KR102579671B1 - Tappable burring machine - Google Patents

Abstract

A “burring machine capable of tapping processing” is disclosed. The burring machine capable of tapping processing of the present invention includes a work table 111 on which a processed product is loaded, the upper surface of which has a basic hole 11 formed therethrough; a burring portion 120 that moves up and down from the upper part of the work table 111 toward the work table 111 and forms a burring hole 13 by burring the basic hole 11; A tapping processing unit ( 130) may be included.
Here, the burring portion 120 includes a burring holder 121 to which a burring pin 123, which presses the basic hole 11 to form a burring hole 13, is detachably coupled to the lower portion; The burring pin 123 is placed at a burring pin origin position spaced at a certain height on the upper part of the processed product, a basic hole alignment position in contact with the upper surface of the basic hole 11, and the basic hole 11 is pressed to form the burring hole 13. It may include a hydraulic cylinder 125 that elevates to the burring processing position.
In addition, the tapping processing unit 130 includes a tapping head 131; A tapping tool (133) provided on the upper part of the tapping head (131) and having the tapping tip (133a) at the upper end; a tapping tool transfer cylinder (134) supporting the tapping tool (133) to be lifted up and down relative to the tapping head (131); It may include a tapping tool rotating unit 135 provided below the tapping head 131 to rotate the tapping head 131 forward and backward depending on whether pneumatic pressure is applied.

Description

Tappable burring machine}

The present invention relates to a burring machine, and more specifically, to a burring machine capable of simultaneously burring and tapping a processed product.

In general, a metal plate is provided with a nut hole for fastening a bolt so that various parts can be assembled.

In order to form this type of nut hole, as shown in (a) of FIG. 1, a basic hole 11 having a first inner diameter (R1) is drilled in the metal plate using a punching machine, and then as shown in (b) of FIG. 1. As shown, a burring operation of punching a hole is performed using a pressure bar whose outer diameter is slightly larger than that of the basic hole 11. Through the burring operation, a burring hole 13 of a certain thickness d having an outer diameter R2 larger than that of the basic hole 11 is formed in the metal plate 10.

Then, when the burring processing is completed, a tapping operation to form a thread using a tap tool is performed to process a tab 15 on the inner wall of the burring hole 13, as shown in (c) of FIG. 1. You can.

However, in the conventional nut hole forming process described above, a hole is made by punching a metal plate, burring processing is performed using a burring machine, and tapping work is performed separately using a tapping machine, so the transportation time of the metal plate is shortened. There was a disadvantage in that processing time was added, so it took a lot of time and work productivity was low.

Moreover, when performing tapping work after performing burring work, if the burring hole and the tap are not exactly aligned, the thread cannot be machined accurately, which not only caused problems such as an increased defect rate, but also caused significant labor costs due to the need for skilled workers. Negative effects occurred, such as spending

Registered Patent No. 10-0757509 “Simultaneous processing device for burring and tapping operations”

The purpose of the present invention is to solve the above-mentioned problem, and to provide a burring machine that can simultaneously perform burring and tapping operations on a processed product.

Another object of the present invention is to provide a burring machine capable of processing threads of various sizes and pitches.

The object of the present invention described above can be achieved by a burring machine capable of tapping processing. The burring machine of the present invention includes a work table 111 on which a processed product is loaded, the upper surface of which has a basic hole 11 formed therethrough; a burring portion 120 that moves up and down from the upper part of the work table 111 toward the work table 111 and forms a burring hole 13 by burring the basic hole 11; A tapping processing unit ( 130) may be included.

Here, the burring portion 120 includes a burring holder 121 to which a burring pin 123, which presses the basic hole 11 to form a burring hole 13, is detachably coupled to the lower portion; The burring pin 123 is placed at a burring pin origin position spaced at a certain height on the upper part of the processed product, a basic hole alignment position in contact with the upper surface of the basic hole 11, and the basic hole 11 is pressed to form the burring hole 13. It may include a hydraulic cylinder 125 that elevates to the burring processing position.

In addition, the tapping processing unit 130 includes a tapping head 131; A tapping tool (133) provided on the upper part of the tapping head (131) and having the tapping tip (133a) at the upper end; a tapping tool transfer cylinder (134) supporting the tapping tool (133) to be lifted up and down relative to the tapping head (131); It may include a tapping tool rotating unit 135 provided below the tapping head 131 to rotate the tapping head 131 forward and backward depending on whether pneumatic pressure is applied.

The burring machine according to the present invention is equipped with a burring part and a tapping processing part at the top and bottom of the workbench, so that burring processing and tapping processing can be performed together. Accordingly, when forming a nut hole in a processed product, burring hole processing and tapping processing can be performed sequentially inside one burring machine, which has the advantage of significantly shortening the processing time.

In addition, the burring machine according to the present invention has the advantage of minimizing tapping processing defects because it performs burring and tapping processing after coaxially aligning the burring machine and the tapping machine with the basic hole of the processed product before processing. there is.

In addition, the burring part can be operated by hydraulic pressure and the tapping part can be operated by pneumatic pressure to improve processing efficiency and processing speed.

In addition, there is an advantage that the tapping tool can be exchanged during tapping processing, allowing pitch rotation to match the tap.

1 is an example diagram showing the process of forming a nut hole in a metal plate;
Figure 2 is a side cross-sectional view showing the side configuration of the burring machine according to the present invention;
Figure 3 is a side cross-sectional view showing the configuration of the burring part of the burring machine according to the present invention;
Figure 4 is a side cross-sectional view showing the lower structure of the burring machine according to the present invention;
Figure 5 is a side cross-sectional view showing the configuration of the tapping processing part of the burring machine according to the present invention;
Figures 6 to 8 are cross-sectional examples showing the process of forming a nut hole in a processed product by a burring machine according to the present invention.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the present invention and the accompanying drawings, assuming that the same reference numerals in the drawings refer to the same components.

When it is said that one component "includes" another component in the detailed description of the invention or in the patent claims, this is not to be construed as being limited to consisting of only that component, unless specifically stated to the contrary, and other components are not included. It should be understood that it can include more.

Figure 2 is a side cross-sectional view showing the side cross-sectional configuration of the burring machine 100 according to the present invention. The burring machine 100 according to the present invention forms a nut hole at once by sequentially performing burring and tapping processing on the workpiece 10 through which the basic hole 11 is formed.

For this purpose, the burring machine 100 according to the present invention is provided on the work frame 110 and the upper part of the work frame 110 to perform burring work on the basic hole 11 of the processed product 10 loaded on the work table 111. A burring unit 120, a tapping processing unit 130 provided at the lower part of the work frame 110 to perform a tapping operation on the workpiece 10 on which the burring operation has been performed by the burring unit 120, and a tapping processing unit. It includes a tapping tool additional lifting unit 140 that moves (130) up and down.

The burring machine 100 according to the present invention is provided with a burring part 120 for performing burring processing on the processed product 10 at the upper part of the work frame 110, and a tapping device for performing tapping processing on the processed product 10 at the lower portion. Study (130) is provided together. Accordingly, there is an advantage in that the nut hole manufacturing efficiency of the processed product 10 can be significantly improved by performing the tapping process immediately after the burring processing on the processed product 10.

In addition, since the processing proceeds sequentially with the burring tool and the tapping tool aligned on the axis while the processed product is fixed and not moved, the screw thread can be formed accurately, which has the advantage of significantly lowering the defect rate.

The work frame 110 supports each component so that the burring portion 120 and the tapping processing portion 130 are operated while the processed product 10 is loaded and a nut hole is formed.

The work frame 110 includes a work table 111 on which the processed product 10 is loaded, a plurality of ball casters 113 provided at regular intervals on the upper surface of the work table 111 to support the lower part of the processed product 10, and a work table 111 on which the processed product 10 is loaded. A burring cup holder 115 provided corresponding to the position where the nut hole of (10) is to be machined to guide the vertical movement of the tool, and an upper portion provided at the top of the work table 111 to support the burring portion 120. Includes frame 117.

The work table 111 accommodates a tapping processing part 130, a tapping tool additional lifting part 140, and a hydraulic pump 150 at the lower part. On the upper part of the work table 111, a plurality of ball casters 113 are provided in a plurality of rows and columns at regular intervals corresponding to the area of the work table 111, and a burring cup holder 115 is provided in the basic hole of the processed product 10 ( It is provided in a position corresponding to 11).

Although not shown in the drawing, an input unit (not shown) that receives an input signal from an operator and a control box (not shown) may be provided on one side of the work frame 110.

The burring unit 120 is provided on the upper frame 117 and is lifted and lowered toward the work table 111 to perform burring processing on the basic hole 11 formed in the processed product 10. Figure 3 is an enlarged side cross-sectional view showing the configuration of the burring portion 120.

As shown in Figures 2 and 3, the burring part 120 of the present invention is inserted into the basic hole 11 of the processed product 10 and includes a burring pin 123 that performs burring processing, and a burring pin 123. A detachably coupled burring holder 121, a high-tensile spring 124 that elastically supports the burring pin 123 inside the burring holder 121, and a burring holder (124) that is operated by pressure according to the inflow and outflow of the working fluid. It includes a hydraulic cylinder 125 that raises and lowers 121) and a plurality of height sensing rings 127, 127a, and 127b that detect the height of the burring holder 121.

The burring pin 123 forms the burring hole 13 by pressing the basic hole 11 with the downward pressure when the burring holder 121 is lowered by the hydraulic cylinder 125. The burring pin 123 is selected to correspond to the inner diameter of the desired nut hole and is detachably coupled to the burring holder 121.

The burring holder 121 has a burring pin 123 coupled to its lower part, moves up and down by the hydraulic cylinder 125, and supports the burring pin 123 to form the burring hole 13. At the top of the Burring holder 121, a hydraulic cylinder 125 is fixedly coupled to the upper frame 117. The hydraulic cylinder 125 is coupled to the burring holder 121 by a lifting rod 125a. At the bottom of the burring holder 121, a tool guide hole 121a is formed vertically to guide the burring pin 123 to the basic hole 11 of the processed product 10.

The high tension spring 124 applies elastic force so that the lowered burring pin 123 returns to its initial position.

The hydraulic cylinder 125 receives or discharges working fluid from the hydraulic pump 150 accommodated in the lower part of the work frame 110. When the working fluid is supplied, the length of the lifting rod (125a) exposed to the outside of the hydraulic cylinder (125) increases and the burring holder 121 is lowered. When the working fluid is discharged, the exposed length of the lifting rod (125a) shortens and the burring holder 121 is lowered. The holder 121 is raised.

Here, a sensing tag (125b) is provided on the upper plate surface of the lifting rod (125a), and a plurality of height sensing rings (127, 127a, 127b) that detect the sensing tag (125b) are provided on one side of the lifting rod (125a). do.

A sensor guide shaft 126 is provided on one side of the lifting rod 125a, and a plurality of height sensing rings 127, 127a, and 127b are coupled to the sensor guide shaft 126 along the height direction. The height sensing rings (127, 127a, 127b) are arranged at different heights along the moving path of the lifting rod (125a), the lifting rod (125a) is raised and lowered, and the sensing tag (125b) is connected to the corresponding height sensing ring (127, 127a). ,127b) When located inside, whether sensing is performed is transmitted to the control unit (not shown).

As shown in Figure 2, the burring portion 120 is moved to three different heights. Here, the upper limit value based on the height is the lower end of the upper frame 117, and the lower limit value based on the height is the lower end of the burring pin 123.

The first height (h1) is the burring pin origin position and is the position where the burring pin 123 is exchanged. This is the height at which the initial burring pin 123 is positioned when power is applied. The second height (h2) is the basic hole alignment position. The second height (h2), as shown enlarged in (b) of FIG. 6, is lowered when the burring holder 121 lowers and the lower end of the burring holder 121 comes into contact with the processed product 10, and the tool guide of the burring holder 121 The tapping tip 133a of the tapping tool 133 is inserted into the ball 121a, and the positions of the burring holder 121, the basic hole 11 of the processed product 10, and the tapping tool 133 are coaxial. It is the height at which it is aligned.

At the basic hole alignment position (h2), the burring holder 121, the tapping tool 133, and the basic hole 11 are aligned so that threads can be accurately formed during tapping.

The third height (h3) is the burring processing position at which the burring pin 123 descends from the second height (h2) and the burring hole 13 is processed. As shown enlarged in (a) of FIG. 7, the burring pin 123 passes through the basic hole 11 and processes the burring hole 13, and the tool moving hole ( This is the position inserted in 115a).

Meanwhile, a first height sensing ring 127, a second height sensing ring 127a, and a third height sensing ring 127b are formed sequentially from top to bottom on the sensor guide shaft 126. Figure 3 shows a state in which the sensing tag 125b of the lifting rod 125a is located on the first height sensing ring 127, and the burring portion 120 is located at the burring pin origin position h1.

The second height sensing ring (127a) is a sensor that detects the height corresponding to the basic hole alignment position (h2), and the third height sensing ring (127b) is a sensor that senses the height corresponding to the burring processing position (h3). It's a sensor.

The positions of the first height sensing ring 127, the second height sensing ring 127a, and the third height sensing ring 127b are determined by the operator using the sensing ring bracket 126a coupled to the sensor guide shaft 126. The position can be adjusted by moving it up or down.

The tapping processing unit 130 is provided at the lower part of the work table 111 and rotates and rises to the burring hole 13 of the processed product 10 in which the burring hole 13 is formed by the burring unit 120. Tapping processing is performed to form threads on the inner wall.

FIG. 4 is a side cross-sectional view showing the configuration of the tapping processing unit 130 and the tapping tool additional lifting unit 140, and FIG. 5 is a side cross-sectional view showing the configuration of the tapping processing unit 130.

As shown, the tapping processing unit 130 includes a tapping head 131, a tapping-only tool 133 provided at the top of the tapping head 131 to form a thread on the inner wall of the burring hole 13, and a tapping-only tool 133. A tapping tool transfer cylinder 134 is coupled to the tool 133 and lifts the tapping tool 133 up and down with respect to the tapping head 131, and is provided at the lower part of the tapping head 131 and includes a tapping head 131. It includes a tapping tool rotating unit 135 that applies rotational force to rotate.

The tapping head 131 is fixedly coupled to the additional tapping tool elevating part 140 and moves up and down by the additional tapping tool elevating part 140. Inside the tapping head 131, a tapping tool transport cylinder 134 is provided to be movable up and down by pneumatic pressure, and a tapping tool 133 is detachably provided at the top of the tapping tool transport cylinder 134.

The tapping tool 133 is selected to match the pitch of the thread to be formed on the inner wall of the burring hole 13 formed in the processed product 10. As shown in (b) of FIG. 5, the tapping tool 133 is provided with a tapping tip 133a at the top and a head coupling end 133b at the bottom.

The tapping tool 133 is provided with a plurality of tools having different pitch intervals per rotation of the tapping head 131, and among them, the one that matches the desired pitch interval is selected. For example, if a 2.5 tap is desired, a tapping tool (133) with a pitch of 0.45 per rotation is selected and coupled to the tapping tool transfer cylinder (134).

At this time, as shown in (b) of Figure 5, a tool exchange nut 132 is provided on the upper part of the tapping tool transfer cylinder 134, and the operator rotates the tool exchange nut 132 forward and backward and then uses the tapping tool. Replace (133) with the tapping tool transfer cylinder (134).

The tapping tool transfer cylinder 134 is operated by pneumatic pressure and moves up and down inside the tapping head 131. As shown in (a) of FIG. 5, an air cylinder tube 134a is provided at the lower part of the tapping head 131 to allow air to enter and exit the tapping head 131.

When air is discharged from the tapping head 131, the tool exchange nut 132 is positioned at the top of the tapping head 131, as shown in (a) of FIG. 7, and the tapping tool transfer cylinder 134 moves the tapping head 131. ) is accommodated inside.

On the other hand, when air flows into the tapping head 131, the tapping tool transfer cylinder 134 rises to the upper part of the tapping head 131, as shown in (b) of FIG. 7, and the tapping tool 133 moves to the processed product 10. ) is moved towards. Here, the transfer height of the tapping tool transfer cylinder 134 is not shown in the drawing, but the upper and lower limits are sensed by a limit switch (not shown), and the height of the tapping tool transfer cylinder 134 is adjusted.

The tapping tool rotating unit 135 is provided at the lower part of the tapping head 131 and applies rotational force to rotate the tapping head 131 for tapping processing. As shown in FIGS. 4 and 5, the tapping tool rotating unit 135 includes a tool rotating air cylinder 135a, an air lifting rod 135c that moves up and down by air inflow and outflow of the tool rotating air cylinder 135a, An air cylinder piston (135b) is provided at the lower part of the air lifting rod (135c) and moves up and down inside the air cylinder (135a) as the tool rotates, and an air lifting rod (135c) is provided to surround the upper part of the air lifting rod (135c). A ball screw block (135e) that is screwed together, a rotation shaft (135g) provided perpendicularly to the upper part of the ball screw block (135e), a ball bearing (135d) that supports rotation of the rotation shaft (135g), and a rotation shaft (135g) The spur gear (135f) is coupled to the upper end and transmits the rotation of the rotation axis (135g) to the tapping head (131), the tool rotation air cylinder (135a), the air lifting rod (135c), and the outside of the ball screw block (135e). Includes an external casing (135h) surrounding the.

When pneumatic pressure is applied to the tapping tool rotating unit 135 by the tool rotation air cylinder 135a, the air lifting rod 135c rises, and the ball screw block 135e converts the linear motion of the air lifting rod 135c into rotational movement. do.

A pair of spur gears (135f) provided on the upper part of the ball screw block (135e) engage and rotate with each other, and rotational force is transmitted to the tapping head (131) as shown in FIG. 5.

The tapping head 131 is rotated by the tapping tool rotating unit 135, and the tapping tool 133 coupled to the upper part of the tapping head 131 is raised and rotated by the tapping tool transfer cylinder 134.

The tapping tool additional lifting unit 140 is coupled to the tapping head 131 and moves the tapping head 131 up and down. As shown in FIG. 2, the tapping tool additional lifting unit 140 includes an up-down gear motor 141 fixedly coupled to the lower part of the work table 111, and an LM guide shaft 143 provided on one side of the up-down gear motor 141. ) and a tapping head bracket 145 that moves up and down along the LM guide axis 143 and is fixedly coupled to the tapping head 131.

The tapping tool additional lifting unit 140 causes the tapping head 131 to rise or fall along the LM guide axis 143 according to the forward and reverse rotation of the up-down gear motor 141. Since the tapping head 131 is combined with the tapping tool 133 and the tapping tool rotating unit 135, the entire tapping processing unit 130 is raised or lowered by the operation of the tapping tool additional lifting unit 140.

Here, as shown in FIG. 2, the tapping processing unit 130 has four different locations: the tapping tool origin position (h0), the burring cup insertion position (h4), the basic hole insertion position (h5), and the tapping processing position (h6). Go up and down.

Here, the lower end, which is the standard for height, is the middle height of the LM guide axis 143 fixed to the lower part of the work table 111, and the upper end, which is the standard for height, is the height of the tapping tip (133a) of the tapping tool (133). am.

The tapping tool origin position (h0) is the origin position where the tapping processing unit 130 is located when power is applied. In addition, the tapping tool origin position (h0) is a position where the tapping processing unit 130 is lowered by the tapping tool additional lifting unit 140 and the tapping tool 133 is exchanged from the tapping head 131.

The tapping tool origin position (h0) may be adjusted to the lowest height of the LM guide axis 143 depending on the case.

The burring cup insertion position (h4) is a position where the tapping tool 133 is replaced and inserted into the burring cup holder 115 of the work table 111 for burring processing. The basic hole insertion position (h5) is such that when the processed product 10 is loaded on the ball caster 113 of the work table 111, the tapping tool 133 is inserted into the basic hole 11 of the processed product 10 for position alignment. This is the insertion location.

As shown in (a) of FIG. 8, the tapping tool 133 is waiting at the burring cup insertion position (h4) to be inserted into the burring cup holder 115, and the new processed product 10 is placed on the work table 111. When this happens, the tapping tool 133 rises from the burring cup insertion position (h4) and rises to the basic hole insertion position (h5).

As shown enlarged in (a) of FIG. 6, the tapping tip 133a at the tip of the tapping tool 133 is inserted into the basic hole 11 of the processed product 10 at the basic hole insertion position h5, and FIG. As shown in (b), when the burring holder 121 is lowered, the tapping tip 133a, which protrudes at a certain height from the top of the processed product 10, is inserted into the tool guide hole 121a, and the tapping tip 133a and the burring holder are inserted into the tool guide hole 121a. (121) is axially aligned with the basic hole (11).

The tapping processing position (h6) rises from the basic hole insertion position (h5) and is the position where the tapping processing is completed. As shown in (b) of FIG. 7, the tapping tool 133 rotates and rises to form a thread on the inner wall of the burring hole 13 and performs tapping processing. When the tapping process is completed, the tapping tip 133a is vertically inserted into the tool guide hole 121a of the burring holder 121, as shown enlarged in (b) of FIG. 7. At this time, the height of the tapping tip 133a inserted into the burring holder 121 is adjustable.

Here, the vertical movement of the tapping processing unit 130 from the tapping tool origin position (h0) to the burring cup insertion position (h4) is performed by the tapping tool additional lifting unit 140. In addition, the vertical movement from the burring cup insertion position (h4) to the basic hole insertion position (h5) and the vertical movement from the basic hole insertion position (h5) to the tapping processing position (h6) are connected to the tapping tool transfer cylinder (134). is carried out by

At this time, when the tapping tool 133 is raised for position alignment, the tapping tool rotating unit 135 does not operate, and when the tapping tool 133 is raised for tapping processing, the tapping tool rotating unit 135 also operates. As it operates, the tapping tool 133 rotates and rises. The operation of the tapping tool rotating unit 135 is performed by a control signal from a control unit (not shown).

The process in which the burring machine 100 according to the present invention having this configuration processes a nut hole in the processed product 10 will be described with reference to FIGS. 2 to 8.

First, as shown in (a) of FIG. 6, the processed product 10 is loaded on the ball caster 113 of the work table 111. The plate surface of the processed product 10 is loaded with the basic hole 11 formed through it at the position where the nut hole is to be formed.

When the processed product 10 is loaded, the tapping tool 133 of the tapping processing unit 130, which was waiting at the burring cup insertion position h4, rises to the basic hole insertion position h5. The tapping tool 133 is raised to the basic hole insertion position (h5) by the tapping tool transfer cylinder 134, and the tapping tip 133a is inserted into the basic hole 11 as shown enlarged in (a) of FIG. 6. After being inserted, it is exposed to the top at a certain height. At this time, the burring holder 121 is located at the burring pin origin position (h1).

Then, the Burring holder 121 descends to the basic hole alignment position (h2) as shown in (b) of FIG. 6. The Burring holder 121 is lowered by the operation of the hydraulic cylinder 125. The lifting rod 125a descends until the second height sensing rings 127, 127a, and 127b detect the sensing tag 125b.

The burring holder 121 is lowered to a position where it touches the upper surface of the processed product 10, and the tapping tip 133a, which protrudes at a certain height above the processed product 10, is inserted into the tool guide hole 121a of the burring holder 121. And the burring holder 121, the basic hole 11 of the processed product 10, and the tapping tip 133a are aligned on the same axis.

When the alignment of the burring portion 120 and the tapping processing portion 130 with respect to the basic hole 11 is completed, the tapping head 131 is moved to the burring cup insertion position (h4) as shown in (a) of FIG. 7. Descend. The lowering of the tapping head 131 is performed by the tapping tool transfer cylinder 134.

And, at the same time as the tapping head 131 is lowered, the hydraulic cylinder 125 operates to lower the burring pin 123, and the burring pin 123 penetrates the basic hole 11 and pressure is applied to burr the hole 13. forms. As shown enlarged in (a) of FIG. 7, the burring pin 123 is vertically inserted into the tool moving hole 115a of the burring cup holder 115 and forms the burring hole 13.

As shown in (b) of FIG. 7, the burring pin 123 forming the burring hole 13 rises to the basic hole alignment position h2. At the same time, the tapping tool 133 rotates and rises from the burring cup insertion position h4 to the tapping processing position h6 and performs tapping processing on the inner wall of the burring hole 13 to form the tab 15. .

At this time, air is simultaneously supplied to the tool rotation air cylinder (135a) and the tapping tool transfer cylinder (134) of the tapping tool rotating unit (135), and the tapping tool (133) rotates and rises by pneumatic pressure to move the tab (15). Process. As shown enlarged in (b) of FIG. 7, when the tapping process is completed, the tapping tool 133 is located at the tapping position (h6).

When the tapping process is completed, as shown in (a) of FIG. 8, the burring portion 120 rises to the burring pin origin position (h1), and the tapping tool transfer cylinder 134 of the tapping tool 133 descends. Then, the tapping tool rotating part 135 rotates in reverse and descends to the burring cup insertion position (h4).

In addition, although not shown in the drawing, when the napped tool 133 performs tapping processing to form the tab 15, as the number of taps 15 increases, the tapping tip 133a is worn, so during tapping processing. Spray oil toward the tapping tip (133a). The oil spray means (not shown) sprays oil toward the tapping tip 133a for a short period of time (about 0.5 seconds) during tap processing.

In addition, an air injection means (not shown) is provided at the upper part of the work table 11 to spray air toward the burring cup holder 115. The air injection means (not shown) supplies air for a set time to remove chips separated from the inner wall of the burring hole 13 after the tapping process.

Then, when the processed product 10 for which burring and tapping processing has been completed is discharged and a new processed product 10 is loaded on the work table 111, the tapping tool 133 is used as a base, as shown in (b) of FIG. 8. It rises to the hole insertion position (h5), and as shown in (a) of FIG. 6, the burring holder 121 descends and the position alignment process is repeated.

As seen above, the burring machine according to the present invention is equipped with a burring part and a tapping processing part at the top and bottom of the work table, so that burring processing and tapping processing can be performed together. Accordingly, when forming a nut hole in a processed product, burring hole processing and tapping processing can be performed sequentially inside one burring machine, which has the advantage of significantly shortening the processing time.

In addition, the burring machine according to the present invention has the advantage of minimizing tapping processing defects because it performs burring and tapping processing after coaxially aligning the burring machine and the tapping machine with the basic hole of the processed product before processing. there is.

In addition, the burring part can be operated by hydraulic pressure and the tapping part can be operated by pneumatic pressure to improve processing efficiency and processing speed.

In addition, there is an advantage that the tapping tool can be exchanged during tapping processing, allowing pitch rotation to match the tap.

The technical idea of the present invention was examined through several examples above.

It is obvious that a person skilled in the art to which the present invention pertains can make various modifications or changes to the above-described embodiments based on the description of the present invention. In addition, even if not explicitly shown or explained, a person skilled in the art may make various modifications including the technical idea of the present invention from the description of the present invention. is self-evident, and still falls within the scope of the present invention. The above embodiments described with reference to the accompanying drawings are described for the purpose of explaining the present invention, and the scope of the present invention is not limited to these embodiments.

10: Processed product 11: Foundation hole
13: Burring hole 15: Tab
100: Burring machine 110: Work frame
111: workbench 113: ball caster
115: Burring cup holder 115a: Tool moving hole
117: upper frame 120: burring part
121: Burring holder 121a: Tool guide
123: Burring pin 123a: Burring pin tip
124: High tension spring 125: Hydraulic cylinder
125a: Elevating rod 125b: Sensing tag
126: Sensor guide axis 126a: Sensing ring bracket
127,127a, 127b: Height sensing ring 130: Tapping processing part
131: Tapping head 132: Tool exchange nut
133: Tapping tool 133a: Tapping tip
133b: Head coupling end 134: Tapping tool transfer cylinder
134a: Air cylinder tube 135: Tapping tool rotating part
135a: Tool rotation air cylinder 135b: Air cylinder piston
135c: Air lifting rod 135d: Ball bearing
135e: Ball screw block 135f: Spur gear
135g: Rotating shaft 135h: External casing
140: Tapping tool additional elevation unit 141: Up-down gear motor
143: LM guide axis 145: Tapping head bracket
150: Hydraulic pump
h0: Tapping tool origin position
h1: Burring pin origin position
h2: Basic hole alignment position
h3: Burring processing position
h4: Burring cup insertion position
h5: Basic hole insertion position
h6: Tapping processing position

Claims (4)

A workbench (111) on which a processed product having a basic hole (11) formed through the upper surface is loaded;
A burring portion 120 that moves up and down from the upper part of the work table 111 toward the work table 111 and forms a burring hole 13 by burring the basic hole 11;
A tapping processing unit ( 130); and
It is provided with a tapping tool additional lifting unit 140 that raises and lowers the tapping head 131,
The burring portion 120 includes a burring holder 121 to which a burring pin 123, which presses the basic hole 11 to form a burring hole 13, is detachably coupled to its lower portion; The burring pin 123 is placed at a burring pin origin position spaced at a certain height on the upper part of the processed product, a basic hole alignment position in contact with the upper surface of the basic hole 11, and the basic hole 11 is pressed to form the burring hole 13. It includes a hydraulic cylinder 125 that elevates to the burring processing position,
The tapping processing unit 130 includes a tapping head 131; A tapping tool (133) provided on the upper part of the tapping head (131) and having the tapping tip (133a) at the upper end; a tapping tool transfer cylinder (134) supporting the tapping tool (133) to be lifted up and down relative to the tapping head (131); It includes a tapping tool rotating unit 135 provided at the lower part of the tapping head 131 and rotating the tapping head 131 forward and backward depending on whether pneumatic pressure is applied,
The tapping tool 133 rises from the tapping tool origin position, the tapping tool origin position to a burring cup insertion position located at the bottom of the work table, and rises from the burring cup insertion position to insert the tapping tip (133a) into the basic hole of the processed product. ) is provided to be able to be lifted between the basic hole insertion position where the burring hole (13) is inserted and the tapping processing position where tapping processing has been completed in the burring hole (13),
The tapping tool additional lifting unit 140 elevates the tapping head 131 between the tapping tool origin position and the burring cup insertion position,
The tapping tool transfer cylinder 134 elevates the tapping tool to the burring cup insertion position, the basic hole insertion position, and the tapping processing position,
The tapping tool rotating unit (135) is a burring machine capable of tapping processing, characterized in that the tapping-only tool rises from the burring cup insertion position to the tapping processing position and rotates the tapping head (131) when performing tapping processing. delete According to paragraph 1,
The burring portion 120,
It further includes a lifting rod (125a) whose length varies depending on the inflow and outflow of the working fluid of the hydraulic cylinder (125) and which is coupled to the burring holder (121),
A burring machine capable of tapping, comprising a plurality of height sensing rings (127, 127a, 127b) provided on the moving path of the lifting rod (125a) and detecting the height of the lifting rod (125a). According to paragraph 3,
The tapping tool rotating part 135,
A tool rotation cylinder (135a) operated by air pressure;
an air lifting rod (135c) that is coupled to the tool rotation air cylinder (135a) and is raised and lowered;
an external casing (135h) surrounding the outside of the tool rotation air cylinder (135a) and the air lifting rod (135c);
A ball screw block (135e) provided to surround the upper part of the air lifting rod (135c) and converting the linear motion of the air lifting rod (135c) into rotational movement;
a ball bearing (135d) that supports rotation of the ball screw block (135e);
A burring machine capable of tapping, comprising a spur gear (135f) provided on the ball bearing (135d) and transmitting rotation of the ball screw block (135e) to the tapping head (131).

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