GB2124933A - Stamping and pressing production line - Google Patents

Abstract

Two or more components to be assembled into an article, such as a stud or rivet, are produced by stamping and pressing in respective dies 1, 2 on the same press bed and are transferred at 3,4 to an assembling press 5 which is also mounted on the same bed. The components may pass through stamping and pressing dies more than once before assembly. The transfer means are screw conveyors. <IMAGE>

Description

SPECIFICATION Stamping and pressing techniques Stamping and pressing techniques represent one of the most popular production and processing methods. The application of these techniques not only achieves a high mass production capacity but also meets the requirement for accuracy. These are the strong points of stamping and pressing techniques.

Stamping and pressing techniques can be divided into the following five varieties in accordance with the nature of processing: 1. Shearing, 2. Banding, 3. Lengthening, 4. Forming, and 5. Cubic lengthening and compressing.

This invention relates to a stamping and pressing method of directly combining products of shearing, banding, lengthening or forming etc, operating on one and the same stamping bed or pressing bed.

In conventional stamping and pressing processes, due to differences in requirements, some stampings could be directly used together with other components, but others have had first of all to be jointly stamped and pressed prior to being used together with other components. This invention further relates to the latter stampings; in particular to the technical measure of jointly stamping and pressing two or more stampings or the separate components which must be further processed.

According to the conventional technical measure of combination stamping and pressing, each part must be separately stamped, pressed or formed on the stamping bed or pressing bed of each press machine, then transferred to the stamping bed or pressing bed of another press machine which can exclusively operate stamping and pressing. Since there is confusion between separately stamped, pressed or formed parts which have not yet been combination stamped or pressed, it is necessary first of all to arrange the materials, then send them into the processing plant in accordance with the fixed direction in order to finish the combination stamping and pressing engineering.But, because the speed of such an arrangement is limited, or due to the limitation of forms of the materials, even if speed of separate stamping and pressing were very fast, speed of combination stamping and pressing would be controlled by the "limitation" of material arrangement. Thus, it has not been possible to increase the speed of production. In addition, the conventional technical measure requires a lot of equipment. For example, when n units combination stamping and pressing of separately stamped and pressed materials are to be finished, use must be made of n + 1 sets of stamping beds or pressing beds.

Objects of the present invention are to obviate or mitigate the problems of the conventional technical measure and also to provide a novel technical measure for stamping and pressing to increase the speed of output for combination stamping and pressing.

According to the present invention, I provide a method of combination stamping and pressing of a set of two or more product components to be combined, stamped and pressed, comprising setting the stamping-pressing dies of the set of two or more product components on one and the same stamping bed or pressing bed for stamping and pressing on each occasion the two or more product components simultaneously, transferring the set of two or more product components through a transferring device adapted to the shape of the stamping-pressing product sets and reduced in speed relative to the stamping and pressing procedure, and carrying the two or more product components, under the control of the shape and the direction in the transferring process, into a combination stamping-pressing device rotating at the identical speed, the combining, stamping and pressing being carried out at the same time or in steps.

This invention enables the collection of the aforesaid separate materials on one and the same stamping bed or pressing bed to simultaneously stamp, press or form them, and the transfer of the separately stamped or pressed materials into the combination stamping and processing engineering plant with special feeding equipment in accordance with a fixed direction to finish the engineering of combination stamping and pressing.

Moreover, since separately stamped and formed materials can be transferred into the combination stamping and pressing engineering plant in accordance with a fixed direction, it is unnecessary to arrange the materials. Furthermore, regardless of separate stamping, pressing and forming or combination stamping and pressing finishing can be effected on one and the same set of stamping beds or pressing beds synchronously and jointly, it being unnecessary to use n + 1 sets of stamping beds or pressing beds as mentioned above and a lot of equipment for finishing of combination stamping and pressing engineering.This invention also enables the technical bottlenecks of conventional processing engineering to be overcome, the output per unit time to be considerably increased, and the effect in the stamping and pressing process with one set of stamping beds or pressure beds, to be as high as if n + 1 sets were used; the speed of output can be increased considerably, a lot of equipment and human power can be dispensed with, and each piece of equipment can operate with the highest efficiency.

An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a sectional view of a pin hook; Figure 2 is a sectional view of a pin cap; Figure 3 is a sectional view of a pin body; Figure 4 is a side view of driving equipment of a carrying device for the pin cap and the pin body; Figure 5 is a sectional view of driving equipment of combination stamping and pressing; Figure 6 is a plan view showing a pin cap stamping die la a pin body stamping die 2, a pin cap carrying device 3, a pin body carrying device 4, and combination stamping and pressing equipment etc., at their relative positions on one and the same bed; Figure 7 is a sectional view taken along the line 1-1 of Figure 6; Figure 8 is a sectional view taken along the line 2-2 of Figure 6;; Figure 9 is a sectional view taken along the line 3-3 of Figure 6; Figure 10 is a plan view showing a blank in a step in the production of pin caps; Figure 11 is a sectional view taken along the line 4-4 of Figure 10; Figure 12 is a sectional view taken along the line 7-7 of Figure 13 showing the arrangement of the pin cap die; Figure 13 is a sectional view taken along the line 5-5 of Figure 12; Figure 14 is a sectional view taken along line 6-6 of Figure 12, showing the process of rotating the pin cap; Figure 15 is a sectional view showing the process of rotating the pin cap; Figure 16 is a sectional view showing the first step in transferring the pin cap into the transferring screw.

Figure 17 is a top view of Figure 18; Figure 18 is a front view of Figure 16; Figure 19 is a sectional view showing the second step in transferring the pin cap into the transferring screw; Figure 20 is a top view of Figure 21; Figure 21 is a front view of Figure 19; Figure 22 is a perspective view showing the relative positions of the transferring shaft, push plate and the transferring screw; Figure 23 is a plan view showing the procedure of producing pin bodies from a blank; Figure 24 is a sectional view taken along the line 8-8 of Figure 23; Figure 25 is a sectional view taken along the line 10-10 of Figure 26 showing the plane surface of the pin body die; Figure 26 is a sectional view taken along the line 9-9 of Figure 25; Figure 27 is a sectional view taken along the line 11-11 of Figure 25, showing the first step in the cutting of the pin body.

Figure 28 is a sectional view showing the second step in the cutting of the pin body; Figure 29 is a sectional view showing the first step in the transferring of the pin body into the transferring screw.

Figure 30 is a sectional view showing the second step in the transferring of the pin body into the transferring screw; Figure 31 is a sectional view showing the third step in the transferring of the pin body into the transferring screw; Figure 32 is a sectional view taken along the line 12-12 of Figure 31; Figure 33 is a sectional view taken along the line 16-16 of Figure 40; Figure 34 is a plan view showing the mixed gears equipment in the pin cap transferring device; Figure 35 is a sectional view taken along the line 13-13 of Figure 34; Figure 36 is a sectional view taken along the line 14-14 of Figure 34, showing the shape of the guide oblique groove; Figure 37 is a plan view showing the mixed gears equipment in the pin body transferring device; Figure 38 is a sectional view taken along the line 15-15 of Figure 37;; Figure 39 is a sectional view taken along the line 18-18 of Figure 37, showing the shape of the guide oblique groove; Figure 40 is a broken sectional view showing the combination stamping-pressing device; Figure 41 is another broken sectional view also showing the combination stamping-pressing device; Figure 42 is a complete developed view taken along line 17-17 of Figure 40, showing the procedure of combining, stamping and pressing the pin cap and the pin body; Figure 43 is a complete development view showing the next process of combining, stamping and pressing the pin cap and pin body.

Referring to Figure 1, in order to incarnately describe the present invention, let us take the pin hook 8 (mostly used for women's handbag hook, rucksack's connection hook and cowboy pant's decoration hook etc.) shown in the processing drawing as the example.

As shown in Figure 1, pin hook 8 will be combination formed by pin cap 9 of Figure 2 and pin body 10 of Figure 3.

Now, let us describe from the process of separate stamping and pressing cap 9 and pin body 10 to completion of pin hook 8, and additionally explain each large part for completion of aforesaid expected engineering.

As shown in Figure 6, each large part consists of: Pin cap stamping die 1 for stamping pin cap 9, Pin body stamping die 2 for stamping pin body 10, Pin cap 9 carrying device 3, Pin body 10 carrying device 4, Combination stamping and pressing device 5 (as shown in Figure 5), Driving equipment 6 for driving of pin cap carrying device and pin body carrying device, and Driving equipment 7 for driving of combination stamping and pressing device.

Now, let us briefly describe the functions and their relative positions in the drawings, and then describe in detail the structure of each large part as follows: 1. Brief introduction of each part Please refer to Figures 4, 5 and 6, Figure 6 is a plan view showing where the operator must stand and what he sees from above.

The references 1 and 2 denote segments respectively showing dies of pin cap 9 and pin body 10,3 is the pin cap carrying device to be used to carry the pin cap 9 stamped and formed by pin cap stamping die (refer to Figure 2) and send it into the combination stamping equipment 5.4 is the pin body to be used to carry the pin body 10 stamped and formed to the pin body stamping die 2 (refer to Figure 3) and send it into the combination stamping and pressing equipment Sto combination stamp and press it. 5 is the combination stamping and pressing equipment.

The pin cap 9 (as shown in Figure 2) and the pin body 10 (as shown in Figure 3) will be separately carried into the combination stamping and pressing equipment 5 and, by the continuous rotation of the combination stamping and pressing die arranged like a disc, will be combination stamped and pressed one by one.

Figure 4 is a side view showing the left side of the stamping bed and 7 is a driving equipment for the combination and pressing equipment 5.

Figure 5 is a sectional view in-between two holders of the stamping bed. 6 is a driving equipment for the pin cap driving equipment 3 and the pin body carrying equipment 4 (refer to Figure 6).

The driving equipment in Figure 4 will first be described and includes a centre shaft 12 of a pressing bed shaft, and taking advantage of the operation by gears 13, 14 and 15, it can transmit the motive power from the centre shaft 12 to a driving shaft 16 in an orderly manner. At the same time, a bevel gear 17 is fitted to the centre shaft 12 to drive a vertically-centred bevel gear 18, taking advantage of its driving action. Taking advantage of the operation of a universal joint 19, the bevel gear 17 can also transmit the motive power from the centre shaft 12 to a positive gear 22 through a driving lever 20 and a universal joint 21.Finally, taking advantage of the engagement with the positive gear 22 as well as the transmission by a positive gear 23 fitted on the centre shaft of combination stamping and pressing equipment, it can drive the combination stamping and pressing equipment.

The driving equipment for the pin cap carrying device and the pin body carrying device will next be described, and, as shown in Figure 5, a bevel gear 24 is fitted on the driving shaft 16 which indirectly receives the transmission from the centre shaft 12.

Motive power from the bevel gear 23 will be transmitted to a vertically-centred bevel gear 25, then to a universal joint 26 and a driving lever 27, and finally from a universal joint 28 to a driving shaft 29.

As shown in Figure 6, a bevel gear 30 fitted on the driving shaft 29 (also refer to Figure 5) will finally drive a bevel gear 31 (as shown in Figure 6 & Figure 9).

As also shown in Figure 6 a screw 55 for transferring the pin cap and pin body will rotate clockwise in accordance with the direction of arrows 81 and 82.

As shown in Figure 9, after receiving motive power from the centre shaft of the stamping bed, the universal joint 28 will transmit the power to a driving shaft 106 through the driving shaft 29 and two rotating bevel gears 30 and 31, then taking advantage of direct driving by transferring screw 88, will rotate in accordance with the direction of the arrow 82, and finally will rotate the driving shaft 143 through the positive gear 108 on the driving shaft 106 (refer to Figure 6 & Figure 8) and the locked gear 107.

As shown in Figure 7, there is fitted to the end of the aforesaid driving shaft 143 a bevel gear 109 which can transmit the motive power in an orderly manner through the bevel gear 110, the driving shaft 111,the bevel gears 112,113 and the driving shaft 114 (refer to Figure 7), then through the gear 115 on the driving shaft (refer to Figure 8), make the transferring shafts 53 and 55 rotate in opposite directions to each other, and finally drive, by steps, the gear wheel 116 of the transferring screws and the gear 117 of the transferring shaft 53 to rotate the transferring shaft 55 in accordance with the direction of the arrow 81 to overturn the upwardly-open and just cut pin cap into the downwardly-open condition and send it into the screw groove of the transferring screw 55.

The pin cap stamping die and its transferring process: Figures 10 and 11 show the stamping and pressing stages of the blanks for pin caps 9 as shown in Figure 2.

Reference is made to Figures 10, 11, 12 and 13 in order to describe more clearly the processing steps for the pin cap. In Figures 12 and 13,37 is the upper die shoe, 38 is the stripper plate and 39 is the lower die shoe. The engineering contents of each processing step is as follows: The first step is side cutting and setting.

Side cutting and setting engineering can be finished with the side cutting punch 33 as shown in Figure 12 and 13.

The second step is the step of stamping arcuate sectors of a circle: Can be finished with the side cutting punch 40.

The third, fourth, fifth, sixth and seventh steps are blank steps.

The eighth step is that of cutting, stamping and forming the blanks 36.

The six empty holes 44 (refer to Figure 10) diagonally placed in the first row are those from which the blanks 36 have been cut the empty holes occurring simultaneously after simultaneous cutting of the blanks. Reference is made to Figures 12 and 13 in which the blanks are correctly guided by the sleeve pipe 46 and forming die 47 while the stamping punch 45 effects stamping, the pin cap being pinched by the stripping claw 49 which functions like a spring 50, and the pin cap dropping down into the transferring shaft 53 having the annular notch 52.

This being the case, as shown in Figure 14, the transferring pin 54 projecting into the notch 52 will drop in a clockwise direction down into the pin cap 9 located in the notch 52 and transfer the pin cap 9 to the space between the transferring screw 55 and a pushing plate 56 fitted at the upper side of the transferring screw 55 (as shown in Figure 15) and the opening of the pin cap 9 is now already turned downwards by rotation of the transferring shaft 53 and the transferring pin 54.

As shown in Figures 16, 17 and 18, when the pin cap 9 is initially placed into the screw 55 by the transferring pin, it will be located centrally of the pitch of the screw, and, when the pin cap is fully located in the space between the push plate 56 and the screw 55 by the transferring pin 54, as shown in Figures 19,20 and 21, the screw thread will come near to the pin cap 9, and this being the case, the transferring pin 54 will pass over the notch in between the push plate 56 through the upper side of the pin cap 9 and subsequently transfer the next pin cap 9. As shown in Figure 22, when the push plate 56 has just entered into the notch 52 of the transferring shaft 53, the notch of the push plate 56 will provide the passage for the transferring pin 54.

The pin cap 9 which has been transferred into the screw 55 will be further transferred to the combination stamping and pressing equipment 5 along the edge of the push plate 56 in the direction of rotation of the screw 55 by the rotating and transferring functions of the screw 55. As shown in Figure 16-21, when the pin cap 9 has been passed into the screw 55, there is enough space to contain the pin cap in the notch of the screw 55 although the screw 55 is continuously rotating, and therefore, there is no possibility of breaking or piling of the pin cap 9. The process of transferring the pin cap 9 from the transferring screw to the combination stamping and pressing equipment 5 will be explained in detail hereinafter.

Stamping die of the pin body and its transferring process.

Figures 23 and 24 show the arrangement of the material pieces 57. In order to more clearly understand the stripper plate reference should be had to Figure 25 and 26 also. 58 is the upper die shoe, 59 is the stripper plate and 60 is the lower die shoe. The engineering content of each step is as follows: The first step is side cutting and setting (refer simultaneously to Figures 25 and 26) which can be finished with the stamping punch 61.

The second, third, fourth, fifth and sixth steps are blank steps.

The seventh step is the first drawing. This can be accomplished with the punch 65, the drawing hole 83, the lifter pin 118 and the spring 119.

The eighth step is the first setting. This can be accomplished with the spring 67, the punch 66, the setting hole 87, the pin 120 and the spring 121.

The ninth step is the second drawing. This can be accomplished with the punch 68, the lifter pin 122 and the spring 123.

The tenth step is the second setting. This can be accomplished with the punch 69, the spring 70, the lifter pin 124 and the spring 125.

The eleventh step is the third drawing. The extension can be continued with the punch 71 equipped with the taper 72 and of diameter less than that of the punch 68, the lifter pin 126 and the spring 127.

The twelfth step is the fourth drawing. With this the extension, which is not yet finished by the eleventh step can be further continued with the punch 73 equipped with the taper 74 and of diameter less than that of the punch 91, the lifter pin 128 and the spring 129.

The thirteenth step is a blank step.

The fourteenth step is that of clearing the hole.

This can be accomplished finished with the spring 77, the punch 75 and the pin 76 of the punch 75.

The fifteenth, sixteenth and seventeenth steps are blank steps.

The eighteenth step is that of stamp-cutting the pin body.

As shown in Figures 26,27 and 28, the pin body 10 will be stamp-cut by the punch 79 first (as shown in Figure 27) which will be further pinched by the pin 84 and the stripping claws 85 and 86 (as shown in Figure 28).

Figure 29 shows that, when the pin body 10 approaches the chute 147, it drops down into the tip of the groove of the screws 88. As shown in Figure 30, when the pin body 10 is pressed and passed into the chute 147 by the pin 84 (refer to Figure 32), and because the screw 88 can momentarily rotate a little, it can let the pin body 10 drop down into about the middle part of the screw groove, and as shown in Figure 31, when the pin 84 has risen until it is fully free from the pin body 10, the thread 161 of the screw 88 momentarily approaches the pin body 10, and, because the screw 88 can continuously rotate at its position, it can pass the pin body 10 in the direction of combination stamping and pressing equipment alongside the groove 147.

On each occasion that the upper die shoe shuts, the six punches 79, in a consecutive series, and the pin 84 situated at the upper part of the pertaining shaft axis centre will cut and push the pin body 10 into the chute 147 situated at the upper part of the screw 88, and the screw 88 will continuously send the pin body 10 into the direction of the combination stamping and pressing equipment. Therefore, the punch 79 and the pin 84 will be dropped every time that the upper die shoe shuts; in other words, six pin bodies 10 will be stamped and cut at the same time.

Consequently, when the screw 88 starts to send the pin body which has just been stamped and cut, it must rotate through six revolutions and send away six pin bodies 10 before the next shutting of the upper die shoe, and must also let the next pin body 10, which will be stamped and cut in next shutting of the upper die shoe, follow the last pin body which is stamped and cut in the current shutting of the upper die shoe. It is also necessary not to let the pin bodies 10, which will be passed on by every pitch of the screw 88, stop or pile on one another.

In addition, in order to prevent the pin 84 being struck by the screw 80 before the pin 84 is fully raised during the continuous rotation of the screw 80, as shown in Figures 29 and 30, it is necessary to reserve enough space in each of the pitches to facilitate the aforesaid operation.

Transferring equipment of the pin cap and the pin body.

As shown in Figures 6,33,40 and 41, the central prop 148 of the stamping and pressing equipment 5 is stationary about its axis, i.e. it does not rotate, and on the sixteenth gear 150 being sent up by the slide block 149, the punch 96 and the six guide posts 151 can rotate clockwise around the prop 148. This leads to the counterclockwise rotation of the mixed gears 89 and 102 through the gear 150 and the combination punch 96, and, through the transferring claws separately sent up by the mixed gears 89 and 102, the pin cap and the pin body are transferred at the ends of the screws 55 and 88 into the combination die of the combination stamping and pressing equipment 5 to be subjected to an engineering stage of combination stamping and pressing.

Referring now to Figures 34,35 and 36, a mixed gear 89 on the pin cap transferring disc 90 can rotate counterclockwise around the centre of the transfer ring disc 90 and consists of three troughs flanked by curved lines 91 alternating with three troughs flanked by pin wheel curved lines 92. As shown in Figure 33, because the pin wheel curved line 92 is geared and driven by the punch 96, and the gear curved line 91 by the gear wheel 150, transmission between the pushing equipment 9 and the mixed gear 89 will be made by the alternation of the pin wheel and the gear wheel.In the meantime, transmission between the gearwheel 150 and the gearwheel curved line 90 will be used for supplementation of the discontinuous transmission in only those three sets made up of punch 96 and the pin wheel curved lines 92 on the circumference, and facilitation of the continuous transmission in between the same.

Referring again to Figure 34, the conveyer claw 93 is connected to the lower part of the mixed gear 89 and can rotate coaxially therewith. This conveyer claw 93 is engaged in the round groove 94 of the fixing disc 90. Screw 55 is fitted through the entrance of the transferring disc 90, and when the pin cap 9 has been sent by the screw 55 to its end as well as into the conveyer groove 94 between the conveyer claws 93a and 93b while still waiting for the coming of and conveying by the conveyer claw 93b, the pin cap 9 will stop flat against the straight thread part 95 of the screw 55 and will rest there until engaged by the conveyer claw 93b. Moreover, because there is between the claws 93a sufficient space to contain the pin cap 9, the pin cap 9 will be conveyed by the conveyer claw 93b without any difficulty.The conveyer claw 93b extends into the gear base and can correctly place the pin cap 9 under the punch which can drive the pin wheel curved line and let the pin cap 9 correctly drop into the lower die hole under the punch. There is between the conveyer claws 93b and 93e sufficient space to contain the pin cap because claw 93c is situated at the gear base of the gear wheel curved line 91 and the punch is directed to the upper part of the gear wheel curved line 91. In addition, conveyer claw 93c can be used for the separation and the consecutive incoming of two pin caps. Therefore, when the mixed gear 89 rotates through two revolutions, the screw will rotate through precisely six revolutions.

As shown in Figure 34, the space between the mixed gear 89 and the conveyer claw 93 is fixed by the screws 97 and the space between the shaft centre 98 and the fixed transferring disc 90 accommodates a bearing 99. Moreover, the end of the screw 55 is supported for rotation by a bearing 100.

As shown in Figure 36, the pin cap is leaving the conveyer disc 90 and dropping into the lower die hole and at the end of groove 94 is an oblique guide groove 101 slanting downwardly. The guiding function of the groove 101 will be described in detail hereinafter along with the transference of the pin body.

There is now described with reference to Figures 37,38 and 39 the process of transferring the pin body and the manner in which this operation is carried out by the mixed gear 102, the conveyer claw 103 connected to the lower part of the mixed gear 102, and the bearing which facilitates rotation of the transferring disc 105. Types, constructions and functions of the mixed gear 102 and the conveyer claw 103 are just the same as those of the mixed gear 89 and the conveyer claw 93. The most important differences between them are the transferring groove 152 and the section of the groove 94. The former is used for conveying of the pin body while the latter is used for conveying of the pin cap. The angle between the entrance to and exit from the groove 152 by the pin body is greater than that of the groove 94 because the positions of the parts are quite different as shown in Figure 6.

As shown in Figure 37, after the incoming of the pin body 9 from the screw 88 to the annular transferring groove 152, the pin body will be further conveyed counterclockwise by the conveyer claw 103 to the oblique guide groove 153 alongside groove 152. The guiding function of groove 153 will be described hereinafter.

Combination stamping equipment As shown in Figures 40 and 41, the fixing plate 157 is fixed to the central prop 148 by the key 158 and the nut 159, and therefore does not rotate. However, the driving shaft 144 driven by the universal joint 21 will freely rotate at the surface of the fixing plate 157, although it is supported by the bearing 160. In the meantime, the pinion 22 will be rotated by the key 162 together with the driving shaft 144. At the same time, the pinion 22 gears with the large gear 23 which runs around the central prop 148 by the support of bearing 164. There is an upper rotating disc 165 under the large gear 23 which can rotate with the large gear 23. There is also in the space below the central prop 148 a lower rotating disc 166 which is supported by the bearing 167.Moreover, the space between the aforesaid upper and lower rotating discs 165 and 166 is bridged by six guide posts 168 secured at their ends by bolts 169 and 170.

Therefore, the upper and lower rotating discs 165 and 166 can rotate at the same time. While, as shown in Figure 40, there is on each guide post 168 a sliding block 149 which can slide freely upwards and downwards (refer to Figure 33). In the meantime, the height of the punch 96 can be adjusted by the adjusting bolt 171 and the locking bolt 172 if it is necessary to combine it with the lower die 173. The aforesaid lower die 172 is situated at the lower part of the punch 96 and can rotate synchronously alongside the central prop 148. Below the lower die 173 are lifter pin 175 and spring 174. Its operation is controlled by the cam piece 184 shown in Figure 42 and 43.

As shown in Figure 41, there is a key 176 on the central prop 148 between the upper and lower rotating discs 165 and 166. The key 176 is fixed to the cylinder type cam 177 on the central prop 148. The cam 177 includes a cam groove 178, which cooperates with the rolling wheel 179 on the slide block 149 whereby the latter can rise and fall alongside the cam groove 178 as it is rotated around the central prop 148 (as shown in Figure 33), and at that time combination stamps the pin cap and pin body dropped into the lower die 173.

Reference is now made to Figures 6 and 42. In Figure 6 suppose the point to where exit from the transferring groove 152 of the pin body transferring disc 105 (as shown in Figure 37) and the punch 96 meet agrees with 0 and 360 degrees points of the potential circumference passing through the axes of six punch 96, then spreading drawing of the cam groove 178 shown in Figure 6 will theoretically be as the curved line 178' shown in Figure 43.

Combination stamping process Reference is now again made to Figure 42. Since the pin body transferring disc 105 and the pin cap transferring disc 90 do not move, when the punch 96-1 is moved 10 degrees clockwise (as shown in Figure 6; namely, moved to the left in Figure 42), the conveyer claw 103 will follow closely after punch 96-1 and send the pin body 10 into the oblique guide groove 180 alongside the transferring groove 152, then into the lower die 173-1. When the rotating disc 160 and the punch 96-1 turn to 360 degrees, as shown in Figure 43, the pin body 10 will drop fully into the lower mould 173 and will no longer be controlled by the oblique guide groove 180 orthe conveyer claw 103. However, the stamping head does not start to come down at this time.

As shown in Figure 42, when the punch 96 turns to 70 degrees, a part of the pin cap 9, guided by the slide groove 101 between the thin plate 181 and the transferring disc 90 and also pushed by the conveyer claw 93, will partially cover the upper part of the pin body 10 due to the guiding operation of the oblique guide groove 101, while another part of the pin cap 9 will be supported by the thin plate 181, and the cap 9 will not yet drop fully into the lower mould 173. Now, as shown in Figure 43, when the punch 96-2 and the lower mould 173-2 turn to 90 degrees, the pin cap 9 will completely cover the upper part of the pin body 10 and will no longer be controlled by the oblique guide groove 101 and the conveyer claw 93, but is still pressed by the conveyer claw 90, so that the pin cap 9 and the pin body 10 will not jump out from the lower die 173-2.This being the case, the punch 96-2 still maintains a fixed height and does not start to come down.

As shown in Figure 42, when the stamping head 96-3 and the lower die 173-3 turn to 130 degrees at the same time, the pin cap 9 and the pin body 10 will no longer be controlled by claw 90 but are still pressed by the thin plate 182. Furthermore, at this time, the punch 96-3 has already turned to the starting point of the descent of the curved line 178', and thus will start to come down. In Figure 43, the punch 96-3 and the lower die 173-3 have already turned to 150 degrees, so that the punch has come down a little but the pin cap 9 and the pin body 10 are still pressed by the thin plate 182.

As shown in Figure 42, when the punch 96-4 and the lower die 173-4 turn to 190 degrees, the punch 96-4 will come down closely to the pin cap 9 and the pin body 10. Both cap 9 and body 10 are apart from thin plate 182 but are still pressed by the punch 96-4 so that they do not jump out. In Figure 43 both the punch 96-4 and the lower mould 173-4 have already turned to 210 degrees, namely to the lowest point of the theoretical curved line 178'. Now, the punch 96-4 is ready to operate the engineering of combination stamping and pressing.

As shown in Figure 42, when punch 96-5 and lower mould 173-5 turn to 190 degrees, combination stamping and pressing is already finished, and thus the lifter pin 183-5 will begin to touch the raising section 185 of the cam piece 184 and send the pin hook 8, which is already completed, upwards from the lower die 173-5, the punch 96-5 at the same time beginning to rise. In Figure 43, lower die 173-5 and punch 96-5 have turned to 270 degrees, so that the pin hook 8 is sent fully upwards and the lifter pin 183 has entered the maintaining section 186 of cam piece 184. When it touches the dropping plate 188 of the material collecting basket 187, the pin hook 8 will be automatically collected. At the same time, the punch 96-5 will begin to rise.

As shown in Figure 42, when punch 96-6 turns to 310 degrees, it will pass through the stripping plate 188 on the way, and thus if there are any pin hooks on the punch 96-6, they will be surely stripped and collected in the material collecting basket 187.

To sum up, as shown in Figure 6, after its entrance into the pin body stamping and pressing die 2, the blank will be processed in accordance with the steps shown in Figures 23, 25 and 26, then enter into the screw 88 in accordance with the steps shown in Figures 27 and 28 till the pin cap is completely stamped and cut. Refer again to Figure 3. The blank will be sent into the transferring disc 105 from the screw 88 then and further into the lower die 173 of the rotating disc 166 as shown in Figure 43 by the conveyer claw 103 as shown in Figures 37 and 38.

As shown in Figure 6, after its stamping and pressing processing by the pin cap stamping and pressing die 1 in accordance with the order shown in Figures 10, 11, 12 and 13, the pin cap will enter into the screw 55 in accordance with the steps shown in Figures 14 and 15, then be passed into the lower mould 173 ofthecounterclockwise rotating disc 166, as shown in Figures 42 and 43, by the conveyer claw 93 on the transferring disc, and finally finish its combination stamping and pressing engineering in accordance with the steps shown in Figures 42 and 43.

Claims (22)

1. A method of combination stamping and pressing of a set of two or more product components to be combined, stamped, and pressed, comprising setting the stamping-pressing dies of the set of two or more product components on one and the same stamping bed or pressing bed for stamping and pressing on each occasion the two or more product components simultaneously, transferring the set of two or more product components through a transferring device adapted to the shape of the stampingpressing product sets and reduced in speed relative to the stamping and pressing procedure, and carrying the two or more product components, under the control of the shape and the direction in the transferring process, into a combination stampingpressing device rotating at the identical speed, the combining, stamping and pressing being carried out at the same time or in steps.

2. A device for the combination stamping and pressing of a set of two or more product compo nents to be combined, said device comprising a stamping-pressing die respectively settled on one and the same stamping bed or pressing bed, a transferring device arranged below said stampingpressing die to control the shape and the direction of stamping-pressing product sets cut down from said die within the transferring process at a speed identical to that during the stamping and pressing procedure, and a combination stamping-pressing device to combine, stamp and press the product sets, said device being driven directly or indirectly by the centre shaft of said stamping bed or pressing bed, to cause the combination stamping-pressing device to accomplish the stamping-pressing process.

3. A device as claimed in claim 2, wherein the respective stamping-pressing die is precisely that which effects stamping and pressing simultaneously.

4. A device as claimed in claim 2, further comprising a transferring screw fitted below said respective stamping-pressing die to accept and carry the stamped and pressed sets cut down during or contemporaneously with the stamping and pressing process, and send same to the combination stamping-pressing device, a conveyer claw fitted at the end of the transferring screw to convey the product set on the transferring screw along a circular path into the combination stamping-pressing die mixed gears to drive said conveyer claw in rotation in one direction, and an annular slide groove provided for the product sets to be carried into the combination stamping-pressing die by the end of the transferring screw along the circular path.

5. A device as claimed in claim 2, including a transferring screw fitted below said respective stamping-pressing die to accept and carry the stamped and pressed sets cut down during or contemporaneously with the stamping-pressing process, and send same to the combination stampingpressing device, a conveyer claw fitted at the end of the transferring screw to convey the product sets on the transferring screw along a circular path into the combination stamping-pressing die, mixed gears to drive said conveyer claw in rotation in one direction, an annular slide groove provided for the product sets to be carried along the circular path into the combination stamping-pressing die by the end of the transferring screw, and a rotating device to rotate the first product sets before the product sets are transferred into the combination stamping-pressing device.

6. A device as claimed in claim 5, in which said slide groove is located above the transferring screw to guide the stamped and pressed product sets.

7. A device as claimed in claim 6, in which said direction of the slide groove is parallel with the shaft centre of the transferring screw.

8. A device as claimed in claim 4, wherein one flank of the teeth of the mixed gears is the shape of the gear curved lines, and the other flank is the shape of the pin wheel curved lines.

9. A device as claimed in claim 8, in which the adjacent flanks of any two adjacent gear teeth are symmetrical about a line passing through the centre of the gear and bisecting the intervening trough.

10. A device as claimed in claim 9, wherein the flanks in the shape of the pin wheel curved lines are driven by the side cutting punch of the combination stamping-pressing die.

11. A device as claimed in claim 9, in which the flanks in the shape of the gear curved lines are driven by the cylindrical gear of the combination stamping-pressing device.

12. A device as claimed in claim 5, at the border outlet between the fixed plate groove through which the conveyer claw is passed and the combination stamping-pressing device is an oblique guide groove to send the product sets safely into the combination lower die shoe of the stampingpressing device.

13. A device as claimed in claim 3, wherein the end of the transferring screw possesses a short straight line vertical with the shaft to maintain the position of the product sets that have just entered said plate groove and are awaiting conveyance by the conveyer claw.

14. A device as claimed in claim 5, in which said rotating device to rotate the product sets possesses a transferring shaft straight above or laterally above the transferring screw, and the direction of the transferring shaft is opposite to that of the transferring screw therebelow.

15. A device as claimed in claim 14, wherein said transferring device includes a pushing plate settled at the side of said transferring shaft and above the transferring screw to push the product sets from the transferring shaft after being rotated along the guide of the pushing plate, and driven by the transferring screw.

16. A device as claimed in claim 5, in which some grooves are set along the transferring shaft, and the transferring pin is settled in the groove to cause the product sets that drop down into the groove to be rotated along the groove and sent into the transferring screw by the rotation of the transferring pin in accordance with the transferring shaft.

17. A device as claimed in claim 2, including a centre fixed shaft settled on the operation bed, several vertical props fitted above the centre fixed shaft and on the under upper rotating plate and lower rotating plate to bridge between said upper and lower rotating plates, a slide block set upon each of the props, cylindrical cams of which keys are set on the fixed shaft; a side cutting punch set on the slide block, combining lower die opposite to the under side of the combination side cutting punch on each slide block, a lifter pin set in the combining die and the spring to cause the combining die to descend before the lifter pin is affected by the cam piece, a driving rolling wheel set on the slide block and entering the cylindrical cam to make the slide block rise or descend along the guide prop on following the curved lines of a groove in the cylindrical cam while the slide block rotates in accordance with the guide prop, and a gear wheel fitted on the rotating plate and driven by the centre shaft of the stamping bed or pressing bed.

18. A device as claimed in claim 17, wherein the height and the plane surface position of the com bination stamping head can be adjusted.

19. A device as claimed in any one of claims 2 to 18, including means to stamp and press again the half-produced sets that need stamping and pressing once more after the blank is cut, said means comprising the original stamping-pressing die cooperating with the stamping bed to stamp and press the blank first and cut the blank, a transferring device to convey the half-produced sets cut from the said original stamping-pressing die into the stamping-pressing device for stamping and pressing again, and a further processing device to accept the half-produced sets from the said transferring device for stamping and pressing once more.

20. A device as claimed in claim 19, wherein said original stamping-pressing die and the further processing device are driven by the chief shaft of one and the same stamping bed.

21. A device as claimed in claim 19, wherein said transferring device includes a transferring screw settled under the original stamping-pressing die to carry the half-produced sets cut from the original stamping-pressing die during its working process and send the half-produced sets into the further stamping and pressing device, a conveyor claw settled on the end of the said transferring screw to send the half-produced sets carried by the said transferring screw into the further stampingpressing device, a mixed gear to drive the said conveyer claw to move in one-way circulation, and an annular slide groove provided for the halfproduced sets to be transferred from the end of the transferring screw along a circular path into the further stamping-pressing device.

22. A device as claimed in claim 19, wherein said further processing device includes a centre fixed shaft settled on the working bed, upper and the lower rotating plates respectively fitted above and below said centre fixed shaft, several vertical guide post to bridge between said upper and lower rotating plates, slide blocks respectively fitted one on each of the guide posts, a cylindrical cam of which a key is set on said centre fixed shaft, a further side cutting punch settled on each of the slide block, a further stamping-pressing lower die opposite to the underside of the further side cutting punch on each of said slide blocks; a lifter pin set in the further stamping-pressing lower die shoe and a spring that causes said stamping-pressing lower die shoe to descend before the lifter pin is affected by the cams, a driving rolling wheel mounted on each said slide block and entering the groove of the respective cylindrical cam, a gear wheel jointed with the upper rotating plate and driven by the centre shaft of the stamping bed or pressing bed, and cams fixed on the bed and symmetrical to the underside of the said upper material pin for the upper material pin to push the stamping-pressing produced sets out of the lower die.