A punching die

Abstract

The present invention relates to the field of mold technology, and discloses a punching mold, including a base, a lower mold, an upper mold, and a driving mechanism for driving the upper mold to move up and down, the lower mold including a fixed mold and a movable mold arranged relatively, the fixed mold is fixedly connected to the base, the movable mold is slidably connected to the base, the right end face of the fixed mold is provided with a left half hole, and the left end face of the movable mold is provided with a right half hole corresponding to the left half hole; the upper mold is abutted with the movable mold, and the upper mold moves downward to drive the movable mold to fit with the solid mold in the process of punching the workpiece so that the left half hole and the right half hole are combined to form a complete waste through hole. The present invention does not need to reduce the thickness of the upper half of the waste through hole so that the waste through hole has a sufficiently large supporting force, and at the same time, the punch only needs to penetrate the workpiece without inserting too much into the waste through hole, thereby reducing the length of the punch, making the punch not easy to break, and furthermore, by splitting the waste through hole, it is possible to prevent the waste from being stuck in the waste through hole.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, and in particular to a punching mould. Background Art

[0002] Punching dies are used to punch along the closed contour of a blank or metal sheet to separate waste from the workpiece, ultimately obtaining a workpiece with a hole.

[0003] During the punching process, the upper die is usually driven and controlled to move downward, the punch is set below the upper die, a waste through hole corresponding to the punch is opened in the lower die, the workpiece is placed on the lower die, and the punch penetrates the workpiece and is inserted into the waste through hole as the upper die moves downward, and the waste falls into the waste through hole. In order to prevent the waste from being stuck in the waste through hole and unable to fall, the prior art will increase the length of the punch so that the punch can poke the waste out of the waste through hole. However, the increase in the length of the punch will increase the risk of the punch breaking.

[0004] For example, the Chinese invention patent with application number CN201310342147.4, publication (announcement) number CN104338828B, and name “Small hole punch anti-breakage punching die” discloses “an upper die and a lower die, the upper die includes an upper clamping plate, a stop plate and a stripping plate positioned in sequence from top to bottom; there is an elastic space between the upper clamping plate and the stop plate, the lower die includes a lower template, the product to be punched is arranged between the stripping plate and the lower template, and a two-stage punch is provided, the punch includes a columnar hitting rod and a stepped sub-punch arranged below the columnar hitting rod, the sub-punch includes a stop portion and a punch head located below the stop portion, the radial width of the punch head is smaller than the radial width of the stop portion, the radial width of the punch head is smaller than the radial width of the columnar hitting rod, the columnar hitting rod passes through the stop plate and is positioned in the stripping plate, the stop portion is positioned in the stripping plate, the punch head passes through the stripping plate; corresponding to the punch head, a waste material through hole is provided on the lower template”. The punch is designed to be two-section, divided into a columnar hitting rod and a sub-punch. Compared with the traditional punch, the length of the sub-punch that plays a blanking role is shortened, which can effectively reduce the breakage and damage of the punch. At the same time, the radial width of the punch head is smaller than the radial width of the stopper, and the radial width of the punch head is smaller than the radial width of the columnar hitting rod, that is, it still has the shape of a three-stage A punch, which can further reduce the breakage and damage of the punch.

[0005] Although the punching die provided by the above-mentioned invention patent can reduce the probability of punch breakage to a certain extent by improving the structure of the punch, its disadvantage is that in the above-mentioned patent, it can be clearly seen from its drawings that the waste through hole includes an upper half and a lower half, and the diameter of the lower half of the waste through hole is larger than the diameter of the upper half so that the waste can fall freely after entering the lower half of the waste through hole. As is well known, the diameter of the upper half of the waste through hole needs to match the diameter of the punch head to ensure the quality of the workpiece punching during the punching process, because if the diameter of the upper half of the waste through hole is excessively larger than the diameter of the punch head, the workpiece will be dented at the punching point during punching, affecting the punching quality. Moreover, the upper half of the waste hole needs to ensure a certain thickness so that it has a sufficiently large supporting force to prevent the waste hole from being compressed and deformed due to lack of sufficient supporting force during the punching process. At the same time, in order to allow the waste to fall smoothly from the waste hole without getting stuck in the waste hole, the punch head in the above patent needs to pass through the workpiece and then through the upper half of the waste hole to push the waste into the lower half of the waste hole (because the diameter of the upper half of the waste hole is compatible with the diameter of the punch head, if the waste stays in the upper half of the waste hole, it is easy to get stuck in the waste hole. Only by using the punch head can the waste be pushed into the lower half of the waste hole with a larger diameter). The punch head passing through the upper half of the waste hole will undoubtedly increase the length of the punch head, and the diameter of the punch head is small, which greatly increases the probability of the punch head breaking. It can be seen that how to reduce the length of the punch head without reducing the thickness of the upper half of the waste hole and prevent the waste from getting stuck in the waste hole is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to provide a punching die to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a punching die, comprising a base, a lower die, an upper die and a driving mechanism for driving the upper die to move up and down, the lower die comprising a fixed die and a movable die arranged opposite to each other, the fixed die is fixedly connected to the base, the movable die is slidably connected to the base, a left half hole is formed on the right end surface of the fixed die, and a right half hole corresponding to the left half hole is formed on the left end surface of the movable die;

[0008] The upper die is in abutment with the movable die, and the upper die moves downward to drive the movable die to fit with the fixed die during the process of punching the workpiece so that the left half hole and the right half hole are combined to form a complete waste through hole;

[0009] During the upward movement of the upper mold, the movable mold is driven to slide in a direction away from the fixed mold so as to separate the left half hole from the right half hole.

[0010] The above-mentioned punching die is provided with an elastic support member on the solid die, and the upper die is rotatably provided on the elastic support member. In the first half of the process of the upper die moving downward, the upper die makes a rotational motion to push the movable die to slide toward the solid die until the movable die and the solid die are fitted together; in the second half of the process of the upper die moving downward, the upper die presses down the elastic support member to make the upper die move vertically downward to realize punching.

[0011] The above-mentioned punching die, the elastic support member includes two guide plates fixed on the fixed die and arranged opposite to each other, a guide groove is provided on the opposite surfaces of the two guide plates, a slider is slidably arranged in the two guide grooves, a compression spring is installed between the bottom of the guide groove and the bottom of the slider, a rod body is rotatably arranged between the two sliders, and the upper die is rotatably arranged on the rod body.

[0012] The above-mentioned punching die, the upper die includes a rotating plate rotatably set on the rod body, a connecting block is fixedly provided on the rotating plate, a sliding groove is opened on the connecting block, a cylindrical rod is slidably clamped in the sliding groove, and a flange detachably connected to the output end of the driving mechanism is fixedly provided on the cylindrical rod.

[0013] In the above-mentioned punching die, one end of the rotating plate is a first arc plate, and the end of the first arc plate abuts against the right side of the movable die. In the first half of the process in which the driving mechanism drives the upper die to move downward, the end of the first arc plate pushes the right side of the movable die to make the movable die slide and fit with the fixed die.

[0014] In the punching die mentioned above, a punch is detachably mounted on the connecting block, and in the second half of the process when the driving mechanism drives the cylindrical rod to move vertically downward, the punch is in a vertical state and is coaxial with the waste through hole.

[0015] The above-mentioned punching die has an extension plate fixedly installed on the movable die, and the end of the extension plate away from the movable die slides through the solid die and then fixedly installed with a vertical plate, the vertical plate is slidably connected to the base, and the other end of the rotating plate is a second arc plate that abuts against the left side surface of the vertical plate. In the process of the driving mechanism driving the upper die to move upward, the end of the second arc plate pushes the vertical plate to slide to the right to drive the movable die to separate from the solid die.

[0016] In the punching die mentioned above, a plurality of rollers arranged in parallel are rotatably provided at the end of the first arc plate, and the plurality of rollers are in abutment with the right side surface of the movable die.

[0017] The punching die mentioned above has a leakage hole corresponding to the waste hole on the top of the base, and a collecting hole connected to the leakage hole is provided inside the base, and the waste falls into the collecting hole after passing through the leakage hole.

[0018] In the punching die mentioned above, a collection box with an open top is slidably inserted into the collection hole.

[0019] Beneficial effect: In the above technical scheme, the punching die provided by the present invention divides the waste through hole into a left half hole and a right half hole, and the left half hole is located on the right end surface of the fixed die, and the right half hole is located on the left side surface of the movable die. When punching the workpiece, under the driving action of the upper die, when the movable die and the fixed die are fitted, the left half hole and the right half hole are combined to form a complete waste through hole. At this time, the upper die can perform normal punching operations on the workpiece, and when punching, it is only necessary for the punch to penetrate the workpiece and punch out the waste, without extending the length of the punch and inserting too much. The waste material is inserted into the waste hole, thereby reducing the length of the punch and reducing the risk of breaking. After the waste material is punched out, it enters the waste hole. At this time, there is no need to deliberately reduce the thickness of the waste hole, nor is there any need to consider whether the waste material will get stuck in the waste hole. After the punching is completed, the driving mechanism drives the upper die to move upward, and at this time the upper die drives the movable die to slide in the direction away from the solid die, so that the movable die is separated from the solid die, that is, the left half hole and the right half hole are separated. At this time, the waste hole is split and the aperture becomes larger, so that the waste material can fall smoothly and will not get stuck in the waste hole. It can be seen that compared with the prior art, the present invention does not need to reduce the thickness of the upper half of the waste hole (that is, the thickness of the waste hole in the present invention) so that the waste hole has a sufficiently large supporting force. At the same time, the punch only needs to penetrate the workpiece, and there is no need to insert too much into the waste hole, thereby reducing the length of the punch and making it difficult for the punch to break. Furthermore, by splitting the waste hole, it is possible to prevent the waste material from getting stuck in the waste hole, effectively solving the deficiencies pointed out in the prior art.

[0020] Furthermore, the present invention adjusts the connection mode between the upper die and the lower die so that the merging and splitting of the waste via holes can be automatically realized only during the punching process of the upper die and the resetting process of the upper die, respectively. The implementation mode is extremely convenient, and there is no need to perform the merging and splitting operations of the waste via holes separately, which does not increase the complexity of punching.

[0021] At the same time, after the punching is completed, the movable mold is separated from the solid mold when the upper mold is reset, and a gap is generated between the movable mold and the solid mold at this time, so that the bottom of the workpiece located between the movable mold and the solid mold is suspended in the air and does not fit with the top surface of the lower mold. Therefore, when removing the workpiece, the fingers can be inserted into the gap between the movable mold and the solid mold and apply an upward force to the workpiece, so that the workpiece is lifted up and then grabbed and removed. In the prior art, after the workpiece is stamped, its bottom is still in contact with the top surface of the lower mold. When the workpiece is a straight metal plate, it will be very difficult to remove the workpiece because the fingers cannot apply force. Compared with the prior art, in the present invention, after the workpiece is stamped, the movable mold is separated from the solid mold, so that part of the bottom area of ​​the workpiece is no longer in contact with the top surface of the lower mold, which is convenient for the fingers to apply force, so that the workpiece can be removed more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic diagram of the structure of the punching die after the driving mechanism is removed in the initial state provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of the punching die after the driving mechanism and the collecting box are removed in the initial state provided by an embodiment of the present invention;

[0025] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the enlarged structure of part A;

[0026] Figure 4 A schematic diagram of the disassembled structure of the punching die without the driving mechanism provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of an upper mold provided by an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the structure between the solid mold and the elastic support member provided in an embodiment of the present invention;

[0029] Figure 7 A schematic cross-sectional view of the punching die in an initial state provided by an embodiment of the present invention;

[0030] Figure 8 A schematic cross-sectional structure diagram of a punching die for merging waste vias provided in an embodiment of the present invention;

[0031] Fig. 9 A schematic cross-sectional structural diagram of a punching die when a punch punches out waste material provided by an embodiment of the present invention;

[0032] Fig.10 A schematic diagram of the cross-sectional structure of the punching die after the upper die is reset provided in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Base; 101. First T-type slideway; 102. Leakage hole; 103. Collecting hole; 2. Fixed mold; 201. Left half hole; 202. Socket; 3. Moving mold; 301. Second T-type slideway; 302. Right half hole; 303. First slide plate; 4. Guide plate; 5. Turn plate; 501. First arc plate; 502. Second arc plate; 503. Roller; 6. Connecting block; 601. Slide groove; 7. Flange; 701. Cylindrical rod; 8. Right baffle; 801. First rear baffle; 9. Extrusion spring; 10. Punch; 11. Extension plate; 12. Vertical plate; 1201. Second slide plate; 13. Left baffle; 1301. Second rear baffle; 14. Collecting box; 15. Compression spring; 16. Rod body; 17. Sliding block; 18. Workpiece; 19. Waste. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] like Figure 1-10 As shown, a punching die provided by an embodiment of the present invention comprises a base 1, a lower die, an upper die and a driving mechanism for driving the upper die to move up and down, the lower die comprises a fixed die 2 and a movable die 3 which are arranged opposite to each other, the fixed die 2 is fixedly connected to the base 1, the movable die 3 is slidably connected to the base 1, a left half hole 201 is formed on the right end surface of the fixed die 2, and a right half hole 302 corresponding to the left half hole 201 is formed on the left end surface of the movable die 3;

[0037] The upper die is in contact with the movable die 3, and the upper die moves downward to punch the workpiece 18, driving the movable die 3 to fit with the fixed die 2 so that the left half hole 201 and the right half hole 302 are combined to form a complete waste through hole;

[0038] During the upward movement of the upper mold, the movable mold 3 is driven to slide in a direction away from the fixed mold 2 to separate the left half hole 201 from the right half hole 302 .

[0039] The punching die provided in this embodiment is used for punching a workpiece, and can reduce the length of the punch head (equivalent to the punch 10 in the present invention) in the prior art, thereby greatly reducing the probability of the punch 10 breaking during use, so as to increase the service life of the punch 10. The words related to direction and position such as "left", "right", "upper", and "lower" involved in this embodiment are relative to the accompanying drawings. Specifically, the workpiece 18 is placed on the lower die, and the upper die is located above the lower die. The driving mechanism (not shown in the figure) is used to provide an upward and downward driving force to the upper die, thereby driving the upper die to move up and down. The driving mechanism is a hydraulic cylinder, which will not be repeated. A punch 10 corresponding to the waste through hole is detachably mounted on the upper die. The punch 10 is used to punch the workpiece 18 to form a hole in the workpiece 18. After the punch 10 penetrates the workpiece 18, the punch 10 stops moving downward without the need for the punch 10 to extend downward too much. At this time, waste 19 is cut out of the workpiece 18 to form a punched hole. The waste through hole is located on the lower die and corresponds to the punch 10. The diameter of the punch 10 is matched with the diameter of the waste through hole so that the punching position of the workpiece 18 will not be recessed during punching. At this time, the cut waste 19 enters the waste through hole. Since the diameter of the punch 10 is matched with the diameter of the waste through hole, when the thickness of the waste through hole is not reduced and the length of the punch 10 is short, the waste 19 will be stuck in the waste through hole due to the lack of the pushing force of the punch 10, making it difficult for the waste 19 to slide out of the waste through hole. To this end, in the present invention, the lower mold includes a solid mold 2 and a movable mold 3, the top surfaces of the solid mold 2 and the movable mold 3 are located in the same horizontal plane, the solid mold 2 is fixedly installed on the top of the base 1, and the top of the base 1 is provided with two first T-shaped slideways 101 arranged opposite to each other, and the bottom of the movable mold 3 is fixedly installed with a first slide plate 303 corresponding to the two first T-shaped slideways 101 one by one, and the first slide plate 303 is slidably clamped in the corresponding first T-shaped slideway 101 so that the movable mold 3 is slidably connected with the base 1, and the movable mold 3 can slide toward and away from the solid mold 2, and the waste through hole is divided into a left half hole 201 and a right half hole 302, the left half hole 201 is located on the right end surface of the solid mold 2 and passes through the top and bottom surfaces of the solid mold 2, and the right half hole 302 is located on the movable mold 3 and penetrates the top and bottom surfaces of the movable mold 3, and the right end surface of the solid mold 2 is fitted with the left end surface of the movable mold 3. When the movable mold 3 is slid to make the movable mold 3 and the solid mold 2 fit together, the left half hole 201 and the right half hole 302 are combined to form a complete waste through-hole. The complete waste through-hole means that the cross-section of the waste through-hole is a complete circle. At this time, the punch 10 can punch the workpiece 18 normally; when the movable mold 3 slides in the direction away from the solid mold 2, the movable mold 3 is separated from the solid mold 2. At this time, the left half hole 201 and the right half hole 302 are separated, so that the waste through-hole is divided into two. At this time, the cross-section of the waste through-hole is two separated semicircles, so that the waste 19 located in the waste through-hole can fall under the action of gravity and will not be stuck in the waste through-hole.Because the driving mechanism drives the upper mold to move up and down, the upper mold generates power, and the upper mold abuts and cooperates with the movable mold 3, so that the power generated by the upper mold can be transmitted to the movable mold 3, providing the movable mold 3 with sliding power. The working principle of the present invention is as follows: in the initial state, the movable die 3 is separated from the solid die 2, and the workpiece 18 is first placed on the lower die and adjusted to an appropriate position, and then the driving mechanism is started to drive the upper die to move downward. During the downward movement of the upper die, the movable die 3 is first pushed to slide toward the solid die 2 until the left side of the movable die 3 is in contact with the right side of the solid die 2, so that the left half hole 201 and the right half hole 302 are combined to form a complete waste through hole, and then the upper die continues to move downward to drive the punch 10 to punch the workpiece 18 downward. At this time, the punch 10 is located directly above the waste through hole. During the punching process, the left half hole 201 and the right half hole 302 are always combined. Under the impact of the punch 10, the workpiece 18 is penetrated by the punch 10 to form a punched hole, and the waste 19 is punched out of the workpiece 18 and enters the waste through hole. At this time, the bottom of the punch 10 only needs to slightly protrude from the bottom of the workpiece 18 to ensure that the workpiece 18 can be penetrated by the punch 10 to form a punched hole, without the need for punching. The bottom of the head 10 is inserted too much into the waste through-hole, so that the punch 10 of the present invention (equivalent to the punch head in the prior art) is shorter than that of the prior art, that is, the length of the punch 10 is reduced. At the same time, the thickness of the waste through-hole does not need to be reduced, so that the waste through-hole can provide sufficient support so that the port of the waste through-hole is not easily deformed. At this time, the punch 10 cannot push the waste 19 out of the waste through-hole (equivalent to the upper half of the waste through-hole in the prior art). After the punching is completed, the driving mechanism drives the upper die to move upward. During the upward movement of the upper die, the punch 10 is first driven to move upward to move it out of the workpiece 18. Thereafter, the upper die continues to move upward, pushing the movable die 3 to slide in a direction away from the fixed die 2, so that the left half hole 201 and the right half hole 302 are separated again. At this time, the waste through-hole is split into left and right halves, so that the waste 19 in the waste through-hole will fall smoothly under the action of its own gravity, so that the waste 19 will not be stuck in the waste through-hole. The main innovation of the present invention is that without reducing the thickness of the upper half of the waste via in the prior art, the waste via is split and designed, so that the waste via is automatically merged into a whole when the workpiece is punched, and the waste via is automatically separated when the punching is completed to allow the waste to fall, and there is no need to increase the length of the punch to push the waste out of the waste via. In the prior art, the waste via includes an upper half and a lower half, and the diameter of the lower half of the waste via is greater than the diameter of the upper half so that the waste can fall freely after entering the lower half of the waste via. As is well known, the diameter of the upper half of the waste via needs to match the diameter of the punch head to ensure the quality of the workpiece punching during the punching process, because if the diameter of the upper half of the waste via is excessively greater than the diameter of the punch head, the workpiece will be dented at the punching position during the punching, affecting the punching quality.Moreover, the upper half of the waste hole needs to ensure a certain thickness so that it has a sufficiently large supporting force to prevent the waste hole from being compressed and deformed due to lack of sufficient supporting force during the punching process. At the same time, in order to allow the waste to fall smoothly from the waste hole without getting stuck in the waste hole, the punch head in the above patent needs to pass through the workpiece and then through the upper half of the waste hole to push the waste into the lower half of the waste hole (because the diameter of the upper half of the waste hole is compatible with the diameter of the punch head, if the waste stays in the upper half of the waste hole, it is easy to get stuck in the waste hole. Only by using the punch head can the waste be pushed into the lower half of the waste hole with a larger diameter). The punch head passing through the upper half of the waste hole will undoubtedly increase the length of the punch head, and the diameter of the punch head is small, which greatly increases the probability of the punch head breaking. It can be seen that how to reduce the length of the punch head without reducing the thickness of the upper half of the waste hole and prevent the waste from getting stuck in the waste hole is a technical problem that needs to be solved urgently.

[0040] In this embodiment, the waste material through hole is divided into a left half hole 201 and a right half hole 302, and the left half hole 201 is located on the right end surface of the solid mold 2, and the right half hole 302 is located on the left side surface of the movable mold 3. When punching the workpiece 18, under the driving action of the upper mold, when the movable mold 3 and the solid mold 2 are attached, the left half hole 201 and the right half hole 302 are combined to form a complete waste material through hole. At this time, the upper mold can perform normal punching operations on the workpiece 18, and when punching, it is only necessary for the punch 10 to penetrate the workpiece 18 and punch out the waste material 19, without extending the length of the punch 10 and inserting too much waste material. After the waste 19 is punched out, it enters the waste hole. At this time, there is no need to deliberately reduce the thickness of the waste hole, nor is there any need to consider whether the waste 19 will be stuck in the waste hole. After the punching is completed, the driving mechanism drives the upper die to move upward. At this time, the upper die drives the movable die 3 to slide away from the solid die 2 to separate the movable die 3 from the solid die 2, that is, the left half hole 201 and the right half hole 302 are separated. At this time, the waste hole is split and the aperture becomes larger, so that the waste 19 can fall smoothly without being stuck in the waste hole. It can be seen that, compared with the prior art, the present invention does not need to reduce the thickness of the upper half of the waste via hole (i.e., the thickness of the waste via hole in the present invention) so that the waste via hole has a sufficiently large supporting force. At the same time, the punch 10 only needs to penetrate the workpiece 18, and does not need to be inserted too much into the waste via hole, thereby reducing the length of the punch 10 and making the punch 10 less likely to break. Furthermore, by splitting the waste via hole, it is possible to prevent the waste 19 from being stuck in the waste via hole, effectively solving the deficiencies pointed out in the prior art.

[0041] Furthermore, the present invention adjusts the connection mode between the upper die and the lower die so that the merging and splitting of the waste via holes can be automatically realized only during the punching process of the upper die and the resetting process of the upper die, respectively. The implementation mode is extremely convenient, and there is no need to perform the merging and splitting operations of the waste via holes separately, which does not increase the complexity of punching.

[0042] At the same time, after the punching is completed, the movable mold 3 is separated from the solid mold 2 when the upper mold is reset, and a gap is generated between the movable mold 3 and the solid mold 2, so that the bottom of the workpiece 18 located between the movable mold 3 and the solid mold 2 is suspended and does not fit with the top surface of the lower mold. Therefore, when removing the workpiece 18, the fingers can be inserted into the gap between the movable mold 3 and the solid mold 2 and apply an upward force to the workpiece 18, so that the workpiece 18 is lifted and then grabbed and removed. In the prior art, after the workpiece 18 is stamped, its bottom is still in contact with the top surface of the lower mold. When the workpiece 18 is a straight metal plate, it will be very difficult to remove the workpiece 18 because the fingers cannot apply force. Compared with the prior art, in the present invention, after the workpiece 18 is stamped, the movable mold 3 is separated from the solid mold 2, so that the bottom part of the workpiece 18 is no longer in contact with the top surface of the lower mold, which is convenient for the fingers to apply force, so that the workpiece 18 can be removed more easily.

[0043] In this embodiment, an elastic support member is provided on the solid mold 2, and the upper mold is rotatably provided on the elastic support member. The elastic support member supports the upper mold. In the process of the driving mechanism driving the upper mold to move downward, the upper mold will perform different types of front half-process movements and rear half-process movements. In the front half of the process of the upper mold moving downward, a rotational movement is performed to push the movable mold 3 to slide toward the solid mold 2 until the movable mold 3 is fitted with the solid mold 2; in the rear half of the process of the upper mold moving downward, the upper mold presses down the elastic support member to make the upper mold move vertically downward to achieve punching. Specifically, in the initial state, the upper die is tilted and rotated. When the workpiece 18 is punched, the driving mechanism drives the upper die to move downward. First, under the action of the elastic support, the upper die rotates clockwise. At this time, one end of the upper die pushes the right side of the movable die 3 to make the movable die 3 slide toward the fixed die 2 until the left side of the movable die 3 is fitted with the right side of the movable die 2. After fitting, the movable die 3 cannot continue to slide so that the upper die cannot continue to rotate. The movable die 3 plays a role of limiting. Thereafter, the upper die enters the second half of the process. In the second half of the process, the upper die cannot continue to rotate and will drive the elastic support to move vertically downward, and the right side of the movable die 3 is vertical, so that the upper die moves vertically downward. The upper die then drives the punch 10 to move vertically downward, so that the punch 10 punches the workpiece 18.

[0044] Among them, the elastic support member includes two guide plates 4 fixed on the fixed mold 2 and arranged oppositely. A guide groove is provided on the opposite surfaces of the two guide plates 4. The guide groove is vertically arranged. A slider 17 is slidably arranged in the two guide grooves. The left and right sides of the slider 17 are respectively slidably fitted with the left and right sides of the guide groove so that the slider 17 can only slide in the vertical direction. A compression spring 15 is installed between the bottom of the guide groove and the bottom of the slider 17. The compression spring 15 is always in a compressed state. In the initial state, under the elastic force of the compression spring 15, the top of the guide groove abuts against the top of the slider 17. A rod body 16 is rotatably arranged between the two sliders 17, and the upper mold is rotatably arranged on the rod body 16. Specifically, in the first half of the process of the upper mold moving downward, under the elastic force of the compression spring 15, the rod body 16 has sufficient supporting force on the upper mold, so that the upper mold can only rotate clockwise, and when the movable mold 3 is in contact with the solid mold 2 so that the upper mold cannot rotate, the waste hole is in a merged state, and the upper mold enters the second half of the process. At this time, the upper mold presses the rod body 16 downward under the action of the driving mechanism, and the rod body 16 drives the two sliders 17 to slide vertically along the guide groove, and the end of the upper mold slides and abuts against the vertical right side of the movable mold 3, so that the upper mold can slide vertically stably. In this process, the movable mold 3 is always in contact with the solid mold 2, and the waste hole is always in a merged state, and then the punch 10 punches the workpiece 18.

[0045] In this embodiment, the upper mold includes a rotating plate 5 rotatably arranged on the rod body 16, a connecting block 6 is fixedly arranged on the rotating plate 5, a sliding groove 601 is provided on the connecting block 6, a cylindrical rod 701 is slidably engaged in the sliding groove 601, and a flange 7 detachably connected to the output end of the driving mechanism is fixedly arranged on the cylindrical rod 701. Specifically, the sliding groove 601 is T-shaped so that the cylindrical rod 701 will not be separated from the top of the sliding groove 601, the sliding groove 601 passes through the right side or left side of the connecting block 6, so that the cylindrical rod 701 is installed in the sliding groove 601, the top of the cylindrical rod 701 is slidably abutted against the top surface of the sliding groove 601, and the bottom of the cylindrical rod 701 is slidably abutted against the bottom surface of the sliding groove 601. Since the cylindrical rod 701 is a cylindrical body, the cylindrical rod 701 can slide in the sliding groove 601 and rotate at the same time. A vertical rod is integrally arranged on the cylindrical rod 701, and the flange 7 is fixedly arranged on the top of the vertical rod. The output end of the driving mechanism is in a vertical state and is fixedly installed with another flange that is compatible with the flange 7. The flange at the output end of the driving mechanism is connected to the flange 7 by bolts. When the driving mechanism drives the upper mold to move downward, a vertical downward force will be applied to the flange 7, and the flange 7 pushes the cylindrical rod 701 downward to press the connecting block 6. The connecting block 6 then drives the rotating plate 5 to rotate downward around the rod body 16 (i.e., rotate clockwise) so that the end of the rotating plate 5 abuts against the right side of the movable mold 3 and pushes the movable mold 3 to slide toward the solid mold 2 until the movable mold 3 is fitted with the solid mold 2. During this process, the connecting block 6 and the cylindrical rod 701 slide and rotate at the same time. Thereafter, under the limiting action of the movable mold 3, the rotating plate 5 stops rotating, and the rotating plate 5 slides down vertically along the guide groove and the right side of the movable mold 3, so that the connecting block 6 also slides down vertically until the punch 10 completes the punching of the workpiece 18.

[0046] Among them, one end of the rotating plate 5 is the first arc plate 501, and the end of the first arc plate 501 is in sliding contact with the right side of the movable mold 3. In the first half of the process when the driving mechanism drives the upper mold to move downward, the end of the first arc plate 501 pushes the right side of the movable mold 3 to make the movable mold 3 slide and fit with the solid mold 2.

[0047] The connection block 6 is detachably mounted with a punch 10, which can be screwed or clamped with the connection block 6. The punch 10 is located below the connection block 6 and moves with the movement of the connection block 6. In the second half of the process when the driving mechanism drives the cylindrical rod 701 to move vertically downward, the punch 10 is in a vertical state and coaxial with the waste through hole. Specifically, as the upper die moves downward, when the movable die 3 is pushed by the end of the first arc plate 501 to fit with the solid die 2, the punch 10 is in a vertical state and coaxial with the waste through hole. Thereafter, the punch 10 moves downward with the vertical downward movement of the connection block 6 to punch the workpiece 18. Among them, since the solid die 2 is fixed, each time the movable die 3 fits with the solid die 2, the sliding distance of the movable die 3 is the same, so that the angle of the clockwise rotation of the rotating plate 5 is the same each time, and then the punch 10 is kept vertically sleeved and coaxial with the waste through hole each time the upper die moves in the second half.

[0048] Furthermore, an extension plate 11 is fixedly installed on the movable mold 3, and a vertical plate 12 is fixedly installed on the end of the extension plate 11 away from the movable mold 3 after sliding through the solid mold 2. A socket 202 corresponding to the extension plate 11 is opened on the solid mold 2 to allow the extension plate 11 to pass through the socket 202. The vertical plate 12 is slidably connected to the base 1, and two second slides 1201 with the same structure as the first slide 303 are fixedly installed on the bottom of the vertical plate 2. The two second slides 1201 are slidingly clamped in the two first T-shaped slides 101 in a one-to-one manner. The other end of the rotating plate 5 is a second arc plate 502 that abuts against the left side surface of the vertical plate 12. When the driving mechanism drives the upper mold to move upward, the end of the second arc plate 502 pushes the vertical plate 12 to slide to the right to drive the movable mold 3 to separate from the solid mold 2. Specifically, after punching is completed, the driving mechanism drives the upper die to move upward, and the process of the upper die moving upward is the reverse process of its downward movement, that is, the process of the upper die moving upward is divided into a first half process and a second half process. In the first half process of the upper die moving upward, the driving mechanism drives the cylindrical rod 701 to move vertically upward, and the cylindrical rod 701 drives the connecting block 6 to move vertically upward. At the same time, under the elastic force of the compression spring 15, the rotating plate 5 moves vertically upward, so that the punch 10 is vertically separated from the workpiece 18, until the top of the two sliders 17 abuts against the top surfaces of the two guide grooves. At this time, the upper die enters the second half of the upward movement. During the second half of the upward movement of the upper mold, the rotating plate 5 is driven to rotate upward (i.e., counterclockwise) under the action of the pulling force on the cylindrical rod 701. At this time, the end of the second arc plate 502 gradually approaches the left side of the vertical plate 12 and slides against the left side of the vertical plate 12. Then the second arc plate 502 pushes the vertical plate 12 to slide to the right. The vertical plate 12 drives the movable mold 3 to slide to the right through the extension plate 11 to separate the movable mold 3 from the solid mold 2. At this time, the waste through-hole is split, so that the waste 19 falls from the waste through-hole, thereby realizing the automatic splitting of the waste through-hole.

[0049] Furthermore, a plurality of rollers 503 arranged in parallel are rotatably provided at the end of the first arc plate 501, and the plurality of rollers 503 abut against the right side surface of the movable mold 3, so as to achieve the abutment and cooperation between the end of the first arc plate 501 and the right side surface of the movable mold 3. By utilizing the rolling of the rollers 503, the friction between the first arc plate 501 and the right side surface of the movable mold 3 can be effectively reduced, thereby improving the smoothness of the downward movement of the rotating plate 5 and reducing the wear between the first arc plate 501 and the right side surface of the movable mold 3.

[0050] Furthermore, a leakage hole 102 corresponding to the waste through hole is opened on the top of the base 1, and the aperture of the leakage hole 102 is larger than the aperture of the waste through hole. When the waste through hole is disassembled, the waste 19 falls into the leakage hole 102 under the action of gravity. A collecting hole 103 connected with the leakage hole 102 is opened inside the base 1. After passing through the leakage hole 102, the waste 19 falls into the collecting hole 103 and is collected collectively.

[0051] A collection box 14 with an open top is slidably inserted into the collection hole 103 , so that the waste 19 enters the collection box 14 after passing through the leakage hole 102 , and the collected waste 19 can be cleaned out by pulling out the collection box 14 .

[0052] In this embodiment, a right baffle 8 is elastically slidably provided on the top of the movable mold 3, and a first rear baffle 801 is fixedly installed on the rear side of the right baffle 8. A left baffle 13 is fixedly installed on the top of the fixed mold 2, and a second rear baffle 1301 is fixedly installed on the rear side of the left baffle 13. The second rear baffle 1301 and the first rear baffle 801 are located in the same plane. The left baffle 13 and the right baffle 8 are used to fix the workpiece 18. In the initial state, the vertical distance between the left baffle 13 and the right baffle 8 is greater than the length of the workpiece 18 to facilitate the placement and removal of the workpiece 18. When punching the workpiece 18, first place the workpiece 18 between the left baffle 13 and the right baffle 8, and the rear side of the workpiece 18 abuts against the first rear baffle 801 and the second rear baffle 1301. Then, when the driving mechanism drives the upper mold to move downward to make the movable mold 3 slide toward the fixed mold 2, the movable mold 3 drives the right baffle 8 to move toward the workpiece 18 so that the right baffle 8 pushes the workpiece 18 to abut against the left baffle 13, thereby realizing the centering of the workpiece 18. Thereafter, the workpiece 18 is elastically clamped and fixed by the right baffle 8 and the left baffle 13, so that the punch 10 can stably punch the workpiece 18. It can be seen that the present invention can realize automatic fixation and automatic release of the workpiece 18 during the punching and resetting processes, respectively, and there is no need to fix the workpiece 18 in the vertical direction. In the prior art, when the workpiece 18 is fixed in the vertical direction, it is necessary to additionally set a stripper plate to enable the workpiece 18 to be separated from the punch. The present invention utilizes the clamping and fixing of the left baffle plate 13 and the right baffle plate 8, so that when the punch 10 moves upward, the workpiece 18 is still clamped and fixed, so that the punch 10 can be smoothly separated from the workpiece 18 without the need to additionally set a stripper plate.

[0053] In this embodiment, two second T-shaped slideways 301 arranged opposite to each other are provided on the top of the movable mold 3, and a third slide plate (not shown in the figure) corresponding to the two second T-shaped slideways 301 is fixedly installed on the bottom of the right baffle 8, and the third slide plate is slidably clamped in the second T-shaped slideway 301. An extrusion spring 9 is fixedly provided between the right side surface of the right baffle 8 and the movable mold 3, and under the elastic force of the extrusion spring 9, the elastic sliding of the right baffle 8 and the movable mold 3 is realized.

[0054] The opposing surfaces of the left baffle plate 13 and the right baffle plate 8 are concave surfaces, so that when the workpiece 18 is clamped, the bottom of the workpiece 18 can fit with the top surface of the lower mold without warping.

[0055] In this embodiment, the number of punches 10 can be set according to actual needs.

[0056] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A punching die, comprising a base (1), a lower die, an upper die and a driving mechanism for driving the upper die to move up and down, characterized in that: The lower mold comprises a fixed mold (2) and a movable mold (3) which are arranged opposite to each other, the fixed mold (2) is fixedly connected to the base (1), the movable mold (3) is slidably connected to the base (1), a left half hole (201) is formed on the right end surface of the fixed mold (2), and a right half hole (302) corresponding to the left half hole (201) is formed on the left end surface of the movable mold (3); The upper die and the movable die (3) are in abutment with each other, and the upper die moves downward to drive the movable die (3) and the fixed die (2) to fit together during the process of punching the workpiece (18), so that the left half hole (201) and the right half hole (302) are combined to form a complete waste through hole; During the upward movement of the upper mold, the movable mold (3) is driven to slide in a direction away from the fixed mold (2) so as to separate the left half hole (201) from the right half hole (302); An elastic support member is arranged on the solid mold (2), and the upper mold is rotatably arranged on the elastic support member. In the first half of the process of the upper mold moving downward, the upper mold performs a rotational movement to push the movable mold (3) to slide toward the solid mold (2) until the movable mold (3) and the solid mold (2) are in contact. In the second half of the process of the upper mold moving downward, the upper mold presses down the elastic support member to make the upper mold move downward vertically to achieve punching. The elastic support member comprises two guide plates (4) fixedly mounted on the fixed mold (2) and arranged opposite to each other, a guide groove is provided on the opposite surfaces of the two guide plates (4), a slider (17) is slidably arranged in the two guide grooves, a compression spring (15) is installed between the bottom of the guide groove and the bottom of the slider (17), a rod body (16) is rotatably arranged between the two sliders (17), and the upper mold is rotatably arranged on the rod body (16); The upper mold comprises a rotating plate (5) rotatably arranged on the rod body (16), a connecting block (6) being fixedly arranged on the rotating plate (5), a sliding groove (601) being provided on the connecting block (6), a cylindrical rod (701) being slidably engaged in the sliding groove (601), and a flange (7) being fixedly arranged on the cylindrical rod (701) and being detachably connected to the output end of the driving mechanism; One end of the rotating plate (5) is a first arc plate (501), the end of the first arc plate (501) is in abutment with the right side surface of the movable mold (3), and in the first half of the process when the driving mechanism drives the upper mold to move downward, the end of the first arc plate (501) pushes the right side surface of the movable mold (3) to make the movable mold (3) slide and fit with the fixed mold (2); An extension plate (11) is fixedly mounted on the movable mold (3); an end of the extension plate (11) away from the movable mold (3) slides through the solid mold (2) and is fixedly mounted with a vertical plate (12); the vertical plate (12) is slidably connected to the base (1); the other end of the rotating plate (5) is a second arc plate (502) abutting against the left side surface of the vertical plate (12); when the driving mechanism drives the upper mold to move upward, the end of the second arc plate (502) pushes the vertical plate (12) to slide rightward to drive the movable mold (3) to separate from the solid mold (2).

2. The punching die according to claim 1, characterized in that: The connection block (6) is detachably mounted with a punch (10), and in the second half of the process in which the driving mechanism drives the cylindrical rod (701) to move vertically downward, the punch (10) is in a vertical state and is coaxial with the waste material through hole.

3. The punching die according to claim 1, characterized in that: A plurality of rollers (503) arranged in parallel are rotatably provided at the end of the first arc plate (501), and the plurality of rollers (503) are in abutment with the right side surface of the movable mold (3).

4. The punching die according to claim 1, characterized in that: The top of the base (1) is provided with a leakage hole (102) corresponding to the waste material through hole, and the interior of the base (1) is provided with a collection hole (103) connected to the leakage hole (102).

5. The punching die according to claim 4, characterized in that: A collection box (14) with an open top is slidably inserted into the collection hole (103).

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