JP2022095164A - Burr removing device - Google Patents

Abstract

To suppress the occurrence of burrs which are not completely removed and left.SOLUTION: Disclosed is a burr removing device comprising: a rotary shaft; a tip blade which is provided at the tip of the rotary shaft so as to be expandable in the radial direction of the rotary shaft, and has a drilling blade for drilling a burr of a work upon advancing to the work, and a cutting blade for cutting a return burr associated with the drilling, where the drilling blade is expanded in the radial direction of the rotary shaft by a reaction force received from the burr of the work upon advancing; an expansion mechanism which is provided at the tip of the rotary shaft and extends the drilling blade in the radial direction of the rotary shaft to bring the cutting blade into contact with the return burr; and a rotation mechanism which rotates the cutting blade by rotating the rotary shaft when bringing the cutting blade into contact with the return burr.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a deburring device.

It is preferable to remove burrs generated in processed products manufactured by various manufacturing methods such as die casting. In particular, burrs generated in the through holes provided in the processed product, when the through holes are provided for inserting parts such as bolts, hinder the insertion of the parts or bite when the parts are inserted. Since it may cause various problems such as, it is required to be removed in advance.

For example, Patent Document 1 discloses an example of a method for removing burrs contained in through holes of a processed product. In this removal method, a reamer having a twisted blade formed in a through hole of a processed product is inserted while rotating, so that a burr formed in the through hole is raised in the direction in which the reamer is inserted, and the reamer is generated by the insertion. The burrs are cut off with a twisted blade.

Japanese Unexamined Patent Publication No. 2014-117733

However, in the method of Patent Document 1, it is possible to remove the portion of the generated burr on the inner peripheral side of the diameter of the through hole, but it is difficult to remove the portion on the outer peripheral side of the diameter of the through hole. There is a problem that it may not be completely removed and may remain.

The present disclosure can be realized in the following forms.

(1) According to one embodiment of the present disclosure, a deburring device is provided. This deburring device is a rotary shaft and a tip blade that is extensible in the radial direction of the rotary shaft at the tip of the rotary shaft, and burrs on the work target when advancing to the work target. It has a drilling blade for drilling and a cutting blade for cutting return burrs due to drilling, and the drilling blade receives a reaction force from the burrs of the object to be machined as it progresses, and the drilling blade is radially in the rotation axis. An expansion mechanism provided at the tip of the rotary shaft, the drilling blade is expanded in the radial direction of the rotary shaft, and the cutting blade is brought into contact with the return burr. It is provided with a rotation mechanism for rotating the cutting blade by rotating the rotation shaft when the cutting blade is brought into contact with the return burr.
According to this form of the burr removing device, when the burr of the object to be processed is removed, it is possible to suppress the generation of burrs that cannot be completely removed and remain. Further, since the drilling blade can be expanded in the radial direction of the rotation shaft according to the diameter of the hole having the burr to be drilled, one burr removing device can remove the burr having in various holes having different diameters. be able to.

The present disclosure can be realized not only in the above-mentioned form of the deburring device but also in various forms such as a chamfering machine.

It is explanatory drawing which shows schematic cross section of the burr removal apparatus as one Embodiment. It is 1st explanatory drawing which shows the deburring by a deburring apparatus. It is a 2nd explanatory drawing which shows the deburring by a deburring apparatus. It is a 3rd explanatory diagram which shows the deburring by a deburring apparatus. FIG. 4 is a fourth explanatory diagram showing deburring by a deburring device. It is explanatory drawing which shows the chamfering processing by a deburring apparatus.

A. Embodiment:
FIG. 1 is an explanatory diagram schematically showing a cross section of a deburring device as an embodiment. In addition, in FIG. 1, a part of the configuration of the deburring device 10 is schematically shown not in a cross section with hatching but in order to facilitate the illustration. In the following, the deburring by the deburring device 10 will be described with the processed product 20 shown in FIG. 1 as the object to be processed. The processed product 20 is a processed product produced by die casting. The processed product 20 has a through hole 23 formed between one surface 21 and the other surface 22. However, at the end of the through hole 23 on one surface 21 side, there is a burr 24 formed so as to partially or completely close the opening of the through hole 23. When the burr 24 completely closes the opening of the through hole 23, the through hole 23 is not actually a through hole, but is a hole that is made a through hole by removing the burr 24, so that the through hole 23 is closed. It is referred to as a through hole regardless of whether or not it is present. In the following, as shown in FIG. 1, the processed product 20 will be described as being arranged so that the side of one surface 21 faces downward and the other surface 22 faces upward. Further, one surface 21 is also referred to as "lower surface 21", and the other surface 22 is also referred to as "upper surface 22".

The burr removing device 10 is a burr removing device based on a press working method for removing burrs by drilling burrs in through holes. The deburring device 10 is located on the side of the upper surface 22 of the processed product 20, that is, on the side of the first press portion 100 arranged above the processed product 20, and on the side of the lower surface 21 of the processed product 20, that is, below the processed product 20. A second press unit 200 to be arranged is provided.

The second press unit 200 includes a second press mold 210 and a backing seat 220 provided on the surface 211 (hereinafter, also referred to as “upper surface 211”) of the second press mold 210 on the side of the processed product 20. The padding seat 220 is arranged below the through hole 23 so that its central axis coincides with the central axis CX of the through hole 23 to be deburred. The second press mold 210 is arranged so that the distance between the surface 221 on the processed product 20 side of the backing seat 220 (hereinafter, also referred to as “upper surface 221”) and the lower surface 21 of the processed product 20 is a predetermined distance Si. Will be done. The distance Si between the upper surface 221 of the backing seat 220 and the lower surface 21 of the processed product 20 will be described later.

The first press portion 100 is arranged above the through hole 23 so that its central axis coincides with the central axis CX of the through hole 23 to be deburred. Since the central axis of the first press section 100 and the central axis of the backing seat 220 of the second press section 200 are arranged so as to coincide with the central axis CX, in the following description, for convenience, the first press section 100 The central axis of the center axis and the central axis of the backing seat 220 of the second press portion 200 will be described as "central axis CX". Further, the direction along the central axis CX will be described as "axial direction Dcx", the direction along the diameter of the through hole 23 will be described as "diametrical direction Dd", and the circumferential direction centered on the central axis CX will be described as "circumferential direction Rcx". ..

The first press portion 100 is a main component for punching burrs in the through hole, and includes a first press mold 110, a dog 120, a tip blade support 130, a tip blade 140, and a spring 150. ..

The first press mold 110 has a columnar structure with the central axis CX as the central axis. The first press die 110 has a first groove 112 and a second groove 113 provided in order from the surface 111 on the side of the processed product 20 (hereinafter, also referred to as “lower surface 111”) along the central axis CX. There is. The first groove 112 has a cylindrical shape centered on the central axis CX, and the second groove 113 has a diameter smaller than that of the first groove 112 and has a cylindrical shape centered on the central axis CX.

The dog 120 has a dog plate 121 and a dog shaft 122 along the axial direction Dcx at the center of the dog plate 121 with the central axis CX as the central axis. The shaft end portion 123 on the side opposite to the dog plate 121 of the dog shaft 122 (hereinafter, also referred to as “tip side shaft end portion 123”) is a portion inserted into the second groove 113 of the first press mold 110. , Is connected to the bottom of the second groove 113 via a spring 150. The shaft end portion 123 on the distal end side can reciprocate in the first groove 112 along the axial Dcx according to the relationship between the force applied to the dog plate 121 and the force applied from the spring 150 to the dog shaft 122. However, on the side surface of the shaft end portion 123 on the distal end side, a pair of keys 126 projecting outward in the radial direction Dd are provided line-symmetrically with respect to the central axis CX. The pair of keys 126 are arranged in the guide groove 114 provided along the axial direction Dcx at a position line-symmetrical with respect to the central axis CX of the inner wall of the second groove 113. As a result, the rotation of the shaft end portion 123 on the distal end side along the circumferential direction Rcx about the central shaft CX is restricted. That is, the dog 120 is in a state where it cannot rotate along the circumferential direction Rcx, and can reciprocate along the axial direction Dcx according to the relationship of the force applied to the dog 120. Further, a male screw 125 constituting a rotation mechanism described later is provided on the side surface of the shaft end portion 124 (hereinafter, also referred to as “root side shaft end portion 124”) on the dog plate 121 side of the dog shaft 122. ..

The tip blade support 130 has a substantially cylindrical shape centered on the central axis CX so that it can be arranged in the first groove 112 of the first press mold 110, and the dog axis 122 of the dog 120 can be inserted through the tip blade support 130. It has a central through hole 132 with the central axis CX as the central axis. The tip blade support 130 is rotatably arranged in the first groove 112 via the bearing 162. The dog shaft 122 of the dog 120 is inserted through the central through hole 132 via the bush 163. Therefore, the tip blade support 130 is rotatable about the central axis CX with respect to the first groove 112 and the dog shaft 122 of the first press mold 110.

A pair of support portions 134 arranged at equal intervals along the circumferential direction Rcx are provided at the end portion on the tip end side opposite to the side inserted into the first groove 112 of the tip blade support 130. .. The pair of support portions 134 rotatably support the tip blade 140 by a support shaft cy orthogonal to the axial direction Dcx and the radial direction Dd, respectively. The pair of tip blades 140 supported by the tip blade support 130 can rotate with the rotation of the tip blade support 130, that is, along the circumferential direction Rcx with the tip blade support 130 as the rotation axis. A female screw 136 to be screwed with the male screw 125 of the dog shaft 122 is provided on the inner wall surface of the end portion of the central through hole 132 on the support portion 134 side of the tip blade support 130. The male screw 125 and the female screw 136 form a screw mechanism.

The tip blade 140 has a drilling blade 142 which is a pressing portion for pressing and drilling the burr 24, and the drilling blade 142 is supported by a support shaft cy at an end portion 144 opposite to the drilling blade 142. It is rotatably supported with respect to the portion 134. Further, the tip blade 140 has a cutting blade 148 for cutting the burr 24 formed on the outer surface 146. The direction of the cutting blade 148 is orthogonal to the axial direction Dcx of the through hole 23 and the radial direction Dd of the through hole 23.

A support portion SM for supporting the first press mold 110 is provided on the surface 116 (hereinafter, also referred to as “upper surface 116”) opposite to the lower surface 111 of the first press mold 110. The support portion SM is connected to a drive portion (not shown). The drive unit reciprocates the first press unit 100 including the first press mold 110 supported by the support unit SM along the axial direction Dcx.

In the deburring device 10 described above, as described below, the first press portion 100 arranged above the through hole 23 of the processed product 20 to be deburred presses the deburring 24 to punch out, and further. By pressing the backing seat 220 of the second press portion 200, the burr 24 at the end of the through hole 23 of the processed product 20 on the lower surface 21 side can be removed.

2 to 5 are 1st explanatory view to 4th explanatory view showing deburring by the burr removing device 10.

As shown in FIG. 2, in the process of advancing the first press portion 100 (see FIG. 1) arranged above the through hole 23 to be deburred downward toward the backing seat 220 of the second press portion 200. When the drilling blade 142 of the tip blade 140 comes into contact with the burr 24, the drilling blade 142 presses the burr 24 with a downward pressing force Fp along the axial Dcx according to the driving force for the downward movement. The magnitude of the pressing force Fp according to the driving force of the first pressing unit 100 is set so as to be a value that can be drilled in the burr 24.

At this time, the drilling blade 142 that presses the burr 24 comes into contact with the burr 24 until it comes into contact with the inner wall 25 of the through hole 23 by rotating around the support shaft cy in response to the reaction force Fr from the burr 24. In this state, it moves in the outward direction Ddo along the radial direction Dd.

Then, the drilling blade 142 in contact with the inner wall 25 of the through hole 23 presses the burr 24 to drill the burr 24. It should be noted that the perforated burrs 24 are not burrs having a shape expanded along the circumferential direction of the through holes 23, but are likely to be burrs in a state where any part is torn by the perforations. After drilling the burrs 24, as shown in FIG. 3, the drilling blade 142 penetrates the through hole 23 as the first press portion 100 progresses, so that the burrs 24 are expanded downward by the tip blade 140. It will be a return burr. Further, after the drilling blade 142 penetrates the through hole 23, the dog plate 121 of the dog 120 is pressed against the upper surface 221 of the backing seat 220 as the first press portion 100 advances. At this time, the movement of the dog plate 121 is pressed against the backing seat 220 and stopped, but the first press die 110 and the tip blade support 130 can move downward according to the driving force applied to the first press die 110. be. Therefore, the dog plate 121 moves upward relative to the first press mold 110 and the tip blade support 130, and the tip blade 140 moves from the dog plate 121 in response to this relative movement. Upon receiving the upward force Fu, it rotates around the support shaft cy, and the drilling blade 142 is extruded along the rotation direction Rcyo and expanded outward in the radial direction Dd from the end edge of the through hole 23. To go.

Then, as shown in FIG. 4, the drilling blade 142 has the cutting blade 148 of the tip blade 140 as a processed product because the relative ascending of the dog plate 121 by pressing the dog plate 121 against the backing seat 220 continues. It is expanded along the rotation direction Rcyo to a position where it abuts on the root portion of the burr 24 on the lower surface 21 of 20. In the process of expanding the drilling blade 142, the male screw 125 provided on the dog shaft 122 is screwed into the female screw 136 provided on the tip blade support 130. As a result, the tip blade support 130 rotates in the rotation direction Rcxa with the central axis CX as the rotation center, and accordingly, the cutting blade 148 of the tip blade 140 also rotates in the rotation direction Rcxa. In this case, the drilling blade 142 is expanded along the rotation direction Rcyo and cut until the cutting blade 148 of the tip blade 140 comes into contact with the root portion of the burr 24 on the lower surface 21 of the processed product 20. Since the blade 148 rotates along the rotation direction Rcxa, the burr 24 can be cut off at the root portion of the burr 24 on the lower surface 21 of the processed product. Thereby, the burr 24 can be removed cleanly. In order to extend the cutting blade 148 of the tip blade 140 to a position where it just contacts the root portion of the burr 24 on the lower surface 21 of the processed product 20, the upper surface 221 of the backing seat 220 and the lower surface of the processed product 20 are to be expanded. The distance Si from 21 may be set to a value Sr such that when the surface of the cutting blade 148 is parallel to the lower surface 21, the lower surface 21 and the cutting blade 148 are in contact with each other. Further, the direction of the rotation direction Rcxa may be a direction opposite to the direction shown in FIG. 4, and is set according to the thread cutting method of the male screw 125 and the female screw 136.

As can be seen from the above description, the male screw 125 of the dog 120 and the dog shaft 122 and the female screw 136 of the tip blade support 130 correspond to the "rotation mechanism" according to the claim. Further, the tip blade support 130, the tip blade 140 rotatably supported around the support shaft cy by the support portion 134 of the tip blade support 130, and the dog 120 are the "expansion mechanism" described in claim. Is equivalent to.

As described above, in the deburring apparatus 10 of the above-described embodiment, the deburring 24 at one end of the through hole 23 of the processed product 20 can be cleanly removed at the root portion, so that the deburring cannot be completely removed and remains. It is possible to suppress the occurrence of deburring. The structure for removing the root portion of the burr 24 at one end of the through hole 23 of the processed product 20 is a dog 120, a male screw 125 of the dog shaft 122, and a female screw 136 of the tip blade support 130. It can be easily realized by a simple rotation mechanism configured.

Further, in the burr removing device 10 of the above embodiment, the drilling blade 142 is expanded in the radial direction so as to come into contact with the inner wall 25 of the through hole 23 due to the reaction force received from the burr 24 as the first press portion 100 advances. Therefore, the position of the drilling blade 142 can be adjusted according to the diameter of the through hole 23, and deburring of various through holes having different diameters can be performed. The position of the drilling blade 142 can be easily adjusted by a simple movable mechanism composed of the support portion 134 of the tip blade support 130 that rotatably supports the tip blade 140 with the support shaft cy. can.

B. Other embodiments:
(B1) The deburring device 10 of the above embodiment can also be applied as a device for chamfering the opening of the through hole 23. FIG. 6 is an explanatory diagram showing chamfering by the deburring device 10. As shown in FIG. 6, when the burr removing device 10 is used for chamfering, the distance Si between the upper surface 221 of the backing seat 220 and the lower surface 21 of the processed product 20 is set with respect to the distance Si = Sr set in the case of deburring. By setting Si <Sr, the cutting blade 148 interferes with the mouth region 26 of the opening of the through hole 23 before the cutting blade 148 becomes parallel to the lower surface 21. As a result, the mouth region 26 of the opening of the through hole 23 can be chamfered. As the tip blade used in this case, it is preferable to use a tip blade having a curved shape in which the shape of the cutting edge matches the chamfer shape, instead of the tip blade 140 having the cutting blade 148 described in the embodiment.

(B2) The deburring device 10 of the above embodiment has a configuration having a pair of tip blades 140 supported by a pair of support portions 134 arranged at equal intervals along the circumferential direction Rcx, but is limited to this. However, it may have a configuration having a plurality of tip blades 140 supported by a plurality of a plurality of support portions 134 arranged at equal intervals along the circumferential direction Rcx. Further, the configuration may include one tip blade 140 supported by one support portion 134 arranged along the circumferential direction Rcx.

(B3) In the above embodiment, the description of the drive unit for moving the first press unit 100 of the deburring device 10 in the vertical direction is omitted. As this drive unit, the first press unit 100 including the first press mold 110 supported by the support unit SM is reciprocated along the axial direction Dcx, and the dog plate 121 of the dog 120 is applied to the second press unit 200. Any configuration may be used as long as it can be pressed against the seat 220. If a robot to which the first press unit 100 can be mounted is used as a drive unit, it can be universally applied to deburring a plurality of processed products regardless of the diameter of the through hole and the position of the through hole. Is possible.

(B4) In the above embodiment, the male screw 125 provided on the dog shaft 122 is provided on the tip blade support 130 due to the relative ascent of the dog plate 121 by pressing the dog plate 121 against the backing seat 220. An example of a rotation mechanism has been described in which the tip blade support 130 is rotated and the cutting blade 148 of the tip blade 140 can be rotated by screwing on the female screw 136. However, the mechanism is not limited to this, and any mechanism may be used as long as the mechanism allows the cutting blade 148 to rotate when the cutting blade 148 comes into contact with the root portion of the burr 24.

(B5) In the above embodiment, the burr removing device 10 has been described by taking the removal of burrs 24 in the through holes 23 of the processed product 20 produced by die casting as an example. However, the processed product to be deburred is produced by die casting. It is not limited to processed products that have been processed. The deburring device 10 is used to remove burrs generated in processed products manufactured by various manufacturing methods such as burrs generated in through holes of resin molded products and burrs generated in through holes of processed products formed by cutting metal. Applicable for removal.

(B6) In the above embodiment, the first press portion 100 and the second press portion 200 of the burr removing device 10 are vertically oriented with the direction of the central axis CX of the through hole 23 of the horizontally arranged processed product 20 as the vertical direction. The case of arranging in is described as an example, but the present invention is not limited to this. The first press portion 100 and the second press portion 200 may be arranged in the left-right direction with the direction of the central axis CX of the through hole 23 as the left-right direction. That is, the first press portion 100 and the second press portion 200 may be arranged according to the direction of the central axis CX of the through hole 23.

The present disclosure is not limited to the above-described embodiment, and can be realized by various configurations within a range not deviating from the gist thereof. For example, the technical features of the embodiments corresponding to the technical features in each of the embodiments described in the column of the outline of the invention may be used to solve some or all of the above-mentioned problems, or a part of the above-mentioned effects. Or, in order to achieve all of them, it is possible to replace or combine them as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be appropriately deleted.

10 ... Deburring device, 20 ... Processed product, 21 ... One surface (bottom surface), 22 ... Other surface (upper surface), 23 ... Through hole, 24 ... Burr, 100 ... First press section, 110 ... First press Mold, 111 ... Side surface (lower surface) of the processed product, 112 ... First groove, 113 ... Second groove, 114 ... Guide groove, 116 ... Surface opposite to the lower surface of the first press mold (upper surface), 120 ... Dog, 121 ... Dog plate, 122 ... Dog shaft, 123 ... Shaft end on the opposite side of the dog plate (tip end), 124 ... Dog plate side shaft end (root side shaft end) ), 125 ... Male screw, 126 ... Key, 130 ... Tip blade support, 132 ... Central through hole, 134 ... Support, 136 ... Female screw, 140 ... Tip blade, 142 ... Drilling blade, 144 ... End, 146 ... outer surface, 148 ... cutting blade, 150 ... spring, 162 ... bearing, 163 ... bush, 200 ... second press part, 210 ... second press mold, 211 ... second press mold side surface (upper surface) ), 220 ... bearing seat, 221 ... side surface (upper surface) of the processed product, CX ... central axis, cy ... support shaft, Dcx ... axial direction, Dd ... radial direction, Rcx ... circumferential direction, SM ... support portion

Claims (1)

It is a deburring device
The axis of rotation and
At the tip of the rotary shaft, a tip blade that is expandably provided in the radial direction of the rotary shaft, and is a drilling blade for drilling burrs of the workpiece when advancing to the workpiece, and drilling. A cutting blade for cutting the return burr that accompanies the process, and a tip blade that expands the drilling blade in the radial direction of the rotating shaft by the reaction force received from the burr of the object to be machined as it progresses.
An expansion mechanism provided at the tip of the rotary shaft for expanding the drilling blade in the radial direction of the rotary shaft to bring the cutting blade into contact with the return burr.
A rotation mechanism for rotating the cutting blade by rotating the rotation axis when the cutting blade is brought into contact with the return burr.
A deburring device.

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