JP2609989B2 - Honing jig and automatic honing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF relates Beauty <br/> automatic honing system This invention Oyo honing tool, more particularly, swingably holding the workpiece by a simple and lightweight floating structure to a three-dimensional direction In addition, the present invention relates to a technology that enables quick and accurate automatic honing.

[0002]

2. Description of the Related Art Honing is one of the processing methods for finishing a radial surface of a workpiece (hereinafter referred to as a work), for example, an inner diameter surface of the work to a mirror surface. In the honing process, the honing tool and the work are placed in a relatively floating state, and the honing tool is rotated and reciprocated, and the honing tool is expanded with a wedge or cone to finish the inner surface of the work precisely. Do.

By the way, as a method of keeping the honing grindstone and the work relatively floating, only one of the honing grindstone side and the work side is generally floated, and the former has a large size. The latter is employed when machining a heavy work, and the latter is employed when machining a light work with small dimensions.

As a honing jig for holding a workpiece in a floating state, various types of honing jigs have conventionally been developed.
One example is shown in FIG. 13 (see Japanese Utility Model Publication No. 55-41465).

[0005] The honing jig is a transfer machine.
Installation type placed at the position corresponding to the honing machine of the device
On the transfer path of the transfer machine
An intermediate support b is supported on a fixedly disposed jig base a via bearings c and c so as to be swingable about the Y-Y axis, and a workpiece W is clamped on the intermediate support. The oscillating body d is XX through the X-cross pin e.
It is supported so as to be able to swing around the axis, whereby the swinging body d is swingable in a three-dimensional direction.

The swinging member d is provided with a pair of upper and lower clamp claws f and g for clamping the work W, and a driving means (not shown) using hydraulic pressure or the like for raising and lowering the lower clamp claw g. ing. h denotes a loading arm for adjusting the position of the work W, and i denotes a conveyor belt for conveying the work W.

[0007] The work W is provided on the conveyor belt.
i along the transport route, and
Stopped at the position of the honing jig arranged inside,
It is clamped and supported by this honing jig. In other words, this
The work W is placed on the lower clamp claw g, and when the positioning thereof is performed by the loading arm h, the lower clamp claw g is raised by the driving means, and the work W is connected to the upper clamp claw f. After that, the machining hole j of the workpiece W is subjected to honing from below by a honing tool k.

[0008]

However, such a structure has the following problems.

(1) Since the driving means of the lower clamp claw g uses a hydraulic pressure or the like as described above, a hydraulic cylinder as an actuator and a hydraulic piping thereof are required. Therefore, the honing jig itself and its peripheral devices tend to be large and complicated, and their weight tends to be excessively large as compared with the work W.

In particular, an increase in the weight of the oscillating body d causes a reduction in the followability of the work W to the honing tool k and, consequently, a reduction in machining accuracy. This tendency becomes more remarkable as the weight of the work W decreases. .

(2) Further, since hydraulic piping is required, a rotary joint or the like is required at a relatively movable part, so that the piping processing is difficult, and the driving means itself becomes complicated.

(3) The swing around the XX axis is due to the X-cross pin e support (sliding support), while the swing around the YY axis is the bearing c, c support (rolling support). The rotation resistance of the two supporting portions is larger in the former case. This causes a difference in the oscillating properties of the oscillating body d about the XX axis and the YY axis, and further, the followability of the work W clamped by the oscillating body d to the honing tool, which also lowers the processing accuracy. Will be invited.

(4) Further, such a structure cannot be used in a honing jig of a type for transferring a honing jig, that is, a transfer type honing machine. That is, as described above, this honing jig
Is conveyed along with the work W by the conveyor belt i.
Not the type, but on the conveyor route of this conveyor belt i
At a position corresponding to each honing machine.
It is of the installation type to be installed. Because of this,
The honing jig is a transfer-type honing machine
Could not be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a honing jig which is small in size and weight and has a simple structure, and which can be applied to a transfer type honing machine. An object of the present invention is to provide an automatic honing system capable of performing automatic honing processing with high accuracy.

[0015]

In order to achieve the above object, the honing jig of the present invention is designed to hold a workpiece.
In addition, the work is controlled by the work transfer section of the automatic honing system.
A jig base , which is conveyed integrally with the crop and is movably mounted on a conveying path of the work conveying section, and an oscillating body provided on the jig base so as to be swingable in three dimensions. And the workpiece is integrally provided on the
And a work holder for movably holding the work. Preferably, the swing body includes a first swing member and a second swing member.
A swing member, wherein the first swing member is suspended and swingably provided on the jig base via an X-cross pin, and the second swing member is provided with the X-cross pin. The work holder is provided so as to be suspended and swingable on the first swing member via a Y-cross pin orthogonal to the pin.
A work holding portion which is provided upright at the center of the second rocking member and which inserts and supports the inner diameter hole of the work from below, and a resiliently resiliently engages the work supported by the work holding portion. And a work fixing part to be engaged and stopped.

[0016] The automatic honing system of the present invention, which can be applied to the honing jig, provided in a loop, in any one of claims 1 to 5
A work transfer unit provided with a work transfer device for transferring the honing jig described above, a work loading / unloading device for loading / unloading a workpiece with respect to the honing jig transferred by the work transfer unit, and the work transfer At least one honing machine that is arranged at an intermediate position of the part and performs honing processing on the workpiece transported by the workpiece transport device,
Automatically controlling the at least one measuring device arranged at an intermediate position of the work transfer unit to measure a processing diameter of a workpiece and the work transfer device, the work loading / unloading device, the honing machine and the measuring device in conjunction with each other Preferably, the apparatus further comprises a work sorting device for sorting the processed work carried out by the work carry-in / out device.

[0017]

In the automatic honing system using the honing jig of the present invention, a predetermined honing process is automatically performed by the control device, for example, in the following order.

At the work transfer position of the work transfer section, the work transfer apparatus automatically sets the work on the honing jig of the work transfer section. Thereby, the work is held swingably in the three-dimensional direction by the floating structure of the honing jig.

The honing jig on which the work is set is
After being automatically conveyed to the honing position by the work conveying device, it is positioned and subjected to predetermined honing processing by a honing machine.

Subsequently, the workpiece is again automatically transported to the measurement position by the workpiece transport device, and then positioned, and the measuring device measures the workpiece processing diameter. This measurement result,
It is used to judge the quality of the work and is fed back to the control unit of the honing machine to control the next honing operation.

At the work unloading position of the work transfer section, the work unloading device takes out the processed work from the honing jig and supplies it to the work sorting device, where the work is sorted and discharged.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

[0023]

Embodiment 1 FIG. 1 shows an automatic honing system according to the present invention. This system includes a work transport section 1, a parts feeder 2, a work carrying robot (work carrying apparatus) 3, a pilot hole detecting apparatus (measuring apparatus). 4. Honing machines 5, 6 for roughing, honing machines 7, 8 for finishing, measuring device (measuring device) for finishing 9, work unloading robot (work unloading device) 10,
The work selection device 11 and the control device 12 are configured as main components. Hereinafter, each component device will be described in detail.

A. Work transfer unit 1: Work transfer unit 1
The honing jig 15 holding the work W is transported according to a series of honing steps.
, A work transfer device 17 for transferring the honing jig 15 along the transfer path 16.
And so on as main parts.

As shown in FIG. 1, the transport path 16 starts from a work loading position A,
Honing machines 5 and 6 for rough machining, honing machines 7 and 8 for finish machining, measuring device 9 for finish machining, and work unloading position B
After passing through, a rectangular loop is formed which returns to the work loading position A again.

As shown in FIG. 2, the transport path 16 is in the form of a guide rail provided with a guide groove 16a for guiding the honing jig 15, the detection position of the pilot hole detecting device 4, and each honing machine. The side walls 16b, 16b at the machining positions 5 to 8 and the measuring position of the measuring device 9 have:
As described later, a positioning device 18 for positioning the honing jig 15 is provided.

The workpiece transfer device 17, as the arrow (1), loading device 17a for conveying the honing jig 15 from the loading position A to the detection position of the inlet P _1, that prepared hole detecting device 4 of the honing portion, arrows as the marks (2), a transfer device 17b for conveying the honing jig 15 from the inlet P ₁ of the honing portion to the outlet P _2, as the arrow (3), carry-out device for transporting the outlet P ₂ until unloading position B 17
As shown by c and arrow (4), it is constituted by a return device 17d for transporting from the carry-out position B to the carry-in position A, and each of these devices 17a to 17d comprises a hydraulic cylinder.

The transfer device 17b includes a plurality of (six in the illustrated example) honing jigs 15, 15,..., The prepared hole detection device 4, the roughing honing machines 5, 6, the finishing honing machines 7, 8 is driven and controlled so as to sequentially tact continuously until finishing for measuring device 9 and the outlet P ₂ of the honing portion, other devices 17a, 17
Drives c and 17d are controlled so as to convey each honing jig 15 one by one. Each of the constituent devices 17a to 17d of the work transfer device 17 may be configured by an air cylinder instead of the hydraulic cylinder described above.

B. Parts feeder 2: Parts feeder 2
Supplies the work W to the receiving position C of the work loading robot 3. Specifically, the works W, W,... To be processed are sequentially and continuously transferred to the receiving position C while the posture thereof is being adjusted. Then, the work carrying robot 3 stands by.

C. Work loading robot 3, Work unloading robot
Bot 10: Both of the robots 3 and 10 have substantially the same structure, and include an apparatus body 20a and a work chuck 20b as shown in FIG.

The apparatus main body 20a is in the form of a swing arm whose base end is pivotally supported so as to be swingable, and is horizontally moved between a first position and a second position by a drive source (not shown). It is possible to swing to. That is, the work loading robot 3
Is disposed on the work loading side, and its swing arm 20a
Are reciprocally swingable between a receiving position (first position) C of the parts feeder 2 and a work carry-in position (second position) A of the work transfer section 1. On the other hand, the work unloading robot 10 is arranged on the work unloading side, and its swing arm 2
Oa is reciprocally swingable between a work unloading position (first position) B of the work transfer unit 1 and a receiving position (second position) D of the work sorting device 11.

The work chuck 20b is provided vertically downward at the tip of the swing arm 20a, and is rotatable about its vertical axis by a drive source (not shown) arranged in the swing arm 20a. , Can be moved up and down vertically. The work chuck 20b is
Specifically, in the form of a collet chuck that opens and closes by the action of an internal opening and closing member, the tip chuck portion can be inserted into the hole 201 to be processed of the work W when it is closed, and when it is expanded. Is configured to chuck the hole to be processed 201 from the inside.

The work chucks 20b of the two robots 3 and 10 move up and down and contract and expand at the first positions C and B and the second positions A and D, respectively.
The work W is transported in the horizontal direction while chucking and supporting the work W between these two positions, and the work W is rotated about the vertical axis in the honing jigs 15 at the work loading / unloading positions A and B. Let it.

B. Honing jig 15: The honing jig 15 holds the workpiece W,
The workpiece W is transported integrally with the workpiece W by the workpiece transport unit 1
As shown in FIGS. 2 to 5, the jig base 25, the oscillating body 26 and the work holder 27 are configured as main parts.

The jig base 25 has a substantially square shape as shown in FIG.
It is movably mounted on the top. Locking recesses (locking portions) 28a to 28d are provided at the center of each side of the jig base 25, and a pair of opposing locking recesses 28a, 28 are provided.
b or 28c, 28d resiliently engages with the positioning device 18 of the work transport unit 1 described above.

That is, as shown in FIG. 2, the positioning device 18 is in the form of a ball plunger comprising a locking ball 18a and a resilient spring 18b. At the processing positions of the boards 5 to 8 and the measuring position of the measuring device 9, a pair of left and right sides are provided on both side walls 16 b, 16 b of the guide rail 16 of the work transfer unit 1 so as to face each other. Then, the locking balls 18a, 18a of these positioning devices 18, 18 are fitted to the locking recesses 28a, 28b or 28 of the jig base 25.
The honing jig 15 is positioned by being resiliently locked to c and 28d.

The oscillating body 26 is provided on the jig base 25 so as to be able to oscillate in a three-dimensional direction, and includes a first oscillating member 30 and a second oscillating member 31.

The first oscillating member 30 is provided on support columns 32, 32 of the jig base 25 via X-cross pins 33, 33 so as to be suspended and swingable. Outside the member 30, a second swing member 31 is provided in a suspended manner and swingable via Y-cross pins 34, 34 orthogonal to the X-cross pin 33. As a result, the second swing member 31 moves the Y-cross pins 34, 3 to the movement of the X-cross pins 33, 33 (rotation about the XX axis).
4 (rotation about the Y-Y axis) is added to enable swinging in the three-dimensional direction.

As shown in FIG. 4, the X-cross pin 33 has a proximal end fixed to the support column 32 and a distal end whose radial end permits movement in the axial direction. The first swing member 30 is supported by the first swinging member 30 via the shaft 35. On the other hand, the Y-cross pin 34
As shown in FIG. 5, the base end of the second swing member 31
And a distal end of the first bearing is fixed via a radial bearing 36 that allows the tip to move in the axial direction.
Each of the swing members 30 is pivotally supported.

As a result, in addition to the above-described swing in the three-dimensional direction, the second swing member 31
3 and Y-cross pin 34 in the axial direction, that is, XX
Horizontal movement is also possible in each of the axial direction and the YY axis direction. In addition, such radial bearings 35, 36
The use of makes the movement of the second swinging member 31 and the work holder 27 attached thereto lighter,
Oscillation (rotational resistance) around the XX axis and around the YY axis becomes substantially uniform. As a result, as described later, good and uniform followability to the honing tool 60 is ensured, and a difference in processing accuracy is prevented, and high-accuracy honing can be ensured.

As the radial bearings 35 and 36, bushes (including oil-impregnated bearings or Teflon-coated bushes) are used in the illustrated example.
A bearing structure such as a ball bearing that ensures smooth movement may be employed. 2 and 3, 37
Indicates an adjusting screw for adjusting the amount of swing of the first swing member 30.

Although not shown, an adjustment screw for adjusting the swing amount of the second swing member 31 is also provided.
Further, an adjusting screw for adjusting the horizontal movement amount of the first and second swing members 30 and 31 is provided.

The work holder 27 can remove the work W.
It is capable of positioning and holding the work W , and is integrally fixed to the second swing member 31 of the swing body 26. As shown in FIGS. 4 and 5, the work holder 27 includes a work holding unit 40 that supports the work W from below, and a work fixing unit 41 that locks and fixes the work W.

The work holding part 40 is provided with the lower hole 2 of the work W.
02 and a mounting flange 40b.
And the supporting rod 40a is connected to the second swinging member 3
The mounting hole 40a is inserted from below into the center hole 31a, and the mounting flange 40b is fastened and fixed to the second swing member 31 with the mounting bolt 42.

The support rod 40a, which is integrally arranged in an upright manner with the second swinging member 31, has a hollow cylindrical hollow structure, and can rotate the lower hole 202 of the work W from below. Insert and support. The upper end 4 of the support rod 40a
Reference numeral 0c is a positioning step that locks and holds the step of the lower hole 202 of the work W.

The work holding part 41 is provided with the work holding part 4.
The work W supported by the work holding unit 40 is resiliently and resiliently engaged with the work W. , 46.

As shown in FIGS. 4 and 6, the fixing portion main body 45 is disposed on both sides of the work holding portion 40 so as to face each other. The lower surface 45a of the fixing portion main body 45 is formed as a flat surface, and the flange 2 of the work W positioned and supported on the support rod 40a of the work holding portion 40.
The height of the support rod 4 is set slightly higher than that of the upper surface 203 a of the support rod 4.
It cooperates with the positioning step 40c of Oa to function as a positioning surface for positioning the work W in the height direction.

The ball plunger 46 is provided downward on the fixed portion main body 45, and includes a locking ball 46a,
The spring 46b is configured to resiliently urge the spring 46b downward. The positions of the pair of ball plungers 46, 46 are arranged so as to be able to rush into the flange holes 203b, 203b of the work W, respectively. In this connection, a positioning stopper 47 (see FIG. 6) is provided adjacent to the ball plunger 46 on the lower surface 45a of the fixing portion main body 45.
Are configured to abut and support the side edges of the workpiece W to position the workpiece W in the rotational direction.

The mounting of the work W on the second swing member 31 is automatically performed by the work loading robot 3 in the following order.

As shown by the two-dot chain line in FIG. 6, with the flange 203 of the work W positioned, the lower hole 202 of the work W is inserted into and supported by the support rod 40 a of the work holding unit 40 from above. In this state, the lower hole 20 of the workpiece W is
The lower end of the workpiece 2 is locked and held by the positioning step 40c, and the workpiece W is positioned in the height direction.

When the work W is held in this state,
0a, and as shown by a solid line in FIG.
7 and 47, the workpiece W is positioned in the rotational direction, and at the same time, the ball plunger 4 is inserted into the flange holes 203b and 203b of the workpiece W.
The locking balls 46a, 46a are resiliently locked, and this state is maintained.

On the other hand, the work W is automatically removed from the second swinging member 31 by the work unloading robot 10 in the completely reverse order.

E. Honing machine 5-8: Honing machine 5
8 is a vertical type as shown in FIG. 8, and includes a rotating spindle 61 having a honing tool 60 at its tip, a spindle rotating drive section (spindle rotating means) 62, and a spindle reciprocating drive section (spindle reciprocating means). ) 63, a grindstone driving unit (grinding wheel driving unit) 64, a control unit (control unit) 65, and the like. Reference numeral 66 denotes a power supply.

The honing tool (so-called honing mandrel or honing head) 60 is provided with a rotating spindle 6.
A plurality of honing grindstones 70, 70,..., Which are exchangeably mounted at the tip end, that is, the lower end thereof, and which are radially expandable / contractible,
00 (see FIG. 10) and the honing stones 70, 70,
, Etc., are returned.
The honing grindstones 70, 70,... Are expanded with the downward movement of the cone rod 100.
With the upward movement of the cone rod 100, the retracting operation is performed by the return spring.

The rotary main shaft 61 has a honing tool 60 at its lower end, a drive shaft 71 and a drive motor 7.
2 and the like, and the main body rotation drive section 62 and the slide body 7
3, the main shaft reciprocating drive unit 63 including the hydraulic cylinder 74, etc.
And each is linked.

That is, the rotary spindle 61 is connected to the slide body 7
3 and rotatably supported by the slide body 73.
Is provided on a vertically extending guide rod 76 on the body 75 so as to be able to move up and down, and is connected to a piston rod 74 a of a hydraulic cylinder 74 attached to the body 75. When the piston rod 74a of the hydraulic cylinder 74 moves up and down, the slide body 7
3, the rotary spindle 61, ie, the honing tool 6
0 will be moved up and down.

The upper end of the rotating main shaft 61 is
Keyed or spline-fitted to a drive shaft 71 rotatably provided on the head portion 75a of the drive shaft 71a.
Are connected to each other so as to be relatively movable in the vertical direction (axial direction) and to be integrally rotatable.

A transmission pulley 77a is provided at the upper end of the drive shaft 71.
The transmission pulley 77a is connected via a transmission belt 78 to a transmission pulley 77b attached to the motor shaft of the drive motor 72. Then, by the rotational driving of the driving motor 72, the rotating main shaft 61, that is, the honing tool 60 is rotationally driven via the driving shaft 71.

The grindstone driving unit 64 is provided with the honing grindstone 7.
, A cutting rod 79 (FIG. 10) of the honing tool 60, and a cutting drive mechanism 79 for moving the cone rod 100 up and down.
And a servo motor 80 as a driving source.

The cutting drive mechanism 79 has a conventionally well-known structure.
Rotation transmission mechanism 8 provided on head portion 75a of body 75
1 is connected to the motor shaft of the servomotor 80. The cutting drive mechanism 79 is driven by the rotation of the servo motor 80 in the forward direction, and the cone rod 100 in the honing tool 60 is driven.
Move downward, and the honing stones 70 are extended. On the other hand, the cone rod 100 is moved upward by the rotational drive of the servo motor 80 in the reverse direction,
The honing stones 70, 70,...
The retracting operation (returning operation) is performed by the return spring inside.

As the servomotor 80 for controlling the amount of expansion and contraction of the honing grindstones 70, 70,..., Specifically, a stepping motor is used, and the amount of rotation is determined by a position detector 82 such as a rotary encoder. Is detected.

The control unit 65 includes the honing machines 5, 6, 7,
8 automatically controls the operation of each drive unit in conjunction with each other, and specifically includes a CPU, a ROM, a RAM, and an I / O
It is composed of a microcomputer consisting of ports and the like. .

The control unit 65 incorporates a machining program and the like for executing honing machining.
As shown in FIG. 9, the main control unit 65a, the main shaft rotation driving unit 6
2, a spindle rotation control unit 65b, a spindle reciprocating drive unit 6,
The reciprocating control unit 65c controls the spindle 3 and the grindstone control unit 65d controls the grindstone drive unit 64. .

The main control section 65a includes the driving sections 62, 6
Various information necessary for driving the 3, 64, such as the rotation speed, the elevating speed, the cutting speed, and the operation timing of the honing tool 60 (arbitrary function waveform signal such as a sin function), or the honing grindstones 70, 70,. The reference positions (stroke positions) A and B (see FIG. 10) and the stroke width S (see FIG. 10) are set as NC (numerical control) data in advance or as appropriate by a keyboard or the like. Each of the control units 6 according to the data
5b to 65d are controlled. .

The control units 65b to 65d include:
Drive motor 72, hydraulic control valve 74 of hydraulic cylinder 74
b, in addition to the servomotor 80 and the position detector 82, a position detector 84 for detecting the position of the slide body 73 from a scale 83 provided on the slide body 73, and other driving units are electrically connected. The actual value information obtained therefrom is compared with the various set values set in advance by the main control unit 65a, and the operation of each of the drive units 62 to 64 is drive-controlled based on the calculation result. .

The honing machines 5 to 8 constructed as described above are arranged at some point in the work transfer section 1 and their driving sections 62, 63, 64 are controlled by the control section 65 as described below. The honing process is performed on the work W conveyed by the work conveyance device 17 and is automatically controlled in relation to each other. In this case, in the first and second roughing honing machines 5, 6 and the first finishing honing machine 7, the fixed-size machining, that is, over the entire honing area (that is, the stroke width S in FIG. 10) is performed. Uniform honing with a predetermined cutting amount is performed. On the other hand, the second finishing honing machine 8 performs automatic control processing, that is, honing based on a measurement result of a finishing processing measuring device 9 described later. .

First, the main shaft reciprocating drive unit 63 causes the honing grindstones 70, 70,...
0), and the spindle rotation drive unit 6
2 gives the honing tool 60 a rotational movement. .

Subsequently, while the rotary motion and the reciprocating motion (elevation stroke S) are given to the honing tool 60 by the spindle rotation drive unit 62 and the spindle reciprocation drive unit 63, the honing wheels 70 and 7 are driven by the grindstone drive unit 64.
A certain cut (expansion) is given to 0,..., And the entire processing area of the hole 201 to be processed is subjected to honing. .

When the honing with the set cutting depth is completed, the honing wheels 70, 70,...
Rises again and returns to the initial position. .

In the above-described process, first, while the honing tool 60 is given a rotational movement by the main spindle rotation driving unit 62, the honing grindstones 70, 70,. The lowest processing position B of the W with respect to the hole Wa to be processed (FIG. 10)
The position may be lowered to the position indicated by the two-dot chain line). .

F. Pre-hole detecting device 4, measuring device for finishing
Installation 9: These two devices 4 and 9 are the holes 201 to be machined of the workpiece W.
In the former 4, the inner diameter before processing (prepared inner diameter) is measured, and in the latter 9, the inner diameter after processing (finished inner diameter) is measured. Specifically, an air micrometer is provided. The measurement head 90 of the air micrometer is integrally attached to the tip (lower end) of a main shaft 91 as shown in FIG. It is possible to reciprocate in the direction.

The measuring head 90 has a cylindrical shape having an outer diameter smaller than the inner diameter of the hole 201 to be processed of the work W, and has air nozzles 90a, 90a for injecting measuring air on its outer peripheral surface. It is provided radially outward.

Then, in a state where the measuring head 90 is inserted into the hole 201 to be processed of the work W, air for measurement is jetted from the air nozzles 90a, 90a, and
The inner diameter of the hole 201 to be processed is measured from the pressure change of the measuring air due to the gap between the inner surface of the measurement head 01 and the outer surface of the measuring head 90.

In the case of the illustrated example, the inner diameter measured by the air micrometer is, as shown in FIG. 11, at four positions (d ₁ to d ₁₎ in the hole 201 to be machined in the axial direction.
d ₄ ), and these four measured values d _{1 to} d ₄ are sent to an arithmetic control unit of an air micrometer (not shown),
The inner diameter shape mode of the hole 201 to be machined of the work W is compared and calculated.

Then, in the pilot hole detecting device 4, it is further determined from the above calculation result whether or not the pilot hole inner diameter of the workpiece hole 201 of the work W is within the honing possible range.
If it is within the range, the control unit 65 of each of the honing machines 5 to 8
A command signal for executing honing is sent to the controller. On the other hand, if the signal is out of the range, a command signal indicating that no honing is required is sent to each control unit 65 of each of the honing boards 5 to 8, and each of the honing boards 5 to 8 is stopped sequentially. NG to work sorting device 11
A signal is sent.

In the measuring device 9 for finishing processing,
The above calculation result is fed back to the control unit 65 of the second finishing honing machine 8, and the finishing honing is performed based on the result. For example, if the measured inner diameter shape mode has a high cylindricity (a cylindrical surface having a uniform inner diameter surface shape of the hole 201 to be processed), uniform honing over the entire honing region (that is, the stroke width S) is performed. On the other hand, if there is a non-uniform portion on the inner diameter surface of the hole 201 to be machined, first, honing of a short stroke width is performed locally only on the non-uniform portion, and then uniform honing over the entire honing region is performed.

Further, the calculation result of the finishing processing measuring device 9 is also sent to the work sorting device 11 as a processing result of the work W (OK signal for a non-defective product, NG signal for a defective product).

It is to be noted that the measuring head 90 of the measuring device 9 for finishing processing is driven so as to rotate in addition to reciprocating movement in the vertical direction, and the roundness of the hole 201 to be processed is also measured. Good.

G. Work sorting device 11: The work sorting device 11 sorts the work W carried out by the work unloading robot 10, and detects a detection signal (a prepared hole NG signal) from the prepared hole detecting device 4 and a measuring device 9 for finishing. Measurement signal (OK signal if good, (+) if defective)
NG signal or (-) NG signal), and performs a predetermined sorting operation.

More specifically, the work sorting device 11
And two discharge chutes 11a, 11b, 11c
(Not shown)
Is provided. The guide mechanism receives the work W from the work unloading robot 10 at the receiving position D and, when receiving the prepared hole NG signal or the (+) NG signal, discharges the work W to the first discharge chute 11a.
(−) When the NG signal is received, the work W is discharged to the second discharge chute 11b, and when the OK signal is received, the work W is discharged to the third discharge chute 11c.

Although not shown, the OK signal from the finishing processing measuring device 9 is further subdivided, and the third discharge chute 11c is divided into a plurality of pieces corresponding to the type of the OK signal. In the case where is a non-defective product, a grade (rank) may be added to the dimensional accuracy, and the workpiece W may be selectively discharged for each grade.

H. Control device 12: The control device 12 automatically controls the work transfer section 1 and the above-described devices 2 to 11 arranged in the middle of the transfer path in conjunction with each other, and specifically includes a CPU, a ROM, and a RAM. And a microcomputer including an I / O port and the like. .

The control device 12 controls the honing jig 10
A series of process programs from the point at which the workpiece is loaded and placed at the workpiece loading position A of the workpiece transport unit 1 to the point at which the workpiece is returned to the workpiece loading location A after a predetermined honing process and the like are incorporated. The operation timing and the like of each of the devices 1 to 11 are selectively input and set as NC data in advance or by a keyboard as appropriate, and the respective devices 1 to 11 are sequence-controlled according to these data. .

Next, the honing process using the automatic honing system configured as described above will be described. .

I. Loading of work W : Work W, W, ...
Are transported to the receiving position C sequentially and sequentially by the parts feeder 2 while adjusting the posture thereof, and then chucked one by one by the workpiece loading robot 3 to load the workpiece into the workpiece transport unit 1 in the manner described above. It is attached to the work holder 27 of the honing jig 15 waiting at the position A. As a result, the work W is placed in the honing jig 1
5 is held so as to be swingable in a three-dimensional direction. .

II. Automatic Honing of Work W: i) When the process of attaching the work W to the honing jig 15 at the work loading position A is completed, the loading device 17a is operated,
The honing jig 15 (hereinafter workpiece W), and conveyed to the detection position of the inlet P _1, that prepared hole detecting device 4 of the honing portion, after the positioning by the positioning device 18 has been made, the lower hole detecting device 4 Workpiece hole 201 of work W
Is detected in the manner described above, and the detection result is sent to the control unit 65 of each of the honing machines 5 to 8. .

Ii) In this case, if the internal diameter of the prepared hole of the machined hole 201 is within the range of possible honing, each of the honing machines 5-8
Is performed in the following manner. .

That is, the work W located at the entrance P ₁
, The first roughing honing machine 5 → the second rough working honing machine 6 → the first finishing honing machine 7 → the second finishing honing machine 8 → the finishing machine While being tact-fed to the measuring device 9, the positioning device 18 is positioned at the position of each device, and predetermined processes are sequentially executed. .

That is, rough honing processing is sequentially performed on the work W by the honing machines 5 and 6 for rough processing.
Subsequently, after precise finishing honing is performed by the honing machines 7 and 8 for finishing, the measuring device 9 for finishing measures the final finishing state of the hole 201 of the work W, and the measurement result is The feedback to the second finishing honing machine 8 and the work sorting device 11
Send to .

Iii) On the other hand, if it is out of the range, the honing is not performed, and at the same time, the pilot hole NG signal is also sent to the work sorting device 11. .

II. Unloading of the workpiece W: workpiece W conveyed without passing through the through with or honing a series of honing to the outlet P _2, after being transported to the work unloading position B by unloading device 17c, the chucking by work unloading robot 10 Then, the workpiece is removed from the work holder 27 of the honing jig 15 and carried out to the receiving position D of the work sorting device 11 in the manner described above. .

On the other hand, the honing jig 15 from which the work W has been removed is conveyed to the work carry-in position A by the return device 17d, and waits for the work carry-in robot 3 to mount the next work W. .

III. Selection and discharge of the work W: The work selection device 11 processes the work W carried out to the receiving position D, that is, a detection signal (a prepared hole NG signal) from the prepared hole detection device 4 or a measurement for finish processing. A measurement signal (OK signal for a non-defective product, (+) NG signal or (-) NG signal for a defective product) has been received in advance from the device 9, and according to this information, the work W is processed in the manner described above. And selectively discharge to any one of the discharge chutes 11a, 11b, 11c. .

In the automatic honing system configured as described above, the work from the loading of the work W to the unloading after the completion of the honing is automatically performed, thereby saving labor in the honing. .

Further, at the time of honing by each of the honing boards 5 to 8, the work W is held by the honing jig 15 so as to be swingable in three-dimensional directions and is in a floating state. Of the honing tool 60 is maintained satisfactorily, and high machining accuracy is secured. That is, even if the centering and the parallel state between the outer diameter of the work W and the hole 201 to be machined are not ensured accurately, the swing body 26, particularly the second swing member 3, is not provided.
By the movement in the three-dimensional direction, these deviations are absorbed and precise honing is realized. .

Note that the above-described embodiment merely shows a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made. .

For example, in the illustrated example, the work W is
At the work carry-in position A, it is attached to the honing jig 15, and at the work carry-out position B, the honing jig 15 is attached.
, And only the honing jig 15 is returned to the work carry-in position A. However, the work W is returned to the work carry-in position A together with the honing jig 15, and the work W is transferred to the work carry-in robot 3. , And a simpler system configuration is also possible. .

In the illustrated example, the measuring devices 4 and 9 are used.
Are arranged at a station independent of the honing machine. For example, the measuring device 9 for finishing is arranged integrally with the honing machine 8 for finishing (including the case where the honing machine is at the same station), and is in-process. The measurement may be performed. .

The specific structure of each device constituting the honing system can be changed without being limited to the illustrated example. .

For example, in place of the measurement head 90 of the air micrometer of the pilot hole detection device 4 shown in FIG.
A plug gauge 190 as shown in FIG. The plug gauge 190 has a small diameter side passage portion 190a and a large diameter side stop portion 190b provided coaxially and continuously, and can reciprocate in the axial direction of the work hole 201 of the work W, that is, in the vertical direction. It has been. .

If the passing portion 190a does not enter the hole 201, it is determined that the hole diameter is small, and the honing is not performed. If the passing portion 190a enters the hole 201, the hole diameter is determined to be appropriate. Then, honing is performed, and if the stop portion 90b enters the hole 201 to be processed, it is determined that the hole diameter is large, and the honing is not performed. .

Further, regarding the structure of the work loading robot 3 and the work unloading robot 10, the work chuck 20
a double arm structure having two functions of carrying in and carrying out, and an XY type in which the work chuck 20b moves linearly in two directions;
Alternatively, various structures having the same operation and function as the illustrated example, such as a scalar type, can be adopted. .

[0104]

As described in detail above, the honing jig according to the present invention comprises a jig base movably mounted on a transfer path of a work transfer section of an automatic honing system, and a three-dimensional base mounted on the jig base. A swinging body provided to be swingable in a direction,
Workpiece can be removed integrally provided on this rocking body
And a power holder such as a hydraulic cylinder as in the prior art, and no drive source, so that the size and weight of the honing jig can be significantly reduced and the structure thereof can be simplified.

Therefore, even if the work is relatively light and small in size, the weight of the honing jig itself does not become excessively large as compared with the work, and the work follows the honing tool with good and high performance. Processing accuracy can be ensured. .

Further, since the work loading / unloading device automatically mounts / removes the work and has a very simple structure with no extra or unnecessary accessories, the unit cost of the honing itself is reduced. This is particularly advantageous for a transfer-type honing machine that automatically conveys a plurality of honing jigs. .

Further, according to the automatic honing system of the present invention, the control device automatically controls the work transfer device, the work loading / unloading device, the honing machine and the measuring device in conjunction with each other. From the loading of the work to the unloading after the completion of the honing process is automatically performed, the subsequent sorting operation can be automated, and the honing process can be labor-saving, and the above-described honing jig of the present invention is adopted. By doing so, simplification and high accuracy of the entire system are also realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of an automatic honing system according to an embodiment of the present invention.

FIG. 2 is a plan view showing a honing jig used in the automatic honing system.

FIG. 3 is a front view showing the honing jig.

FIG. 4 is a longitudinal sectional view showing the honing jig along a line IV-IV in FIG. 2;

FIG. 5 is a longitudinal sectional view showing the honing jig along a line VV in FIG. 2;

FIG. 6 is a plan sectional view showing a work holder part of the honing jig along a line VI-VI in FIGS. 3 and 4;

FIG. 7 is a vertical cross-sectional view showing a main part of a work loading / unloading robot of the automatic honing system and explaining how to attach and remove the work of the honing jig.

FIG. 8 is a schematic configuration diagram showing a honing machine of the automatic honing system in a partial cross section.

FIG. 9 is a block diagram showing a configuration of a control unit of the honing machine.

FIG. 10 is a longitudinal sectional view for explaining an operation of a honing tool of the honing machine.

FIG. 11 is a longitudinal sectional view showing a main part of a measuring device of the automatic honing system.

FIG. 12 is a longitudinal sectional view showing a main part of a modified example of the pilot hole detection device which is one of the measurement devices.

FIG. 13 is a view showing a conventional honing jig;
FIG. 13A is a plan view showing a part in section, and FIG. 13B is a longitudinal sectional view.

[Explanation of symbols]

A Work carry-in position B Work carry-out position W Work 1 Work transfer unit 2 Parts feeder 3 Work carry-in robot (Work carry-in device) 4 Pre-hole detection device (Measurement device) 5,6 Roughing honing machine 7,8 Finishing honing Panel 9 Measuring device for finish processing (measuring device) 10 Work unloading robot (Work unloading device) 11 Work sorting device 12 Control device 15 Honing jig 16 Transport path 17 Work transport device 18 Positioning device 25 Jig base 26 Oscillator 27 Work Holder 30 First swing member 31 Second swing member 32 Support column 33 X-cross pin 34 Y-cross pin 40 Work holding part 40a Support rod 40c Positioning step part 41 Work fixing part 45 Fixed part body 46 Ball plunger 60 Honing tool 61 Rotating spindle 62 Spindle rotation drive (primary Shaft rotating means) 63 spindle reciprocating drive unit (spindle reciprocating means) 64 grinding wheel driving unit (grinding wheel driving means) 65 control unit (control means) 201 workpiece hole 201 work lower hole 203 work flange 203b work flange hole

Claims (15)

(57) [Claims] 1. An automatic horn for holding a workpiece.
The workpiece is transported integrally with the workpiece by the workpiece transport section of the
Be one that is, this and the jig base movably mounted on the transport path of the workpiece transfer unit, and the swinging body is provided swingably to the fixture base to the three-dimensional direction, the rocking body Workpiece can be removed from the top
A honing jig, comprising: a work holder that holds the workpiece. 2. The oscillating body comprises a first oscillating member and a second oscillating member, and the first oscillating member is suspended and oscillated on the jig base via an X-cross pin. Movably provided, and the second swinging member is Y that is orthogonal to the X-cross pin.
A work pin is provided on the first swinging member via a cross pin so as to be suspended and swingable, and the work holder is provided upright at the center of the second swinging member, The honing jig according to claim 1, further comprising: a work holding portion that inserts and supports the hole from below, and a work fixing portion that releasably locks a workpiece supported by the work holding portion. 3. The work holding portion includes a support rod rotatably supporting an inner diameter hole of a workpiece, and a positioning step provided on the support rod for positioning the workpiece in a height direction. The work fixing portion is arranged at an outer peripheral position of the work holding portion, and is configured to resiliently lock from above into a hole portion of a workpiece positioned and supported on a support rod of the work holding portion. The honing jig according to claim 2. 4. The work fixing part is in the form of a downward ball plunger arranged at an outer peripheral position of the work holding part, and the work positioned and supported on the support rod of the work holding part is supported around the support rod. The honing jig according to claim 3, wherein the honing jig is configured to be elastically locked from above in the hole of the workpiece by being rotated. 5. The honing jig according to claim 1, wherein the jig base is provided with a locking portion that resiliently locks with the positioning device for the work transfer unit. 6. A method according to claim 1 , wherein said step is provided in the form of a loop.
A work transfer unit provided with a work transfer device that transfers the honing jig according to any one of the above, and a work transfer unit that transfers a work to the honing jig transferred by the work transfer unit. A work loading / unloading device to be carried out, and at least one honing machine that is disposed at an intermediate position of the work transfer unit and performs honing processing on a workpiece transferred by the work transfer device, and at an intermediate position of the work transfer unit. At least one measuring device arranged to measure a processing diameter of a workpiece, and a control device for automatically controlling the work transfer device, the work loading / unloading device, the honing machine and the measuring device in conjunction with each other are provided. An automatic honing system, characterized in that: 7. The automatic honing system according to claim 6, wherein the measuring device is arranged independently of the honing machine. 8. The automatic honing system according to claim 6, wherein the measuring device is disposed integrally with the honing machine. 9. The honing device according to claim 1, wherein
A conveyance path for placing and guiding the tool, a work conveyance device for tact-feeding the honing jig placed on the conveyance path to the honing machine and the measuring device, and a honing jig tact-fed by the work conveyance device. 7. The automatic honing system according to claim 6, further comprising a positioning device for positioning the honing machine at a processing position and a measuring position of a measuring device. 10. The apparatus according to claim 1, wherein the work carrying-in / out device is provided between the carrying-in / out position of the work carrying unit and a work supply unit or a carrying-out unit. 7. The automatic honing system according to claim 6, further comprising: a work chuck for chucking and supporting a hole of an object. 11. The honing machine is capable of reciprocating in the axial direction of a workpiece diametric surface of a workpiece, and is rotatably supported about an axis. A spindle rotating means for rotating and driving, a spindle reciprocating means for reciprocating the rotating spindle in the axial direction of the processing diameter surface, and a honing grindstone attached to the tip of the rotation spindle and having a grinding wheel surface along the processing diameter surface. A honing tool provided to be able to expand and contract, a grindstone driving means for giving a predetermined cutting operation to a honing grindstone of the honing tool, and control for automatically controlling the operations of the spindle rotating means, the spindle reciprocating means and the grindstone driving means in conjunction with each other. 7. The automatic honing system of claim 6, comprising means. 12. The automatic honing system according to claim 6, wherein the measuring device has an air micrometer attached to a tip end of a shaft which is reciprocally movable in an axial direction of a radial surface of the workpiece. 13. The measuring device according to claim 1, wherein an air micrometer is attached to a tip of a shaft which is reciprocally movable in an axial direction of a radial surface to be processed of the workpiece and which is rotatable around the axis. Item 7. The automatic honing system according to Item 6. 14. The measuring device according to claim 1, wherein a plug gauge is attached to a tip of a shaft which is reciprocally movable in an axial direction of a diameter surface of the workpiece to be machined. The automatic honing system according to claim 6, wherein the portion is provided coaxially and continuously from the distal end side. 15. The automatic honing system according to claim 6, further comprising a work sorting device for sorting the processed work carried out by the work carry-in / out device.