JPS63196360A - Automatic grinding wheel wear correcting mechanism in deburring operation of casting or forging by grinding wheel - Google Patents

Abstract

PURPOSE:To completely remove remaining burr by placing one detecting bar so as to be brought into contact with the a cast or forged surface in the vicinity of a burr and the other detecting bar which is related to said detecting bar so as to be brought into contact with a ground face, and detecting the height of said remaining burr integrally with a grinding unit, and advancing said grinding unit by the detected remaining quantity. CONSTITUTION:By setting a detecting bar K with its end being projected by A out of the front face G' of a grinding wheel G, the whole frame F is advanced while counting a pulse quantity corresponding to a defined advancing quantity A, and stopped when the counting is completed. This position is the face on which a burr B is produced and grinding is carried out by retracting only the detecting bar K. Since there is a slight difference in height which is necessary for correcting the wear of a grinding wheel between the ends of the detecting bar L and annular detecting bar C of an automatic grinding-wheel wear correcting device H, when the grinding wheel G is worn causing the height alpha of the remaining burr B'' to exceed an allowable range, one of the bars is brought into contact with a cast face B' while the other is brought into contact with the burr B''. And, the grinding wheel alone is moved by the amount of the gap a of the difference between the ends by means of an electric signal, completing the correction. Accordingly, the remaining burr which is produced due to the wear of the grinding wheel G can be completely removed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention uses a grinding wheel to deburr large quantities of workpieces whose finished dimensions vary due to differences in casting mold dimensions, degree of wear, etc. The purpose of the present invention is to provide the industry with a grinding device equipped with a correction mechanism for completely removing residual particles caused by wear of the grinder.

(Prior art) Conventionally, in the deburring work of cast and forged products, due to the variation in the dimensions of the workpiece and the amount of wear on the grinding wheel, the remaining deburring inevitably remained and was carried out visually, manually, or by push-button operation. , which was extremely inefficient and inaccurate.

In addition, some automatic detection devices used air sensors to directly measure the surface of a worn whetstone, but the surface of the whetstone was indeterminate and was not accurate.

(Problems to be Solved by the Invention) In view of the above-mentioned drawbacks, the present invention has been designed to solve the problem that even if the deburr is removed by an appropriate method, the amount of wear of the grinding wheel that wears out during grinding is unknown, so residual deburr inevitably remains. In order to further remove this, it is necessary to manually or repeatedly press a button by visual inspection, or if the grinding wheel surface is directly detected by an air sensor during automatic grinding, the accurate amount of wear is unknown because the grinding wheel surface is unstable. Therefore, complete correction grinding was difficult.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides two sensing rods associated with each other, and uses one sensing rod to detect the casting surface or forging surface near the burr. The other detection rod is placed so that it is in contact with the grinding surface trace (remaining burr surface), and the detection device is integrated with the grinding device to detect the height of the remaining burr, and the grinding unit is moved only by the detected remaining amount. and a mechanism for giving a command to the grinding unit moving device to move the grinding unit forward.

(Action of invention) The effects of the present invention will be listed below.

■Set the detection rod K of the grinding front detection device S with the tip of the detection rod protruding from the front surface G° of the grindstone G by an amount A. (See FIG. 8(A)) ② Advance the entire frame F, on which the detection rod K is attached, toward the fixed workpiece W.

(2) The robot moves forward while counting pulses corresponding to the constant advance amount A, and when the count is completed, the forward movement stops.

■This position becomes the surface where burr B occurs, and only this detection rod retreats to a position where it does not interfere with grinding.

■Grinding.

■There is a slight difference between the tips of the detection bar of the automatic grindstone wear compensation device H and the annular detection bar C, which is necessary for the grindstone wear compensation, so the grindstone G gradually wears out and the height of the remaining burr B It When α exceeds the allowable range, the tips of the two detection rods and C will eventually come into contact with the casting surface B, one with the remaining burr Btt, and simultaneously emit an electric signal. emanate. (See Figure 8 (B)) ■When both of these electric signals are received simultaneously, the combination of the screw mechanism and the motor moves the grinding wheel G by the gap α of the difference between the tips of both detection bars and C. It rotates, and only the grindstone G is moved by the screw, completing the correction.

(Structure of the invention) The configuration of the present invention will be explained based on the drawings of the embodiments.

As shown in FIGS. 1 and 2, the grinding device 1 includes a base 2
On a pedestal 5 on which the guide bar 3.3 provided above can be reciprocated by a cylinder 4, another guide bar 6.6 is provided perpendicular to the guide bar 3.3.
A grinding machine has a frame 7 which can be slid freely on the pedestal 5 and can move back and forth by a distance controlled by a pulse motor 8 mounted on the pedestal 5, and a grinding wheel 10 which is driven by a drive motor 9 is provided on the frame 7. A grinding front detection device 13 having a detection rod 12 for detecting the grinding front surface is mounted on the frame 7, and a grinding wheel automatic wear having a detection rod 14 for automatic grinding wheel wear correction is mounted on the frame 7. A correction device (hereinafter abbreviated as correction device) 15 is attached integrally to the pedestal 5.

To explain the correction device 15 in detail, as shown in FIGS. 3 to 7, the front surface 10 of the grindstone 10 on the stand 5 of the grinding device 1 is
An air cylinder 16 is mounted horizontally using a mounting material 17 in a position opposite to the grinding wheel axis (path shown in the figure), and a bearing 18 is mounted parallel to this air cylinder 16 using another mounting material 1.
9.19, and the outer cylinder 20 is slidably fitted into this bearing 18, and the outer cylinder 20 is fixed (on the left in Fig. 3).
Attach an annular detection rod 21 for detecting the remaining surface of the outer cylinder 20 to the support hole 24 in the lower part of the support frame 23 attached to the tip of the rod 22 of the air cylinder 16 (the right end in FIG. 3). is fixed, and a sensing bolt 25 is screwed toward the upper part of this support frame 23 so as to be adjustable in and out, and a rear end proximity switch 26 attached to the pedestal 5 is opposed to the sensing bolt 25. establish. The main body 2 of the detection rod 14 is slidably fitted into the inner hole 27 of the outer cylinder 20.
A sliding tube 30 with a detection head 29 screwed thereon is fixed to the rear end of the annular detection rod 8, and an insulating ring 32 is interposed between the detection head 29 and the annular detection head 31 of the annular detection rod 21. The end face 33 of the detection head 31 and the tip 3 of the detection head 29
4 is the allowable height α of the remaining Paris BIT, which can be adjusted freely. This annular detection head 31 is connected to this insulating ring 32.
and the annular detection rod 2 attached via the holding cylinder 35.
1 is fixed to the outer cylinder 20 (left side in FIG. 6), and a compression spring 37 is interposed between the rear end surface of the outer cylinder 20 and the front end surface of the sliding cylinder 30. Then, a contact bolt 38 is screwed onto the tip (the right end in FIG. 7) of the main body 28 of the detection rod 14 which is slidably and elastically fitted into the outer cylinder 20, and the contact bolt 38 is screwed onto the end of the outer cylinder 20. A switch head 42 connected to a floatless switch (not shown) is attached to a mounting plate 41 attached to a fixed mounting member 39 via an insulating material 40 so as to be adjustable in and out.

In the figure, 43 is a dustproof plate, and 44 is another floatless switch (
(not shown).

(Effects of the Invention) The present invention has two detecting rods that are associated with each other, one of which is in contact with the cast surface or forged surface near the paring surface, and the other detecting rod is used to detect grinding surface marks (remaining surface of the paring surface). When the tips of these detection rods come into contact with the casting surface or the marks on the grinding surface, an electric signal is generated. The entire mechanism is structured so that it is pushed out toward the workpiece using an air cylinder, etc., and as the grinding wheel gradually wears out and more grinding remains, eventually the two detection rods emit an electric signal at the same time. Taking advantage of the timing, we created a configuration in which the entire grinding wheel grinding device is rotated by the equivalent pulse equivalent of the sensing rod gap, using a combination of screw mechanism and motor, and the device is moved by the screw to compensate. The present invention is unique in that, in combination with the casting surface detection device, it is possible to perform continuous deburring work without leaving any deburring, regardless of variations in the surface of cast and forged products.

[Brief explanation of the drawing]

Fig. 1 is a front view of a grinding device embodying the present invention, Fig. 2 is a side view thereof, Fig. 3 is a front sectional view of the automatic grinding wheel wear compensation device of the present invention, and Fig. 4 is a plan view thereof. Fig. 5 is a side view of the same, Fig. 6 is an enlarged rear sectional view of the automatic grinding wheel wear compensation device, Fig. 7 is an enlarged front sectional view of the same, Fig. 8 (a) and (b) are of the present invention. It is a route map explaining the action. (Explanation of symbols of main parts) 1: Grinding device 7: Frame 8: Motor
9: Drive motor 10: Grinding wheel 1
0°: Grinding wheel front 11: Grinding unit 12: Detection rod (for detecting the grinding front) 13: Grinding front detection device 14: Detection rod (for grinding wheel automatic wear compensation) 15: Grinding wheel automatic wear compensation device 16: Air cylinder 18: Bearing 20: Outer tube 21: Annular detection rod 22: Rod 23: Support frame 25: Sensing bolt 26: Two bodies of rear end proximity switch 28 (of the detection rod 14) 29: Detection head 30: Sliding tube 31: Annular detection head 32 : Insulating ring 33: End face (of the annular detection head) 37: Compression spring 40: Insulating material 42: Switch head A constant advance amount B: Burr Bl, cast surface B'': Remaining burr W: Workpiece material α: Tolerance β: Distance (between the remaining surface and the annular detection head surface) Fig. 5 Fig. 1 Fig. 2: !S L Ehi

Claims (1)

[Claims] A support frame is attached to the tip of a rod of an air cylinder installed horizontally on the frame of the grinding device so as to be movable back and forth, and an outer cylinder whose tip is fixed to the support frame is provided so as to be movable back and forth in parallel with the air cylinder. , the annular detection head of the annular detection rod is attached to the rear end of this outer cylinder via the base and the insulating ring, and the annular detection head is attached to the rear end of the main body of the detection rod slidably fitted into the inner hole of this outer cylinder. A sensor is provided with a sliding tube elastically installed so as to be slidable through a detection head and an insulating ring, a detection head of a detection rod attached to the rear end of the sliding tube, and attached to the support frame so as to be adjustable in and out. A bolt and a rear end proximity switch fixed to the frame are installed opposite each other, a switch head is attached to the lower part of the support frame through a mounting material and an insulating material so that it can be freely moved in and out, and the switch head is screwed to the tip of the main body of the detection rod. A grindstone automatic wear compensation mechanism characterized in that a contact bolt and the switch head are provided facing each other.