KR101302635B1 - Apparatus For Adjusting Positon Of Drill Bit In Drill Bit Re-Sharpener - Google Patents

Abstract

The present invention relates to a drill bit position adjusting device for positioning the drill bit at a constant height so that precise machining is performed when re-grinding the cutting edge of the drill bit for processing the printed circuit board.
Drill bit repositioning device for a drill bit regrinding apparatus of the present invention,
The collet chuck 110 to which the drill bit A is mounted, the universal joint 120 installed at the rear end of the collet chuck to connect the collet chuck up and down, and to support the collet chuck not to sag down. Drill bit provided with a collet chuck support unit 130, a collet chuck lowering unit 140 for imparting a descending force to the collet chuck support unit, and a collet chuck returning member 150 for returning the collet chuck support unit which has been moved down. Holder 100;
An elevator (200) installed in front of the drill bit holder (100);
A support block 300 mounted on the elevator 200 to support the cutting tip of the drill bit;
An optical inspector 400 for photographing a cutting tip height of the drill bit mounted on the drill bit holder 100; And
Receiving the cutting tip position information of the drill bit from the optical inspector 400 is configured to include a control unit for controlling the height of the cutting tip of the drill bit by controlling the driving of the elevator (200).

Description

Apparatus For Adjusting Positon Of Drill Bit In Drill Bit Re-Sharpener}

The present invention relates to a drill bit position adjusting device for positioning the drill bit at a constant height so that precise machining is performed when regrinding the cutting tip of the drill bit for processing the printed circuit board.

In general, a printed circuit board is wired to one or both sides of a board made of various thermosetting resins, and then the IC or electronic components are placed and fixed on the board, and the electrical wiring is implemented to coat them with an insulator. will be. Background Art Since the development of electronic components, multilayer printed circuit boards made of overlapping circuit conductors have been developed, and recently, research on the high density of multilayer printed circuit boards has been actively conducted.

Thousands of small diameter through-holes are formed in the circuit board, which receive leads or pins to connect various components to the circuit board and trace a single layer of electrical circuit traces. ) Is used to connect to another, to provide a reference point for continuous processing, and to be able to have a complete printed circuit board in the final housing.

Therefore, the through holes have a very small diameter, so that the drill bit for drilling the drill bit also has a cutting edge of a very small diameter, and a positioning ring is fitted to the body of the drill bit so that machining is always performed at a constant depth. . This positioning ring is the basis for ensuring that the drill bit is always held in the correct position in the drill tool holder.

The cutting edge of the drill bit is mainly made of a very hard wear resistant material such as tungsten carbide. Such a material is resistant to wear, but after machining a certain number of holes, the performance of the drill bit is degraded, so that it is not sharp enough to maintain tolerance with respect to the reference diameter for the hole. Therefore, if the cutting edge of the drill bit is dull in terms of cost, it is advantageous to use the drill bit mainly for reheating rather than discarding the drill bit.

Recently, an automatic regrinding apparatus of a drill bit for continuously performing a regrinding process while the rotating body is rotated in stages with a drill bit coupled to a drill bit holder of a rotating body has been disclosed in Korean Patent Publication No. 10-745665. Known through

However, such a conventional drill bit regrinding device is a position for adjusting the length between the cutting end of the drill bit from the end of the drill bit holder so that the distance between the cutting end of the drill bit mounted on the drill bit holder and the regrinding machine is constant. Since only the adjusting device is provided, when re-grinding a drill bit having a different outer diameter, the regrinding height is different, so that precise machining cannot be performed.

Domestic Patent Publication No. 10-745665

An object of the present invention is to provide a drill bit position adjustment device for a drill bit regrinding device that can adjust the height of the cutting edge of the drill bit mounted on the drill bit holder so that the height of the drill bit is always constant.

The present invention for achieving the above object is installed in the collet chuck and the collet chuck mounted to the drill bit is installed on the rear end of the collet chuck to support the collet chuck so that the collet chuck does not fall down collet A drill bit holder having a chuck support unit and a collet chuck lowering means for applying a lowering force to the collet chuck supporting unit, a collet chuck returning member for returning the collet chuck supporting unit which has been moved downward, and an elevator installed in front of the drill bit holder And an optical inspector for photographing the support block mounted in the elevator to support the cutting tip of the drill bit, the cutting tip height of the drill bit mounted to the drill bit holder, and the cutting tip position information of the drill bit from the optical inspector. It receives a control unit for controlling the driving of the elevator to include a control unit for adjusting the height of the cutting edge of the drill bit Characterized in that the open configuration.

In addition, the drill bit holder is a collet chuck on which the drill bit is mounted, a universal joint installed at the rear end of the collet chuck to connect the collet chuck to move up and down, and a collet chuck supporting the collet chuck so as not to sag down. A unit, a collet chuck lowering means for giving a lowering force to the collet chuck support unit, and the collet chuck returning member for returning the collet chuck support unit moved down.

In this case, the drill bit holder is installed on the rotating body to rotate horizontally in stages, the collet chuck support unit is a vertical block fixed to one side of the rotating body and the lifting block to support the collet chuck while lifting along the vertical fixing plate It is desirable to be configured.

In addition, the collet chuck returning member is an elastic member that is compressed by being pushed by a fixing screw which is fastened to the elevating block and descends along the elevating block to penetrate the elevating block to descend along the elevating block. It is desirable to be configured.

The collet chuck lowering means includes a vertical cylinder disposed at a lower portion of the lifting block, a locking protrusion formed at a lower end of the lifting block of the collet chuck support unit, and fixed to an end of the vertical cylinder rod to lower the vertical cylinder rod. It may be composed of a guide piece for holding down the locking projections.

Meanwhile, a drill bit seating groove may be formed at an upper end of the support block, and the elevator may further include a lift cover surrounding an upper portion of the drill bit seated in the drill bit seating groove so that the drill bit does not flow when regrinding.

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In addition, a pressing protrusion for pressing the cutting edge of the drill bit may be further formed on the bottom surface of the lifting cover.

Drill bit repositioning device for a drill bit regrinding apparatus according to the present invention is installed in the collet chuck equipped with a drill bit rotatable up and down and the height information of the cutting tip of the drill bit obtained from the optical tester photographing the cutting tip of the drill bit Is analyzed to improve the height of the cutting edge of the drill bit to the reference height by lifting and lowering the support block supporting the cutting edge of the drill bit, so that the regrinding height is constant even in the case of drill bits having different cutting diameters. By adjusting, there is an effect that can always perform precise machining.

1 is a perspective view of the use state of the drill bit position adjustment device for a drill bit re-polishing apparatus according to the present invention.
Figure 2 is a side view of the use state of the drill bit position adjustment device for a drill bit re-polishing apparatus according to the present invention.
Figure 3 is a front view of the use state of the drill bit position adjustment device for a drill bit re-polishing apparatus according to the present invention.
Figure 4 is a view showing a state further provided with a lift cover in the elevator constituting the present invention.
5 is a side view of the present invention, showing a state in which the support block is lowered so that the height of the cutting edge of the drill bit is lowered.
Figure 6 is a side view of the present invention, showing a state in which the support block is raised so that the height of the cutting edge of the drill bit is increased.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. The same reference numerals are used for the same components, and only the different portions are described for the sake of clarity.

As shown in Figures 1 to 3, the present invention is equipped with a drill bit holder 100 is mounted to the drill bit (A) rotatably up and down, and the elevator 200 installed in front of the drill bit holder 100 And an optical image of cutting edge heights of the support block 300 mounted on the elevator 200 and the drill bit A mounted on the drill bit holder 100 to support the cutting edge of the drill bit A. The cutting machine 400 and the optical tip 400 receives the cutting tip position information of the drill bit A to control the driving of the elevator 200 to adjust the height of the cutting tip of the drill bit A. It is composed of a control unit (not shown).

The drill bit holder 100 is preferably to be installed in each rotation direction on the top of the rotating body (1) to rotate horizontally step by step to enable continuous operation. In this case, a fixing bracket 2 for stably fixing the drill bit holder 100 is installed.

The drill bit holder 100 is a collet chuck 110 on which the drill bit A is mounted, and a universal joint 120 installed at the rear end of the collet chuck 110 to connect the collet chuck 110 up and down. And, the collet chuck support unit 130 for supporting the collet chuck 110 so as not to sag down, and the collet chuck lowering unit 140 for giving a descending force to the collet chuck support unit 130, and descending It is composed of a collet chuck returning member 150 for returning the moved collet chuck support unit 130.

The collet chuck 110 is installed in a horizontal state toward the outside of the rotating body (1). The collet chuck 110 is a locking sleeve 111 installed to elastically move back and forth to the front end of the body of the collet chuck 110, chucking when the locking sleeve 111 is received in the interior of the locking sleeve 111 is moved to the rear It consists of a collet head 112 to release the state.

The rear end of the collet chuck 110 is installed at the rear end of the collet chuck 110 is connected to the universal joint 120 to move the collet chuck 110 up and down. In this embodiment, the drill bit holder rotating motor M for rotating the drill bit holder 100 is installed on the upper end of the rotating body 1, the rotating shaft of the drill bit holder rotating motor M is a collet chuck. For example, it is connected to the rear end of the 110 through the universal joint 120.

The unit vertical joint connects the rotating shaft and the collet chuck 110 of the rotating motor such that the collet chuck 110 rotates in the vertical, horizontal, left and right directions.

The collet chuck support unit 130 is a member that supports the collet chuck 110 configured to freely rotate up and down through the universal joint 120 so that it does not sag normally, and is vertically fixed to the upper end of the rotating body 1. The fixed plate 131 and the lifting block 132 supporting the collet chuck 110 while lifting up and down along the vertical fixing plate 131. In this embodiment, for example, the vertical fixing plate 131 is installed on the top of the fixing bracket (2).

The collet chuck lowering unit 140 includes a vertical cylinder 141 spaced apart from the lower side of the elevating block 132, and a locking protrusion 142 formed at the lower end of the elevating block 132 of the collet chuck supporting unit 130. It is fixed to the end of the vertical cylinder rod (141a) is composed of a guide piece 143 for pulling down the locking projection 142 when the vertical cylinder rod (141a) is lowered.

On the other hand, the collet chuck lowering means 140 may be installed to rotate together along the rotating body 1, it is preferable to be installed separately from the rotating body 1 as shown. When the collet chuck lowering unit 140 is installed separately from the rotating body 1 as described above, the collet chuck lowering unit 140 is required without having the collet chuck lowering unit 140 for each drill bit holder 100. There is an advantage that it can be provided only in the process.

In this case, the guide piece 143 is a locking projection 142 of the lifting block 132 selectively to the guide piece 143 according to the degree of movement of the rotating body 1 in the process of rotating the rotating body (1). It consists of a pair spaced apart to face each other so that they can be caught. The locking protrusion 142 moves along the spaced space of the guide pieces 143.

On the other hand, the collet chuck returning member 150 passes through the vertical fixing plate 131 to descend along the elevating block 132, the fixing screw 151 is fastened to the elevating block 132, and along the elevating block 132 The lowering member is composed of an elastic member 152 that is pressed by the fixing screw 151 and provides a lifting force to the lifting block 132.

According to the present invention, the elevator 200 is installed in front of the drill bit holder 100, the support block 300 is mounted to support the cutting edge of the drill bit (A) to the elevator.

Preferably, the drill bit seating groove 310 is formed at the center of the upper end of the support block 300. In addition, the seating groove 310 may have a “V” shape along the shape of the drill bit A so that the drill bit A may be naturally guided to the seating groove 310.

In addition, as shown in Figure 4, the elevator 200, the lifting guide for wrapping the upper portion of the drill bit (A) seated in the drill bit seating groove 310 so that the drill bit (A) does not flow during re-polishing ( 330 may be further provided. In this case, the lifting guide 330 is installed to the elevator 200 to be lifted. In addition, the lifting guide 330 may further include a pressing protrusion 331 for pressing the cutting edge of the drill bit (A).

The optical inspector 400 installed in front of the regrinding machine (not shown) is composed of a camera 410 and an illumination 420 installed with the collet chuck 110 interposed therebetween, and the drill bit mounted on the drill bit holder 100. The height of the cutting edge of (A) is photographed, and the photographing data is transmitted to the controller.

The control unit controls the driving of the elevator 200 so that the cutting edge of the drill bit A is at a constant height according to the cutting edge height information of the drill bit A transmitted from the optical inspector 400, thereby supporting the support block 300. ) Adjust the height.

The present invention configured as described above adjusts the height of the cutting edge of the drill bit through the following process.

First, the drill bit (A) to be polished is mounted on the collet chuck 110 of the drill bit holder 100 and positioned in front of the regrinding machine. The collet chuck 110 at this time is connected to the collet chuck support unit 130. Through this, the horizontal state is maintained stably.

In this state, the support block 300 ascends to a certain height through the elevator 200 to support the cutting edge of the drill bit (A). When the mounting groove 310 is formed at the upper end of the support block 300, the cutting tip of the drill bit (A) is restrained so as not to flow to the left and right while being seated in the mounting groove (310).

When the cutting edge of the drill bit (A) is stably supported by the support block 300, the optical inspector 400 measures the height of the cutting edge of the drill bit (A). Since the height of the cutting tip is changed whenever the outer diameter of the cutting tip is changed, the optical inspector 400 photographs the cutting tip of the drill bit A and transmits the height information to the controller.

The controller receiving the height information determines how much the cutting edge height is different from the reference height, calculates a correction distance, and then controls the operation of the elevator 200 so that the drill bit A is based on the universal joint 120. The cutting tip height of the drill bit (A) is adjusted while rotating up and down.

Looking more specifically at the process of adjusting the cutting edge height of the drill bit (A) as follows.

The control unit first and the control unit lowers the vertical cylinder rod 141a. When the vertical cylinder rod 141a is lowered, the locking protrusion 142 of the lifting block 132 is accommodated in the guide piece 143, and thus the lifting block 132 is lowered along the vertical cylinder rod 141a. The chuck 110 is free to rotate up and down about the universal joint.

When the cutting tip height of the drill bit A is higher than the reference height, the controller lowers the elevator 200 to lower the support block 300. As the support block 300 descends, the collet chuck 110 rotates downward by its own weight based on the universal joint 120. As a result, as shown in FIG. 5, the cutting tip of the drill bit A is The height is lowered while descending along the support block 300 in a state seated in the seating groove 310 of the support block 300.

If the cutting tip height of the drill bit (A) is lower than the reference height, the control unit drives the elevator 200 to raise the support block 300. As the support block 300 rises, the collet chuck 110 pivots upward based on the universal joint 120. As a result, as shown in FIG. 6, the height of the cutting edge of the drill bit A increases. do.

On the other hand, when the lifting guide 330 is further installed in the elevator 200, after the height of the cutting edge of the drill bit (A) reaches the reference position, the lifting guide 330 is lowered and the upper portion of the drill bit (A) Cover it. At this time, the pressing projection 331 pressurizes the upper portion of the cutting end of the driit (A). Accordingly, since the drill bit (A) is stably supported in the drill bit seating groove (310), the drill bit (A) can be precisely processed without flowing during re-polishing.

When the above process is completed, the re-grinding of the drill bit (A) is performed.

When the regrinding of the drill bit A is completed, the controller controls the lowering force provided to the vertical cylinder rod 141a to be removed or the vertical cylinder rod 141a is raised to its original position. At this time, the elastic member 152 is pressed down by the fixing screw 151 while being lowered along the lifting block 132, and the lowering force provided to the vertical cylinder rod 141a is removed or the vertical cylinder rod 141a is originally When raised to the position, the lifting block 132 is provided with the lifting force from the elastic member 152 to rise naturally. As a result, the drill bit (A) is rotated upward, and is stably supported in a horizontal state while returning to its original position.

When the drill bit A is stably supported in a horizontal state, the rotating body 1 rotates to perform the next process. As the rotating body 1 rotates, the locking protrusion 142 of the lifting block 132 moves out of the guide piece 143 while moving along the spaced space between the guide pieces 143 and the collet chuck 110. And drill bit (A) is to move freely to the next process along the rotating plate.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be takeners of ordinary skill in the art, And such variations are within the scope of the present invention.

100 ... Drill Bit Holder 110 ... Collet Chuck
120 ... Universal Joint 130 ... Collet Chuck Support Unit
131 Vertical Locking Plate 132 Lifting Block
140 ... collet lowering device 141 ... vertical cylinder
141a ... vertical cylinder rod 142
143-Guide-150-Collet Chucks
151 Retaining screw 152 Resilient member
200 ... Elevator 300 ... Support Block
310 ... Drill bit set groove 330 ... Elevation guide
331 ... Pressure projection 400 ... Optical Inspector
A ... Drill Bit

Claims (8)

A collet chuck on which the drill bit is mounted, a universal joint installed at the rear end of the collet chuck to connect the collet chuck up and down, a collet chuck supporting unit for supporting the collet chuck not to sag down, and the collet chuck supporting A drill bit holder having a collet chuck lowering means for giving a lowering force to the unit, and a collet chuck returning member for returning the collet chuck supporting unit which has been moved downward;
An elevator installed in front of the drill bit holder;
A support block mounted to the elevator to support the cutting edge of the drill bit;
An optical inspector for photographing a cutting edge height of the drill bit mounted to the drill bit holder; And
Drill bit position for the drill bit regrinding apparatus characterized in that it comprises a control unit for receiving the cutting edge position information of the drill bit from the optical inspector to control the driving of the elevator to adjust the height of the cutting edge of the drill bit Regulator. delete The method of claim 1,
The drill bit holder is installed in the rotating body to rotate horizontally in stages,
The collet chuck support unit is a drill bit repositioning device for a drill bit regrinding device, characterized in that consisting of a lifting block for supporting the collet chuck while lifting up and down along the vertical fixing plate fixed to one side of the rotating body. The method of claim 3, wherein
The collet chuck return member
A fixing screw fastened to the elevating block by penetrating the vertical fixing plate to descend along the elevating block; And
Drill bit repositioning device for a drill bit regrind device, characterized in that consisting of an elastic member which is pressed by the fixing screw descending along the lifting block to provide a lifting force to the lifting block. The method of claim 3, wherein
The collet chuck lowering means
A vertical cylinder spaced apart from the lower portion of the lifting block,
A locking protrusion formed at a lower end of the lifting block of the collet chuck support unit;
Drill bit repositioning device for a drill bit regrind device, characterized in that consisting of a guide piece fixed to the end of the vertical cylinder rod to lower the locking projections when the vertical cylinder rod descends. delete The method of claim 1,
The elevator has a drill bit repositioning device for adjusting the drill bit, characterized in that the lifting guide is further provided to surround the upper portion of the drill bit seated in the drill bit seating groove so that the drill bit does not flow when re-grinding. 8. The method of claim 7,
Drill bit repositioning device for a drill bit regrind device, characterized in that the bottom surface of the lifting guide is further formed with a pressing projection for pressing the cutting edge of the drill bit.

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