CN111745011A

CN111745011A - Pressure maintaining mechanism for stamping die

Info

Publication number: CN111745011A
Application number: CN202010486623.XA
Authority: CN
Inventors: 郑冬青
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-10-09

Abstract

The invention discloses a pressure maintaining mechanism for a stamping die, which is characterized in that: including the fixed axle, the hollow motor, the driving piece, rotate the piece, connecting rod and spacing jar, it includes a carousel and sets up the dwang on the carousel to rotate the piece, dwang outer end and connecting rod upper end are articulated, the lower extreme of connecting rod is used for with the articulated movable mould up-and-down motion that promotes of movable mould, first transmission groove and second transmission groove have been seted up on the periphery wall of carousel, relative division is equipped with first spacing groove and second spacing groove on the internal perisporium of carousel, be provided with a slip chamber on the driving piece, it is provided with the transmission piece to slide in the slip chamber, tip at the fixed axle is provided with spacing jar, the output of spacing jar is provided with the cutting, the cutting slides and sets up and is used for promoting the stopper in the insertion groove. The invention provides a pressure maintaining mechanism for a stamping die, which can be used for shaping a stamping part in the stamping process, maintaining pressure and cooling, and improving the stamping quality of the stamping part.

Description

Pressure maintaining mechanism for stamping die

Technical Field

The invention relates to the field of stamping, in particular to a pressure maintaining mechanism for a stamping die.

Background

In production and life, many products are formed by stamping metal sheets (metal plates with the thickness less than 2 mm). In the process of stamping the thin plate, an upper die and a lower die of stamping equipment are needed to stamp the plate into a specific shape, and then the stamped plate is taken out. In the prior art, in the stamping process of the thin plate, the upper die and the lower die are separated immediately after the thin plate is stamped, and due to the fact that the thin plate can generate strain force in all directions in the stamping deformation process, and the thickness of the thin plate is small, certain deformation can be generated under the action of the strain force, and the quality of a product is seriously influenced.

For example, chinese utility model publication No. CN210026440U discloses "a pressure maintaining mechanism", which includes a frame, and the following components mounted on the frame: the holding mechanism is used for clamping a workpiece and comprises at least two clamping parts and a first driver used for driving the clamping parts to clamp or loosen, the clamping parts are L-shaped, and the end parts of the clamping parts are provided with concave parts matched with the workpiece; the stamping mechanism is used for stamping a workpiece and comprises a stamping device arranged between the two clamping parts, and the stamping device is connected with the retaining mechanism; the lifting mechanism is used for driving the holding mechanism to do lifting motion on the rack and comprises a sliding rail fixedly arranged on the rack, the holding mechanism is slidably arranged on the sliding rail, and a second driver connected with the holding mechanism is further arranged on the rack.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a pressure maintaining mechanism for a stamping die, which can shape a stamping part in the stamping process, maintain pressure and cool the stamping part and improve the stamping quality of the stamping part, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a pressurize mechanism for stamping die which characterized in that: the device comprises a fixed shaft, a hollow motor, a driving part, a rotating part, a connecting rod and a limiting cylinder, wherein the hollow motor penetrates through the fixed shaft and is connected with the driving part, the rotating part and the driving part are respectively arranged on the fixed shaft in a rotating way, an installation space for installing the rotating part is arranged on the driving part, the rotating part comprises a turntable and a rotating rod arranged on the turntable, the outer end of the rotating rod is hinged with the upper end of the connecting rod, the lower end of the connecting rod is used for being hinged with a movable mold to push the movable mold to move up and down, a first transmission groove and a second transmission groove are arranged on the outer peripheral wall of the turntable, a first limiting groove and a second limiting groove are oppositely arranged on the inner peripheral wall of the turntable, a sliding cavity is arranged on the driving part, a transmission block is arranged in the sliding cavity in a sliding way, a transmission pin penetrating through, the driving part is provided with a pulling motor, a pull rope is wound on the output end of the pulling motor, the pull rope penetrates through a sliding cavity and is connected with the transmission block, an insertion groove is axially formed in the end part of the fixed shaft, a limiting sliding hole communicated with the insertion groove is formed in the bottom of the insertion groove, a limiting block used for being inserted into the first limiting groove or the second limiting groove is arranged in the limiting sliding hole in a sliding mode, a limiting cylinder is arranged at the end part of the fixed shaft, an insertion strip is arranged at the output end of the limiting cylinder, the insertion strip is arranged in the insertion groove in a sliding mode and used for pushing the limiting block to be inserted into the first limiting groove or the second limiting groove.

As an improvement, a balancing weight with the same weight as the pulling motor is arranged on the driving piece, and the output end of the pulling motor is rotatably arranged on the balancing weight.

And the side surface of the limiting block, which is opposite to the inserting strip, is provided with an inclined plane, and the end surface of the inserting strip, which is opposite to the limiting block, is provided with an inclined plane with the same inclination angle as the inclined plane.

And the limiting sliding holes are obliquely arranged.

And the rotating part is provided with a ratchet wheel concentric with the fixed shaft, the rotating rod is provided with a pawl, the rotating rod is provided with an elastic sheet for pressing the pawl onto the ratchet wheel, and the ratchet wheel drives the rotating rod to synchronously rotate through the pawl along with the rotation of the rotating part.

And the rotating part and the movable die are arranged in a centering manner or an eccentric manner.

Compared with the prior art, the invention has the advantages that: the hollow motor drives the driving part to rotate, the driving part rotates at the periphery of the rotating part at a constant speed, the connecting rod is hinged with the rotating rod on the rotating part, the rotating part is equivalent to an eccentric wheel which drives the movable die to move through the connecting rod, the movable die has three movement forms, the first movement form is a downward movement process of the movable die, at the moment, the motor is pulled to lose acting force on the pull rope, under the action of the compression spring, a transmission pin on the transmission block is inserted into a transmission groove on the rotary table, a limiting block in the fixed shaft is hidden in a limiting sliding hole, the driving part is linked with the rotating part, and the movable die realizes stamping on; in the second motion mode, the movable die is tightly pressed on the bottom die and keeps a static state, at the moment, a piston rod of the limiting cylinder extends out, the inserting strip in the fixed shaft pushes the limiting block to move outwards, the limiting block is inserted into a transmission groove of the rotating part, the rotating part and the fixed shaft are connected into a whole, meanwhile, the pulling motor rotates, the pull rope is wound on a rotating shaft of the pulling motor, the compression spring is compressed, the transmission block moves towards the sliding cavity, the transmission pin leaves the transmission groove of the rotating part, the driving part loses transmission force to the rotating part, and in the process, the movable die shapes the stamping part and performs pressure maintaining cooling, so that the stamping quality of the stamping part is improved; and in the third motion state, the movable die moves upwards, the movable die leaves the bottom die, at the moment, the electromagnet in the cutting strip is electrified to generate magnetic field force on the permanent magnet in the limiting block, the limiting block leaves the limiting groove of the fixed shaft and retracts into the fixed shaft, the driving pin on the driving piece is inserted into the driving groove of the rotating piece, and the driving piece and the rotating piece are linked. The invention adopts the structural form of the driving part and the rotating part, so that the pressure maintaining and cooling stage is realized in the stamping process, and the stamping quality of the stamping part is improved.

Drawings

FIG. 1 is a schematic structural view of a pressure maintaining mechanism for a press mold according to an embodiment of the present invention;

fig. 2 is a sectional view of a pressure holding mechanism for a press die in an embodiment of the invention;

FIG. 3 is a schematic view of the pressure retention mechanism of FIG. 2 in another position of movement;

FIG. 4a is a schematic diagram (one) illustrating the movement of the link rod driven by the pressure maintaining mechanism according to the embodiment of the present invention;

FIG. 4b is a schematic diagram (two) illustrating the movement of the link rod driven by the pressure maintaining mechanism according to the embodiment of the present invention;

FIG. 4c is a schematic diagram (III) illustrating the movement of the link rod driven by the pressure maintaining mechanism according to the embodiment of the present invention;

FIG. 5 is a cross-sectional view of the ratchet wheel on the rotating member in an embodiment of the present invention;

FIG. 6 is a schematic view showing the movement of the rotating member and the moving mold in an eccentric configuration according to the embodiment of the present invention;

fig. 7 is a schematic movement diagram of the rotating member and the moving mold in a concentric structure according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 7, the pressure maintaining mechanism for a press die in the present embodiment includes a fixed shaft 1, a hollow motor 2, a driving member 3, a rotating member 4, a connecting rod 45, and a limit cylinder 6.

Wherein, the hollow motor 2 passes through the fixed shaft 1 to be connected with the driving part 3, the rotating part 4 and the driving part 3 are respectively rotatably arranged on the fixed shaft 1, the driving part 3 is provided with an installation space 301 for installing the rotating part 4, the rotating part 4 comprises a turntable 401 and a rotating rod 402 arranged on the turntable 401, the outer end of the rotating rod 402 is hinged with the upper end of the connecting rod 45, the lower end of the connecting rod 45 is used for being hinged with the movable mold 101 to push the movable mold 101 to move up and down, the outer peripheral wall of the turntable 401 is provided with a first transmission groove 41 and a second transmission groove 42, the inner peripheral wall of the turntable 401 is provided with a first limiting groove 43 and a second limiting groove 44 in a split way, the driving part 3 is provided with a sliding cavity 31, the sliding cavity 31 is internally provided with a transmission block 32 in a sliding way, the transmission block 32 is extended with a transmission pin 3231 which passes through the driving part 3 and is used for being inserted, the driving part 3 is provided with a pulling motor 7, the output end of the pulling motor 7 is wound with a pulling rope 71, the pulling rope 71 passes through the sliding cavity 31 and is connected with the transmission block 32, the end part of the fixed shaft 1 is axially provided with an insertion groove 63, the bottom of the insertion groove 63 is provided with a limiting sliding hole communicated with the insertion groove 63, a limiting block 5 for being inserted into the first limiting groove 43 or the second limiting groove 44 is arranged in the limiting sliding hole in a sliding way, the end part of the fixed shaft 1 is provided with a limiting cylinder 6, the output end of the limiting cylinder 6 is provided with an inserting strip 61, the inserting strip 61 is arranged in the insertion groove 63 in a sliding way and is used for pushing the limiting block 5 to be inserted into the first limiting groove 43 or the second limiting groove 44, a permanent magnet 51 is arranged in the limiting block 5, an electromagnet 62 is arranged in the inserting strip 61, furthermore, the side surface of the limiting block 5 opposite to the inserting strip 61 is provided with an, meanwhile, the limiting sliding holes are obliquely arranged.

Since the driving member 3 is in a state of always rotating, it is preferable that the driving member 3 is in a symmetrical structure, for example, a weight block 72 having the same weight as that of the pulling motor 7 is provided on the driving member 3, and the output end of the pulling motor 7 is rotatably provided above the weight block 72.

In addition, in the embodiment of the present invention, as shown in fig. 4a to 4c, on the rotating member, the angle α in fig. 4a is an included angle between the center line of the rotating member and a connecting line from the first transmission groove 41 to the center of the rotating member 4. Meanwhile, within the 360-degree position range of the uniform rotation of the driving part 3, in three different working stages of die assembly of the movable die 101, pressure maintaining of the movable die 101 and die opening of the movable die 101, the rotating part 4 corresponds to different ranges of rotation radian at the same time, for example, in the die assembly stage of the movable die 101, the rotating part 4 drives the movable die 101 to move downwards through the connecting rod 45, and the rotating angle of the rotating part in the process is assumed to be a transmission angle, because the action position of the transmission pin 321 on the driving part 3 on the rotating part 4 can be any position on the circumference of the rotating part 4, and the transmission angle is at any position in the vertical rotation plane of the rotating part 402, namely, in the upward rotation process of the rotating part 4 or in the downward rotation process of the rotating part 4, the downward movement of the movable die 101 can be realized, and the position on the circumference.

Therefore, in order to change the magnitude of the angle α, in the embodiment of the present invention, the rotating member 4 is formed with a ratchet 403 concentric with the fixed shaft 1, the rotating rod 402 is provided with a pawl 405, the rotating rod 402 is provided with a spring 404 for pressing the pawl 405 onto the ratchet 403, and the ratchet 403 drives the rotating rod 402 to rotate synchronously through the pawl 405 as the rotating member 4 rotates, as shown in fig. 5. In order to change the range of the angle α in fig. 4a, the elastic piece 404 is pulled, the rotating member 4 is rotated, and after the position is adjusted, the elastic piece 404 is released again.

Further, in the present invention, the rotating member 4 and the movable mold 101 are arranged in a concentric manner or in an eccentric manner. The eccentric structure is shown in fig. 6, and it is assumed that the distance from the rotation center of the rotating member 4 to the center line of the guide path of the moving movable mold 101 is an offset e, the movement locus of the movable mold 101 is a guide path H, the included angle between the two extreme positions of the rotating lever 402 is a polar included angle θ, and the movable mold 101 is closedIn the process, the rotating lever 402 has a rotating angle of (180+ θ)⁰I.e. β angle range in fig. 6, correspondingly, since the rotating rod 402 is driven by the rotating member 4, the rotating member 4 is driven by the transmission pin 321 of the driving member 3 acting on the transmission groove on the rotating member 4, and the arc range of rotation of the rotating member 4 driven by the driving member 3 is actually the rotation angle range corresponding to the α angle continued to rotate around the rotation center in the whole β angle range in fig. 6, in other words, the hinge point B between the rotating rod 402 and the connecting rod 45 is changed to the position corresponding to the α angle of the rotating rod 402 without changing the moving track of the movable mold 101 and the length of the rotating rod 402 and the connecting rod 45, and the rotation angle range of the rotating rod 402 is (180-theta) during the mold opening process of the movable mold 101⁰Correspondingly, the actual rotation arc range of the rotor 4 also needs a corresponding rotation angle range after α degrees of rotation.

The concentric structure is shown in fig. 7, in which the offset e is zero and the polar angle θ is also zero, and the range of the rotation radian of the rotating member 4 corresponding to each movement process of the movable mold 101 is substantially the same as described above.

The hollow motor 2 drives the driving part 3 to rotate around the fixed shaft 1 at a constant speed, the driving pin 321 is inserted into the first driving groove 41 of the rotating part 4 under the action of the pressing spring 33, and the rotating part 4 drives the connecting rod 45 to move to push the movable mold 101 to move downwards, so that the mold assembly of the movable mold 101 is realized; the limiting cylinder 6 extends out, the cutting strip 61 pushes the limiting block 5 to be inserted into the first limiting groove 43 of the rotating piece 4, meanwhile, the motor 7 is pulled to rotate, the pull rope 71 drives the transmission block 32 to be far away from the rotating piece 4, at the moment, the rotating piece 4 cannot be driven to synchronously rotate by the rotation of the driving piece 3, the pressure maintaining on the profile surface of the workpiece is realized, and the damage to the workpiece caused by punching holes is reduced; when the rotating member 4 rotates by 180-theta degrees, the motor 7 is pulled to rotate, under the action of the compression spring 33, the driving pin 321 on the driving block 32 is inserted into the first driving groove 41, the limiting cylinder 6 is reset, the electromagnet 62 is powered on, magnetic field force is generated on the permanent magnet 51 in the limiting block 5, the limiting block 5 is separated from the first limiting groove 43 and retracts into the fixed shaft 1, the movable die 101 is far away from the bottom die 102, unloading and reloading of a workpiece are achieved, and the next punching process is started.

Specifically, for the positional relationship between the rotating member 4 and the movable die 101 provided in the concentric structure, the punching process includes the following steps: firstly, the cutting slips 61 on the limiting cylinder 6 push the limiting blocks 5 in the fixed shaft 1 to be inserted into the second limiting grooves 44 of the rotating parts 4, the rotating parts 4 and the fixed shaft 1 are connected into a whole, the motor 7 is pulled to tighten the driving block 32 through the pull rope 71, the driving pins 321 on the driving block 32 leave the second driving grooves 42, the rotation of the hollow motor 2 cannot be transmitted to the upper parts of the rotating parts 4 through the driving parts 3, the rotating parts 4 are in a static state, the movable die 101 is in a position far away from the bottom die 102, and a workpiece to be punched is placed on the bottom die 102; step two, the hollow motor 2 drives the driving part 3 to continuously rotate 180 degrees at a constant speed around the fixed shaft 1, the motor 7 is pulled to lose acting force on the pull rope 71, under the action of the compression spring 33, the driving pin 321 on the driving block 32 is inserted into the first driving groove 41 of the rotating part 4, the limiting cylinder 6 is reset, the electromagnet 62 in the inserting strip 61 is electrified, the limiting block 5 is adsorbed into the fixed shaft 1, the outer end part of the rotating rod 402 on the rotating part 4 rotates 180 degrees counterclockwise from the highest point to the lowest point, the rotating part 4 drives the connecting rod 45 to move to push the movable die 101 to move downwards, and the movable die 101 and the bottom die 102 are; thirdly, the piston rod of the limiting cylinder 6 extends out again, the inserting bar 61 on the limiting cylinder 6 pushes the limiting block 5 in the fixed shaft 1 to be inserted into the first limiting groove 41 of the rotating part 4, the rotating part 4 and the fixed shaft 1 are connected into a whole and keep a static state, meanwhile, the pulling motor 7 on the driving part 3 rotates, the pull rope 71 drives the transmission block 32 in the driving part 3 to slide towards the direction far away from the rotating part 4, in the process, the driving part 3 continues to rotate 180 degrees in the same direction, the driving part 3 and the rotating part 4 move and are separated, and pressure maintaining is carried out on the molded surface of the workpiece; step four, after the rotating member 4 rotates 180 degrees, the motor 7 is pulled to lose the acting force on the pull rope 71 again, under the action of the compression spring 33, the transmission pin 321 on the transmission block 32 is inserted into the second transmission groove 42, meanwhile, the limiting cylinder 6 is reset, the electromagnet 62 is electrified to generate magnetic field force on the permanent magnet 51 in the limiting block 5, so that the limiting block 5 leaves the first limiting groove 43 and retracts into the fixed shaft 1, the movable die 101 is far away from the bottom die 102, and unloading of the punched workpiece is realized; and step five, repeating the steps S1 to S4 to realize the automatic continuous stamping of the workpiece.

To sum up, the hollow motor 2 of the present invention drives the driving part 3 to rotate, the driving part 3 rotates at a constant speed at the periphery of the rotating part 4, the connecting rod 45 is hinged with the rotating rod 402 on the rotating part 4, the rotating part 4 is equivalent to an eccentric wheel and drives the movable die 101 to move through the connecting rod 45, the movable die 101 has three movement forms, the first movement form is that, in the downward movement process of the movable die 101, at this time, the pulling motor 7 loses the acting force on the pulling rope 71, under the action of the hold-down spring 33, the driving pin 321 on the driving block 32 is inserted into the driving groove on the rotating disc 4, the limit block 5 in the fixed shaft 1 is hidden in the limit sliding hole, the driving part 3 and the rotating part 4 are linked; in the second motion mode, the movable die 101 is pressed on the bottom die 102 and kept in a static state, at the moment, a piston rod of the limiting cylinder 6 extends out, the insert 61 in the fixed shaft 1 pushes the limiting block 5 to move outwards, the limiting block 5 is inserted into the transmission groove 63 of the rotating part, the rotating part 4 and the fixed shaft 1 are connected into a whole, meanwhile, the pulling motor 7 rotates, the pull rope 71 is wound on the rotating shaft of the pulling motor 7, the pressing spring 33 is compressed, the transmission block 32 moves towards the sliding cavity 31, the transmission pin 321 leaves the transmission groove of the rotating part 4, the driving part 3 loses transmission force on the transmission part 4, and in the process, the movable die 101 shapes the stamping part and performs pressure maintaining cooling, so that the stamping quality of the stamping part is improved; in the third movement mode, the movable die 101 moves upwards, the movable die 101 leaves the bottom die 102, at this time, the electromagnet 62 in the insert 61 is powered on to generate magnetic field force on the permanent magnet 51 in the limiting block 5, the limiting block 5 leaves the limiting groove of the fixed shaft 1 and retracts into the fixed shaft 1, the transmission pin 321 on the driving part 3 is inserted into the transmission groove of the rotating part 3, and the driving part 3 and the rotating part 4 are linked. The invention adopts the structural form of the driving part 3 and the rotating part 4, so that a pressure maintaining cooling stage is provided in the stamping process, and the stamping quality of the stamping part is improved.

Claims

1. The utility model provides a pressurize mechanism for stamping die which characterized in that: comprises a fixed shaft (1), a hollow motor (2), a driving part (3), a rotating part (4), a connecting rod (45) and a limiting cylinder (6), wherein the hollow motor (2) penetrates through the fixed shaft (1) to be connected with the driving part (3), the rotating part (4) and the driving part (3) are respectively and rotatably arranged on the fixed shaft (1), an installation space (301) for installing the rotating part (4) is formed in the driving part (3), the rotating part (4) comprises a turntable (401) and a rotating rod (402) arranged on the turntable (401), the outer end of the rotating rod (402) is hinged with the upper end of the connecting rod (45), the lower end of the connecting rod (45) is used for being hinged with a movable mold (101) to push the movable mold (101) to move up and down, a first transmission groove (41) and a second transmission groove (42) are formed in the outer peripheral wall of the turntable (401), a first limiting groove (43) and a second limiting groove (44, a sliding cavity (31) is arranged on the driving part (3), a driving block (32) is arranged in the sliding cavity (31) in a sliding mode, a driving pin (321) which penetrates through the driving part (3) and is used for being inserted into the first driving groove (41) or the second driving groove (42) extends from the driving block (32), a compression spring (33) which is abutted against the driving block (32) is arranged in the sliding cavity (31), a pulling motor (7) is arranged on the driving part (3), a pulling rope (71) is wound on the output end of the pulling motor (7), the pulling rope (71) penetrates through the sliding cavity (31) and is connected with the driving block (32), an insertion groove (63) is axially formed in the end part of the fixed shaft (1), a limiting sliding hole which is communicated with the insertion groove (63) is formed in the bottom of the insertion groove (63), a limiting block (5) which is used for being inserted into the first limiting groove (43) or the second limiting groove (44), the end part of the fixed shaft (1) is provided with a limiting cylinder (6), the output end of the limiting cylinder (6) is provided with an inserting strip (61), the inserting strip (61) is arranged in an inserting groove (63) in a sliding mode and used for pushing the limiting block (5) to be inserted into the first limiting groove (43) or the second limiting groove (44), a permanent magnet (51) is arranged in the limiting block (5), and an electromagnet (62) is arranged in the inserting strip (61).

2. The pressure holding mechanism for a press die according to claim 1, characterized in that: the driving piece (3) is provided with a balancing weight (72) with the same weight as the pulling motor (7), and the output end of the pulling motor (7) is rotatably arranged on the balancing weight (72).

3. The pressure holding mechanism for a press die according to claim 1, characterized in that: an inclined plane is formed on the side face, opposite to the inserting strip (61), of the limiting block (5), and an inclined plane with the same inclination angle as the inclined plane is arranged on the end face, opposite to the limiting block (5), of the inserting strip (61).

4. The pressure holding mechanism for a press die according to claim 3, characterized in that: the limiting sliding holes are obliquely arranged.

5. The pressure holding mechanism for a press die according to claim 1, characterized in that: rotate and be formed with ratchet (403) concentric with fixed axle (1) on piece (4) dwang (4) are provided with a pawl (405), are provided with one on dwang (402) and compress tightly shell fragment (404) on ratchet (403) pawl (405), and along with the rotation of rotating piece (4), ratchet (403) drive dwang (402) synchronous rotation through pawl (405).

6. The pressure holding mechanism for a press die according to claim 1, characterized in that: the rotating piece (4) and the moving die (101) are arranged in a centering manner or in an eccentric manner.