JPH0632283Y2 - Grinding amount detection mechanism in end grinding equipment such as punch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a grinding amount detecting mechanism in an apparatus for grinding an end face of a tool such as a punch in a punch press as a work material.

[Conventional technology]

In the punch of the punch press, the edge of the blade is sagged during use and the sharpness is reduced, so the end surface of the punch is ground at an appropriate timing.

In the conventional grinding of the punch end surface, the following problem has been pointed out because the tip side of the punch is cut and fed with respect to the grindstone or the cup grindstone of the surface grinder, and the grinding is performed by this cut feeding.

That is, in order to grind the punch tip by a small amount by cutting feed, there is a trouble that the cutting feed amount must be finely adjusted, dressing of the grindstone is performed appropriately, but if the grindstone wears, the entire grindstone must be replaced. It is necessary and disadvantageous in terms of cost.

In view of such a point, the applicant of the present invention first grinds the end surface of a punch or the like in order to grind the tip surface of a tool such as a punch, instead of the conventional cutting feed grinding. A device that can be used is Jpn.
Proposed as No. 5366.

The device previously proposed by the present applicant mounts a disk-shaped base metal that is rotated by a motor on a machine frame with its rotation axis oriented horizontally (the base metal is oriented vertically), and the front surface of the base metal In addition, a thin blade formed by electrodeposition or the like on the surface of a thin disk-shaped substrate having a cutting edge made of cubic boron nitride (hereinafter referred to as CBN) or diamond abrasive grains and having an outer diameter substantially the same as that of the base metal. While the grindstone is mounted detachably, a work parallel to the horizontal axis of rotation of the base metal is provided on the front side of the base metal, and this shaft is slidable and swingable with respect to the base metal. It is constructed by straddling a table, and this work table is equipped with a clamp that supports a work material such as a punch in a direction parallel to the rotation axis of the metal plate. Punches fixed to clamps, etc., against thin blade grindstones that are rotated by being rotated The end face of the workpiece, by pressing by 乍Ra swung by sliding the worktable,
The end surface of the work material is ground.

[Problems to be solved by the device]

The above-mentioned end face grinding device is a conventional end face grinding device because it can grind end faces such as punches without cutting feed, and if the grindstone wears, only the thin blade grindstone needs to be replaced. In comparison, it had advantages such as ease of use and low running cost, and was highly practical, but to measure the grinding amount, remove the work material such as punch from the clamp and measure it appropriately. There was the trouble that it had to be measured.

In addition, since it is possible to visually check the degree of sag of the blade before grinding, the work material such as the punch to be ground can be visually inspected before grinding so that it is necessary to know in advance before grinding how much grinding is sufficient. You can

Therefore, if the grinding amount can be detected during grinding, it is possible to grind the necessary amount while observing the detected value, so it is possible to prevent the grinding amount from becoming too large or too small,
Reasonable grinding becomes possible.

[Means for Solving the Problems]

Therefore, the present invention has been made for the purpose of providing an end surface grinding device capable of detecting the grinding amount during grinding, and the structure thereof is a disk-shaped device mounted on a machine frame and rotated by a motor. With respect to the whetstone, the work material clamp provided on the machine frame can be slid on a guide shaft parallel to the rotation axis of the whetstone and can be angularly swung on the guide shaft guiding the slide. In an end face grinding device for punches, which is provided and clamped by pressing the tip of a work material such as a punch against the grindstone, a guide shaft provided with the clamp is crossed with the guide shaft. A horizontally long cross hole is formed, and a cross pin is pierced through the cross hole to attach the cross pin to the shaft straddle portion of the clamp, while communicating with the cross hole on the guide shaft. Was to form a shaft hole, it is characterized in that it has 挿装 feeler to retractably by pressing the cross pin of the grinding amount detection means to the shaft hole.

Since the cross pin provided on the straddling portion of the slide shaft in the work material clamp moves in the same manner as the slide of the clamp, the contact point of the grinding amount detecting means that is pressed against and abuts on this pin is the cross pin. By following the sliding operation of, the amount of sliding of the clamp during grinding can be directly detected.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view with a part in section of an end surface grinding device having an example of the mechanism of the present invention, FIG. 2 is a right side view of FIG. 1 with a part in section, and FIG. FIG. 4 is a front sectional view of the main part of an example in which the means is attached, and FIG. 4 is a view taken along the line XX in FIG.

Reference numeral 1 is a machine frame having a hollow barrel shape with a substantially rectangular side cross section, and has a vertical partition wall portion 1a provided inside and a horizontal dish-shaped portion 1b provided outside.

Reference numeral 2 denotes a shaft 2a in a horizontal direction which is attached to a bearing portion 3 formed on the partition wall portion 1a of the machine frame 1 via a bearing 3a.
It is a disc-shaped base metal attached to the tip of. This base metal 2
Is positioned inside the vicinity of the right end surface (see FIG. 1) of the machine frame 1 having a body shape and faces the dish-shaped portion 1b. Reference numeral 1c is a cover plate attached to the right end surface of the machine frame 1, and 1d is a hole provided in the center of the cover plate 1c.

A pulley 2b is attached to the rear end of the shaft 2a, and the rotation of an output pulley 4a of a motor 4 disposed inside the machine frame 1 is introduced into the pulley 2b via a belt 4b. Has been done.

Reference numeral 2A is a thin blade grindstone attached to the front surface of the base metal 2, and here, as an example, a thin perforated hole made of a material such as CBN or SUP, SK, SUS, SPCC capable of electrodepositing diamond abrasive grains. It is formed by electro-depositing CBN or diamond abrasive grains on one surface of the disc. The outer diameter of the thin blade grindstone is approximately the same as that of the base metal 2.

Thus, the thin blade grindstone 2A has a hole in the center thereof,
The holding member 2B and the set screw 2C are detachably attached to the base metal 2 with the electrodeposited surface of CBN or diamond abrasive grains facing outward.

Reference numeral 5 denotes bearing portions 5a, 5 formed on the dish-shaped portion 1b of the machine frame 1.
b is a guide shaft that is installed in a direction parallel to the shaft 2a of the base metal 2, and 6 is a work table that is rotatably and slidably mounted on the shaft 5. A handle 6a is attached with an inclination angle.

Reference numeral 7 denotes a vise mounted on the upper surface of the work table 6, and on the base 7a fixed to the work table 6 as shown in FIG. A fixed portion 7b formed on the work receiving surface is provided, and a movable portion 7c is provided movably and fixedly on the base 7a so as to correspond to the fixed portion 7b. In this vise 7, 71a is a horizontally oriented female screw portion attached to the rear upper surface of the base 7a, 71c is a male screw screwed onto the female screw portion 71a and provided on the rear surface of the movable portion 7c, 72a
Is a mounting screw for the base 7a, 71b is a mounting screw for the fixed portion 7b, and 72c is a fixing screw mounted on the lower surface of the movable portion 7c.

Then, the work material W such as a punch to be ground is sandwiched between the work receiving surface of the fixed portion 7b of the vise 7 and the tip of the movable portion 7c as shown by the broken line in FIG.

That is, the vise 7 loosens the fixing screw 72c of the movable portion 7c and turns the male screw 71c to move the movable portion 7c backward or forward on the base 7a to adjust the thickness of the work material W to the workpiece. The material W is pressed against the front surface of the fixed portion 7b to be clamped. The work table 6 and the vise 7 form the work material clamp in the present invention.

Here, the work table 6 in which the work material W is sandwiched by the vise 7
Holds the handle 6a and pushes and pulls along the guide shaft 5 to move the tip surface of the work W to the thin blade grindstone 2 of the base metal 2.
It can be pressed or separated from the side orthogonal to the outer surface of A.

Further, if the handle 6a is swung about the guide shaft 5, the work material W pressed against the thin blade grindstone 2A of the base metal 2 will be described.
The position of the front end surface of can be changed along the surface of the thin blade grindstone 2A of the base metal 2.

In the end surface grinding apparatus of the present invention, when the work table 6 is pressed against the grindstone surface by the work table 6 and the work table 6 is swung about the guide shaft 5, the tip surface of the work material W is the grindstone surface. The following stopper 8 is provided as a swing restriction mechanism that prevents the stopper 8 from coming off.

The stopper 8 is a right hand front surface (left side surface in FIG. 2) of the machine frame 1 shown in FIG. 1, and is a protruding portion from the machine frame 1 side to the vise 7 side in the vicinity upper position of the vise 7. As described above, the first stopper member 8a is formed by a member having a "side cross-section substantially" shape, while a side cross-section is formed on the upper surface of the movable portion 7c of the vise 7 corresponding to the first stopper member 8a. The second stopper member 8b is formed by the forming member. Incidentally, 81a and 81b are cushioning materials, respectively.

The stopper 8 functions as follows.

When the work table 6 is swung counterclockwise about the shaft 5 when the work table 6 is in the state shown in FIGS. 2A and 2B, the front surface of the second stopper member 8b is the first stopper at the cushioning member 81b. It abuts the back surface of the member 8a and cannot swing further.
Similarly, when the work table 6 is swung in the clockwise direction about the axis 5, the upper surface of the movable portion 7c of the vise 7 comes into contact with the cushioning material 81a on the lower surface of the first stopper member 8a and cannot be swung any further.

Therefore, even if the front end surface of the work material W such as a punch fixed to the vice 7 of the work table 6 is pressed against the grindstone surface 2A and rocked, the work material W does not come off from the grindstone surface 2A.

Here, even if the outer diameter of the work material W is reduced and the movable portion 7c of the vise 7 is located in front of the base 7a (on the right side in FIG. 2), the allowable swing range is expanded, Both stopper members 8a and 8b operate in the same manner as in the above example.

The stopper 8 described above exerts a stopper action when the work table 6 is near the left end of the guide shaft 5 as shown in FIG. 1. Therefore, if the work table 6 is slid to the right side of the guide shaft 6, The above action of the stopper 8 is released.

Reference numeral 9 is a dish-shaped container provided on the upper part of the machine frame 1 and contains a grinding liquid as appropriate. Reference numeral 9a is a cock provided at the bottom of the grinding fluid container 9 and is provided in the middle of the grinding fluid supply pipe 9b, and the tip 9c of this pipe is made to face the thin blade grindstone 2A of the base metal 2.

Reference numeral 10 denotes a carrying handle provided above the machine frame 1 and below the cutting agent container 9.

Since the grinding amount grinding mechanism of the present invention is provided between the work table 6 and the guide shaft for guiding and supporting the sliding operation of the table 6 in the end surface grinding apparatus as described above, this mechanism will be described next. Will be described.

In FIG. 1 and FIG. 2, 11a is a horizontally long cross hole which is provided in the middle of the guide shaft 5 on which the work table 6 is mounted, and which extends through the work shaft 6 in the direction transverse to this shaft, and 11b is this cross hole. With a cross pin penetrating 11a and mounted on the straddle portion 6b of the work table 6,
The pin 11b performs the same operation as the work table 6 in the cross hole 11a when the work table 6 slides or swings.

Reference numeral 11c is a shaft hole formed on the shaft of the guide shaft 5, and the front end of the hole communicates with the cross hole 11a and the rear end thereof is formed by the shaft 5
The rear end (right end in FIG. 1) is opened.

Reference numeral 11d is a connecting pin that is closely inserted so as to be slidable in the shaft hole 11c. The tip (left end in FIG. 1) of the pin 11d is in contact with the cross pin 11b, and the rear end is the shaft hole. It faces the large diameter portion 11c 'of 11c.

Thus, the stem 12a of the dial gauge 12 is fitted to the open end of the large diameter portion 11c 'in the shaft hole 11c, and the spindle 12b of the dial gauge 12 is located in the shaft hole 11c from the stem 12a to the rear. Is extended by being pressed by the spring force, and the probe 12c at the tip thereof is brought into contact with the connecting pin 11d while being pressed.

12d is a screw for fixing the stem 12a, and the above 11
An example of a grinding amount detection mechanism is constituted by a to 12d.

The detection mechanism operates as follows.

Now, the punch is fixed as the work material W to the vise 7 of the work table 6, and the work table 6 is attached to the rotating thin blade grindstone 2A.
Is moved along the guide shaft 5 so as to press the work W while holding the handle 6a, the cross pin
11b moves together with the work table 6.

When the cross pin 11b moves, the connecting pin 11b
The probe 12c of the dial gauge 12 that is in contact via the d
Advances through the shaft holes 11c, 11c ', and the amount of advance is displayed on the dial gauge 12 by a pointer or a digital display.

Therefore, the amount of movement of the cross pin 11b is displayed on the dial gauge 12 as the amount of advance of the tracing stylus 12c, and this displayed value indicates the amount of grinding of the work material at this time.

In the mechanism of the present invention, the dial gauge 12 is replaced by a third
A so-called linear scale 12 'as shown in FIG. 4 and FIG. 4 can be used as a grinding amount detecting means. This linear scale 12 ', if the advance / retreat of the spindle 12b' having a probe 12c 'at the tip is detected electrically, or magnetically, or by an appropriate signal such as an optical signal,
Any structure will suffice. In FIG. 4, 13 is an attachment for fixing the scale 12 ', which is the rear end of the guide shaft 5 and the stem 12a' of the scale 12 '.
And the tip of is clamped by a screw 13a for connection.

As described above, one example of the end surface grinding apparatus having the mechanism of the present invention is constructed. Next, an example of its use will be described.

First, the handle 6a of the work table 6 is grasped and the work table 6 is moved rightward along the guide shaft 5 (see FIG. 1). In this state, the vise 7 is opened, the work material W whose tip is to be polished, for example, a punch is sandwiched, and the vise 7 is closed to hold the work material W in a fixed manner. At this time, the tip side of the work material W is made to protrude from the left side surface of the vise 7 by an appropriate amount in FIG.

In this state, the work table 6 is moved to the left to bring the tip of the workpiece W into static pressure contact with the surface of the thin blade grindstone 2A, and the dial gauge is set to zero. Then, a motor switch (not shown) is turned on to rotate the thin blade grindstone 2A at high speed together with the base metal 2, then the handle 6a of the work table 6 is grasped, and the work table 6 is guided along the guide shaft 5 to the thin blade grindstone. When a force is applied so as to press it toward the 2A side, the tip of the work material W is pressed against the CBN of the thin blade grindstone 2A that is attached to the base metal 2 and is rotating, and the electrodeposition surface of the diamond abrasive grains. The tip surface of the work material W is ground smoothly. The grinding amount at this time is obtained by observing the work material W in advance and roughly estimating the grinding amount, and pressing the work table 6 against the thin blade grindstone 2A until the dial gauge 12 indicates the estimated grinding amount. adjust.

In the swinging of the enclosure of the guide shaft 5 of the work table 6 during the grinding operation, the first stopper member 8a abuts the upper surface of the movable portion 7c of the vise 7 to regulate the clockwise swinging, and The stopper member 8b contacts the back surface of the first stopper member 8a to regulate the counterclockwise swing. That is, the stopper 8 prevents the tip of the punch, which is the work material W, from deviating from the grindstone surface during this swing.

When the grinding amount displayed on the dial gauge 12 reaches a desired value, the handle 6a is pulled to the right side of the guide shaft to separate the tip end surface of the work material W from the grindstone surface, and the motor 4 is stopped. The W is removed from the vise 7, and the grinding work is completed.

[Effect of device]

As described above, according to the mechanism of the present invention, when re-grinding a tool whose tip is worn such as a punch or a pin, in the conventional device, the re-grinding is performed with respect to the grindstone or the cup grindstone of the surface grinder. The work to be ground, such as the tool to be ground, is sent by cutting in the feed direction and cut, but it is sufficient to press the tip surface of the tool against the thin blade grindstone and swing it. In particular, during this pressing grinding, the grinding amount of the work material can be adjusted to the desired grinding amount while looking at the display of the detector such as the dial gauge, so it is possible to know at a glance how much grinding has been done, and also to perform over-grinding or under-grinding. The unique effect of not occurring is obtained.

The present invention is as described above, and is extremely useful as a mechanism for completing the grinding operation of a device for re-grinding the tip surface such as a punch or a pin.

[Brief description of drawings]

FIG. 1 is a front view with a part in section of an end surface grinding device having an example of the mechanism of the present invention, FIG. 2 is a right side view of FIG. 1 with a part in section, and FIG. FIG. 4 is a front sectional view of the main part of an example in which the means is attached, and FIG. 4 is a view taken along the line XX in FIG. 1 ... Machine frame, 2 ... Base metal, 2A ... Thin blade grindstone, 3 ... Bearing section, 4 ... Motor, 5 ... Guide shaft, 6 ... Work table, 7 ... Vise, 8 ... Stopper , 8a ... First stopper member, 8b ... Second stopper member, 9 ... Grinding fluid container, 10 ... Handle, 11a ... Cross hole, 11b ... Cross pin, 11c ... Shaft hole, 11d ... Connecting Pin, 12 ... Dial gauge, 12a ... Stem, 12b ... Spindle, 12c
...... Sensor, 12d …… Fixing screw

Claims (1)

[Scope of utility model registration request] 1. A disk-shaped grindstone mounted on a machine frame and rotated by a motor, and a work material clamp provided on the machine frame is slid on a guide shaft parallel to a rotation axis of the grindstone. An end face grinding device for a punch or the like, which is provided so as to be capable of being angularly swung on a guide shaft for guiding the slide, and which grinds by pressing the tip of a work material such as a clamped punch against the grindstone. In the guide shaft provided with the clamp, a laterally long cross hole intersecting the shaft is formed, and a cross pin is attached to the shaft straddle portion of the clamp while penetrating the cross hole, while the guide is provided. A shaft hole communicating with the cross hole is formed on the shaft, and the probe of the grinding amount detecting means is pressed against the cross pin into the shaft hole so that the shaft hole can be moved back and forth. Grinding amount detection mechanism at the end face grinding apparatus of the punch or the like that.