JPS6348331Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a tool for chamfering holes machined by a drill such as flanges.

Prior Art When holes are drilled for bolt connections on flanges or other parts, burrs and sharp corners of cutting chips are formed on the upper and lower sides of the hole. For this reason, chamfering is performed after drilling. Traditionally, this chamfering process was performed using a pneumatic rotary tool equipped with a chamfer cutter. For example, in the case of a flange, the holes on the front side were first machined one by one, and then after all the holes had been machined. The method was to turn it over and drill holes on the back side. If the object cannot be turned over, the pneumatic rotary tool itself is turned upside down and processed from the bottom.

Problems to be solved by the invention In the conventional machining method as described above, when the number of holes to be machined is small, there is no problem in terms of machining time and labor, but when the number of holes to be machined is large, or However, if the object to be processed is heavy, this becomes a serious problem in terms of time and labor. That is, when the number of holes to be machined is small, even if the overall machining time is twice the machining time for the upper part, the increased time does not pose much of a problem. However, if the number of holes to be machined increases, the difference in time will become very large even if the same amount of time is required.If the upper and lower parts can be machined at the same time, and the time can be saved, the benefits will be large. In addition, if the object to be machined is heavy and the lower side is to be machined, turn the object upside down or place it on a table of an appropriate height and use a pneumatic rotary tool to chamfer the object. The cutter must be turned upside down to process the cutter, but the former method of turning the cutter upside down not only requires more effort, but also requires more time and effort due to the heavy weight of the item. It also decreased. The latter method of pointing the chamfering cutter upward, contrary to the usual method, requires that the pneumatic rotary tool itself is quite heavy, so it is not easy to support it manually, and the fatigue during work is doubled. However, work efficiency decreased and safety became a problem.

The purpose of this invention is to solve the above-mentioned problems and provide a chamfering device that can chamfer the upper and lower surfaces simultaneously, thereby saving time and labor.

Means for Solving the Problems The means of this invention taken to solve the above problems are as follows: (a) At the rear of the main body, there is a rotary switching valve that can be operated manually and is connected to a pneumatic source, and a vertical cylinder. The cylinder has a pair of upper and lower pistons, the piston rods of which protrude upward and downward from the main body.

(b) A pair of upper and lower rotating pedestals are supported by pins in the middle of the main body so as to be able to rotate up and down, and the rear end is connected to the end of the piston rod.

C. The pneumatic rotary tool is attached to a pair of rotating pedestals so that the chamfered cutters of the pneumatic rotating tool protrude from the front end of the rotating pedestals and face each other vertically, and an air supply pipe is connected from the rotary switching valve. thing.

D. The main body is equipped with a fine adjustment jack that regulates the movement of the rotating pedestal, and the lower rotating pedestal and mounting bracket are connected using long holes and bolts so that they can be adjusted up and down. thing.

E. The rotary switching valve can be used to communicate between the air source, the pneumatic rotary tool, and the chamber on the center side of the pneumatic cylinder at the same time, and when only the air source and the chamber on the rod side of the pneumatic cylinder are communicated. I was able to make two choices.

F. The main body is equipped with a hanging bracket for hanging the aircraft and a grip bar for operating the aircraft.

It is.

Function: The chamfering cutters of the pneumatic rotary tools, each attached to a pair of rotating pedestals that can swing up and down, grip the chamfered portions on both sides of the machined hole with the pushing force of the piston, and rotate at the same time. Since it is possible to chamfer a drilled hole on both the upper and lower sides at the same time, it not only cuts the conventional chamfering time in half, but also allows the object to be machined to be reversed when drilling the lower chamfer hole. It is not necessary, saves time and effort, and improves work efficiency.

Embodiment An embodiment of this invention will be described in detail based on the drawings.

Reference numeral 1 denotes a main body, the front part of which is formed into a flat plate shape, with an upper flat plate part A projecting forward and a space below the upper flat part A projecting slightly to the front with a distance sufficient to allow the object to be processed 2 to be inserted freely. It has a lower protrusion (b), a hole 4 in the middle part large enough to accommodate the rotating pedestals 3, 3', and a piston 5 at the rear for operating the rotating pedestals 3, 3'. 5' is inserted into the pneumatic cylinder 6, and further behind it is the pneumatic rotary tool 7,
7', and a rotary switching valve 8 for controlling air supplied to the pneumatic cylinder 6. There are one pair of upper and lower rotating pedestals 3 and 3', both of which are formed in a T-shape, and with the legs C and C' inserted into the holes 4 of the main body 1, the legs C and C' are vertically symmetrical, respectively. The tip of C' is rotatably supported by horizontal pins 9, 9'. Elongated holes 10 and 1 are provided at the rear ends of the rotating pedestals 3 and 3'.
0', and the ends of the rods 11, 11' of the pistons 5, 5' of the pneumatic cylinder 6 are engaged with the elongated holes 10, 10' by pins 12, 12', respectively. 1
3, 13' are the pneumatic rotary tools 7, 7' on the rotating base 3,
3' is a tool mounting bracket for attaching to the upper part 2 and the lower part 3', and a circular hole is drilled between the upper part 2 and the lower part 3'. are tightened with tightening bolts 14 to connect the two together. In addition, the tool mounting bracket 13, 1
The lower part of 3' is formed into a U-shape, and the rotating pedestal 3,
Install it at the front of 3' so that it straddles it,
They are fastened together with a tightening bolt 15, but the bolt hole of the lower tool mounting bracket 13' is formed into an elongated hole 16 so that the position of the bracket 13' can be slightly adjusted up and down. There is. Pneumatic rotary tool 7, 7'
The front part is bent at a right angle, and there are rotating bodies 17, 17' operated by air, and a chamfered cutter 1 is attached to the tip of the rotating body 17, 17'.
8,18' is installed. Further, air pipes 19, 19' are connected to the rear portions of the pneumatic rotary tools 7, 7' from the rotary switching valve 8 at the rear of the main body 1. The rotary switching valve 8 consists of a cylindrical valve body 20 and a handle 21 integrally formed concentrically with the valve body 20. The rotary switching valve 8 is rotatably inserted into a hole 22 in the front and back direction bored in the rear part of the main body 1. A chamber 40 is formed at the left end of the valve body 20, that is, at the innermost part thereof, with a slight gap between the valve body 20 and the main body 1. The valve body 20 has an axial passage 2 in the center.
3 and leading into said passage 23 radial passage 2
4, 25, 26, but the passage 24 is connected to the valve body 20.
It communicates with an annular groove 27 formed on the outer periphery of the main body, and further communicates with an air source 30 via a passage 28 and a pipe 29 provided at the rear of the main body. The passage 25 is a diametrical hole, and the upper side is a passage 31 provided at the rear of the main body 1, and a pipe 19.
The lower side communicates with the pneumatic rotary tool 7 on the upper side through a passage 31' provided at the rear of the main body 1 and a pipe 19'. aisle 26
is a diametrical hole, which is located at a position different from the passage 25 by 90 degrees in the circumferential direction;
It communicates via a passage 35 and a pipe 36 provided at the rear of the pneumatic cylinder with a chamber 37 located between the upper and lower pistons 5, 5' of the pneumatic cylinder. The main body 1 on the outer periphery of the rotary switching valve 8 has two upper and lower axial passages 38, 38' in the middle part between the center and the outer periphery on the left side.
8, 38' open into a chamber 40, and on the right, the passage 38 opens into a radial passage 39 which, via a passage 41 and an axial passage 42, opens on the rod side of the pneumatic cylinder 6. It leads to room 43 and passage 3
8' opens into a radial passage 39';
It also opens into a chamber 43' on the lower rod side of the pneumatic cylinder 6 via a passage 41' and an axial passage 42'. Note that the chamber 40 communicates with the outside air through a passage 51.

Reference numeral 44 is a jack for finely adjusting the distance between the chamfered cutters, and when it is rotated, the head moves slightly up and down, and it is installed at a position corresponding to the upper and lower phases to the left of the hole 4 of the main body 1. are doing. In addition, the main body 1 has pins 45 on both sides of the middle part protruding left and right.
The lower part of a hanging metal fitting 46 is pivotally connected to the pin 45, so that the entire chamfering device can be suspended by the hanging metal fitting 46. Furthermore, one pin 45 is made to protrude long to form a grip bar 47, which can serve as a handle for operating the main body 1 during work.

Figure 9 is an air circuit diagram of the chamfering device of the present invention.
0 is an air source, 8 is a rotary switching valve, 6 is a pneumatic cylinder, and 5 and 5' are pistons.
A check valve 49 and a variable throttle 5 are provided in a passage 48 leading from the air pressure cylinder 6 to the central chamber 37 of the pneumatic cylinder 6.
0 are installed in parallel.

Note that 52 is a drilled hole drilled in the object 2 to be processed, and 53 is a lid of the pneumatic cylinder 6.

The present invention is constructed as described above, and when actually performing chamfering work, the operator operates the main body 1 by holding the grip bar 47 on the side of the main body 1 and the handle 21 at the rear. 1 at a desired position on the object 2 to be processed, the chamfering cutters 18, 18' are opened vertically to facilitate setting on the object 2 to be processed. Operate the handle 21 to switch the rotary switching valve 8 to the G side of the circuit diagram, that is, to the right side. Air from the air source 30 flows in the order of A→B→C→D to the chamber 43 on the rod side of the pneumatic cylinder 6,
43'. That is, air is supplied from the air source 30 to the pipe 29, the passage 28, the annular groove 27,
Chamber 4 through passages 24, 23, 26, 41, 42
3 and acts on the piston 5 to move it downwards, while the other is in the passages 23, 26, 41', 4
2' it reaches chamber 43' and acts on piston 5' to move it upwards. At this time, the chamber 37 between the upper and lower pistons 5, 5' communicates with the chamber 40 through the pipe 36 and the passages 35, 39, 38, and the chamber 40 communicates with the outside air through the passage 51, so that the air in the chamber 37 is released to the outside. In this way, the upper and lower pistons 5, 5' move inward, and the upper rotating pedestal 3 rotates clockwise via the pin 12 at the tip of the rods 11, 11', and the lower rotating pedestal 3' rotate counterclockwise, the upper and lower pneumatic rotary tools 7, 7', which are connected to the rotating bases 3, 3' via the tool mounting brackets 13, 13', have their front parts open vertically. state.
The distance between the upper and lower chamfering cutters 18, 18' becomes larger, allowing them to be easily set on the object 2 to be processed. The upper flat plate part of the front part of the main body 1 is placed on the object 2 to be processed, and its tip is aligned with the center of the hole 52 in the object 2 to be processed. The tip of the upper flat plate part A is the 8th
As shown in the figure, a semicircular notch and a chamfered cutter 1
Since the center of the tip 8 is predetermined to be at the center of the semicircle, when the main body 1 is set, the tip only needs to pass through the center of the hole 52 of the object 2 to be processed. Next, operate the handle 21 to open the rotary switching valve 8.
switch to the left side. The air from the air source 30 is A
→ B → C flows in the order of chamber 37 of pneumatic cylinder 6.
, and simultaneously flows in the order of A→E and A→E' to reach the upper and lower pneumatic rotary tools 7, 7'. That is, from the air source 30 through the pipe 36 to the chamber 37.
reach. At the same time, the upper pneumatic rotary tool 7 is reached via the passages 23, 25, 31 and the pipe 19, and the lower pneumatic rotary tool 7' is reached via the passages 23, 25', 31' and the pipe 19'. operate. Therefore, the pistons 5, 5' move up and down, i.e. outwards, the rods 11, 11' extend, the upper rotating seat 3 rotates counterclockwise, and the lower rotating seat 3' moves clockwise. rotate around. Since the front part rotates inward in this way, the pneumatic rotary tools 7, 7' attached to these rotating pedestals 3, 3' via the tool mounting brackets 13, 13' can rotate inwardly. chamfered cutter 18,
18' rotates until it reaches the hole 52 of the workpiece 2, and chamfers the hole 52. As mentioned before, the center of the hole 52 and the center of the chamfered cutters 18, 18' can be determined by aligning the tip of the upper flat plate A of the main body 1 with the semicircular notch. The depth can be determined by adjusting the height of the adjustment jack 44 provided on the upper flat plate part A and the lower flat plate part B. Also, if the thickness of the workpiece 2 is different, the lower turning Moving pedestal 3'
and a tightening bolt 15 that connects the tool mounting hardware 13'.
Since the chamfering process can be adjusted and determined using the hole 52 and the elongated hole 16, the chamfering process can be performed in an optimal state corresponding to the thickness of the object 2 to be processed, the position of the hole 52, etc. When the chamfering work with the chamfering cutters 18, 18' is finished, operate the handle 21 to switch the rotary switching valve 8 to the right side, and the air from the air source will flow from A to B to C as explained earlier. →Flows in the order of D. That is, the chamber 4 passes through the passages 23, 26, 41, and 42.
3, and also to chamber 43' via 23, 26, 41', 42', and the chamber 37 between pistons 5, 5' is connected to outside air through pipe 36, passages 35, 39, 38, chamber 40, and passage 51. As a result, the pistons 5, 5' and rods 11, 11' move toward the center, and the rotating pedestals 3, 3' and the pneumatic rotary tools 7, 7' attached thereto move toward the center. The front part rotates around the pins 9, 9' to open up and down, and the chamfering cutters 18, 18' at the tips of the chamfering cutters 18, 18' separate from the object to be processed 2, so the chamfering device can be pulled away from the object to be processed 2. ,
Alternatively, you can move on to the next machined hole. The amount of machining by the chamfering cutters 18, 18' is done by adjusting the fine adjustment jacks 44, 44' for the distance between the upper and lower chamfering cutters, but adjustments due to differences in the thickness of the object 2 to be processed can be made using the lower rotating pedestal. This is done by a tightening bolt 15 connecting the tool mounting bracket 13' and the tool mounting bracket 13'. bolt 15
When heated, it becomes an elongated hole 16, so the tool mounting bracket 13' and the pneumatic rotary tool 7' can be moved vertically and parallelly, so the position of the chamfer cutter 18' is adjusted to suit the thickness of the object 2 to be machined. can be determined.

Since the entire chamfering device is quite heavy, the work is carried out by suspending it using a crane or other device using a hanging fitting 46. The main body 1 has a grip bar 47 on the side and a handle 21 on the rear, so it can be operated freely, and the mounting pin 45 of the hanging bracket 46 is located in the middle of the main body 1, near the center of gravity. , the positions of the chamfering cutters 18, 18' can be easily operated without being restricted by weight.

Effects This invention uses pneumatic rotary tools with chamfering cutters arranged vertically to face each other so that chamfering of drilled holes can be performed on both sides at the same time.
The time required for chamfering can be cut in half compared to the time required for conventional chamfering, which not only improves work efficiency, but also reduces the time required for chamfering the bottom surface of machined holes. Previously, the rotary tool was reversed and the chamfering cutter faced upward, or the object to be machined was turned upside down and chamfered, but this is no longer necessary. This saves time and effort, and improves work efficiency. In particular, in the case of large objects to be processed, it was necessary to use a crane or install special equipment to turn them over, but this is very advantageous as these are no longer necessary. .

In addition, in the conventional method, the amount of chamfering of the machined hole relied on the operator's sense, but with this invention, it can be regulated in advance, making the work easier and making the amount of chamfering uniform. This is beneficial to both the operator and the object to be machined. Furthermore, the pneumatic rotary tool not only can be freely rotated by a pneumatic cylinder, but also has a chamfering cutter that is pressed with a constant force, making the work easier and the machining speed faster.

[Brief explanation of the drawing]

The drawings are all embodiments of the present invention, but the first
The figure is a vertical front view, Figure 2 is an enlarged view of part K in Figure 1, Figure 3 is a sectional view taken along H-H, Figure 4 is an enlarged sectional view taken along I-I, and Figure 5 is an enlarged cross-section taken along J-J. Figure 6 is a diagram showing the state when the valve body is rotated 90 degrees in Figure 4, Figure 7 is in Figure 5, Figure 8 is a plan view of the tip of the main body, Figure 9 is a pneumatic circuit diagram. 1...Body, 5...Piston, 6...Pneumatic cylinder, 7...Pneumatic rotary tool, 8...Rotary switching valve,
11...rod, 18...chamfered cutlet, 37...
Chamber, 43... Chamber, 44... Fine adjustment jack.

Claims (1)

[Scope of utility model registration request] The front part has an upper and lower bifurcated shape, and a pair of rotating pedestals are opposed and pivotally supported on the upper and lower sides of the middle part, and the rear part has a cylinder for a cylinder that almost coincides with the swinging direction of the rotating pedestals. a flat body provided with a hole, an insertion hole for a rotary valve, and an air passage communicating with the insertion hole;
A pair of pistons is slidably fitted into the cylinder hole of the main body, and the end of the piston rod is connected to one end of the rotating pedestal. a rotary switching valve that switches and supplies the air source simultaneously to the intermediate chamber at the top of the pair of pistons and to the pneumatic tool, and only to the rod side chamber of the pair of pistons;
A pneumatic rotary tool protrudes from the front part of the chamfer cutter body attached to the rotary tool, and is attached to the pair of rotary bases so as to face each other, and rotates with the upper and lower surfaces of the body. Between the pedestal and the
A machined hole chamfering device comprising a fine adjustment device for regulating the amount of rocking of the rotating base.