JPH06132438A - Manufacture of tiebar punch - Google Patents

Abstract

PURPOSE:To enhance manufacturing efficiency of a punch by a method wherein the grinding and working operation of a required face, the formation of a comb tooth-shaped blade part by a rotary blade and the formation of an outer shape are performed continuously. CONSTITUTION:Only both the surface and the rear surface 1, 2 of a tungsten carbide sheet 1' which has been cut to a prescribed size are planar-ground and worked as a previous process. Then, the side on which a comb tooth-shaped blade part in the tungsten carbide sheet 1' is formed and the side opposite to it are cut 3', 4' by using a rotary blade, both side faces 3, 4 are formed, a size L in the lengthwise direction is set and a tiebar body 1 is formed. In addition, a long-side side-face part in the body 1 is cut 5' by using the rotary blade, and comb tooth-shaped blade parts 2 are formed at a prescribed pitch on the short-side side face 4 by using a cut face 5 as a reference. After that, the long-side side-face part in the body 1 is cut 6' by the rotary blade, a side face 6 is formed, and a tie-bar punch 3 is completed. All operations other than the grinding and working operation of a required face can be performed by the rotary blade, the operations can be performed continuously and the manufacturing efficiency of the tiebar punch can be increased remarkably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tie bar punch manufacturing method.

[0002]

2. Description of the Related Art A conventional tie bar punch manufacturing method is, for example, as shown in FIG. 9, cutting a tie bar punch main body a into a predetermined size from a cemented plate, and then cutting the upper surface, the lower surface, the side surface,
After finishing all the surfaces of ,, and with high precision by surface grinding, alignment is performed and a comb tooth-shaped blade portion b is formed on one side surface of the short side by a discharge wire cut or a profile grinder. . Further, as shown in FIG. 10, in the case where the grip portion of the tie bar punch body c has the convex portion d,
All eight surfaces including the upper surface and the rising step surface of the convex portion d are subjected to surface grinding to determine the external dimensions of the tie bar punch die in advance, and then the alignment is performed by performing alignment.
A comb-teeth-shaped blade portion e is formed on the side surface on the opposite side by a discharge wire cut or a profile grinder.

[0003]

According to the above-mentioned conventional tie bar punch manufacturing method, the entire surface of the tie bar punch main body is subjected to surface grinding to form it to a predetermined dimension with high accuracy, and to form a comb tooth-shaped blade portion. However, since the alignment is performed by an electric discharge wire cut or a profile grinder, the number of processing means and the number of steps are increased, and the work cannot be performed continuously, resulting in poor manufacturing efficiency. Further, since the comb-teeth-shaped blade portion is formed by a processing means different from that of the tie bar punch main body, there is a problem that a bending occurs due to a difference in processing strain particularly inside and outside the outer blade. The present invention has been made in view of such a conventional situation, and has a work efficiency by grinding the required surface, forming a comb tooth-shaped blade portion by a rotating blade, and dimensioning the outer shape, thereby improving the manufacturing efficiency. It is an object of the present invention to provide a method for manufacturing a tie bar punch in which the difference in processing strain does not occur in the comb tooth-shaped blade portion.

[0004]

As a means for technically solving this problem, the present invention manufactures a tie bar punch from a cemented carbide plate having a required thickness formed by polishing at least an upper surface and a lower surface. A method, which comprises a first step of cutting a side surface of a side on which a comb-tooth-shaped blade is formed with a rotary blade to adjust, a second step of cutting one side surface of a long side with a rotary blade, and cutting the side surface. The third step of forming the comb-teeth-shaped blade portions with a rotating blade at a predetermined pitch on the one side surface prepared in the first step with reference to the one side surface, and the other side surface of the long side being cut with the rotating blade The gist is a tie bar punch manufacturing method including the step 4). Further, the second step and the fourth step are simultaneously performed by the same rotary blade to manufacture a plurality of tie bar punches, and a protrusion is formed on the grip portion of the tie bar punch, and the protrusion is cut. The gist is that the process of performing is included.

[0005]

[Operation] Since all the processes except the grinding of the required surface can be performed by the rotating blade, the work can be continuously performed, and the production efficiency of the tie bar punch can be remarkably improved.

[0006]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an example of a manufacturing process of a tie bar punch having no convex portion. First, as a pre-process, only the upper and lower surfaces of a cemented carbide plate 1 ′ cut into a predetermined size as shown in (a) are surface-ground. To process.

Next, as shown in FIG. 1B, as a first step, the side where the comb-teeth-shaped blade portion of the cemented carbide plate 1 is formed by a rotary blade (FIG. 5) for performing comb-teeth processing and the opposite side thereof. Both side surfaces of the tie bar punch body 1 are cut at the same time that both side surfaces are cut, and the dimension L in the longitudinal direction is formed.
To form.

In the second step, as shown in FIG. 1 (c), one side surface of the tie bar punch body 1 on the long side is cut 'using the rotary blade, and then the third step is cut. The comb tooth-shaped blade portions 2 are formed at a predetermined pitch on the side surface on the short side with respect to the side surface.

Thereafter, a fourth step of forming the side surface by cutting the other side surface portion of the tie bar punch main body 1 on the long side of the tie bar punch body 1 with a rotary blade is performed, as shown in FIG. The tie bar punch 3 can be completed.

FIG. 2 shows a method of manufacturing a tie bar punch of two sheets, which uses a cemented carbide plate 11 'cut a little larger than two tie bar punches, and uses (a)-(a) of FIG.
By performing the step (c), the first tie bar punch 13 is formed from the tie bar punch main body 11. At this time, the side surface formation on the long side of the first tie bar punch 13 (fourth step) and the side surface formation on the long side of the second tie bar punch 14 (second step) are simultaneously performed by one cutting. Will be carried out. Therefore, the first tie bar punch 13
The second tie bar punch 14 can be formed by performing the formation of the comb tooth-shaped blade portion 12 and the cutting of the other side surface portion of the long side subsequently to the formation of the above. Furthermore, it is possible to perform arbitrary multi-pickup with three or more pieces by applying such a manufacturing process without being limited to two-piece picking.

FIG. 3 shows an example of a manufacturing process of a tie bar punch having a convex portion on the grip portion. First, as a pre-process, as shown in (a), the lower surface of the cemented carbide plate 21 '(the one without the convex portion 21'a). Plane) and the upper surface, and the side surface (including the side surface of the convex portion) on the shorter side of the convex portion 21′a, the step surface of the convex portion 21′a, and the upper surface of the convex portion 21′a. Grind.

Next, as shown in FIG. 3B, as a first step, the side surface portion on the short side forming the comb-teeth-shaped blade portion is cut 'with a rotary blade to adjust its end face and at the same time, the tie bar is adjusted. The punch main body 21 is dimensioned in the longitudinal direction. At this time, the cemented carbide plate 21 'is fixed with the convex portion 21'a facing downward.

Thereafter, the second step of cutting one side surface of the tie bar punch main body 21 on the long side as shown in FIG. 3C is performed using the rotary blade as in the above, and the cutting is continued. The third step of forming the comb tooth-shaped blade portions 22 on the side surface on the short side is performed at a predetermined pitch with reference to the side surface.

Further, a fourth step of cutting the other side surface portion of the tie bar punch main body 21 on the long side with a rotary blade is performed. However, in this case, the convex portion 2 of the tie bar punch main body 21
Since 1a is present, the side surface is not completely separated, and the convex portion 21a is in a grooved state as shown in FIG. 3C. The same applies to the case of cutting 'in the second step.

Therefore, the convex portion 2 of the tie bar punch main body 21
A step of completely cutting 1a is required, which is shown in FIG.
As shown in (d), after the fourth step, the tie bar punch body 2
1 is reversed and fixed so that the convex portion 21a faces upward, and a notch reaching from the upper surface side of the convex portion 21a to the groove formed in the fourth step by using a rotary blade thicker than the comb-shaped rotary blade It is performed by cutting "," at each depth. By this cutting process, the convex portion 21a
Both sides of the tie bar are cut off to complete a tie bar punch 23 as shown in FIG.

Incidentally, the convex portion 21a of the tie bar punch main body 21
If the rotating blade for machining the teeth can be completely cut without any problem in accuracy, the side surface grinding in FIG. 3 (a) is unnecessary, and the processing method itself in FIG. 1 can be applied. However, at this time, the side surface and the side surface are positioned with reference to the step surface.

FIG. 4 shows a two-piece tie bar punch manufacturing method, in which the steps shown in FIGS. 3 (a) and 3 (b) are performed by using a cemented carbide plate 31 'which is cut to a size slightly larger than two tie bar punches. After forming the tie bar punch main body 31 by performing
As shown in FIG. 4B, the grooving 32 and the comb-teeth-shaped blade portion 33 are alternately formed as shown in FIG.
By performing the cutting process of (d), the tie bar punch body 3
Both side portions of the convex portion 31a of FIG.
Two tie bar punches 34, 35 can be completed as shown in FIG. In this case as well, it is not limited to taking two sheets and it is also possible to take an arbitrary number of sheets with three or more sheets.

FIG. 5 shows an embodiment of cutting with the rotary blade. The tie bar punch main body 1 is fixed on the mounting table 4 by wax down or the like, and the rotary blade 5 is moved in the X direction to a predetermined position. The point can be cut.

FIG. 6 shows an example of processing a comb-tooth-shaped blade portion with a rotary blade. The tie bar punch main body 1 is fixed on a mounting table 4, and the rotary blade 5 is moved by a predetermined distance in the X direction. The rotary blade is subsequently moved in the Z direction to allow the rotary blade to escape. In this case, it can be easily performed by repeatedly performing the rotary blade while indexing the rotary blade at a constant pitch in the direction perpendicular to the paper surface. At this time, as shown in FIG. 7, if the side surface portion of the tie bar punch main body 1 on which the comb-teeth-shaped blade portion is to be formed is projected from the mounting table 4'and fixed, the mounting table 4'is not cut.

Further, as shown in FIG. 8, if the side surface portion of the tie bar punch body 1 where the comb-teeth-shaped blade portion is to be formed is fixed in an upwardly inclined state, the comb-teeth shape can be obtained simply by moving the rotary blade 5 in the X direction. The blade portion can be formed, and the work efficiency thereof can be significantly improved. In the first step, when the side on which the comb-teeth-shaped blade portion is formed is cut with a rotary blade, waste material is produced, but if it is difficult to remove only the waste material from the mounting table due to wax down, etc. The second step, the third step, and the fourth step may be performed. Also, when the gripping part has a convex part, the tie bar punch is divided by cutting the convex part side to the predetermined depth last with a thick rotary blade, but if necessary, the convex part is first cut to the predetermined depth. The groove may be formed in advance, and then the first to fourth steps may be performed.

[0021]

As described above, according to the present invention,
This is a method that can minimize the surface grinding process that was conventionally performed for dimensioning in the production of tie bar punches, and can perform dimensioning, side face formation and comb tooth-shaped blade portion formation using a rotating blade. Therefore, high-precision alignment between the tie bar punch main body and the rotating blade is required, and since the processing is performed by the same blade, no bending occurs due to a machining strain difference in the comb tooth-shaped blade portion, and The manufacturing process of the tie bar punch is simplified, the work is made continuous, and the manufacturing efficiency is improved, which is an excellent effect.

[Brief description of drawings]

1A to 1D are explanatory views showing an embodiment of the method of the present invention in the order of steps.

FIG. 2 is an explanatory diagram showing an example of taking two sheets in the order of steps.

3 (a) to (e) are explanatory views showing another embodiment of the method of the present invention in the order of steps, and (c ') to (c') are side views of (c) to (c), respectively. Is.

4 (a) to (d) are explanatory views showing an embodiment in which two sheets are taken, in order of steps, and (c ′) (d ′) is a side view of (c) and (d), respectively.

FIG. 5 is an explanatory diagram showing an example of cutting with a rotating blade.

FIG. 6 is an explanatory diagram showing an example of processing a comb tooth-shaped blade portion by a rotary blade.

FIG. 7 is an explanatory view showing an example of forming a comb tooth-shaped blade portion by projecting a side surface portion of the tie bar punch body.

FIG. 8 is an explanatory diagram showing another example of processing the comb-teeth-shaped blade portion by the rotating blade.

FIG. 9 is a perspective view showing a conventional example.

FIG. 10 is a perspective view showing another conventional example.

[Explanation of symbols]

1 ... Tie bar punch main body 1 '... Carbide plate 2 ... Comb-shaped blade part 3 ... Tie bar punch 4, 4' ... Mounting table
5 ... Rotating blade 11 ... Tie bar punch body 11 '... Carbide plate 12
… Comb-shaped blades 13, 14… Tie bar punch 21… Tie bar punch body 21 ′… Carbide plate 21
a, 21'a ... Convex portion 22 ... Comb tooth-shaped blade portion 23 ... Tie bar punch 31 ... Tie bar punch main body 31 '... Carbide plate 31
a ... convex portion 32 ... grooving 33 ... comb tooth-shaped blade portion 3
4, 35 ... Tie bar punch

Claims (3)

[Claims] 1. A method of manufacturing a tie bar punch from a cemented carbide plate having a required thickness formed by polishing at least an upper surface and a lower surface, wherein a side surface on a side where a comb tooth-shaped blade portion is formed is cut with a rotary blade. The first step for adjusting the length, the second step for cutting the one side surface on the long side by the rotary blade, and the one side prepared in the first step with the cut one side as a reference at a predetermined pitch. A tie bar punch manufacturing method comprising: a third step of forming a comb tooth-shaped blade portion with a rotating blade; and a fourth step of cutting the other side surface of the long side with a rotating blade. 2. The method for manufacturing a tie bar punch according to claim 1, wherein the second step and the fourth step are simultaneously performed by the same rotary blade to manufacture a plurality of tie bar punches. 3. The tie bar punch manufacturing method according to claim 1, wherein the tie bar punch has a convex portion formed on a holding portion, and a step of cutting the convex portion is included.