JP3704033B2 - Work feed amount adjustment device for transfer slide - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer slide device of a transfer press machine, and more specifically, in the transfer device, a first transfer mechanism that reciprocates at a distance between reference steps and a second transfer mechanism that can reciprocate on the first transfer mechanism. The present invention relates to a feed amount adjusting device in a transfer device that changes a moving end position of a finger attached to a finger and adjusts a distance between the finger and a finger in the next process.
[0002]
[Prior art]
Japanese Patent Laid-Open No. 53-45781 is known as a method for changing the movement amount of one finger in a transfer device. This is a workpiece position where one of the multiple fingers provided on the transfer bar is provided so as to be able to advance and retreat in the direction perpendicular to the transfer direction, and is always urged by a spring in the protruding direction so that it can be gripped during the transfer stroke. The workpiece is moved by the remaining stroke by moving the finger at the same time as passing through the cam by the cam fixed correspondingly to the cam.
[0003]
[Problems to be solved by the invention]
In the above prior art, the workpiece transfer can be performed even when the workpiece transfer amount is not an integral multiple of the prescribed transfer stroke of the transfer device. That is, it is possible to add a short transfer stroke without changing this stroke during the transfer of the specified transfer stroke. However, it is not possible to put a product transferred with a long transfer stroke on the reference stroke. The present invention increases the die width when blanking a large number of strips at the same time, and increases the die when the workpiece material to be blanked is large, so as to avoid interference with the next die. The distance between the position and the processing position of the next process is larger than the distance between the reference processes in the subsequent process. Therefore, an object of the present invention is to provide an apparatus that adjusts the work feed amount of at least one finger in step 1 so that the workpiece can be transferred at a distance between subsequent reference steps. Also, when processing two products at the same time by transfer press, the blanking pitch dimension must be matched to the inter-process dimension of the mold, and the work feed amount adjusting device has improved the problem that the material yield is deteriorated Is to provide.
[0004]
[Means for Solving the Problems]
  In order to solve the above problems, the invention of claim 1The workpiece feed amount adjusting device in the transfer slide of the B line and the A line in one step, with the first row, the second row as the B line, the third row, the fourth row as the A line, among the four rows of the strip material Two processing lines are blanked from the strip material in Step 1 by forming two processing lines in series by processing two workpieces blanked for each odd or even row in one step. In a transfer device of a press machine that sequentially transfers the workpieces to the next machining step and deforms two workpieces in each machining step,
A transfer base provided so as to be reciprocally movable in a transfer direction from a transfer cam rotating synchronously with the vertical movement of the ram through a cam follower;
B line process on the lower platform of the press machine connected to the transfer substrate 1 A first transfer bar that reciprocates a reference inter-process distance P after step 2 and after step 2 of the A line, and A on the side farther from step 2 of the two workpieces of step 1 provided in the first transfer bar so as to be openable and closable. A first transfer mechanism comprising a plurality of first fingers each having an interval of P / 2 that grips a workpiece of each processing line excluding a workpiece of the line;
A second transfer bar that is supported by a linear guide so as to be slidable on a rail projecting from the first transfer bar; and a distance longer than the reference inter-process distance P provided to be openable and closable on the second transfer bar. And a second finger for gripping the A-line workpiece on the side farther from the step 2 of the workpiece in the step 1 at the two blanking positions determined by the workpiece diameter D and the arrangement, and moving the second finger in the transfer direction. The transfer base and the second transfer mechanism provided on the first transfer bar so as to be independently reciprocally movable.
While the first transfer mechanism transfers the workpiece to the next step by the first transfer mechanism, the second finger holding the A-line workpiece far from step 2 in step 1 is advanced by the second transfer mechanism. The distance to the first finger in the next process is adjusted to the reference process distance P.
In the workpiece feed amount adjusting device in the transfer slide according to claim 2, the distance between the odd rows or the even rows of the blanking position determined by the diameter D and the arrangement of the workpieces is 2 · cos 30 ° · (D + t), The distance by which the second finger that holds the A-line workpiece on the side farther from the step 2 of the step 1 is added by the second transfer mechanism is 2 · cos 30 ° · (D + t) −P / 2.
[0005]
According to invention of Claim 1, the 2nd transfer apparatus which operate | moves independently on the 1st transfer apparatus is provided, and the process between process 1 and process 2 is set to the distance P between the reference processes between processes after process 2. The difference p between the distance and this P is added to the second transfer device during operation of the first transfer device, and the workpiece is transferred to a position where it can be transferred at the distance between the reference steps. The distance between the steps can be shortened without being constrained by the distance between the steps 1 and 2, and the die set can be made compact.
[0007]
    Also,In series2A processing line from a wide strip with a row processing lineTwo rowsThe yield of the material is improved because the double workpiece can be efficiently removed. That is, from the strip in step 12When blanking a single workpiece simultaneously, step 11 ofSince the individual fingers can be advanced and adjusted to the distance between the reference processes, the optimum material can be taken according to the blank diameter irrespective of the distance between the reference processes after the process 2, and the optimum yield is obtained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a plan view of the transfer device according to the first embodiment, FIG. 2 shows a part of the transfer device as viewed from the arrow A, FIG. 3 shows a drive pneumatic circuit of the second transfer mechanism, and FIG. The position will be described with reference to FIG. 4 showing a cross section taken along the line CC in FIG. 1 and FIG. 5 showing a cross section taken along the line BB in FIG.
[0011]
In the transfer device incorporated in the known transfer press, first, with respect to the first transfer mechanism, the mounting table 2 is fastened to the side surface of the bolster 1, and the brackets 3A and 3B are established on the front rear side in the transfer direction. Two guide rods 4 and 4 are supported and fixed. Two sliders 6A and 6B are slidably guided across the guide rods 4 and 4 on the front and rear sides. The sliders 6A and 6B are connected by a connecting plate 7 to form a transfer base. Yes. Between the two guide rods 4, 4, the drive shaft 8 penetrates in the vertical direction through the connecting plate 7 and the mounting table 2.
[0012]
The drive shaft 8 is rotatably supported by a press machine base and is connected to rotate in synchronization with the vertical movement of the ram. The drive shaft 8 is keyed with a disc cam 9 for reciprocally moving the finger of the transfer device by a reference process distance P at the machining position, and the cam is rotated integrally. Cam followers 11A and 11B arranged to sandwich the disc cam 9 180 degrees apart from each other on the connecting plate 7 are pivotally supported by pins 12A and 12B. Therefore, the transfer base is reciprocated faithfully by the cam lift amount by the rotation of the disc cam 9.
[0013]
A mounting plate 13 is fastened with a bolt to the front end of the connecting plate 7 of the transfer base, and this mounting plate 13 can be moved in the transfer direction on the lower base 14 placed on the bolster 1 of the press machine. Two parallel first transfer bars 16A and 16B extending in the transfer direction on both sides of the position are attached. The first transfer bar 16A, 16B is provided with a finger corresponding to the processing position of each process.
[0014]
The finger will be described in the state of FIG. 1 in which the first transfer bar has advanced.
In the embodiment, a plurality of steps for machining two pieces in each one step are provided, and one workpiece is machined by two lines, that is, one of A line and B line. The inter-process reference distance of each line is P, and the finger moving distance is P. Since the two A and B lines are formed on one line, the fingers of the A line and the B line are alternately arranged at intervals of P / 2.
[0015]
The fingers 17A1; 17B1, 17A2; 17B2, 17A3; 17B3, 17A4; 17B4,... Are arranged as a pair on the first transfer bars 16A, 16B so as to correspond to the processing position of P / 2. The fingers are provided with the gripping surfaces 17Aa and 17Ba (FIGS. 1 and 5) facing the first transfer bars 16A and 16B, respectively, and the fingers 17A1 pass through the first transfer bar 16A and the cover 19A. The finger 17B1 is also pivotally supported by a pin 18B penetrating the first transfer bar 16B and the cover 19B and is rotatable. The fingers 17A1 and 17B1 are always urged by the springs 21 in the direction in which the fingers are closed. The same applies to the other fingers.
[0016]
Next, with respect to the second transfer mechanism, a stand 22A is established on the front side of the transfer base on the connecting plate 7 and a stand 22B on the angle bracket 25 attached to the rear surface of the slider 6B to which the connecting plate 7 is fastened. The two parallel support rods 23A and 23B slidably penetrate the stands 22A and 22B and protrude forward and backward with the drive shaft 8 interposed therebetween. Both ends of the support rods 23A and 23B are coupled to a rectangular frame by connecting pieces 24A and 24B. Both ends of the front connecting piece 24A are L-shaped, and second transfer bars 26A and 26B are fastened in parallel to each L-shaped horizontal portion by bolts. The second transfer bars 26A and 26B are slidably supported by linear guides 28A and 28B on the rails 27A and 27B protruding from the first transfer bars 16A and 16B. A pair of fingers 17A0 and 17B0 having the same structure as the above-described fingers are always urged at the tips of the second transfer bars 26A and 26B by springs in the closing direction.
[0017]
An air actuator 29 is attached to the bisector of the two support rods 23A and 23B on the angle bracket 25 attached to the rear surface of the slider 6B of the transfer base. The piston rod 29a is integrally connected to the connecting piece 24B at the tip. In FIG. 3 showing the operation circuit of the air actuator 29, the flow path 68 passes through a valve 61, a filter 62, a pressure regulator 63 with a pressure gauge, and a lubricator 64 from a pressure air supply source, and a flow path 69 passes through a two-position electromagnetic switching valve 65. Further, it is connected to the front chamber 29 b of the air actuator 29 via a flow rate adjusting valve 66 with a check valve. On the other hand, the flow path 71 is connected to the two-position electromagnetic switching valve 65 from the rear chamber 29c of the air actuator 29 via the flow rate adjusting valve 67 with a check valve. Exhaust gas from the two-position electromagnetic switching valve 65 is discharged to the atmosphere through silencers 72 and 73, respectively. In this embodiment, the flow control valve 66 with check valve is adjusted in throttle so that the second transfer bars 26A and 26B can move forward between the crank angles of 80 degrees. In addition, the flow rate adjusting valve 67 with a check valve is also adjusted in throttle so that the movement in the reverse process becomes a crank angle of 80 degrees.
[0018]
Next, the relationship between the punch and the die in the blanking process of process 1 and the work holding mechanism of the empty process of process 2 will be described with reference to FIG.
[0019]
To the die holder 31 provided on the lower base 14, blanking dies 32A and 32B are fastened with bolts at odd spacings of odd rows of four rows to be described later for blanking two simultaneously. In addition, constricting dies 33A and 33B for concentrating the first time are fixed to the lower sides of the extraction dies 32A and 32B, respectively. A hole that is slightly larger than the aperture holes of the aperture dies 33 </ b> A and 33 </ b> B penetrates the die holder 31. Semicircular canisters 34A and 34B are guided to the through hole positions on the lower surface of the die holder 31 so as to be movable between the cantilevering position and the retracted position in the direction perpendicular to the paper surface by cannering guides 36A and 36B. The wiping 34A, 34B is in the retracted position in the ram lowering process, and is moved forward and backward in synchronization with the ram so as to be advanced to the wiping position at the bottom dead center. The strip W for punching out the workpiece material is fed out on the die dies 32 </ b> A and 32 </ b> B in the direction perpendicular to the paper surface, and the strip guide plate 37 is attached on the die holder 31. The guide plate 37 has a window through which the punching punch 4 passes and has a guide width that allows the strip to meander.
[0020]
On the other hand, an upper base 42 is attached to a press slide that is moved up and down by a ram (not shown), and punch holders 43A and 43B are fixed concentrically with the punching dies 32A and 32B by bolts (not shown). The hollow cylindrical punching punches 44A and 44B are concentrically attached to the punch holders 43A and 43B, respectively, and their upper ends are in contact with the bottoms of the punch polders 43A and 43B and are fixed by keys. Punch shafts 47A and 47B are slidably inserted in the center holes of the respective punches 44A and 44B through bushes 46A and 46B.
[0021]
Further, adjustment screws 48A and 48B for adjusting the punch punch position are screwed onto the upper base 42, and the lower ends thereof are in contact with the upper surfaces of the punch polders 43A and 43B. The adjusting screws 48A and 48B support the punch shafts 47A and 47B via bushes 49A and 49B so that the punch shafts 47A and 47B can move up and down with the bushes 46A and 46B. The drawing punches 51A and 51B are fastened to the lower ends of the punch shafts 47A and 47B by bolts, and are accommodated in a state of being immersed in the center holes of the punching punches 44A and 44B at the upper moving end position. In this embodiment, step 2 is a blanking step in order to avoid interference because the diameter of the blanking die that is performed at two positions in step 1 is large.
[0022]
In the A-line and B-line machining positions in the empty process of process 2, operating shafts 81A and 81B that are vertically moved by cams that are rotated in synchronization with the vertical movement of a ram (not shown) are inserted into the through holes formed in the lower base 14. It is inserted. Finger opening cylinders 82A and 82B are attached to the upper end of the shaft. The finger opening cylinders 82A and 82B open the fingers 17A0, 17B0, 17A1 and 17B1 of the workpieces W1A and W1B held at the transfer ends of the fingers, and are provided with recesses 82Aa and 82Ba for receiving. Further, pressers 83A and 83B that are in contact with the bottom surfaces of the workpieces W1A and W1B and are clamped by the abutting plates 86 attached to the bottom surface of the die holder 31 are provided at the center so as to be movable up and down by defining rising ends. It is always biased upward by a spring 84 inserted between the upper ends of the operating shafts 81A and 81B. With this configuration, the work is temporarily retained in the empty process 2.
[0023]
Next, the relationship between the punch and the die in the third and subsequent drawing steps will be described with reference to FIG. An aperture die 55 is accommodated and fixed at a processing position of the lower base 14. A knockout 56 is provided through the lower base 14 in a through hole concentric with the die hole of the drawing die 55, and is always positioned at the same position as the upper surface of the die 55 by a spring (not shown). On the other hand, a punch 57 for deep drawing is disposed concentrically with the die 55 on the punch holder provided on the upper base 42. Further, a spreader 58 is slidably mounted on the punch 57. As the punch 57 descends, the spreader 58 descends and comes into contact with the fingers 17A3 and 17B3 to spread and spread the flat surfaces 17Aa and 17Ba of the fingers to release the workpiece. The workpiece squeezed by the lowering of the punch is squeezed out with the upper surface of the knockout 56 coming into contact with the lower surface of the workpiece and sandwiched by the punch 57, and the workpiece that has been wiped off by the lower surface of the spreader 58 as the punch rises. Push up to the transfer line.
[0024]
The configuration of the first transfer mechanism, the second transfer mechanism, the punch, and the die of the transfer device has been described above. Next, the interval between the blanking step 1 and the step 2 in the processing example shown in FIG. 6 will be described. Consider a case where four rows of workpieces are economically blanked from the strip W. In consideration of the material accumulation, in order to punch two blanks in one process for two lines A and B, theoretically, as shown in FIG. 6, for the third, fourth, and B lines for the A line In total, four rows, the first row and the second row, are punched in parallel. The right side of the figure is the first row, and even lines 2 and 4 are shifted from the odd lines (1, 3) by 1/2 the workpiece diameter D in the feed direction and cos 30 ° · D in the width direction. The position is shifted to In the implementation, the width t is set between the workpieces so that the strips are connected after blank punching.
[0025]
    For this reason, a strip feeding apparatus (not shown) has a structure that moves as follows. That is, in FIG. 6a, the workpieces 1 and 1 are punched out at the blanking position. This interval is 2 · cos 30 ° · (D + t). Next, in FIG. 6b, the strip W is fed from the position a by cos 30 ° · (D + t) in the direction B and (D + t) / 2 in the direction B, and the workpiece is 2 at the blanking position. 2 is punched as 2 (FIG. 4 shows this state). In FIG. 6C, the strip W is fed cos 30 ° · (D + t) in the direction C from the position b.D(D + t) / 2 is sent in the direction, and the workpiece is punched as 3 and 3 at the blanking position. Feed control is a, b, c,DThe movement is repeated in synchronization with the ram.
[0026]
Thus, when the diameter and arrangement of the workpieces are determined, the blanking position is determined, and the gripping position of the corresponding finger is determined. That is, in FIG. 6C, the first, second and second rows of workpieces 1, 2 and 3 having a diameter D and the two rows and three rows of workpieces 1, 3 and 2 having a diameter D form an equilateral triangle, respectively. The blanking position interval is 2 · cos 30 ° · (D + t) because it has the tapping allowance t. Since the interval between steps 2, 3, 4... Is P, the transfer stroke of the first transfer mechanism is P. Since there are two machining positions in one process, that is, a machining position at 1 / 2P, the fingers for gripping the machined work are arranged at an interval of P / 2.
[0027]
However, the fingers 17A0 and 17B0 of the second transfer mechanism for gripping the workpiece at the blanking position in step 1 must be separated from the fingers 17A1 and 17B1 of the first transfer mechanism by 2 · cos 30 ° · (D + t). When the workpiece is transferred to the process 2, the fingers 17A0 and 17B0 of the second transfer device need extra movement to transfer the workpiece 1A to the predetermined position of the process 2, and the movement is performed by operating the air actuator 29. A movement amount of cos 30 °, (D + t) −P / 2 = p is added.
[0028]
The present invention having the above-described configuration is first shown in FIG. 7 showing timing diagrams of the ram, the first transfer bar, and the second transfer bar, and FIG. 1, FIG. 3, FIG. 8, and FIG. This will be described from the state that the workpiece is blanked and first-time squeezed.
[0029]
The crank angle when the ram is positioned at the descending end (bottom dead center) is set to 0 degree. At the bottom dead center of the ram with a crank angle of 0 degrees, the blank is punched from the strip material W by the punching punches 44A and 44B, and this material is first drawn by the drawing punches 51A and 51B to form the workpieces W1A and W1B. (FIG. 9). Further, the fingers 17A1 and 17B1 of the first transfer mechanism are in a state of being expanded by the work W1B located at the lower end during the retreat, and similarly, the fingers 17A0 and 17B0 of the second transfer mechanism are located at the lower end during the retreat. It is in a state of being pushed and spread by the workpiece W1A.
[0030]
When the cam is stopped at the bottom dead center, the can wipers 34A and 34B advance from the retracted position (perpendicular to the paper surface) and abut against the drawing punches 51A and 51B. As the ram rises due to the rotation of the cam, the workpieces W1A and W1B, which have started to fit as the squeezing punches 51A and 51B rise, are paid out by the canteens 34A and 34B. At a crank angle of 30 degrees, the second transfer bars 26A and 26B reach the retracted end, and the fingers 17A0 and 17B0 completely grip the workpiece W1A. Further, the first transfer bars 16A and 16B reach the retracted end at the position of the crank angle of 35 degrees, and the fingers 17A1 and 17B1 completely grip the work W1B (FIG. 8).
[0031]
The first transfer bars 16A and 16B stop for 90 degrees from the position of the crank rotation angle of 35 degrees, and the second transfer bars 26A and 26B stop for 100 degrees from the position of 30 degrees. While the ram continues to rise, the first transfer bars 16A and 16B start moving forward from the position of the crank angle of 125 degrees by the rotation of the disc cam 9, and the fingers 17A1 and 17B1 move while gripping the workpiece W1B. The second transfer bars 26A and 26B are moved to the position when the two-position electromagnetic switching valve 65 is operated at a crank angle of 130 degrees, from the pressure air source through the flow paths 68 and 71, and the flow rate adjusting valve 67 with a check valve. 29 is supplied to the rear chamber 29c, and the piston rod 29a is protruded and advanced. Since the pressure air in the front chamber 29b is throttled by the flow path adjustment valve and discharged from the flow path 69 to the atmosphere via the silencer 72, the forward speed of the second transfer bar is controlled.
[0032]
At a crank angle of 160 degrees, the ram reaches the rising end, stops at the top dead center for 20 degrees, and begins to descend at 180 degrees. In the first transfer bars 16A and 16B, the workpiece W1B gripped by the fingers 17A1 and 17B1 with respect to the forward end at a crank angle of 215 degrees is moved by the reference inter-process distance P and reaches the position 1B of the B machining line in the process 2. That is, the position 1B of the process line B in FIG. 1 is changed from the position 1B of process 1 in FIG.
[0033]
On the other hand, the second transfer bars 26A and 26B reach the forward end at 210 degrees. The fingers 17A0 and 17B0 holding the workpiece W1A are provided on the first transfer base and the first transfer bars 16A and 16B, and are moved forward independently of each other. Since the stroke of the piston rod 29a of the actuator 29 is regulated to 2 · cos 30 ° · (D + t) −P / 2, the sum P + p of the movement amount P of the first transfer bar is moved, and the finger 17A0 is moved. , 17B0, the workpiece W1A reaches the position of 1A on the A processing line in step 2. That is, the position 1A of the processing line A in step 2 in FIG. 1 is changed from the position 1A in step 1 in FIG.
[0034]
When the workpieces W1A and W1B reach the positions of the A and B lines in step 2, the operating shafts 81A and 81B are lifted by cams (not shown) synchronized with the rams, and the pressing elements 83A and 83B respectively move the bottom surfaces of the workpieces W1A and W1B. The workpiece is clamped by the pressing plate 86. Thereafter, the finger opening cylinders 82A and 82B spread the fingers 17A0, 17B0, 17A1 and 17B1 and hold the work in the recesses 82Aa and 82Ba.
[0035]
While the ram is at the top dead center, the strip W is moved from position a in FIG. 6 to the position b in FIG. The ram starts to descend from a crank angle of 180 degrees, and the punching punches 44A, 44B punch the workpiece material from the strip W in cooperation with the punching dies 32A, 32B. The punched workpiece material is pushed down by the punching punches 44A and 44B and the drawing punches 51A and 51B, and the next workpiece is drawn for the first time by the cooperation of the drawing punches 51A and 51B and the drawing dies 33A and 33B. The ram reaches the falling edge at 340 degrees.
[0036]
At an angle of 305 degrees before the ram reaches the descending end, the first transfer bars 16A, 16B begin to retreat by the rotation of the disc cam 9, and when the fingers 17A1, 17B1 that have been spread away from the finger opening cylinder 82B, springs are released. 21 closes fingers 17A1 and 17B1 and retracts. Further, at the angle of 310 degrees, the two-position electromagnetic switching valve 65 is switched to the E position, and pressure air is supplied to the front chamber 29b of the air actuator 29 from the pressure air source through the two-position electromagnetic switching valve 65 and the flow path 69, and the rear chamber 29c. Then, the second transfer bars 26A, 26B start to retreat and the fingers 17A0, 17B0 move away from the finger opening cylinder 82A and close by the spring 21 to retreat.
[0037]
At a crank angle of 340 degrees, the ram becomes a descending end, the workpiece is punched from the strip with a punching punch, and the workpiece is retracted to the workpiece fitted to the drawing punches 51A and 51B that have stopped after the first drawing with the drawing punch. The fingers 17A1 and 17B1 of the first transfer bar and the fingers 17A0 and 17B0 of the second transfer bar are in contact with each other and forcedly spread. At the end of this one cycle, the workpiece of the previous machining is transferred to step 2, and the first drawing of the blanking of the next workpiece is completed. By continuing this cycle, the workpiece is sequentially transferred to steps 3, 4, 5,.
[0038]
The deep drawing after step 2 is as shown in FIG. That is, the workpieces W3A and W3B drawn in the intermediate process 3 and held by the fingers 17A3 and 17B3 are similarly transferred in the latter half of the ram raising process, and when the ram is lowered, the drawing punches 57 and 57 and the drawing die 55, The workpieces W3A and W3B are deep-drawn in cooperation with 55, and the spreader 58 opens the fingers 17A3 and 17B3.
[0039]
[Example 2]
A plan view of the first transfer mechanism and the second transfer mechanism will be described with reference to FIG. 10 showing a state in which the workpiece in step 1 is transferred to the next step, and FIG. 11 showing a state in which the workpiece in step 1 is held. Example 2 is an example in which one process is performed in one step, and the other points are the same except that a single line is formed. Therefore, in order to divide the A and B lines, the same parts are indicated by adding the numbers after the numbers A and B added to the numbers, and the description thereof will be omitted.
[0041]
【The invention's effect】
Since it is as above-mentioned, this invention has the following effects.. CraftIf a double row workpiece material is punched from the strip at the same time in step 1, the material supply width (width region) will inevitably increase, and if the workpiece becomes larger, the blank diameter will increase and the blanking die will also support this. Become bigger. For this reason, the inter-process distance between the process 1 and the process 2 becomes longer than the reference inter-process distance, and the second transfer mechanism is provided on the first transfer mechanism so that the work in the process 1 is moved independently. Since adjustment was made by the amount of movement of the fingers to be gripped, the distance between processes after the next process could be shortened to improve the unity of the machine configuration, and in particular, the die set could be made compact.
[0042]
  1Because it consists of multiple processing lines in the process, EngineeringSince the amount of movement of the finger gripping the workpiece of about 1 can be adjusted, the optimum material removal according to the blank diameter can be performed regardless of the distance between the reference processes, and the yield of the material is improved, which contributes to cost reduction.
[Brief description of the drawings]
FIG. 1 is a plan view of a first transfer mechanism and a second transfer mechanism of a transfer apparatus, showing the forward positions of the mechanisms.
FIG. 2 is a view of the transfer mechanism of FIG.
FIG. 3 is an air actuator drive circuit diagram of a second transfer mechanism.
4 is a cross-sectional view taken along the line CC in FIG. 1. FIG.
5 is a cross-sectional view taken along line BB in FIG.
FIG. 6 is a diagram showing a process of blanking A and B line workpiece materials from a strip.
FIG. 7 is an operation timing chart of the ram, the first transfer bar, and the second transfer bar.
FIG. 8 is a plan view of the first transfer mechanism and the second transfer mechanism, showing the retracted positions of the mechanisms.
FIG. 9 is a view showing a descending end position of the punching and drawing punches in step 1;
FIG. 10 is a plan view of the first transfer mechanism and the second transfer mechanism according to the second embodiment and illustrates the forward positions of the mechanisms.
FIG. 11 is a diagram similarly showing a retracted position.
[Explanation of symbols]
1 Bolster
4 guide bar
7 Connecting plate
8 Drive shaft
9 disc cam
11A, 11B Cam Follower
14 Lower platform
16A, 16B 1st transfer bar
17A0, 17B0, 17A1, 17B1 ... Finger
22A, 22B Stand
23A, 23B Support rod
24A, 24B connecting piece
26A, 26B Second transfer bar
29 Air Actuator
31 Die holder
32A, 32B die without die
33A, 33B, 55 Diaphragm die
34A, 34B
42 upper base
44A, 44B Punching punch
47A, 47B Punch shaft
51A, 51B, 57 Diaphragm punch
56 Knockout
65 2-position solenoid valve
66, 67 Flow control valve with check valve

Claims (2)

Of the four strips of strips, 1 row, 2 rows are B lines, 3 rows, 4 rows are A lines, and blanking is performed for each odd row or even row of B and A lines in one step. A machining process for machining two workpieces in one step is provided in series to form two serial machining lines, and the two workpieces blanked from the strip material in step 1 are sequentially transferred to the next machining step. In a transfer device of a press machine that performs deformation processing on two workpieces in each processing step,
A transfer base provided so as to be reciprocally movable in a transfer direction from a transfer cam rotating synchronously with the vertical movement of the ram through a cam follower;
A first transfer bar that is connected to the transfer base and reciprocates a reference inter-process distance P after step 1 of the B line and after step 2 of the A line on the lower platform of the press machine, and can be opened and closed to the first transfer bar. A first transfer mechanism comprising a plurality of first fingers each having a spacing of P / 2 for gripping a workpiece on each processing line excluding an A-line workpiece on the side farther from step 2 of the two workpieces in step 1; ,
A second transfer bar that is supported by a linear guide so as to be slidable on a rail projecting from the first transfer bar; and a distance longer than the reference inter-process distance P provided to be openable and closable on the second transfer bar. And a second finger for gripping the A-line workpiece on the side farther from the step 2 of the workpiece in the step 1 at the two blanking positions determined by the workpiece diameter D and the arrangement, and moving the second finger in the transfer direction. The transfer base and the second transfer mechanism provided on the first transfer bar so as to be independently reciprocally movable.
While the first transfer mechanism transfers the workpiece to the next step by the first transfer mechanism, the second finger holding the A-line workpiece far from step 2 in step 1 is advanced by the second transfer mechanism. A workpiece feed amount adjusting device in a transfer slide , wherein the distance between the first finger in the next process is adjusted to the reference inter-process distance P. The distance between the odd-numbered rows or even-numbered rows at the blanking position determined by the workpiece diameter D and the arrangement is 2 · cos 30 ° · (D + t), and the side farther from the step 2 in the step 1 by the second transfer mechanism 2. The work feed in the transfer slide according to claim 1, wherein a distance to which the second finger holding the A-line work is advanced and added is 2 · cos 30 ° · (D + t) −P / 2. Quantity adjustment device.

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