workpiece machining method and machining tool according to the present invention and their functions will be described in detail in the following aspects of the invention.

(Aspect of the Invention)
In the following, some aspects of the invention that can be claimed in the present application (hereinafter sometimes referred to as “claimable invention”) will be exemplified and described. In addition, each aspect is divided into a term like a claim, it attaches | subjects a number to each term, and is described in the format which quotes another term as needed. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description, embodiments, etc. accompanying each section, and as long as the interpretation is followed, there may be embodiments in which other constituent elements are added to the aspects of each section. In addition, an aspect in which the constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention.

(1) A workpiece machining method comprising a workpiece cutting step, a deburring step, and a foreign matter removing step, wherein the deburring step and the foreign matter removing step are rotated after the cutting step. A work machining method characterized in that it is performed simultaneously using a machining tool provided with a brush to be driven and blades that are rotationally driven together with the brush (corresponding to the invention of claim 1).
In the workpiece machining method of (1), the deburring step and the foreign matter removal step are performed simultaneously after the cutting step, so that the time required for the foreign matter removal step that has been carried out independently until now becomes unnecessary, and the production cycle is reduced. It can be greatly shortened. In addition, since the deburring step and the foreign matter removing step are performed with the same processing tool provided with the rotationally driven brush and the blade that is rotationally driven together with the brush, the cost of equipment investment can be reduced.

(2) A work tool for a workpiece, and the work tool generates a flow of air toward the cutting portion after the workpiece is cut and a brush that is rotationally driven to deburr the cutting portion. Accordingly, a workpiece machining tool comprising blades that rotate together with the brush (corresponding to the invention of claim 2).
In the workpiece machining tool of item (2), burrs at the workpiece cutting site are removed by rotating the brush, and at the same time, foreign matter at the workpiece machining site, that is, burrs, is generated by the air flow generated by the blade rotation drive. Chips and coolant after removal can be blown away.

(3) The work tool according to (2), wherein the brush and the blade are connected to the same rotation shaft (corresponding to the invention of claim 3).
In the workpiece machining tool of the item (3), since the rotational drive from the same rotation shaft is transmitted to the brush and the blade, the structure of the machining tool can be simplified.

(4) The workpiece machining tool according to (2) or (3), wherein an outer diameter of the rotating track of the blade is larger than an outer diameter of the rotating track of the brush.
In the workpiece machining tool of the item (4), the air flow can be generated toward a wider area than the area to be deburred by the brush, and the blade is driven to rotate, and the workpiece machining tool can be used in a wide range with reference to the workpiece machining site. Foreign matter can be removed.

(5) A plurality of the brushes are provided around the rotation axis at intervals in the circumferential direction, a plurality of the blades are provided, and each blade extends radially between the adjacent brushes (3) Item machining tool according to item or (4).
In the apparatus of (5), space can be effectively utilized.

  According to the present invention, it is possible to provide a workpiece machining method and a machining tool that shorten the production cycle time and improve productivity.

FIG. 1 is a schematic cross-sectional view of a processing tool according to an embodiment of the present invention. FIG. 2 is a plan view of the brush holder of the present processing tool. FIG. 3 is a top view in which the end portion of each blade is fixed on the guide member with the present processing tool. FIG. 4 is a side view in which the end portion of each blade is fixed on the guide member with the present processing tool. FIG. 5 is a perspective view of the machining tool.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 1, 3, and 4, a workpiece machining tool 1 according to an embodiment of the present invention is connected to a rotary shaft 2, and a plurality of workpiece machining tools 1 are circumferentially spaced around the rotary shaft 2. A brush 3 provided and a plurality of blades 4 connected to the rotary shaft 2 are provided. The brush 3 is formed in a cylindrical shape having a predetermined length.

  As shown in FIG. 1, the rotating shaft 2 is fixed to the main holder 5. The rotating shaft 2 can adjust the amount of protrusion from the main holder 5. The main holder 5 is connected to a main shaft of a machining center, for example. When the main holder 5 is driven to rotate by the rotation of the main shaft, the rotary shaft 2 is driven to rotate around the axis. A brush holder 10 is connected to the base of the rotary shaft 2 on the main holder 5 side so as not to be relatively rotatable. As shown in FIG. 2, the brush holder 10 is formed in a substantially disc shape. An insertion hole 11 is provided at the radial center of the brush holder 10. The rotary shaft 2 is connected to the insertion hole 11 so as not to be relatively rotatable. A plurality of holding recesses 12 are provided around the insertion hole 11 on one surface of the brush holder 10 at intervals in the circumferential direction. In the present embodiment, four holding recesses 12 are provided. Each holding recess 12 is formed in a circular shape in plan view. Each holding recess 12 has an inner diameter that can hold the brush 3, and one end of each brush 3 is held.

  As shown in FIGS. 1 and 3, a guide member 13 for holding the posture of each brush 3, 3 is fixed to the tip surface of the rotating shaft 2 by a plurality of bolts 6, 6. In this embodiment, two bolts 6 and 6 are used. The guide member 13 is formed in a substantially rectangular plate shape in plan view, and a substantially central portion in the longitudinal direction of the guide member 13 is fixed to the distal end surface of the rotating shaft 2 by bolts 6 and 6. Circular guide holes 14 and 14 are formed at both ends in the longitudinal direction of the guide member 13, respectively. Each guide hole 14, 14 has an inner diameter that allows each brush 3 to be inserted. When the guide member 13 and the brush holder 10 are connected to the rotary shaft 2, the guide holes 14 and 14 of the guide member 13 and the two holding recesses 12 and 12 of the brush holder 10 overlap in the axial direction. A spring 15 is arranged around the rotation shaft 2 between the guide member 13 and the brush holder 10. The spring 15 biases the guide member 13 and the brush holder 10 away from each other. Assembling backlash of the rotating shaft 2, the brush holder 10 and the guide member 13 is absorbed by the urging force of the spring 15.

  As shown in FIGS. 3 to 5, a pair of blades 4 and 4 are fixed on the guide member 13 so as to be along the radial direction. The pair of blades 4, 4 are arranged in a direction that is 90 ° different from the direction in which the guide member 13 extends. The end portions of the blades 4 and 4 are fixed to the both ends in the short direction between the guide holes 14 and 14 on the guide member 13 by the pressing members 17 and 17, respectively. Specifically, the pin member 16 is inserted into the groove portion 8 provided at the end of the blade 4, and the pin member 16 is sandwiched between the upper surface of the guide member 13 and the pressing member 17, so that the pressing member 17. Is fixed to the guide member 13 with bolts 9 and 9. As a result, the end portions of the blades 4 and 4 are fixed on the guide member 13 by the pressing members 17 and 17, respectively. In addition, the method of fixing the edge part of each blade | wing 4 and 4 on the guide member 13 is not restricted to this, You may employ | adopt another method.

  Then, one end of each brush 3, 3 is held in each holding recess 12, 12 of the brush holder 10 that overlaps with each guide hole 14, 14 in the guide member 13 in the axial direction, and each brush 3, 3 is held in the guide member 13. Each of the guide holes 14 and 14 is inserted into a machining tool 1. Subsequently, the main holder 5 of the machining tool 1 is connected to a main shaft of a machining center (not shown), and the main holder 5 is rotated. Thereby, the rotating shaft 2 of the machining tool 1 rotates around the axis, the brushes 3 and 3 rotate around the rotating shaft 2, and the blades 4 and 4 rotate around the rotating shaft 2. . Therefore, in the present machining tool 1, the distance from the radial center of the rotating shaft 2 to the tip of each blade 4, 4 is longer than the distance from the radial center of the rotating shaft 2 to the farthest outer peripheral surface of each brush 3. . As a result, the outer diameter of the rotating track of each blade 4, 4 becomes larger than the outer diameter of the rotating track of each brush 3. In this embodiment, a pair of brushes 3 and 3 are provided along the radial direction, and a pair of blades 4 and 4 are provided along the radial direction at positions different from each brush 3 by 90 °. Three or more brushes 3 may be provided around the rotation shaft 2 and three or more blades 4 may be provided.

  When the above-described machining tool 1 is used to deburr the cutting part of the workpiece after the cutting process, the main holder 5 of the machining tool 1 is connected to the spindle of the machining center, and the spindle is Based on teaching input in advance to the machining center, the workpiece moves to the cutting part. Note that the position accuracy (teaching accuracy) of the machining tool 1 relative to the workpiece cutting site at this time does not need to be higher than the position accuracy (teaching accuracy) of the injection nozzle in the conventional foreign matter removal process. Subsequently, by rotating the main holder 5, the rotating shaft 2 of the present processing tool 1 rotates around the axis, and each brush 3 rotates around the rotating shaft 2, and each blade 4, 4 is Rotate around the rotation axis 2.

  As a result, the deburring of the cutting part of the workpiece is performed by the rotational drive of each brush 3, and at the same time, an air flow is generated toward the cutting part of the work by the rotational driving of each blade 4, 4. The flow can blow off foreign matter at the cutting site, that is, chips and coolant. In addition, the outer diameter of the rotating track of each blade 4, 4 is larger than the outer diameter of the rotating track of each brush 3, and an air flow can be generated toward a wider area than the area deburred by each brush 3. Therefore, chips and coolant can be blown off reliably over a wide range of the workpiece cutting site and its periphery. And when there are a plurality of cutting parts of a work, the above-mentioned operation is repeated sequentially corresponding to each cutting part of a work.

  As described above, according to the machining tool 1 according to the embodiment of the present invention, deburring of the cutting part of the workpiece is performed by the rotation drive of each brush 3, and at the same time, it is generated by the rotation drive of each blade 4, 4. Foreign matter after deburring of the cutting part of the workpiece, that is, chips and coolant can be blown off by the air flow. As a result, the deburring process and the foreign substance removal process, which have been performed individually until now, can be consolidated into one process, the production cycle can be greatly shortened, and the productivity can be improved. .

  Further, in the conventional foreign matter removing process, it is necessary to increase the position accuracy (teaching accuracy) when the spray nozzle is moved to the cutting portion after the deburring of the workpiece, but the main processing tool 1 in the present embodiment. The position accuracy (teaching accuracy) of the workpiece with respect to the cutting portion of the workpiece conforms to the position accuracy at the time of deburring by the rotation drive of each brush 3, so that the position accuracy of the cutting tool 1 to the cutting portion is the same as that of the conventional foreign matter removal. The position accuracy of the injection nozzle in the process can be lowered, and particularly when there are many cutting parts in a workpiece having a complicated shape, the moving distance of the machining tool 1 can be minimized. Time reduction can be realized.

  Moreover, in the conventional foreign matter removing step, the cleaning liquid is sprayed from the spray nozzle to the cutting part after the deburring of the workpiece to remove the foreign matter. However, in the present processing tool 1, the brushes 3 and 3 are driven to rotate. For this purpose, the blades 4 and 4 are connected to the rotary shaft 2 necessary for generating the air flow, and the air flow is generated by the rotational drive. Since no cleaning liquid pumping device or the like is required, the cost required for capital investment can be reduced.

  In the present embodiment, the brush holder 10 is formed in a disk shape, and a plurality of holding recesses 12 for holding the brush 3 are formed on one surface thereof, although not shown, the brush holder 10 is rotated. Each holding arm portion is composed of a plate-like base portion fixed to the tip surface of the shaft 2 and a plurality of, for example, four holding arm portions extending radially from the outer periphery of the base portion at a 90 ° pitch in the circumferential direction. A holding recess 12 for holding the brush 3 may be formed at the tip of each, and a plurality of, for example, four blades 4 extending radially between adjacent holding arm portions may be provided.

  1 processing tool, 2 rotating shaft, 3 brushes, 4 blades

Claims (3)

A workpiece machining method comprising a workpiece cutting process, a deburring process, and a foreign matter removing process,
After the cutting step, the deburring step and the foreign matter removing step are simultaneously performed using a processing tool including a rotationally driven brush and a blade that is rotationally driven together with the brush. Processing method. A workpiece machining tool,
The machining tool includes a brush that is rotationally driven to deburr the cutting part after cutting the workpiece, and a blade that is rotationally driven together with the brush to generate an air flow toward the cutting part. A workpiece processing tool characterized by comprising:   The workpiece machining tool according to claim 2, wherein the brush and the blade are respectively connected to the same rotation shaft.

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