JP3710221B2 - Transfer press die set - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a die set of a transfer press that can perform setup change without changing a lower base and an upper base when a plurality of types of workpieces having different numbers of press forming processes are processed by a single transfer press. is there.
[0002]
[Prior art]
Conventionally, as shown in FIG. 6, a transfer press die set has a lower die attachment station (in FIG. 6, from 3ST to 3ST) with reference to positioning keys 103 provided at equal intervals on a lower base 102 fixed on a bolster 101. 7ST, the die holders 104 are detachably attached to each other, and the lower end of the upper base 106 fixed to the lower surface of the slide 105 that can move up and down is combed at equal intervals facing the positioning key 103. A punch holder 107 is detachably attached to an upper die attachment station (3ST to 7ST is shown in FIG. 6) using the blade-like groove 106a as an attachment reference.
Then, one die 108 and one punch 109 are attached concentrically and detachably to the die holder 104 and the punch holder 107, respectively, and the same number of steps as the pair of attachment stations on the lower side and the upper side (FIG. 6). Then, the die set of # 3 to # 7 is configured.
[0003]
In the conventional transfer press die set configured as described above, when a plurality of types of workpieces having different numbers of processes are formed by one transfer press, the lower platform 102 and the upper platform dedicated to the workpieces having different numbers of processes are used. Before the molding process for the workpiece having a different number of processes is started, the lower base 102 and the upper base 106 for the previous workpiece after the molding processing are removed from the transfer press, and the dedicated workpiece for the next workpiece is removed. The lower base 102 and the upper base 106 are attached to the transfer press, and the die set is assembled and adjusted.
[0004]
[Problems to be solved by the invention]
As described in the prior art, if multiple types of bases and upper bases dedicated to various workpieces with different numbers of processes are manufactured, the manufacturing costs are high, resulting in high costs. Therefore, there is a problem that a great amount of work time and labor are consumed, and the operation rate is lowered and the productivity is deteriorated.
[0005]
Furthermore, in the case of a conventional die set having the same number of mounting stations and the same number of processes, the distance between processes decreases as the number of processes increases, and accordingly, the mounting groove width L1 of the punch holder 107 and the distance L2 between the grooves 106a and 106a Therefore, the number of processes has a practical limit depending on the capacity (size) of the press machine. For this reason, if the number of processes exceeds the limit, the total number of processes will be distributed to two transfer presses and press molding will be required, and a mechanism for connecting will be required, so a huge amount of equipment will be required. There is a problem that the cost is high.
[0006]
The present invention has been made in view of such problems of the prior art, and the problem is that the number of steps can be changed to approximately 1.5 times without removing the lower base and the upper base from the transfer press. The manufacturing cost of the die set, lower base and upper base is saved, the work time and labor required for replacement are reduced, and the number of processes is increased beyond the practical limit due to insufficient rigidity of the upper mold mounting station (punch holder mounting part). It is intended to provide a transfer press die set that can.
[0007]
[Means for Solving the Problems]
The transfer press die set of the present invention has a lower base fixed on a bolster and having a plurality of lower die attachment stations on the upper surface at equal intervals, and is detachably attached to each lower die attachment station, and the die is detachably attached. A lower die set comprising a die holder, an upper base fixed to the lower surface of a vertically movable slide and having upper die mounting stations at equal intervals facing the lower die mounting station at the lower end, and the die holder at the upper die mounting station In a die set of a transfer press comprising an upper die set comprising a punch holder that is detachably mounted opposite to the punch and is detachably attached to the punch, the first lower die attachment station to the nth lower die attachment station of the lower base Of the die holders of each lower die mounting station, either even or odd. A lower die set in which two dies are attached so that the die intervals of all the steps are equal, and the number of steps is approximately 1.5 times the number of die attachment stations, and the first upper die attachment station of the upper base To n-th upper die mounting station, each of even-numbered and odd-numbered upper die mounting stations has two punches opposed to the two dies, and the punch intervals in all the steps are equal. And an upper die set in which the number of steps is approximately 1.5 times the number of mold mounting stations , and the die holder and the punch holder can be connected to the die without changing the lower base and the upper base. It is possible to change the number of processes to about 1.5 times by replacing the one with one punch and one with two dies and two punches .
[0008]
According to the above-described transfer press die set, either the even-numbered or odd-numbered one of the mold mounting stations from the first mold mounting station to the nth mold mounting station provided facing the lower base and the upper base, respectively. The pair of upper and lower die holders and punch holders attached to each mold attachment station can be replaced with one that can attach one die and one punch and one that can attach two dies and two punches. , For a die and punch that can be attached one each (that is, since the number of processes can be increased by about 1.5 times the number of stations, each time the transfer press changes to a workpiece with a different number of processes, It is no longer necessary to remove the lower base and the upper base and attach the lower base and the upper base corresponding to the new workpiece, reducing the work time and labor required for the setup change and producing. But improved, it can be saved Shimodai Metropolitan elevator production costs.
In addition, since the number of processes can be increased by making the even and odd numbered mold mounting stations of the lower base and the upper base into two processes, it becomes possible to increase the number of processes more than the practical limit, A die set having the number of steps equal to or larger than the capacity (size) of the transfer press can be realized.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a transfer press die set according to the present invention will be described with reference to the drawings based on the embodiments.
FIG. 1 is a front view of a die set having an increased number of processes attached to a transfer press, in which a die, a punch, a knockout and a stripper are omitted, and FIG. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 shows the fourth process (# 4) to the tenth process in the third mold mounting station (3ST) to the seventh mold mounting station (7ST) of the die set having an increased number of processes which has been cut at the workpiece feed center line. FIG. 5 is an enlarged cross-sectional view showing (# 10), and FIG. 5 is a third process from the third mold mounting station (3ST) to the seventh mold mounting station (7ST) of the die set having the normal process number specification cut in the same direction as FIG. It is an expanded sectional view showing from # 3 to the 7th process (# 7).
[0010]
In FIG. 1, a slide 2 is mounted so as to be movable up and down along vertical guides 1a and 1b provided on both inner sides of legs 1A and 1B of a frame 1 of a transfer press. The upper surface 1 c is cut in a plane parallel to the lower surface 2 a of the slide 2. The slide 2 is moved up and down by two gate cams (not shown) and two sets of upper and lower cam rollers (not shown), the lower base 3 of the lower die set is fixed to the upper surface 1c of the bolster 1C, and the upper base 4 of the upper die set is the slide 2 The lower surface 2a is fixed to the lower table 3 so as to be opposed thereto.
[0011]
2 and 3, the guide post 5 is fitted near the both ends in the longitudinal direction so as to protrude vertically and downward, and the lower end of the guide post 5 is inserted into the concentric hole 3a of the lower base 3. It is inserted in the center hole of the guide bush 6 press-fitted so as to be movable in the axial direction.
[0012]
On the upper surface of the lower base 3, 17 lower mold attachment stations are set in order from the first station (1ST) to the nth station in the present example in the work feeding direction to the 17th station (17ST) at equal intervals. A positioning key 7 is fixed to all the mold mounting stations (2ST to 17ST) except the first mold mounting station (1ST) for the left end punching (or punching), and the die holders 8A and 8B described later are attached. By engaging the guide groove 8a formed on the lower surface with the positioning key 7, the position in the workpiece feeding direction (left and right in FIGS. 1 and 2) is determined, and as shown in FIG. The position of the front-rear direction is determined by screwing positioning bolts 10a to the piece 10 fixed to the front end surface, and then the die holders 8A and 8B are screwed to the lower base 3 by bolts.
[0013]
When the die set of 25 steps (# 1 to # 25) is constituted by the lower base 3 having the 17 lower mold mounting stations described above, even-numbered mold mounting stations (hereinafter simply referred to as even numbers) as shown in FIG. (4ST, 6ST in FIG. 4) attached to the die holder 8A and the die holder 8B attached to the odd-numbered (hereinafter simply referred to as odd) mold mounting station (3ST, 5ST, 7ST in FIG. 4). The die holder 8B of the odd number mold mounting station has one die mounting hole 8b, and the die holder 8A of the even number mold mounting station has two die mounting holes 8b. The holes 8b are arranged at equal intervals on the workpiece feed center line.
[0014]
The die holders 8A and 8B have knockout through holes 8c concentric with the die attachment holes 8b. The lower base 3 has through holes 3b communicating with the through holes 8c. 8b is detachably fitted with a hole-shaped die 9 adapted to the molding process of each step, and knockout pins are inserted into the through holes 3b and 8c in the odd mold mounting station and the through holes 3c and 8c in the even mold mounting station. 11 is inserted so that it can move up and down.
In addition, the through hole 3b drilled at the center position of an even number of die attachment stations is a through hole when forming a 17-step die set.
[0015]
The upper end portion of the knockout pin 11 is cut to a shape that can be inserted into the hole of each die 9, and the lower end portion is a through-hole in an odd number of mold mounting stations of the spring support plate 12 fixed to the lower surface of the bolster 1 </ b> C of the frame 1. 12a and an even number of mold attachment stations project through the through hole 12b and protrude downward, and are always urged upward by a spring 15 stretched between the upper collar 13 and the spring receiving plate 12. The upper position is regulated by the lower retaining collar 14.
The through hole 12a drilled at the center position of an even number of mold mounting stations is a through hole when forming a 17-step die set.
[0016]
On the other hand, the upper base 4 of the upper die set is also provided with 17 upper mold attachment stations (1ST to 17ST) at equal intervals so as to face the lower mold attachment station. Are engraved at regular intervals in the shape of a comb blade. And when the die set of 25 processes (# 1- # 25) is comprised with the upper stand 4 which has 17 upper mold | type attachment stations, it is a cross section in odd number upper mold attachment stations (3ST, 5ST, 7ST in FIG. 4). A punch holder 16B having a rectangular shank portion 16a is fitted so as to be vertically adjustable, and is fixed by tightening an inclined clamp plate 17 indicated by a virtual line in FIG. 4 with bolts 17a after the vertical position adjustment. A punch holder 16A having a shape different from that of the punch holder 16B is similarly fitted in the groove 4a of the even upper die mounting station (4ST and 6ST in FIG. 4) so that the position can be adjusted in the vertical direction. It is fixed.
[0017]
The punch holder 16B of the odd upper mold mounting station has a stepped punch mounting hole 16b vertically penetrating in the center, and a tip-shaped punch 18B suitable for the process is detachably fitted into the punch mounting hole 16b. The upper and lower positions of the punch holder 16B and the punch 18B are adjusted by bringing the lower end surface of the adjustment screw 19 inserted perpendicularly to each upper mold attachment station position of the upper base 4 into contact with the upper end surface of the punch 18B. In addition to adjustment, an upward force applied during press molding is received by the adjustment screw 19. Reference numeral 20 denotes a fixing screw for fixing the adjusting screw 19.
Further, a stripper 23B having a hole 23a that freely fits in the punch 18B is provided adjacent to the lower end surface of the punch holder 16B of the odd-numbered die mounting station (3ST, 5ST, 7ST in FIG. 4) so as to be movable up and down. The stripper 23B is moved up and down via a lever 24 and pins 25 and 25 by a driving mechanism (not shown).
[0018]
As shown in FIG. 4, the punch holder 16A attached to an even upper mold mounting station (4ST and 6ST in FIG. 4) has a flange at the lower end and a square-shaped holder section 16c is the odd mold mounting. The width is smaller than the holder portion 16a of the punch holder 16B at the station position, and is fitted to the comb-shaped groove 4a through the liners 26A and 26B so that the position can be adjusted up and down, similarly to the punch holder 16B. It is fixed by a clamp plate 17. Two punch mounting holes 16d of the punch holder 16A are arranged on the workpiece feed center line so as to vertically penetrate the flange portion, and punches 18A shorter than the punch 18B can be attached to and detached from the punch mounting holes 16d, respectively. The adjacent punches 18B and the punches 18A, 18A are all arranged at equal intervals. The upper ends of the two punches 18A, 18A are in contact with the lower end of either the liner 26A or 26B, and the upper ends of the liners 26A, 26B are in contact with the lower end of the adjustment screw 19 of the upper base 4 via the contact plate 27. It touches.
[0019]
Therefore, the vertical position of the two punches 18A, 18A that are detachably attached to the punch holder 16A is determined by adjusting the vertical position of one of the punches 18A with the adjusting screw 19 of the upper base 4, and the other punch 18A. Is determined by the dimensional difference between the liners 26A and 26B in the vertical direction.
The strippers 23A and 23A for the two punches 18A and 18A at even-numbered die mounting stations (4ST and 6ST in FIG. 4) are fixed to the upper surface of the corresponding die holder 8A via a support.
[0020]
The above is an example in which a die set of 25 steps (# 1 to # 25), which is approximately 1.5 times, is assembled on the lower base 3 and the upper base 4 having 17 mold mounting stations (1ST to 17ST). Since the process (# 1) is often a blanking process (or a drawing process), the die holder 8A and the punch holder 16A that are attached to an even number of die mounting stations (4ST and 6ST in FIG. 4) are used for two processes. However, if the first step (# 1) is not a punching (or drawing) step, an odd number of mold attachment stations (3ST, 5ST, 7ST in FIG. 4) may be used for two steps.
[0021]
Next, the transfer press mechanism will be briefly described.
As shown in FIGS. 1 and 2, the transfer slides 31 and 31 are placed on guide surfaces provided at both ends in the longitudinal direction of the lower base 3 so as to be swingable in the work feeding direction, and are fixed to the left side of the frame 1. A swing base 34 is swingably provided along the two guide bars 33 33 in the workpiece feed direction on the bracket 32, and the left end of the transfer slides 31, 31 is connected to the right end of the swing base 34. Has been.
[0022]
A vertical shaft 35 is rotatably inserted into a vertical hole formed in the central portion of the bracket 32, and two cam followers 37, 37 that are in contact with a drive cam 36 that is keyed to the vertical shaft 35 are provided. The drive cam 36 is rotated 360 ° by one reciprocation of the slide 2 and the transfer slide 31 is reciprocally swung by one reciprocation.
Fingers (not shown) for gripping a workpiece are attached to the transfer slides 31 and 31 so as to face each other at equal intervals in the number of steps, and the swinging width (transfer pitch) of the transfer slides 31 and 31 varies depending on the number of machining steps. Since it is necessary, the drive cam 36 has a split structure.
[0023]
Subsequently, a case where a die set having one die and a punch for each die attachment station, that is, a die set having the same number of steps as the conventional one having the same number of steps as the number of die attachment stations is configured. Briefly described.
In FIG. 5, the die holder 38 attached to the position of the lower die mounting station on the lower base 3 via the positioning key 7 has the same outer shape regardless of whether it is an even number or an odd number, and adapts to the processing contents of each process. A die mounting hole 38b and a hole for punch insertion are formed. The through holes 3c for the two knockout pins respectively drilled on both sides of the even number mold mounting stations (4ST and 6ST in FIG. 5) of the lower base 3 and the through holes of the spring receiving plate 12 concentric with the through holes 3c 12b is a play.
[0024]
On the other hand, the punch holders 16B that are detachably attached to the grooves 4a of the lower die attachment station at the lower end of the upper base 4 are all used in odd-numbered die attachment stations in FIG. 4 (3ST, 5ST, 7ST in FIG. 4). The same shape can be used. Further, the stripper 23 can be of the same shape as the stripper 23B used in the odd-numbered die mounting stations in FIG. 4 (3ST, 5ST, 7ST in FIG. 4) regardless of whether the stripper 23 is even or odd.
[0025]
Therefore, for example, in order to replace the 17-step die set shown in FIG. 5 with the 25-step die set shown in FIG. 4, two punches 18A are basically attached to the punch holders 16B of at least an even number of die mounting stations. The die holder 38 is replaced with a die holder 8A capable of mounting two dies 9 for even-numbered mounting stations and a die holder 8B for odd-numbered mounting stations, and the stripper 23 of the even-numbered mounting stations is replaced. 23A and 23A can be replaced, so that the specification can be easily changed from 17 steps shown in FIG. 5 to about 1.5 times the number of steps without replacing the lower base 3 and the upper base 4 on the machine.
[0026]
That is, in the case of the present embodiment, the press working in the 17th step and the 25th step can be selected without replacing (sharing) the lower base 3 and the upper base 4.
[0027]
【The invention's effect】
Since the die set of the transfer press of the present invention is configured as described above, the following effects can be obtained. For even-numbered or odd-numbered mold mounting stations among the mold mounting stations from the first mold mounting station to the n-th mold mounting station provided facing the lower base of the lower die set and the upper base of the upper die set, respectively. a pair of upper and lower die holder and the punch holder is attached, and the die and punch capable respective one attachment, die and punch in the replaceable to and capable each two attachment, the number of steps Since the number of mold mounting stations can be increased by approximately 1.5 times, when processing multiple types of workpieces with different numbers of processes with one transfer press, the lower and upper bases are connected to the machine as before. This eliminates the need to remove the base and upper base for new workpieces, saves on manufacturing costs for the lower base and upper base, and is effective in reducing costs. Work time and effort that is reduced and productivity is improved.
[0028]
In addition, since the number of processes is increased by using even and odd numbered mold mounting stations on the lower and upper bases as two processes, the number of processes more than the number of processes that has been regarded as a practical limit due to insufficient rigidity of the mounting part has been hitherto. This makes it possible to realize a die set having a number of processes exceeding the capacity (size) of the transfer press.
[Brief description of the drawings]
FIG. 1 is a front view of a die set with an increased number of processes attached to a transfer press, in which a die, a punch, a knockout, and a stripper are omitted.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
3 is a cross-sectional view taken along the line B-B in FIG. 2;
FIG. 4 is an enlarged cross-sectional view showing the fourth to tenth steps of a die set having an increased number of steps and having a workpiece feed center line cut right away.
5 is an enlarged cross-sectional view showing a third step to a seventh step of a die set having a normal process number specification cut in the same direction as FIG. 4; FIG.
FIG. 6 is a partial cutaway view of a prior art die set.
[Explanation of symbols]
1 Frame 1C Bolster 2 Slide 3 Lower base 4 Upper base 7 Positioning key 8A Die holder for even mold mounting station 8B Die holder for odd mold mounting station 9 Die 11 Knockout pin 12 Spring receiving plate 16A Punch holder 16B for even mold mounting station Odd number Die holder for mold mounting station 17 Clamp plate 18A Punch for even mold mounting station 18B Punch for odd mold mounting station 19 Adjustment screw 23A Stripper for even mold mounting station 23B Stripper for odd mold mounting station 26A, 26B Liner 31 Transfer Slide 34 Swing base 35 Vertical shaft 36 Drive cam 38 Die holder for even / odd mold mounting station

Claims (1)

A lower die set consisting of a lower base fixed on the bolster and having a plurality of lower die attachment stations on the upper surface at equal intervals; a die holder detachably attached to each lower die attachment station and detachably attached to the die; An upper base fixed to the lower surface of the movable slide and having an upper mold mounting station at the lower end facing the lower mold mounting station at equal intervals, and detachably attached to the upper mold mounting station facing the die holder. In a transfer press die set comprising an upper die set comprising a punch holder for detachably attaching a punch, either the even number or the odd number among the first lower die attachment station to the nth lower die attachment station of the lower base 2 dies each in the die holder of each lower die mounting station of the same die spacing in all processes A lower die set in which the number of steps is approximately 1.5 times the number of mold mounting stations, and the even number or odd number of the first upper mold mounting station to the nth upper mold mounting station of the upper base. The two punches are attached to the punch holders of each of the upper die attachment stations so as to face the two dies and the punch intervals of all the steps are equal, and the number of steps is equal to the number of die attachment stations. An upper die set approximately 1.5 times larger , the die holder and the punch holder can be attached without replacing the lower base and the upper base , one die and one punch can be attached, A transfer press die set characterized in that the number of processes can be changed to approximately 1.5 times by replacing the punches with ones that can be attached two times.

Images