JPS63207546A - Grinding method for fine diametral work and grinding attachment - Google Patents

Abstract

PURPOSE:To aim at improvement in work efficiency, by tilting a work aggregate of hypodermic needles, etc., so as to compensate for a portion equivalent to an abrasive loss to be produced at the time of one stroke grinding of a grindstone, and grinding a grinding groove by the stone. CONSTITUTION:A work aggregate 17 of fine diametral bar works 15 is fixed and held onto a work holding surface 6b of a work holder 5, a driving cylinder 9 is projected out, and a body 6 of the work holder 5 is rocked as far as the specified angle theta1 in a C direction. And, the work holder 5 is moved in a B direction together with a table 3 while rotating a softish grindstone 12 in a G direction, each of fine diametral bar works 15 is transversely ground for grooving one after another. In this case, A DIAMETER (d) of this softish grindstone 12 is gradually decreased, but the work aggregate 17 is tilted as far as the specified angle so as to compensate for the abrasive loss, so that each grinding groove of the specified depth is formed in all works 15. Thus, one time of in feed is able to be largely taken and, what is more, work efficiency is improvable in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a thin rod-like workpiece that can efficiently grind a small-diameter rod-like workpiece such as a hypodermic needle, that is, a narrow-diameter rod-like object workpiece. The present invention relates to a method and a grinding device for grinding a diameter rod-shaped object work.

(b), Prior Art Usually, in a grinding device, a plurality of small-diameter rod-shaped object workpieces are ground, and a sixth
In order to form a grinding groove having a predetermined depth as shown in the figure, first, these small-diameter rod-shaped workpieces are fixed and held on the workpiece holding surface of a workpiece holder provided on a table.

Next, the disc-shaped grinding wheel 12 is fed into the small-diameter rod-shaped object workpiece 15 a predetermined number of times, and the table is moved together with the work holder by a predetermined distance, and the grinding wheel is applied to the workpiece to a predetermined depth. A grinding groove 15E is formed. Conventionally, the above-described work holder has been provided so that the work holding surface is parallel to the moving direction of the table.

(C) 0 Problems to be Solved by the Invention However, since a soft grindstone is used to prevent the small-diameter rod-shaped object workpiece from being burnt by grinding, the amount of wear caused by grinding is large. Therefore, in order to form grinding grooves having a predetermined depth with good machining accuracy in all of these small-diameter rod-like workpieces, it is necessary to reduce the amount of wear of the grindstone that accompanies grinding per -turn.

To achieve this, it is necessary to reduce the amount of feed of the grindstone per time, but if this is done, the workpiece must be ground several times, reducing machining efficiency.

In order to solve the above-mentioned problems, the present invention is capable of efficiently grinding a plurality of small-diameter rod-like workpieces to form a grinding groove having a predetermined depth in each small-diameter rod-like workpiece. An object of the present invention is to provide a method and a grinding device for grinding a small-diameter rod-shaped object work.

(d) Means for solving the 0 problems, that is, the method invention of the present invention is a workpiece assembly (17
) is tilted by an amount corresponding to the amount of wear generated during the - stroke grinding of the grindstone (12) in a manner that compensates for the amount of wear, and in this state, the grinding groove (15) by the grindstone (12) is
E) The grinding process is performed.

Further, in the present invention, the invention of the device includes a work holder (5).
is configured to be swingable so that the work assembly (17) can be positioned in an inclined manner with respect to the grinding direction of the grindstone.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. r (e) below
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the method invention of the present invention allows the workpiece assembly (1
7) is shifted in the direction of the grindstone (in the direction of arrow E) and is positioned and ground.

, Also, in the present invention, the invention of the device includes a work holder (5
), each small-diameter rod-shaped object/body workpiece (1
5) is shifted by a distance corresponding to the amount of wear of the grinding wheel (12) as the grinding progresses.

(f), Example An embodiment of the present invention will be described below based on the drawings.

Figures 1 to 5 are process diagrams showing the process of grinding a small-diameter rod-shaped object workpiece using the present invention, and Figure 6 shows the state of a body-diameter rod-shaped object workpiece that has been ground using the present invention. FIG. 7 is a plan view showing an embodiment of the grinding device according to the present invention.

As shown in FIG. 7, the grinding device 1 has a machine body 2, and a table 3 is installed in the machine body 2 so as to be movable and driven in the horizontal direction of arrows A and B in the figure. It is being As shown in FIG. 1, a work holder 5 is provided on the table 3 so as to be swingable in the directions of arrows C and D via a support rod 7 with a semicircular cross section provided on the table 3. The work holder 5 has a main body 6, a drive cylinder 9, 10, etc. A work holding surface 6b is formed on the upper part of the main body 6, and a predetermined number of small diameter rod-shaped works 15, such as injection needles, are fixedly held on the work holding surface 6b. ing. Also,
At both left and right ends of the main body 6 in FIG. 1, there are connecting members 6c,
6d is attached at the same time, and the connecting member 6C16d has an arrow E in the vertical direction in the figure attached to the drive cylinder 9.10, respectively.
.

Rods 9a and 10a are supported so as to protrude and retract in the F direction.
is centrally located.

The machine body 2 is also provided with a spindle head 11, as shown in FIG. It is provided in such a way that it can be driven freely. Note that a soft grindstone is used as the grindstone 12 so that the small-diameter rod-shaped object work 15 is not burnt by grinding. Further, the grindstone 12 is driven by a drive unit 13.
By driving the drive unit 13, the grindstone 12 can be appropriately fed in the direction of the small-diameter rod-shaped object work 15, that is, in the direction of arrow F in FIG.

Since the grinding device 1 has one or more configurations, in order to grind a plurality of small-diameter rod-like workpieces 15, first, these small-diameter rod-like workpieces 15 are bundled to form a workpiece assembly 17.
The work assembly 17 is fixedly held on the work holding surface 6b of the work holder 5, as shown in FIG.

Next, in this state, the drive cylinder 9 fixed on the table 3 is driven to cause the rod 9a to protrude in the direction of arrow E, as shown in FIG. Then, the main body 6 of the work holder 5 moves around the support rod 7 in the direction of arrow C via the connecting member 6c.
direction by a predetermined angle θ1.

Note that, at this time, since the drive cylinder 10 is not being driven, the main body 6 swings smoothly in the C direction. When the main body 6 swings by a predetermined angle θ1 in the C direction, the workpiece holding surface 6b formed on the upper part is formed along the directions of arrows A and B while holding the workpiece assembly 17 fixedly. The table 3 is tilted at an angle θ1 with respect to the upper surface 3a of the table 3 in a downward-sloping manner to the right in FIG.

In this way, when the work holder 5, together with the work assembly 17, is tilted by the angle θ1, the table 3, together with the work holder 5, is moved a predetermined distance in the direction of arrow B from the previous standby position shown by the solid line in FIG. . Then, of the work assembly 17 fixedly held on the work holder 5 , the rightmost small-diameter rod-shaped object work 15 a in the figure is positioned at a position facing the grindstone 12 . In this state, the grindstone 12 is rotated in the direction of arrow C, and the drive unit 1 shown in FIG.
3, the grindstone 12 is sent toward the uppermost direction in FIG. 2 and brought into contact with the uppermost point in FIG. Detect the starting point Mol. Machining start point Mol
When is detected, the table 3 is retracted in the direction of the arrow A, and the grindstone 12 is rotated in the direction C and fed by a distance LL (see Fig. 6) from the machining start point Mol in the direction of the arrow F. Table 3, which was evacuated in
Together with the work holder 5, it is moved a predetermined distance in the direction of arrow B, which is the grinding direction. Then, each small diameter rod-shaped object work 1 fixedly held on the work holding surface 6b of the work holder 5
5 are laterally ground one after another by the grindstone 12. At this time, since the grindstone 12 is a soft grindstone, the amount of wear caused by grinding is large, and its diameter d gradually decreases. However, each small-diameter rod-shaped object workpiece 15 to be ground is moved by the work holder 5, which is tilted upward to the left in FIG. 2, so that the uppermost point UP in FIG. In order to compensate for the decrease in the diameter d of the grindstone 12 due to grinding, the grindstone 12 is positioned upward in the figure by a distance corresponding to the amount of decrease in the diameter d. For this reason, whetstone 1
Despite the wear and tear of 2, these small diameter rod-shaped objects work 1
5, as shown in FIGS. 3 and 6, the grinding wheel 12
As a result, a grinding groove 15E having a depth of Ll is formed.

Grinding groove 15E with depth Ll in each small diameter rod-shaped object work 15
When the rod 10a is formed, the drive of the drive cylinder 9 shown in FIG. 3 is stopped, and in this state, the drive cylinder 10 is driven to cause the rod 10a to protrude in the direction of the arrow E.

Then, as shown in FIG. 4, the work holder 5 swings around the support rod 7 by a predetermined angle (θl + 02) in the direction of the arrow via the connecting member 6d, so that the work holding surface 6b , together with the workpiece assembly 17, are tilted by an angle 02 with respect to the upper surface 3a of the table 3 in an upwardly rightward direction in the figure.

When the workpiece holding surface 6b is tilted by an angle θ2 with respect to the upper surface 3a, the grindstone 12 rotating in the C direction is fed by a predetermined amount in the direction of the arrow F in FIG. , a small diameter rod-shaped object workpiece 15b on the leftmost side in the figure.
The distance L2 (
(see FIG. 6) below in FIG. 6.

In this state, the table 3 together with the work holder 5 is moved by a predetermined distance in the direction indicated by the arrow in FIG. 4, which is the grinding direction. Then, each small-diameter rod-shaped object work 15 is ground one after another by the grindstone 12 from the small-diameter rod-shaped object work 15b. In this case, as described above, the grinding wheel 12 is gradually worn away as a result of grinding, and its diameter d gradually decreases.

However, each grinding groove 15E of the depth Ll formed in each side diameter rod-shaped object workpiece 15 to be ground is set based on the grinding groove 15E of the small-diameter rod-shaped object workpiece 15b by the work holder 5 which is oriented upward to the left in FIG. In order to compensate for the decrease in the diameter d of the grindstone 12, the grindstone 12 is gradually positioned upward in the figure by an amount corresponding to the decrease in the diameter d. For this reason,
Each grinding groove 15E of each small-diameter rod-shaped object 15 is formed by a grinding wheel 1.
2, each is further ground by a distance L2 (see FIG. 6).

In this way, each small-diameter rod-shaped object work 15 has a depth of L1+L.
When the grinding groove 15E of 2) is formed, the drive cylinder 10 shown in FIG. 5 is stopped, and the drive cylinder 9 is further driven to cause the rod 9a to protrude in the direction of arrow E. Then, the work holder 5 moves at a predetermined angle (θ1+02) in the C direction.
The workpiece holding surface 6b, together with the small diameter rod-shaped object workpiece 15, is tilted by an angle θ1 with respect to the upper surface 3a of the table 3 in a downward-sloping manner to the right in the figure (see the second part).

When the workpiece holding surface 6b is tilted by an angle θ1 with respect to the upper surface 3a, the grindstone 12 rotating in the C direction is fed by a predetermined amount in the direction of the arrow F, so that the lowest part of the outer peripheral surface 12a is
Distance L3 from the grinding groove 15E of depth L2 formed on the rightmost small-diameter rod-shaped workpiece 15a in FIG. 2 (see FIG. 6)
Position it so that it is located at the lower part of Figure 6. next,
In this state, the table 3 and the work holder 5 are moved by a predetermined distance in the direction of arrow B, which is the grinding direction. Then, as described above, despite the decrease in the diameter d of the grinding wheel 12 due to grinding, the grinding grooves 15E with a depth of L1+L2) formed on each small-diameter rod-shaped object workpiece 15 are further cut by the grinding wheel 12 by L3. As shown in FIG.
(=L1+L2+L3) grinding grooves 15E are formed.

(g) 0 Effects of the Invention As explained above, according to the invention of the grinding method of the present invention, the workpiece assembly 17 is polished by the amount corresponding to the amount of wear that occurs during one stroke of grinding of the grindstone 12. The grindstone 12 is tilted to compensate for the amount of wear, and the grinding groove 15E is ground by the grindstone 12 in this state. workpiece assembly 1 by an amount corresponding to the wear amount of
7 is positioned shifted in the direction of the grindstone 12 (direction of arrow E), so all of these small-diameter rod-shaped objects 12 and integrated work 15 can be ground by the same amount (LI L2, L3) with high processing accuracy. becomes possible.

Therefore, machining time can be shortened and machining efficiency can be improved.

Further, in the invention of the grinding device, the work holder 5
, the workpiece assembly 17 is in the grinding direction (direction of arrow A or B)
Since it is configured to be swingable so that it can be positioned in a tilted manner relative to Positioning can be performed in a shifted manner by a distance corresponding to the weight loss. Therefore, even if the amount of feed of the grindstone 12 is large at one time, all of these small-diameter rod-shaped workpieces 15 can be ground by the same amount (Ll, L2, L3) with good processing accuracy, and the processing time is reduced. It becomes possible to provide a grinding device 1 that can shorten the time and contribute to improving processing efficiency.

[Brief explanation of the drawing]

Figures 1 to 5 are process diagrams showing the process of grinding a small-diameter rod-shaped workpiece using the present invention, and Figure 6 is a process diagram showing the process of grinding a small-diameter bar-shaped workpiece using the present invention. FIG. 7 is a plan view showing an embodiment of the grinding device according to the present invention. 1...Grinding device 3...Table 5...Work holder 12...Whetstone 15.15a, 15b...Small diameter rod-shaped object work 15E----Grinding m groove 17---Workpiece assembly

Claims (2)

[Claims] (1) A grindstone is moved transversely to a workpiece assembly consisting of a plurality of small-diameter rod-like workpieces, and a grinding groove of a predetermined depth is formed on the surface of the small-diameter rod-like object workpiece. In the method for grinding a rod-shaped object workpiece, the workpiece assembly is tilted by an amount corresponding to the amount of wear that occurs during one stroke of grinding of the grindstone in a manner that compensates for the amount of wear, and in this state, the workpiece assembly is A method for grinding a small-diameter rod-shaped object workpiece configured to perform grinding processing of a grinding groove. (2) It has a work holder that can mount a workpiece assembly consisting of a freely rotatable grindstone and a plurality of small-diameter rod-shaped object works, and during grinding, the grindstone is moved relative to the workpiece collection. A grinding device that performs machining by rotating the grinding device, wherein the work holder is swingably provided so that the work assembly can be positioned at an angle with respect to the grinding direction of the grindstone.