JPS6049524B2 - Multi-spindle drilling machine with replaceable spindle head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-spindle drilling machine with a freely replaceable spindle head.

With a tufted drilling machine, the position of the spindle that holds the drill at the lower end must be changed every time the arrangement of the holes to be drilled on the workpiece changes, but as the number of holes to be drilled increases, many of them must be displaced. Otherwise, adjusting the position of each spindle requires a great deal of time and effort.

This invention is suitable for such cases by providing a spindle head that is replaceable, and by providing a plurality of spare spindle heads on a guide rail, so that while one spindle head is in operation, the spare spindle head can be replaced. The purpose of the present invention is to provide a multi-spindle drilling machine with a freely replaceable spindle head, which allows the spindle arrangement to be adjusted to a desired arrangement, and which can be replaced with a used spindle head in a short time, allowing machining to be performed using a rotary tool. do. The configuration of a multi-spindle hole machine with a freely replaceable spindle head will be explained based on an embodiment shown in the drawings. 1'' and vertically supports a main shaft 3 having a clutch piece 2 at the lower end, the driving part A is engaged with a vertical guideway 5 on one side of the support column 4, and a fluid fixed to the support column 4 is engaged. The piston rod a'' of the drive cylinder a and the hanging frame part A'' from the driving part A are integrated to be movable up and down. A cylindrical guide rail C for guiding the movement of B is provided horizontally, and a portion C1 of the guide rail C on the side where the driving unit A moves up and down (see FIGS. 1 and 2) is
It is separated from the other part C2 and is provided integrally with the hanging frame part A'' of the driving part A, and a cylindrical body 6 is provided on the outer periphery of the guide rail, as shown in FIG. It is equally divided in the generatrix direction and divided into a plurality of divided pieces 7, each of which can be moved by being engaged with the upper edge of the guide rail C by a mechanism to be described later. 8 to the replacement tufted spindle with one protruding pair.
A tube conveyor D is provided, and the dividing surface 11 (see Fig. 3) of each divided piece 7 is arranged so that even when one divided piece 7 descends from another divided piece 7 and is mutually infiltrated, it remains in sliding contact with each other. ) An engaging piece E (to be described in detail later) that can maintain the relative position as each divided piece 7 in the cylindrical body 6 is provided in the vertical direction, and is a replacement piece that can be attached to the support arm 8 of the replacement tufted spindle head carrier D. The tufted spindle head B (see spindle head B visible on the right side in FIG. 1) is provided with a rotating main shaft 10 of the tufted spindle having a clutch piece 9 that can engage with the clutch piece 2 at the lower end of the main shaft 3 of the driving section A. As shown in FIG. 1, the driving unit A is further provided with a clamp device F on the bottom surface of the cylindrical guide rail C, in which the lower ends of the spindle rods 13 of the plurality of fluid drive cylinders 12 form T-shaped ends. The shaft 17 (fifth
(see figure) is provided on the shaft, and the locating pin operating section 18 and the clutch piece 2 on the drive unit A side are elastically pressed against the clutch piece 9 on the replacement tufted spindle head B side via a coil spring 20. A clutch actuating section 19 and a rotary valve 1'' that operates to send pressure oil to the fluid drive cylinder 12 of the clamping device F are provided, and the locating pin actuating section 18 is provided on the upper surface of the replacement tufted spindle head B. A fitting hole 22 for the locate pin 21 to be lowered;
A concentric circle T centered on the center 0 of the cylindrical guide rail C into which the lower end of the piston rod 13 is fitted.
It has mold grooves 24 and 23 formed therein.

The mechanism by which the spindle head carrier D rides on the guide rail C is as shown in FIG. 4, as shown in FIG. 26 and the spindle head carrier D
The upper part of the guide rail C is held between a trochanter 28 provided vertically within the window 27 of the outer wall D'' and a trochanter 30 provided vertically at the lower edge of the inner wall 29, and the lower edge of the outer wall D'' is provided with a trochanter 31.

In addition, as shown in FIG. 3, the engaging portion E is provided with a guide rail e1 having a length extending vertically through the upper and lower parts of the divided piece 7 on one divided surface 11 of the divided piece 7. L-shaped engaging pieces E2 and e3 that come into contact with the guide rail e'' are provided on the upper and lower parts of the other divided pieces that are in contact with the guide rail e'', so that even if one of the divided pieces 7 falls, the third As shown in the figure, the engaging pieces E2 and e3 engage with the guide rail e1, so that the relative position of the divided piece 7 in the cylindrical body 6 is maintained.
Below the replacement tufted spindle head carrier D, an arm 34 protrudes toward the column 4 from the replacement tufted spindle head B, and the arm 34 has a dog 35 at its lower end for determining the lowering limit of the spindle head B. A threaded rod 37 having a dog 36 for switching to cutting feed which can be freely adjusted up and down is vertically installed in the middle of the rod 4, and the lower limit of the replacement tufted spindle head B at the processing position is determined. A limit switch 33 is provided at a position where it can cooperate with the cutting feed dog 35, and a hydraulic flow rate adjustment valve 38 for cutting feed that comes into contact only with the switching dog 36 for cutting feed. A limit switch 32 is provided in a part of A that cooperates with a vertically adjustable dog 32'' for determining the upper limit, and the upper and lower limit switches 32 and 33 are arranged in three positions in the hydraulic circuit as shown in A four-boat spring offset electromagnetic switching valve 39 and a hydraulic flow rate adjustment valve 38 for cutting feed are provided in a deceleration hydraulic circuit 43 having a throttle valve 42 with a check valve 41 provided in the return pipe 40 of the cylinder. It was established.

Since this embodiment has the configuration as described above, now,
As shown in FIG. 6, it is assumed that a spindle head B is attached to the driving unit A, and that the drilling process by this spindle head B has been completed.

That is, assuming that the use of the spindle head B1 in FIG.
is rotated counterclockwise in FIGS. 1, 5, and 6. In such a case, as clearly shown in FIG. 5, both of the locate pins 21 come out of the locate pin fitting holes 22, 22 at the upper part of the spindle head B1, and the clutch pieces 2
is separated from the clutch piece 9. At this time, the fluid operating portion 18'' at the end of the shaft 17 applies hydraulic pressure to the upper part of the fluid-driven cylinder 12 of the clamping device F to lower the piston rod 13, so that the tension by the T-shaped end at the end of the piston rod 13 is released. , the T-shaped end is the T-shaped groove 2 on the upper part of the spindle head B1.
It fits loosely into 3 and 24. Therefore, when the spindle head B2 is manually moved in FIG. 7, a plurality of spindle heads B1 to B4 (in this embodiment, four
) The replacement tufted spindle head carrier D attached to one pair of support arms 8, 8 of each divided piece 7 is attached to a cylindrical guide rail C with trochanters 26, 28, 30 shown in FIG. Holding the upper edge, the lower roller 31 rotates lightly while being supported by the outer periphery of the guide rail C, and in FIG. The T-shaped end of the protruding piston rod Fl3 fits into the T-shaped grooves 23 and 24 on the spindle head 8 and comes directly below the driving part A. So handle 16 and the previous and reverse,
When rotated clockwise in FIGS. 1, 5, and 6, each locate pin 21 has a conical tip, so even if the stop position is slightly deviated, it can be easily located on the spindle head B2. The locating pin fits into the locating pin fitting hole 22, positioning is performed first, and then the clutch piece 2 and the clutch piece 9 are engaged. Even if the teeth of the clutch pieces 2 and 9 do not match, the clutch piece 2 is elastically pressed by the clutch piece 9, so that it will adapt immediately when the motor 1 is started. Next, in order to move on to machining, fluid is supplied to the fluid drive cylinder a, and as the driving part A descends, a part C1 of the guide rail C provided integrally with the hanging frame part A'' of the driving part A only descends.

one. When the section C1 descends, the divided piece 7 of the replacement tufted spindle head carrier D riding on the section C1 descends as shown in FIG. 3, and the spindle head 8 descends to perform the desired drilling process. . The segment 7 that descended at this time and the other segment 7 that did not descend are guide tracks! Article e1 and engaging pieces E2, e3
Since the relative positions of the divided pieces on the cylinder 6 are reliably maintained, the drilling process is completed, the driving part A is raised, and the part C1 of the guide rail C is slidably engaged. When it rises, the divided piece 7 also rises, and both return to their original positions.
The descending divided piece 7 is a divided piece that does not descend again and the cylindrical body 6
Therefore, the replacement tufted spindle head carrier D
can rotate smoothly on the guide rail C, and therefore the spindle heads can be brought one after another directly below the driving section. In addition, each replacement tufted spindle head B has a lower limit determining dog 35 that can cooperate with the limit switch 33 provided on the support column 4 and the hydraulic flow rate adjustment valve 38 for cutting feed, and a dog 36 for switching to cutting feed. Therefore, when the spindle head B descends, the dog 35 falls not only against the flow rate adjustment valve 38, but also because the dog 36 hits the flow rate adjustment valve 38, so that the cylinder a
Only the throttle valve of the deceleration hydraulic circuit 43 in the return side piping 4-0 operates to enter the cutting feed, and when the dog 35 operates the limit switch 33, the 4-boat spring offset solenoid switching valve 39 is operated, and the pressure oil is the deceleration hydraulic circuit 4
It passes through the check valve 41 of No. 3 and is sent to the lower part of the cylinder a.
When the spindle head is raised and the dog 32'' hits the limit switch 32, the electromagnetic switching valve 39 is actuated to stop or lower the valve, and each spindle head B is provided with at least a lower limit determining dog 35. For example, when it is necessary to drill holes A, C, C, and D of different depths in a workpiece as shown in Fig. 9, the position of the dog 35 of each spindle head B can be adjusted. Then, you can drill hole A with the drill of spindle head 2, hole opening with the drill of spindle head B2, hole C with the drill of spindle head 8, and hole 2 with the drill of spindle head B4. As shown in the figure, when the machining surface of the workpiece has steps like A and B, by adjusting the position of the switching dog 36 for each cutting feed, the machining surface A or B can be adjusted in each drilling process. Cutting feed can be started without waste when approaching the part B.

Since this invention has the above-mentioned structure and operation, even in machining operations where the arrangement of a large number of rotary tools must be changed one after another, the rotation of the spindle head of the spindle head can be controlled while one machining operation is being performed. The tool arrangement can be prepared as desired, and the spindle head can be replaced almost instantly, and the spindle head can be transferred easily by hand, when drilling holes of different depths in the workpiece. This has the remarkable effect that even when there are steps on the surface to be machined, the cutting feed can be carried out without waste, and that the hole can be drilled efficiently depending on the depth and shallowness of the hole.

[Brief explanation of drawings]

The drawings show an embodiment of a multi-spindle drilling machine with a replaceable spindle head according to the present invention, and FIG. 1 is a partial perspective view showing the arrangement of the main parts, FIG. 3 is a perspective view of the replacement tufted spindle head carrier, FIG. 4 is a longitudinal cross-sectional view showing the structure of the part where the tufted spindle head carrier rides on the guide rail, and FIG. 5 is a perspective view of the replacement tufted spindle head carrier. Fig. 6 is a partially longitudinal front view, Fig. 7 is a plan view, Fig. 8 is an explanatory diagram showing the relationship between each dog and the hydraulic circuit, and Fig. 9 is a diagram of the dog of each spindle head. Explanatory diagrams of how to use each are shown, 1 is the motor,
2 is a clutch piece, 3 is a main shaft, 6 is a cylindrical body, 7 is a divided piece,
8 is a support arm, 9 is a clutch piece, 10 is a rotating main shaft, 11 is a dividing surface, 12 is a fluid drive cylinder, 13 is a piston rod, 14 and 15 are circular arcs, 16 is a handle, 17 is a shaft,
18 is a locate pin operating section, 1' is an operating section, 19 is a clutch operating section, 21 is a locate pin fitting hole, 22, 23
is a T-shaped groove, 34 is an arm, 35 is a lower limit determining dog, 36
38 is a hydraulic flow rate adjustment valve for cutting feed, A is a moving part, B is a spindle head, C is a switching dog for cutting feed.
1 shows a guide rail, and D shows a replacement tufted spindle head carrier.

Claims (1)

[Scope of Claims] 1. A driving part A, which is rotated by a motor 1 and vertically supports a main shaft 3 having a clutch piece 2 at its lower end, is provided on one side of a column 4 so as to be able to rise and fall freely; A cylindrical guide rail C for guiding the movement of the replacement tuft-type spindle head B is provided horizontally around a part of Part C_2 is separated and provided integrally with the driving part A, and on the outer periphery of the guide rail C, a cylindrical body 6 is equally divided in the generatrix direction and divided into a plurality of divided pieces 7. A replacement tufted spindle head carrier D is provided on the outer surface, which can be moved by engaging with the upper edge of the guide rail, and from which a pair of replacement tufted spindle head support arms 8 are protruded horizontally on the outer surface, and each divided piece 7 is separated. The surface 11 is provided with a guide rail e_1 and an engagement piece e that comes into sliding contact with the rail e_1 so that one divided piece 7 can descend between the other adjacent divided pieces 7, 7.
The replacement tufted spindle head B, which can be mounted on the support arm 8 of the replacement tufted spindle head conveying body D, has the driving portion A A multi-spindle drilling machine with a freely replaceable spindle head, characterized in that it is provided with a rotating main shaft 10 of a tufted spindle having a clutch piece 9 that can engage with a clutch piece 2 at the lower end of the main shaft. 2. A driving part A, which is rotated by a motor 1 and vertically supports a main shaft 3 having a clutch piece 2 at its lower end, is provided on one side of a column 4 so as to be able to rise and fall freely, and a part of the column is attached to the column 4 as a center. A cylindrical guide rail C for guiding the movement of the replacement tufted spindle head B is provided horizontally, and a part C_1 of the guide rail C on the side where the driving part A goes up and down is separated from the other part C_2. A cylindrical body 6 is equally divided in the generatrix direction on the outer periphery of the guide rail into a plurality of divided pieces 7, each of which is provided integrally with the driving section 1. A replacement tufted spindle head carrier D is provided which can be moved by engaging with the upper edge and has a pair of replacement tufted spindle head support arms 8 protruding horizontally from its outer surface, and on the dividing surface 11 of each divided piece 7, Split piece 7
so that it can descend between the other adjacent divided pieces 7, 7,
Guide rail e_1 and engagement piece e_2 that slides into contact with the guide rail e_1
, e_3 are provided to protrude vertically upward and downward from the divided piece 7, respectively, and the replacement tufted spindle head carrier D
Replacement tufted spindle head B that can be attached to the support arm 8 of
is provided with a rotating main shaft 10 of a tufted spindle having a clutch piece 9 that can engage with the clutch piece 2 at the lower end of the main shaft 3 of the driving unit A, and the driving unit A further includes a plurality of fluid drive cylinders 12 on the bottom surface. A clamping device F in which the lower end of the piston rod 13 forms a T-shaped end is installed so that it is on the arc of two concentric circles 14 and 15 centered on the center O of the cylindrical guide rail C, and a separate handle is attached. 16 is provided, and the shaft 17 is provided with a locating pin actuating portion 18 and a clutch actuating member that elastically presses the clutch piece 2 on the drive unit A side against the clutch piece 9 on the replacement tufted spindle head B side. 19 and a rotary valve section 18' that operates to send pressure oil to the fluid-driven cylinder 12, and a locate pin 21 that is lowered by the locate pin operating section 18 is provided on the upper surface of the replacement tufted spindle head B. A fitting hole 22 and concentric T-shaped grooves 23 and 24 centered on the center O of the cylindrical guide rail into which the T-shaped end of the piston rod 13 is fitted are formed. Multi-spindle drilling machine with freely replaceable spindle head. 3. A driving part A, which is rotated by a motor 1 and vertically supports a main shaft 3 having a clutch piece 2 at its lower end, is provided on one side of a support 4 so as to be able to rise and fall freely, A cylindrical guide rail C for guiding the movement of the replacement tufted spindle head B is provided horizontally, and a part C_1 of the guide rail C on the side where the driving part A goes up and down is separated from the other part C_2. A cylindrical body 6 is equally divided in the generatrix direction on the outer periphery of the guide rail C into a plurality of divided pieces 7, each of which is provided integrally with the driving section A. A replacement tufted spindle head carrier D is provided which can be moved by engaging with the upper edge and has a pair of replacement tufted spindle head support arms 8 protruding horizontally from its outer surface, and on the dividing surface 11 of each divided piece 7, The guide rail e_1 and the engaging pieces e_2, e_3 that are in sliding contact with the rail e_1 are both placed above and below the divided piece 7 so that one divided piece 7 can descend between the adjacent divided pieces 7, 7. The replacement tufted spindle head B, which is provided vertically and protrudes and can be attached to the support arm 8 of the replacement tufted spindle head carrier D, has a clutch piece 9 that can engage with the clutch piece 2 at the lower end of the main shaft of the driving section A. An arm 34 is provided below the replacement tufted spindle head carrier D from the replacement tufted spindle head B and protrudes toward the column 4, and the arm 34 has a lower end. The dog 35 for determining the lower limit of the spindle head B,
A threaded rod 37 having a dog 36 for switching to cutting feed which can be adjusted up and down is vertically installed in the middle, and the lowering limit determining dog 35 of the replacement tufted spindle head in the processing position is attached to the support 4. A cutting feed hydraulic flow control valve 38 is provided at a position where it can cooperate with the limit switch 33 and the cutting feed switching dog 36, and is provided in the upper part of the column 4. A limit switch 32 is provided which cooperates with a freely adjustable lift determination dog 32', and the upper and lower limit switches 32 and 33 act as switching valves of the hydraulic circuit of the lifting cylinder a of the driving unit A, and also act as hydraulic pressure for cutting feed. A multi-spindle drilling machine with a freely replaceable spindle head, characterized in that the type flow rate adjustment valves 38 are respectively provided in the return side piping of the cylinder 6. of