JPH03264204A - Hole processing machine - Google Patents

Abstract

PURPOSE:To prevent vibration of a quill and to enable the processing of a high roundness even in the case of a long quill, by pivotally supporting the quill on plural support members projected downward from a canopy and engaging the quill with the power transmission member held on the canopy. CONSTITUTION:Positioning pins 38a 40a are engaged with holes 35c, 35b by carrying a cylinder block 35 into the canopy 19 lower part and ascending a lift body 37, ascended to the insertion position of a quill 17 and the cylinder block 35 is interposed with a stopper 45 and support metals 38, 39, 40. The quill 17 is then advanced, the keygrooves provided on the key thereof and the bush of a power transmission member 32 and support member 22 are located at the lower part and the key grooves of the bushes of support members 24, 25, 23 are opposed. The quill 17 is penetrated therein, pivotally supported on the support members 23, 24, 25 and inserted into a cam hole. The cylinder block 35 is positioned with its ascending to the position where the center line of the cam hole coincides with the axial line of the quill 17 by slightly ascending the lift body 37 after the stoppage of the quill 17 at the advance end, feeding is given to the quill 17 by rotating the power transmission member 32 and the cam hole is subjected to boring.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a hole machining machine for machining cam holes for supporting a camshaft formed in a cylinder block of an engine. [Prior Art] A conventional hole machining machine will be explained with reference to FIG. In FIG. 6, l is a shaft head that rotatably supports the main shaft 2, and is configured so that driving force is transmitted to the main shaft 2 from an electric motor 3 provided on the shaft head l. The shaft head 1 is supported on a support 4, and the support 4 is configured to be moved forward and backward in the axial direction of the main shaft 2 by a feeding device. A proximal end of a quill 5 is connected to the distal end of the main shaft 2, and a plurality of cutting tools (bites) 6 protruding from the outer peripheral surface of the quill 5 are attached at required intervals. In order to poll the cam holes of the cylinder block, which is the workpiece, with the conventional hole drilling machine configured as described above, the cylinder block is carried in front of the support base 4 with the shaft head l in a retracted state, and the shaft The head 1 is advanced to insert the quill 5 into a plurality of cam holes formed in the cylinder block. In this state, the electric motor 3 is driven to rotate the quill 5 via the main shaft 2, and the shaft head 1. By moving the main shaft 2 and the quill 5 forward together, a cutting tool 6 attached to the quill 5 polls a plurality of cam hole walls at the same time. After this machining is completed, the shaft head 1 is moved back, the quill 5 is pulled out from the cam hole, and the cylinder block is carried out to the next process.

[Problems to be solved by the invention]

In the conventional hole drilling machine configured as described above, vibration occurs due to the imbalance between the shaft head 1 and the quill 5, and this vibration causes the shaft head 1 to move toward the quill 5 as shown by the arrow (a) in FIG. It may vibrate largely in the left-right direction perpendicular to the axial direction, and may also vibrate small in the vertical direction as shown by the arrow (C). As a result, the tip of the cutting tool 6 attached to the quill 5 moves in an elliptical manner, making it impossible to obtain sufficient roundness in the polled cam hole, resulting in a flat elliptical hole. When the length is long, the above-mentioned problems become more serious. The present invention solves the above-mentioned problems, and provides an inexpensive hole processing machine that can prevent the vibration of the quill during processing and perform hole processing with high roundness even when the quill is long. The purpose is to

[Means to solve the problem]

The hole drilling machine of the present invention has a reciprocating member provided in the feeding device.
The proximal end of the quill, which is equipped with a cutting tool protruding from the outer circumferential surface, is connected via a coupling so that it can move and rotate freely in a direction intersecting the axial direction. A plurality of support members spaced apart from each other in the direction protrude downward, the quill is pivotally supported on these support members so as to be rotatable and removable, and a power transmission member rotated by an electric motor is rotatably held on the canopy. let me,
The quill is engaged with the power transmission member so as to be movable in the axial direction, and rotational force is transmitted from the power transmission member to the quill.

[For use]

In the hole drilling machine of the present invention, the base end of the quill is movably connected to the reciprocating member of the feed device via a coupling in a direction intersecting the axial direction, and the rotation of the electric motor is transmitted by holding the rotation of the electric motor in the canopy. Since the transmission is transmitted to the quill by the member, it is possible to avoid installing an electric motor for rotating the quill in the advancing/retracting member, and the advancing/retracting member is less likely to vibrate during processing, and the distance between the advancing/retracting member and the quill is reduced. Can block vibrations. In addition, since the quill is supported at multiple points separated from each other in the axial direction of the quill, such as the two points near the proximal end and the tip end, by supporting members that protrude downward from the canopy, the length of the quill is supported. Even if the quill becomes long, it can be reliably pivoted at two or more places, and vibrations can be prevented from occurring in the quill. In addition, the power transmission member rotated by the electric motor can be held on the canopy, and the power transmission member Since the rotational force is transmitted from the quill to the quill, the weight of the rotating part can be reduced, the balance can be easily adjusted, and this also makes it difficult for the quill to vibrate. Furthermore, since a feed device without a main shaft is sufficient, the structure can be simplified. [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In FIG. 1, 11 is a bed, and this bed 11
A feeding device 12 is provided on one side of the . In the feeding device 12, a reciprocating member 14 is fixedly supported on a support base 13 fixed on the bed 11 so as to be horizontally reciprocatable in the left-right direction in FIG.
The cylinder 15a of the feeding cylinder mechanism 15 is mounted on the support base 13.
is fixed, and the piston 15b is fitted into the cylinder 15a.
A reciprocating member 14 is fixed to the tip end of the retractable member 14 . The base ends of left and right quills (boring bars) 17 are connected to the front end of the upper surface of the reciprocating member 14 located above the support base 13 through a pair of left and right couplings 16 in a direction intersecting the axial direction. They are connected to allow some movement and to be rotatable around an axis. The left and right quills 17 extend horizontally to the left in FIG. 1 parallel to each other, and as shown in FIGS.
8 is removably fixed, and a cutting edge 18a of the cutting tool 18 protrudes from the outer peripheral surface of the quill 17. A canopy 19 is arranged above the other side of the bed 11, and the canopy 19 is fixed onto the bed 11 by a plurality of supports 20 via a vibration isolation member 21. As shown in FIGS. 2, 3, and 4, support members 22.
23, 24, and 25 hang down with a space between them, and left and right bearings 26 are provided at the lower end portions of the support members 22, 24, and 25 located below the canopy 19, respectively. Bearing 26
A bushing 27 is held inside so as to be rotatable around a shaft.
A bushing 28 is rotatably held directly on the support member 23. Bushings 27. of support members 24, 25.23.
27 and 28 are arranged on an axis that coincides with the axis of the quill 17 so that the quill 17 can be inserted and removed freely, and the bush 27 of the support member 22 is inserted so that the quill 17 can be moved in the axial direction and rotate integrally with each other. It is located. A machine stand 29 is fixed between the support stand 13 on the bed 11 and the ceiling 119, and an electric motor 30 is fixed on the machine stand 29. Drive-side pulley 3 provided on the shaft 30a of the electric motor 30
1 and a power transmission member 32 consisting of a driven pulley. The power transmission member 32 is coaxially connected to the bearing 26 of the support member 22 at the rear end so that it can rotate together. Further, as shown in FIG. 3, the quill 17 has a key 34 along the axial direction of the cutting tool 1.
The key 34 protrudes from the outer circumferential surface of the quill 17 to be shorter than the cutting edge 18a of the cutting tool 18, and also engages with a key groove (not shown) provided on the inner circumferential surface of the power transmission member 32, The quill 17 is axially movable relative to the power transmission member 32. Note that both the left and right power transmission members 32 are rotated by one electric motor 30, and the third
As shown in the figure, the key 34 is configured to engage in key grooves 27a, 28a provided on the inner peripheral surface of the bushings 27,28. As shown in FIGS. 2, 3, and 4, below the canopy 19 are front and rear transfer bars 36 for loading and unloading a cylinder block 35 of an automobile engine, which is a workpiece. A positioning bin 36a is provided on the transfer bar 36 and protrudes from the transfer bar 36. At the upper end of the elevating body 37 that supports the cylinder block 35 and is moved up and down the transfer bar 36, support bars 38, 39, and 40 for the rear, middle, and front parts are provided. Support money 3
Positioning bins 38a and 40a are provided protrudingly on 8.40. The elevating body 37 is supported by a column 20 fixed to the lower surface of the canopy 19 so as to be movable up and down. One end of a swinging member 42 is connected to the lower end of the elevating body 37, and the swinging member 42
The middle part of the swing member 42 is pivotally supported by a lower horizontal member 43 fixed between the pillars 20, and the other side part of the swing member 42 is supported by a lifting cylinder mechanism 44.
The cylinder 44a of the lifting cylinder mechanism 44 is fixed on the canopy 19. Stoppers 45 are supported at multiple locations in the front-rear direction of the canopy 19 so as to be movable up and down.
6 to a piston (not shown) of a stopper operating cylinder mechanism 49, and a cylinder 49a of the stopper operating cylinder mechanism 49 is fixed on the canopy 19. Knock pins 47 are provided at a plurality of locations on the lower surface of the canopy 19 to protrude downward and position the cylinder block 35 at 111. A plurality of push rods 48 are supported on the ceiling 119 so as to be movable up and down, and the upper portions of the push rods 48 are connected to one end of a swinging member 51 via a connecting member 50, as shown in FIG. The middle part of the moving member 51 is pivotally supported by the canopy 19, and the other end of the swinging member 51 is connected to the piston 52b of the push rod operating cylinder mechanism 52.
Two cylinders 52a are fixed on the canopy 19. Recessed portions 27b of bushes 27, 27.28 of support member 24.2523 at the intermediate portion, near the front end, and at the front end. Notches 53, 53° 53 are supported on the canopy 19 so as to be movable up and down, corresponding to the notches 53, 27b and 28b, respectively.
The upper end of 53.53 is connected to the piston 55b of the notch operating cylinder mechanism 55 via the connecting member 54, and the cylinder 55a of the notch operating cylinder mechanism 55 is connected to the canopy 19.
Fixed on top. The cylinder block 35 includes:
Positioning holes 35a, 35b, 35c into which the positioning pins 36a, 38a, 40a are removably fitted are opened on the lower surface, and dowel holes 35d into which the knock pin 47 is removably fitted are opened on the upper surface. moreover,
Projections 35e are provided at multiple locations in the longitudinal direction of the upper part of the cylinder block 35, and left and right cam holes 35f for supporting the left and right camshafts are formed through the projections 35e in the front and rear direction, respectively. ing. Note that the pins 36a, 38a, 40a, 47, stopper 45, hole 35
a, 35b, 35c, 35d, 35f, etc. are provided at two locations in the left and right direction as appropriate. Next, the operation of the hole drilling machine according to this embodiment will be explained. First, the reciprocating member 14 is located at the retracting end, the quill 17 engages with the power transmission member 32, passes through it, engages with a bushing provided on the support member 22 at the rear end, and from this bushing the quill 17 The motor 30 stops at a position where the tip does not protrude.
Also keep it stopped. Further, the elevating body 37 is lowered, and the support metal 38°39.40 and the positioning pin 38a
, 40a are located below the transfer bar 36, and the notches 53, 53, 53 are lowered to the middle, near the front end. Bushes 2 provided on the front end support members 24, 25, 23
7, 27.28, respectively, to restrain the rotation of the bushes 27, 27.28,
The plurality of push rods 48 are raised, and the stopper 45 is kept in a lowered state. In the above-described state, the positioning pins 36a are fitted into the positioning holes 35a by the transfer bar 36, and the cylinder block 35, which is the workpiece, is carried to a predetermined position below the canopy 19. Next, the lifting cylinder mechanism 44
, the piston 44b is lowered, the elevating body 37 is raised via the swinging member, and the lower surface of the cylinder block 35 is supported by the supports 38° 39.40 provided on the elevating body 36, and the positioning pin 38a, 40a is fitted into the positioning holes 35b and 35c of the cylinder block 35. As the elevating body 37 continues to rise, the upper surfaces of the supports 38, 39° 40 are moved above the transfer bar 36, and these positioning pins 36a are inserted into the positioning holes 3 of the cylinder block 35.
Pull it out from 5a. Quill 17 with cylinder block 35
The cylinder block 35 is raised to the insertion position, the upper surface of the cylinder block 35 is brought into contact with the lower surfaces of the plurality of descending stoppers 45, and the cylinder block 35 is held between these stoppers 45 and the supports 38, 39, and 40. In this state, the cylinder block 35 has protrusions 3 provided at multiple locations in the front and back direction.
A line connecting the centers of the cam holes 35f of the quill 17 is located slightly below the axis of the quill 17 and parallel to the direction in which these axes extend. Note that the knock hole 35d of the cylinder block 35 is shallowly fitted into a knock pin 47 provided in the canopy 19. Here, the feeding cylinder mechanism 15 is operated to move the piston 15b forward, thereby moving the quill 17 forward horizontally. Since the shaft 30a of the electric motor 30 and the power transmission member 32 are designed to stop at predetermined positions in the circumferential direction, the quill 17
key and power transmission member 32, rear end support member 22
The keyway provided in the bushing is located at the bottom. These key grooves are opposed to key grooves 27a, 27a, and 28a provided in the bushes 27, 27, and 28 of the support members 24, 25, and 23 at the intermediate portion, near the front end, and at the front end. , 27.28 is notch 53°53.53
Rotation is constrained by the coherence of . Therefore, when the quill 17 moves forward, the bush 27.
27, 28, and support members 23, 2 through these.
4.25, and the cylinder block 35
It will be inserted into the cam hole 35f. The key 34 of the quill 17 then engages with the keyways 27a, 27a, 2Ba of the bushes 27, 27, 28. Note that the key 34 of the quill 17 and the cutting edge 18a of the cutting tool 18 attached to the quill 17 are connected to the cam hole 35f of the cylinder link 35.
Penetrate through and approach the rear of these. After stopping the quill 17 at the forward end, the elevating body 37 and the stopper 45 are slightly raised to move the cylinder block 35 into the cam hole 3.
The cylinder block 35 is raised to a position where the line connecting the centers of the quills 5f coincides with the axis of the quill 17, that is, to a position where the cylinder block 35 abuts a fixed abutment 80 provided on the lower surface of the canopy 19. Note that in this position, the dowel hole 3 of the cylinder block 35
5d is deeply fitted into the knock pin 47 provided on the canopy 19,
Cylinder block 35 is positioned relative to canopy 19. After that, actuate the notch operation cylinder mechanism 55,
The notches 53, 53, 53 are pulled up above the bushes 27, 27, 28 via the connecting member 54, making them rotatable together with the quill 17. In this state, the electric motor 30
from the shaft 30a of the drive pulley 31. By rotating the power transmission member 32 via the endless belt 33 and operating the feed cylinder mechanism 15 again to feed the quill 17 in the forward direction, the cutter 18 cuts the cam hole 35f of the cylinder block 35. Poling the wall. After finishing the machining and the cutting tool 18 comes out in front of the cam hole 35f, the feeding cylinder mechanism 15 and the electric motor 30 are stopped. In this state, the stopper operation cylinder mechanism 49 is activated to slightly lower the stopper 45, and the lifting cylinder mechanism 144 is activated to slightly lower the lifting body 37, thereby moving the cylinder block 35 to the quill 17.
It is lowered to the insertion position into the cam hole 35f, and the lowering is stopped at this position. In this case, the push rod operating cylinder mechanism 52 is activated, and the plurality of push rods 48 are operated via the piston 52b, the swinging member 51, and the connecting member 50.
It is also possible to lower the cylinder block 35 and push down the upper surface of the cylinder block 35. Additionally, the notch operation cylinder mechanism 55 is operated to lower the notches 53, 53, and 53, and the notches 53, 53, and 53 are lowered to
, 24.25 are engaged with the recesses 27b, 27b, 28 provided in the bushings 27, 27°28, and the bushings 27, 27.
7.28 is prevented from rotating relative to the support member 23°24.25. Thereafter, the feeding cylinder mechanism 15 is operated to move the quill 17 backward together with the advancing/retracting member 14 and the coupling 16, and the cam hole 35 of the cylinder block 35 is
f and bushes 27, 27, and 28, and stop the quill 17 at a position where its tip does not interfere with the rear end of the cylinder block 35. Next, the lifting cylinder mechanism 4
4 to lower the elevating body 37, and actuate the push rod operation cylinder mechanism 52 to lower the push rod 48, thereby pushing the upper surface of the cylinder block 35 downward and knocking out the dowel hole 35 provided therein. (Pull out the dowel pin 47 and lower the cylinder block 35. By lowering the cylinder block 35, the positioning hole 35a of the cylinder block 35 is fitted into the positioning pin 36a of the transfer bar 36, and the cylinder block 35 is placed on the transfer bar 36.
After supporting the lower surface of 5, the positioning holes 35b, 3
The positioning pins 38a and 40a are pulled out from the cylinder block 5c, and the elevating body 37 is lowered to the lower end where the support metal 38.39°40 separates from the cylinder block 35, and then stopped. Then, the cylinder block 35 that has been processed is transported to the next process from below the canopy 19 by the transfer bar 36. The above-described operation is performed simultaneously for the left and right quills, and the polling of these quills 17 by the cutting tool 18 is performed simultaneously for all cam holes 35f of the cylinder block 35. In the embodiments described above, the quill was prevented from being pulled out from the bush provided on the power transmission member and the support member at the rear end. The quill may be able to be stopped at a predetermined position and removed from the power transmission member. Further, in the present invention, it is preferable that a plurality of nozzles protrude from appropriate positions on the lower surface of the canopy, and processing is performed while supplying coolant from these nozzles to the poling processing section using the cutting tool. In the above embodiment, the electric motor was provided on the bed, but in the present invention, the electric motor may be provided on the canopy, or it may be placed on the outer peripheral surface of the power transmission member as a built-in motor. Although the electric motor is disposed on the proximal end side of the quill, in the present invention, the electric motor may be provided on the distal end side of the quill together with the power transmission member. Further, in the above embodiment, the quill was pivoted at four locations including the middle portion thereof on a support member projecting downward from the canopy, but the present invention provides improvements in the base of the quill, such as omitting the pivot support of the middle portion of the quill. It is sufficient to simply pivotally support at least two locations such as the end portion and the tip portion using support members. As the coupling for connecting the proximal end of the quill to the reciprocating member used in this invention, it is preferable to use a floating type or Oldham type coupling. In the above-mentioned embodiments, a hole-machining machine for machining cam holes formed in the cylinder block of an engine has been described, but the present invention is not limited to the machining of cam holes or cylinder blocks; It can be widely applied to hole drilling machines that require a long quill as well as a cutting tool protruding from the hole, and depending on the workpiece, only one quill may be required.

【Effect of the invention】

As explained above, in the hole drilling machine of the present invention, the proximal end of the quill, on which the cutting tool protruding from the outer circumferential surface is attached, is connected to the reciprocating member provided in the feed device in a direction intersecting the axial direction via a coupling. A plurality of supporting members are connected to each other so as to be freely movable and rotatable, and project downward from a canopy disposed above the front side of the feeding device, and spaced apart from each other in the front-back direction, and the quill is rotated and rotated on these supporting members. A power transmission member is rotatably supported on the canopy and rotated by an electric motor, and the quill is engaged with the power transmission member so as to be movable in the axial direction, and the quill is rotated from the power transmission member. By transmitting force, the following effects can be obtained. That is, in the hole drilling machine of the present invention, the base end of the quill is movably connected to the reciprocating member of the feed device via a coupling in a direction intersecting the axial direction, and the rotation of the electric motor is held by the canopy. Since the power is transmitted to the quill by the power transmission member, it is possible to avoid installing an electric motor for rotating the quill in the reciprocating member, and the retracting member is less likely to vibrate during processing, and the retracting member and the quill are It is possible to block the vibration between. In addition, since the quill is supported at multiple points separated from each other in the axial direction of the quill, such as the two points near the proximal end and the tip end, by supporting members that protrude downward from the canopy, the length of the quill is supported. Even if the quill becomes long, it can be reliably pivoted at two or more places, and vibrations can be prevented from occurring in the quill. In addition, the power transmission member rotated by the electric motor can be held on the canopy, and the power transmission member Since the rotational force is transmitted to the quill from the rotating part! The amount of i can be reduced, the balance can be easily adjusted, and this also makes it difficult for the quill to vibrate. Therefore, according to the present invention, even when the quill is long, holes with high roundness can be formed. Furthermore, since a feed device without a main shaft is sufficient, it can be made into a simple configuration, so that a hole processing machine can be provided at a low cost.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing a hole drilling machine according to an embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view of a part of the left side of Fig. 1 for explaining the operation, and Fig. 3 is the left side of Fig. 2. FIG. 4 is an enlarged cross-sectional view of FIG. 1, FIG. 5 is an enlarged partial front view showing the relationship between the quill and the cam of the cylinder block, and FIG. FIG. 1 is a schematic perspective view showing a conventional hole drilling machine. DESCRIPTION OF SYMBOLS 11...-Bend, 12... Feeding device, 13... Support stand, Work 4... Moving member, 15... Feeding cylinder mechanism, 16... Coupling, 17-... Quill, 1
8... Cutting tool, 19... Canopy, 20... Support, 22
, 23, 24. 25... Support member, 26... Bearing,
27.28... Bush, 30... Electric motor, 32.
...Power transmission member, 35...Cylinder block (workpiece), 35e...Protrusion, 35f...Cam hole.

Claims (1)

[Claims] The proximal end of a quill, on which a cutting tool protruding from the outer peripheral surface is attached, is connected to a reciprocating member provided in the feeding device through a coupling so as to be movable and rotatable in a direction intersecting the axial direction. A plurality of support members are provided at mutual intervals in the front-rear direction and protrude downward from the canopy arranged at the upper front side,
The quill is pivotally supported by these support members so as to be rotatable and removable, a power transmission member rotated by an electric motor is rotatably held by the canopy, and the quill is engaged with the power transmission member so as to be movable in an axial direction. A hole drilling machine characterized in that the quill is configured to transmit rotational force from the power transmission member.