JPH0796451A - Cutter polishing device - Google Patents

Abstract

PURPOSE:To efficiently carry out polishing work by coaxially arranging a grinding wheel to carry out rough grinding and a grinding wheel to carry out finish polishing and by directing the grinding surface and the polishing surface of these grinding wheels towards the same direction with a step. CONSTITUTION:By furnishing two grinding wheels G1, G2 coaxially and polishing only the blade surface side of a planer knife W by them, edging work is carried out. At this time, as there is an angle difference set by an angle setting means D on a grinding surface (a) at the time of rough grinding and a polishing surface (b) at the time of finish polishing, it is possible to precisely carry out polishing work by way of applying it only to the edge of the polishing surface (b). Additionally there is a step difference in the longitudinal direction on the polishing surface (b) and the grinding surface (a), they don't interfere with each other at the time of grinding and polishing, and working can be smoothly carried out.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade polishing apparatus which can simplify the entire structure and can efficiently perform a polishing operation. 2. Description of the Related Art A polishing machine for finishing planer blades and the like moves reciprocally by mounting the planer blade on a tool rest, while at the same time providing a grinding wheel corresponding to the tool rest, and this grinding wheel is used for the above-mentioned planer blade. The polishing process is performed by cutting in a direction orthogonal to the reciprocating direction. This type of polishing machine is already known, for example, from Japanese Patent Publication No. 62-22283 proposed by the present applicant. [0003] A planer blade for cutting wood is required to have a particularly sharp blade. Therefore, in the polishing work, the cutting edge is ground with a rough grinding wheel, and then this portion is ground with a finishing grinding wheel. Is done in this way. The above-mentioned rough grinding wheel and finishing grinding wheel are separately equipped depending on the reduction of the grinding stone, the quality of the abrasive grains, the difference in the grain size, and the like. The above-mentioned rough grinding wheel and finishing grinding wheel are arranged in parallel in the reciprocating direction of the planer blade. Therefore, for example, in order to sharpen a blade having a length L, a reciprocating stroke which is the blade length L plus the arrangement distance l of the grinding wheel is required. In order to perform careful polishing, it is necessary to repeat the reciprocating motion a large number of times, and as a result, there arises a problem that a wasteful stroke causes a redundant polishing time. Further, since the guide mechanism for guiding the reciprocating stroke becomes long, naturally, the adverse effect that the entire machine becomes large is brought about. Furthermore, since a plurality of driving means for the grinding wheel are required, it is inevitable that the structure becomes complicated. The present invention has been made by paying attention to such problems of the conventional technology, and can perform polishing work efficiently,
Moreover, it is an object of the present invention to provide a blade polishing device that can simplify the configuration. In order to achieve the above object, the blade polishing apparatus according to the present invention is constructed as follows. That is, the gist of the point is that the grinding wheel for polishing the planer blade is composed of a grinding wheel for rough grinding and a grinding wheel for finish polishing, and both grinding wheels are arranged on the same rotary shaft. The grinding and polishing surfaces of both grinding wheels are arranged in the same direction with a step. The grinding point of the grinding wheel for rough grinding and the grinding point of the grinding wheel for finish polishing can be set close to each other in the reciprocating direction. For this reason, useless reciprocating strokes can be minimized, and efficient polishing work can be performed. Further, since the two grinding wheels can be rotated by the same driving means, the entire structure can be simplified. [Embodiment] An embodiment of a blade polishing apparatus according to the present invention will be described below. FIG. 1 is a front view of this apparatus. FIG. 2 is a plan view of the same. 1 is a frame 2 is a bed 3 is a rear mounting position on the bed 2 (the upper side of FIG. 2). The horizontal guide rail 4 provided on the upper surface of the frame 3 is a support frame movably arranged at the front position on the bed 2 (the lower side of FIG. 2) corresponding to the mounting frame 3. Reference numeral 6 denotes a carriage A movably arranged on the guide rail 5. Reference numeral A denotes a reciprocating drive means for driving the carriage 6 in the left-right direction in FIG. 1. The reciprocating drive means A is a reversible drive motor 7.
a, and a transfer belt 7 that is normally and reversely transferred by this motor
b, one end of the belt is connected to the carriage 6. Limit switches (not shown) are provided at appropriate positions on both ends of the transfer path of the carriage 6, and the reversible drive motor 7a is reversed by a detection signal of this switch to transfer the carriage 6 reciprocally. Reference numerals 8a and 8b denote a pair of left and right bearing cylinders 9 arranged on the vertical mounting surface of the carriage 6, and a tool holder rotatably provided on the bearing cylinders 8a and 8b. The mounting surface 10 is provided, and the planer blade W is attached to the blade mounting surface 10 with the blade surface E being substantially vertical. The configuration of the tool rest 9 will be described later in detail. On the other hand, the front supporting frame 4 is provided with a group of grinding wheels that move forward and backward in a direction orthogonal to the reciprocating direction of the tool rest 9. This grinding wheel group is provided on the rotating shaft 11 of the electric motor M arranged rearward, and is constituted by a first grinding wheel G1 for rough grinding and a second rough grinding wheel G2 for finish polishing. These first grinding wheel G1 and second grinding wheel G
The detailed configuration of No. 2 will be described later. The support frame 4 is located at a substantially middle portion in the reciprocating direction, and a slide guide 12 in the front-rear direction is provided on the upper portion thereof. A feed table 13 is arranged on the slide guide 12, and an electric motor M is mounted on the feed table 13 via an angle setting means D. Sending stand 13
Is the first and second grinding wheels G1 and G by the front-rear feeding means B constituted by the feed screw shaft 14 and the control motor Ma.
Drive 2 back and forth. A slide guide 15 is provided on the vertical surface of the support frame 4, and the slide guide 15 is used as the frame 1.
Engages with a slide bearing 16 provided on the front surface of the. The support frame 4 drives the first and second grinding wheels G1 and G2 up and down by the up-and-down feeding means C configured by the feed screw shaft 17 and the control motor Mb. The structure of the angle setting means D and the first and second grinding wheels G1 and G2 will be described in more detail. In FIG. 3, reference numeral 18 is a mounting bracket 19 provided on the feed table 13, and 19 is a mounting plate which is rotatable by a horizontal support shaft 20 of the mounting bracket 18, and the electric motor M is mounted on the mounting plate 19. Reference numeral 21 is a lower limit stopper provided on the lower side corresponding to the free end of the mounting plate 19. The lower limit stopper 21 sets the rotary shaft 11 of the electric motor M in a horizontal state at the regulating position. Reference numeral 22 is a lift limit stopper provided on the upper side of the mounting plate 19. This lift limit stopper 22 sets the tip of the rotary shaft 11 in a slightly downward state at the regulating position.
The mounting plate 19 is tiltable within a range regulated by two stoppers. Reference numeral 23 is an adjusting screw shaft for adjusting the height of the ascent end stopper 22, and reference numeral 24 is an operating handle for the adjusting screw shaft 23. Reference numeral 25 denotes a passive piece provided under the mounting plate 19.
Reference numeral 26 denotes an eccentric wheel type operating member Mc engaged with the passive piece 25.
Is a drive motor for operating the operating member 26. When the operating member 26 is biased downward, the passive piece 25 is attached to the mounting plate 1.
9 is set to the descending position where it comes into contact with the descending limit stopper 21,
On the contrary, when the actuating member 26 is biased upward, the passive piece 25 sets the mounting plate 19 to the ascending position where it abuts the ascending limit stopper 22. Next, the first and second grinding wheels G1 and G2 will be described. The first grinding wheel G1 includes a flange plate 27 attached to the root of the rotary shaft 11, a cylindrical base metal 29 having bolts 28 fixed to the outer peripheral portion of the flange plate 27, and an abrasive grain layer 20 provided on the front end surface of the cylindrical base metal 29. Compose by. A large hole 31 is provided at the center of the cylindrical base metal 29. The second grinding wheel G2 includes a cup base metal 32 attached to the rotary shaft 11 and an abrasive grain layer 33 provided on the front end surface of the cup base metal 32. The bottom surface of the cup base metal 32 is in close contact with the above-mentioned flange plate 27, and the outer dimension is formed smaller than the diameter of the hole 31 described above. Further, the grinding surface a of the first grinding wheel G1 and the grinding surface b of the second grinding wheel G2 are set with a step, and the latter is retracted from the former. Reference numeral 34 is a whetstone stop nut screwed to the tip of the rotary shaft 11. Next, the structure of the tool rest 9 will be described in detail with reference to FIGS. That is, the inner bearing 43 is rotatably fitted in the above-mentioned left bearing sleeve 8 a, and the pressing screw 44 is screwed into the inner bearing 43. Then, the taper tip of the support shaft 45 is pushed into the tool rest 9 side by the pressing screw 44. Similarly, a pressing screw 44 and a support shaft 45 having a tapered tip are provided on the right bearing tube 8b, and the tapered tip is attached to the tool post 9
Push it to the side. A tilt bearing 46 is provided on the left bearing sleeve 8a.
Is integrally provided, and the handle shaft 47 is supported by the tilt bearing 46. A worm 48 is attached to one end of the handle shaft 47, and the worm 48 is engaged with a worm wheel 49 attached to the end of the internal bearing 43. And
By operating the handle shaft 47, the tool rest 9 is rotated to adjust the inclination angle of the tool mounting surface 10. This inclination angle is set according to the blade angle of the planer blade W. On the other hand, as shown in FIG. 5, on the back side of the tool post 9,
The mounting stay 50 is fixed downward, and the switch actuating piece 51 is provided rearward on the rear surface of the mounting stay 50. On the other hand, the mounting board 52 is fixed to the internal bearing 43, and the limit switch SW corresponding to the switch operating piece 51 is mounted on the mounting board 52. In addition, the switch operating piece 51 in the mounting stay 50
Is provided in the vicinity of the seat 53 and the seat 53 and the mounting substrate 52.
A contraction spring 54 is arranged between the and. Due to the elasticity of the compression spring 54, the tool rest 9 is given a tendency to rotate clockwise in FIG.
Then, the limit switch SW and the switch operating piece 51
Are set to a separation tendency. Reference numeral 55 denotes an abutment piece 56 provided on the upper end on the back side of the tool post 9 and reference numeral 56 denotes a rotation restricting piece provided on the mounting substrate 52 side corresponding to the abutment piece 55.
Set the tilt position of. Reference numeral 57 denotes an electromagnetic solenoid on the side of the mounting substrate 52 which is provided in correspondence with the suction plane 58 of the mounting stay 50. It is attracted and fixed, and the tool rest 9 is fixed and held. The electromagnetic solenoid 57 is operated by the detection signal of the limit switch SW or the excitation signal of the electric control circuit (not shown). It should be noted that, as indicated by the phantom line in FIG.
Is a set ruler piece 60 provided on the lower part of the tool mounting surface 10 of the tool rest 9; a tool holding metal fitting 61 provided on the upper side corresponding to the base metal part of the planer blade W; It is an attached bolt. The set ruler piece 59 is detachable, and is removed from the tool rest 9 after the planer blade W is attached. The configuration of the blade polishing apparatus according to one embodiment is as described above, and the polishing of the planer blade W is performed as follows. That is, as shown in FIG. 5, the blade mounting surface 10
After attaching the flat blade W, the handle shaft 47 of FIG. 4 is operated to rotate the tool rest 9 to match the angle of the cutting edge for sharpening. By this operation, the blade surface E of the planer blade W is set in a substantially vertical state. Figure 1 shows how to install the planer blade W.
The carriage 6 is moved to the left end as shown in FIG. When the installation of the planer blade W is completed,
The reciprocating drive means A is operated to set the tool rest 9 at the center position of the reciprocating stroke, and the blade surface E corresponds to the first and second grinding wheels G1 and G2. On the other hand, on the grinding wheel G1, G2 side, the angle setting means D is operated to rotate the mounting plate 19 upward, and the mounting plate 19 is regulated by the ascending end stopper 22. By this operation, the rotary shaft 11 is in a state where the tip thereof is lowered, and the polishing surface a and the grinding surface b are slightly inclined. When the tilting operation of the grinding wheels G1 and G2 is completed, the lifting and lowering feed means C adjusts the grinding wheels G1 and G2 up and down, and the grinding surface a of one of the first grinding wheels G1 is a planer blade W.
Set the height according to the blade surface E of. After this setting, the front-rear feed means B is operated to operate the above grinding wheels G1 and G.
2 is driven forward. By this movement, the first grinding wheel G
The ground surface a of No. 1 abuts on the tip of the planer blade W. (See FIG. 6) By the above-mentioned abutting operation, the tool rest 9 rotates counterclockwise about the support shaft 45, and as a result, the limit switch SW outputs a detection signal. The electromagnetic solenoid 57 is excited by this signal, and the tool rest 9 is fixedly held. At the same time, the detection signal causes the turret 9
Starts reciprocating motion, and the electric motor M causes the grinding wheels G1 and G2 to start rotating. The reciprocating stroke of the tool rest 9 is shown in FIG.
In, when the tool rest 9 moves to the right, the left end of the planer blade W passes the grinding wheels G1 and G2, and when it moves to the left, the right end of the planer blade W reaches the minimum range where it passes the grinding wheels G1 and G2. Set. The stroke adjustment is performed by adjusting the position of a limit switch (not shown) that controls the reversing operation of the reversible drive motor 7a. At the same time when the above grinding operation is started, the control motor Ma is driven stepwise from the detected position as a reference point, and the first grinding wheel G1 is moved forward. Due to the cutting of the grinding wheel, the blade surface E of the planer blade W is ground, and chipping and wear of the blade edge are eliminated. The above-mentioned depth of cut is preset according to the size of a chip or the like, and this is automatically given by an electric control circuit (not shown). After the rough grinding of the planer blade W is completed in this way, the front-rear feed means B is used to grind wheels G1 and G2.
Is moved to the front retracted position, and then the reciprocating operation of the tool rest 9 and the fixing operation of the tool rest 9 by the electromagnetic solenoid 57 are stopped. In addition, the tool rest 9 is a planer blade W for the grinding wheels G1 and G2.
Stop at the position corresponding to. To carry out finish polishing following the above rough grinding,
The rotating shaft 11 of the electric motor M is set in a horizontal state by the angle setting means D. By this operation, the polishing surface b of the grinding wheel G2 becomes vertical. Next, the elevation feed means C is operated to set the height of the polishing surface b of the second grinding wheel G2 in accordance with the cutting edge of the planer blade W. Then, after the above position setting, the grinding wheel G2 is driven forward by the front-rear feeding means B. By this movement of the grinding wheel, the polishing surface b comes into contact with the tip of the planer blade W. (See FIG. 7) The detection operation after this contacting operation, the polishing operation, and the like are performed in the same manner as the above-described rough grinding. Since the polishing point of the second grinding wheel G2 during the finish polishing is almost the same as the grinding point of the first grinding wheel G1 during the rough grinding, the range of the reciprocating stroke can be set to be the same. Further, since there is an angle difference set by the angle setting means D between the grinding surface a during rough grinding and the grinding surface b during finish grinding, the grinding surface b is applied to only the cutting edge to perform grinding work properly. It can be carried out. Further, since the polishing surface b and the grinding surface a have a step in the front-rear direction, there is no interference during polishing or polishing, and work can be performed smoothly. In the above-described embodiment, the tool rest 9 side to which the planer blade W is attached is provided so as to be rotatable, and this movement is detected by the limit switch SW to confirm the position of the cutting edge. However, the relative relationship may be reversed so that the grinding wheel side is movably provided, for example, so that it can be moved back and forth, the movement thereof is detected, and the blade edge position may be confirmed by the detection signal. Further, in one embodiment, the angle difference between the rough grinding and the finish polishing is adjusted by the rotation adjustment on the grinding wheel side, but it is needless to say that it may be performed on the tool rest side equipped with the planer blade W. Further, in one embodiment, two grinding wheels G1 and G2 are provided on the same shaft, and only the blade surface side of the planer blade W is polished by this so as to perform blade processing. However, as shown in FIG. 8, three grinding wheels G3, G4, G are mounted on the same axis.
By providing No. 5, not only the blade surface but also the blade back surface can be polished, and the blade edge and the back blade surface can be polished simultaneously.
Hereinafter, this embodiment will be described. The first rough grinding wheel G3 has a cylindrical grinding peripheral surface c, and this grinding peripheral surface c corresponds to the blade surface E of the planer blade W to form the flank F shown in FIG. Grind. Second
The rough grinding wheel G4 has two conical grinding peripheral surfaces d and e, and corresponds to the back surface H of the planer blade W. And
The rake face J is ground by the one grinding peripheral surface e, and the back blade surface K is ground by the other grinding peripheral surface d. The third finishing grinding wheel G5 has two conical polishing peripheral surfaces f and h and a cylindrical polishing peripheral surface j,
The conical polishing peripheral surfaces f and h are finish-polished in correspondence with the rake face J and the back edge face K, respectively. The tip of the flank F is polished so that the cylindrical peripheral surface j corresponds to the blade surface E. Polishing of the back edge surface K by the second rough grinding wheel G4 and the second finishing grinding wheel G5 requires accurate machining of an extremely fine portion, so that the shape of the grinding wheel can be maintained durable.
A (Cubic Boron Nitride) grindstone is recommended. As described above, three grinding wheels G are provided on the same axis.
Even when 3, G4 and G5 are attached, the grinding point or the polishing point of each grinding wheel does not change significantly. For this reason,
The reciprocating stroke range of the planer blade can be set as small as possible. In addition, in one embodiment including this embodiment, the rotary shaft 11 of the electric motor M is directly used as the mounting shaft, but the mounting shaft is held in the bearing tube, and the electric motor is connected thereto via the transmission member. It may be configured. As described above, in the blade polishing apparatus according to the present invention, the grinding wheel for rough grinding and the grinding wheel for finish polishing are arranged on the same axis, and the grinding surfaces of these grinding wheels are The polishing surface and the polishing surface are stepped and are oriented in the same direction. Therefore, the grinding point or the polishing point of each grinding wheel can be set close to each other, and the polishing work can be efficiently performed without requiring an extra reciprocating stroke. Further, since only one rotating shaft is required, the excellent effect that the entire structure including the driving means can be simplified is exhibited.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing the overall configuration of a blade polishing device according to the present invention. FIG. 2 is a plan view of the same. FIG. 3 is a partially longitudinal side view showing the structure of a grinding wheel. FIG. 4 is a partial cross-sectional plan view showing the configuration of a tool post. FIG. 5 is a vertical cross-sectional side view showing the configuration of the tool rest. FIG. 6 is an explanatory diagram of a grinding state by a grinding wheel for rough grinding. FIG. 7 is an explanatory diagram of a polishing state by a grinding wheel for finish polishing. FIG. 8 is an explanatory view showing another embodiment of the constitution of the grinding wheel. FIG. 9 is an explanatory view showing the shape of a planer blade. [Explanation of Codes] 4 Support Frame 6 Reciprocating Platform A Reciprocating Driving Means 9 Turret Platform 10 Tool Mounting Surface M Electric Motor 11 Rotating Axis W Plane Blade G1 First Grinding Wheel G2 Second Grinding Wheel a Grinding Surface b Polishing Surface B Front-rear feeding means C Elevating feeding means D Angle setting means 19 Mounting plate Ma Control motor Mb Control motor Mc Drive motor

Claims (1)

What is claimed is: 1. A planing blade and a grinding wheel are disposed so as to face each other, and both are relatively moved back and forth in the longitudinal direction of the planing blade, and one of the planing blade side and the grinding wheel side is reciprocated. In a blade polishing machine that is designed to move in a cut in a direction orthogonal to the moving direction, the above grinding wheel is composed of at least a grinding wheel that performs rough grinding and a grinding wheel that performs finish polishing, and both grinding wheels rotate in the same direction. A blade polishing device characterized in that it is arranged on a shaft and the grinding and polishing surfaces of both grinding wheels are arranged in the same direction with a step.