CN220970512U - Metal mold with adjustable blank pressing friction resistance mode - Google Patents

Abstract

The utility model discloses a metal mold with an adjustable blank pressing friction resistance mode, and belongs to the technical field of metal molds. The die comprises a support, a die shank, a lower die holder fixedly arranged at the top of the support, a female die fixedly arranged on the upper end face of the lower die holder, an upper die holder fixedly arranged at the bottom of the die shank, a base plate fixedly arranged at the bottom of the upper die holder, a male die which is arranged at the bottom of the base plate and is positioned right above the female die by adopting a locking plate, a guide column which is fixedly arranged on the upper die holder and the lower end of the male die slides through the lower die holder, a sheet pressing assembly for applying elastic pressure to a sheet in the drawing process, a resistance mode switching assembly for changing the relative motion resistance mode between the sheet pressing assembly and the sheet, and a discharging ejection assembly which is arranged in the female die in a sliding manner and is used for ejecting a workpiece in the female die upwards. The metal mold has the advantages of simple and reasonable structure, the function of switching the motion resistance mode of the formed sheet, and the application in deep drawing.

Description

Metal mold with adjustable blank pressing friction resistance mode

Technical Field

The utility model mainly relates to the technical field of metal molds, in particular to a metal mold with an adjustable blank pressing friction resistance mode.

Background

A metal mold having a drawing function is a mold widely used in the field of modern product manufacturing, which is capable of pre-pressing a plate before drawing a thin plate. The edge pressing device of the die in the prior art is usually an elastic edge pressing device and a rigid edge pressing device, wherein the pressure of the rigid edge pressing device is not adjustable, and the pressure of the elastic edge pressing device can be adjusted through the deformation of a spring. The sheet motion resistance mode is a sliding friction mode whether the sheet motion resistance mode is an elastic edge pressing mode or a rigid edge pressing mode. Therefore, although the prior art realizes the edge pressing function in the sheet drawing process, certain defects still exist: for example, for some softer sheet metal deep drawing, the resistance of the sliding friction mode is greater, which results in the product having defects such as tearing or wrinkling that affect the quality of the product. Therefore, it is necessary to design a metal mold that combines both rolling friction and sliding friction modes.

Disclosure of utility model

The technical problems to be solved by the utility model are as follows: aiming at the technical problems existing in the prior art, the utility model provides the metal mold which has the advantages of simple and reasonable structure, the function of switching the motion resistance mode of the formed plate and the capability of being used for deep drawing.

In order to solve the problems, the utility model provides the following solutions: the utility model provides a metal mold with adjustable blank pressing frictional resistance mode, includes support and die shank, still includes: the die comprises a lower die holder fixedly arranged at the top of the bracket, a female die fixedly arranged at the upper end face of the lower die holder, an upper die holder fixedly arranged at the bottom of the die shank, a base plate fixedly arranged at the bottom of the upper die holder, a male die which is arranged at the bottom of the base plate and is positioned right above the female die by adopting a locking plate, a guide column fixedly arranged on the upper die holder, the lower end of which slides through the lower die holder, a plate pressing assembly for applying elastic pressure to a thin plate in the drawing process, a resistance mode switching assembly for changing the relative movement resistance mode between the plate pressing assembly and the thin plate, and a discharging ejection assembly which is arranged in the female die in a sliding manner and is used for ejecting a workpiece in the female die upwards;

The sheet metal compacting assembly includes: a lifting plate elastically sliding and arranged on the upper die holder along the vertical direction, a rotating shaft A arranged at the lower end of the lifting plate in a horizontal direction, a lower press roller fixedly arranged on the rotating shaft A, a rotating shaft B arranged on the lower die holder in a horizontal direction by adopting a rotating shaft frame, and a supporting roller fixedly arranged on the rotating shaft B; the lower pressing roller is positioned right above the supporting roller;

The resistance mode switching assembly includes: a gear A fixedly arranged on the rotating shaft A, a gear B fixedly arranged on the rotating shaft B, an electric telescopic rod arranged on the lower die holder and axially along the vertical direction, a rack frame fixedly arranged at the movable end part of the electric telescopic rod, and a discontinuous rack fixedly arranged on the rack frame and capable of being meshed with the gear A and the gear B simultaneously or being separated from the gear A and the gear B simultaneously;

When the electric telescopic rod is in the longest state, the intermittent rack is meshed with the gear A and the gear B simultaneously after the lower pressing roller presses the thin plate placed on the supporting roller; when the electric telescopic rod is in the shortest state, after the lower pressing roller presses the thin plate placed on the supporting roller, the intermittent rack is disengaged from the gear A and the gear B.

Further, the discharge ejection assembly includes: the discharging device comprises a discharging plate arranged in the female die in a sliding manner along the vertical direction, a discharging rod and a discharging spring, wherein the discharging plate is fixedly arranged at the upper end of the discharging plate, the discharging rod passes through the lower die holder in a sliding manner, and is provided with a spring plate B, and the discharging spring is sleeved outside the discharging rod, and the two ends of the discharging spring are fixedly connected with the lower die holder and the spring plate B respectively.

Further, the intermittent rack sequentially comprises from top to bottom: toothless section A, meshing section A, toothless section B and meshing section B; the length of the toothless section B is smaller than the sum of the radius of the gear A, the radius of the gear B and the thickness of the thin plate; the length of the meshing section A is smaller than the sum of the radius of the gear A, the radius of the gear B and the thickness of the thin plate.

Further, the radius of the support roller is equal to that of the lower pressing roller, the radius of the gear A is equal to that of the gear B, and the radius of the gear A is smaller than that of the lower pressing roller.

Further, the top surface of the supporting roller is flush with the top surface of the female die.

Further, a spring plate A is fixedly arranged at the lower part of the lifting plate, the edge pressing spring is sleeved outside the lifting plate, and two ends of the edge pressing spring are respectively connected with the locking plate and the spring plate A.

Compared with the prior art, the utility model has the following advantages and beneficial effects: the metal mold with the adjustable blank pressing friction resistance mode is provided with the plate pressing assembly composed of parts such as the lower pressing roller, the supporting roller and the like, so that the periphery of a thin plate is tightly pressed in advance before the part of the thin plate is pulled into the female mold by the male mold, and the blank pressing force can be adjusted according to the deformation of the blank pressing spring; in addition, the utility model is also provided with a resistance mode switching component for changing the sheet motion resistance mode, when the electric telescopic rod drives the intermittent rack to move to the highest position, the gear A and the gear B are meshed with the intermittent rack and are locked, the lower press roller and the support roller can not rotate freely, and the sheet enters a sliding friction resistance mode; when the electric telescopic rod drives the intermittent rack to move to the lowest position, the gear A and the gear B are disengaged from the intermittent rack, the lower pressing roller and the supporting roller can rotate freely, and the thin plate enters a rolling friction resistance mode. Therefore, the metal mold has a simple and reasonable structure, has the function of switching the motion resistance mode of the formed sheet, and can be used for deep drawing.

Drawings

Fig. 1 is a schematic structural diagram of a metal mold with adjustable blank holding friction resistance mode according to the present utility model.

Fig. 2 is a schematic view of the structure of the intermittent rack in the present utility model.

Fig. 3 is a schematic diagram showing the relative positions of the support roller and the gear B on the rotating shaft B in the present utility model.

Fig. 4 is a schematic view showing the relative positions of the gear a and the gear B in the vertical direction in the present utility model.

In the figure, 11-a die shank; 12-an upper die holder; 13-backing plate; 14-a male die; 15-locking plate; 16-a locating pin; 21-a bracket; 22-a lower die holder; 23-a female die; 31-a guide post; 41-lifting plate; 42-edge pressing springs; 43-spring plate a; 44-a rotating shaft A; 45-pressing down the roller; 451-pressing down the front roller; 452-pressing down the rear roller; 46-a rotating shaft bracket; 47-a rotating shaft B; 48-a backup roll; 481-support front roller; 482-back-up roll; 51-intermittent rack; 511-toothless section a; 512-engagement section a;513—toothless section B;514—mesh segment B; 52-gear a; 53-gear B; 54-rack; 55-an electric telescopic rod; 61-a stripper plate; 62-a discharge rod; 63-a discharge spring; 64—spring plate B; 7-thin plate.

Detailed Description

The utility model will be described in further detail below with reference to the drawings and the specific examples. For convenience of description, the present description specifies: the upward movement direction of the upper die holder 12 is a positive Z-axis direction, a plane perpendicular to the Z-axis is a horizontal plane, a direction from left to right in the horizontal plane is a positive X-axis direction, and a direction from front to back in the horizontal plane is a positive Y-axis direction.

Referring to fig. 1, 3 and 4, the metal mold with adjustable edge pressing friction resistance mode of the utility model comprises a bracket 21, a mold shank 11, a lower mold seat 22 fixedly arranged at the top of the bracket 21, a female mold 23 fixedly arranged at the upper end surface of the lower mold seat 22, an upper mold seat 12 fixedly arranged at the bottom of the mold shank 11, a backing plate 13 fixedly arranged at the bottom of the upper mold seat 12, a male mold 14 which is arranged at the bottom of the backing plate 13 and is positioned right above the female mold 23 by adopting a locking plate 15, a guide column 31 fixedly arranged on the upper mold seat 12 and the lower end of the guide column slides through the lower mold seat 22, a sheet pressing component for applying elastic pressure to a sheet 7 in the drawing process, a resistance mode switching component for changing the relative movement resistance mode between the sheet pressing component and the sheet 7, and a discharging ejection component which is slidingly arranged in the female mold 23 and is used for ejecting a workpiece in the female mold 23 upwards. In the concrete implementation, a positioning pin 16 is arranged between the upper die holder 12 and the locking plate 15, so that the horizontal positioning of the male die 14 is realized; the number of the guide posts 31 is four, and the four guide posts 31 are symmetrically distributed with respect to the punch 14.

The sheet material compresses tightly the subassembly and includes: a lifting plate 41 elastically sliding in the vertical direction and installed on the upper die holder 12, a rotating shaft A44 rotating in the horizontal direction and installed at the lower end of the lifting plate 41, a lower press roller 45 fixedly installed on the rotating shaft A44, a rotating shaft B47 rotating in the horizontal direction and installed on the lower die holder 22 by a rotating shaft frame 46, and a supporting roller 48 fixedly installed on the rotating shaft B47; the lower press roller 45 is located directly above the support roller 48. Preferably, a spring plate A43 is fixedly arranged at the lower part of the lifting plate 41, the edge pressing spring 42 is sleeved outside the lifting plate 41, and two ends of the edge pressing spring are respectively connected with the locking plate 15 and the spring plate A43; the top surface of the support roller 48 is flush with the top surface of the female die 23. In specific implementation, as an embodiment one, the number of the plate pressing assemblies is two, and the two plate pressing assemblies are respectively positioned at the left side and the right side of the male die 14 and the female die 23, so that the rotating shaft A44 and the rotating shaft B47 are parallel to the Y axis; as a second embodiment, the number of the plate pressing assemblies is four, wherein two plate pressing assemblies are respectively positioned at the left side and the right side of the male die 14 and the female die 23, and the other two plate pressing assemblies are respectively positioned at the front side and the rear side of the male die 14 and the female die 23; the rotating shafts A44 and B47 in the plate compacting assemblies on the left side and the right side of the male die 14 are parallel to the Y axis, and the rotating shafts A44 and B47 on the front side and the rear side of the male die 14 are parallel to the X axis. When the edge pressing spring 42 is in a static balance position, the bottom of the lower pressing roller 45 is significantly lower than the bottom of the male die 14, so that the lower pressing roller 45 is abutted against the thin plate 7 before the male die 14; as an embodiment one, the pressing down roller 45 includes a pressing down front roller 451 and a pressing down rear roller 452 fixedly mounted on the rotation shaft a44, the pressing down front roller 451 and the pressing down rear roller 452 being symmetrical with respect to the lifting plate 41; the support roller 48 includes a support front roller 481 and a support rear roller 482 fixedly mounted on the rotation shaft B47, the support front roller 481 and the support rear roller 482 being symmetrical with respect to the rotation shaft frame 46; the geometry of the hold-down front roller 451, the hold-down rear roller 452, the support front roller 481, and the support rear roller 482 are all identical.

The resistance mode switching assembly includes: the gear A52 fixedly arranged on the rotating shaft A44, the gear B53 fixedly arranged on the rotating shaft B47, the electric telescopic rod 55 arranged on the lower die holder 22 and axially along the vertical direction, the rack frame 54 fixedly arranged on the movable end part of the electric telescopic rod 55, and the intermittent rack 51 fixedly arranged on the rack frame 54 and capable of being simultaneously meshed with or simultaneously separated from the gear A52 and the gear B53. In the specific implementation, as an embodiment one, the number of the plate pressing assemblies and the number of the resistance mode switching assemblies are two, and the two resistance mode switching assemblies correspond to the two plate pressing assemblies one by one; as a second embodiment, the number of the plate pressing assemblies and the number of the resistance mode switching assemblies are four, and the four resistance mode switching assemblies are in one-to-one correspondence with the four plate pressing assemblies; preferably, the radius of the gear a52 is equal to the radius of the gear B53, the radius of the support roller 48 is equal to the radius of the lower press roller 45, and the radius of the gear a52 is smaller than the radius of the lower press roller 45, so that after the lower press roller 45 and the support roller 48 collide with the sheet 7, the gear a52 and the gear B53 do not interfere with movement. Referring to fig. 2, preferably, the intermittent rack 51 includes, in order from top to bottom: toothless section a511, meshing section a512, toothless section B513, and meshing section B514; the length of the toothless section B513 is smaller than the sum of the radius of the gear A52, the radius of the gear B53 and the thickness of the thin plate 7; the length of the meshing section A512 is smaller than the sum of the radius of the gear A52, the radius of the gear B53 and the thickness of the thin plate 7. When the electric telescopic rod 55 is in the longest state, the lower pressing roller 45 presses the thin plate 7 placed on the supporting roller 48, the gear A52 and the gear B53 are respectively meshed with the meshing section A512 and the meshing section B514 in the intermittent rack 51, and the lower pressing roller 45 and the supporting roller 48 cannot freely rotate, so that when the thin plate 7 moves, the friction between the thin plate 7 and the lower pressing roller 45 and the friction between the thin plate 7 and the supporting roller 48 are sliding friction; when the electric telescopic rod 55 is in the shortest state, after the lower pressing roller 45 presses the thin plate 7 placed on the supporting roller 48, the gear A52 and the gear B53 are respectively adjacent to the toothless section A511 and the toothless section B513 in the intermittent rack 51, namely, the gear A52 and the gear B53 are in the non-meshing state, and the lower pressing roller 45 and the supporting roller 48 can freely rotate, so that when the thin plate 7 moves, the friction between the thin plate 7 and the lower pressing roller 45 and the supporting roller 48 is rolling friction.

Preferably, the discharge ejection assembly comprises: the stripper plate 61 is slidingly arranged in the female die 23 along the vertical direction, the upper end of the stripper plate 61 is fixedly arranged at the bottom of the stripper plate 61, the lower end of the stripper plate is slidingly penetrated through the lower die holder 22 and is provided with a stripper rod 62 of a spring plate B64, and the stripper spring 63 is sleeved outside the stripper rod 62, and the two ends of the stripper rod are fixedly connected with the lower die holder 22 and the spring plate B64 respectively. In the implementation, the number of the unloading rods 62 is two, and the two unloading rods 62 can enable the unloading plate 61 to be more stable when being reset upwards; the stripper spring 63 is a tensile coil spring, and in an initial state, the stripper plate 61 is positioned in the middle of the female die 23, and after the male die 14 and the female die 23 are assembled, the stripper plate 61 is positioned at the bottom of the female die 23; when the male die 14 enters the female die 23 to push the stripper plate 61 to move downwards, the stripper spring 63 stretches and deforms to store elastic potential energy; when the male die 14 withdraws from the female die 23, the discharge spring 63 releases elastic potential energy and pushes the discharge plate 61 to move upward for resetting.

The working principle of the resistance mode switching assembly is as follows: when the electric telescopic rod 55 drives the intermittent rack 51 to move upwards to the highest position, the gear B53 is meshed with the meshing section B514 in the intermittent rack 51, and as the length of the toothless section B513 is smaller than the sum of the radius of the gear A52, the radius of the gear B53 and the thickness of the thin plate 7, after the lower pressing roller 45 is abutted against the upper surface of the thin plate 7, the gear A52 is just meshed with the meshing section A512 in the intermittent rack 51, namely the gear A52 and the gear B53 are in a meshing and locking state, the lower pressing roller 45 and the supporting roller 48 cannot rotate, and the friction force between the thin plate 7 with the lower pressing roller 45 and the supporting roller 48 which are deformed in a moving way is sliding friction force; when the electric telescopic rod 55 drives the intermittent rack 51 to move downwards to the lowest position, the gear B53 is adjacent to the toothless section B513 in the intermittent rack 51, and since the length of the meshing section A512 is smaller than the sum of the radius of the gear A52, the radius of the gear B53 and the thickness of the thin plate 7, after the lower pressing roller 45 is abutted against the upper surface of the thin plate 7, the gear A52 is just adjacent to the toothless section A511 in the intermittent rack 51, namely, the gear A52 and the gear B53 are in a non-meshing state, the lower pressing roller 45 and the supporting roller 48 can rotate freely, and friction between the thin plate 7 subjected to movement deformation, the lower pressing roller 45 and the supporting roller 48 is rolling friction.

The working process of the utility model is as follows: a first step of appropriately selecting a frictional resistance mode of the thin plate 7 by adjusting the resistance mode switching means according to the material molding characteristics of the thin plate 7; if less friction is required, switching the sheet 7 to the rolling friction mode; if a large frictional resistance is required, the thin plate 7 is switched to the sliding frictional resistance mode; secondly, placing the thin plate 7 on the female die 23 and the supporting roller 48; thirdly, connecting the die shank 11 with a press, under the action of the press, driving the upper die holder 12 to move downwards by the die shank 11, firstly pressing the thin plate 7 by the lower pressing roll 45, and then continuously moving downwards by the male die 14 to press the corresponding part of the thin plate 7 into the female die 23 for deep drawing; fourth, after deep drawing, the die shank 11 drives the upper die holder 12 and the male die 14 to move upwards, and the unloading spring 63 in the unloading ejection assembly releases elastic potential energy, so that the workpiece is pushed upwards through the unloading plate 61, and the workpiece is taken out.

The above is merely a specific embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions that do not undergo the inventive work should fall within the scope of the present utility model.

Claims (6)

1. The metal mold with adjustable blank pressing friction resistance mode comprises a bracket (21) and a mold handle (11), and is characterized by further comprising: the die comprises a lower die holder (22) fixedly arranged at the top of a bracket (21), a female die (23) fixedly arranged at the upper end surface of the lower die holder (22), an upper die holder (12) fixedly arranged at the bottom of a die handle (11), a base plate (13) fixedly arranged at the bottom of the upper die holder (12), a male die (14) which is arranged at the bottom of the base plate (13) and is positioned right above the female die (23) by adopting a locking plate (15), a guide column (31) fixedly arranged on the upper die holder (12) and the lower end of which slides through the lower die holder (22), a plate pressing component for applying elastic pressure to a thin plate (7) in the drawing process, a resistance mode switching component for changing a relative motion resistance mode between the plate pressing component and the thin plate (7), and a discharging and ejecting component which is arranged in the female die (23) in a sliding manner and is used for ejecting a workpiece in the female die (23) upwards;

the sheet metal compacting assembly includes: a lifting plate (41) which is elastically and slidably arranged on the upper die holder (12) along the vertical direction, a rotating shaft A (44) which is arranged at the lower end of the lifting plate (41) along the horizontal direction, a lower pressing roller (45) which is fixedly arranged on the rotating shaft A (44), a rotating shaft B (47) which is arranged on the lower die holder (22) along the horizontal direction by adopting a rotating shaft bracket (46), and a supporting roller (48) which is fixedly arranged on the rotating shaft B (47); the lower pressing roller (45) is positioned right above the supporting roller (48);

The resistance mode switching assembly includes: a gear A (52) fixedly arranged on the rotating shaft A (44), a gear B (53) fixedly arranged on the rotating shaft B (47), an electric telescopic rod (55) arranged on the lower die holder (22) and axially along the vertical direction, a rack frame (54) fixedly arranged at the movable end part of the electric telescopic rod (55), and a discontinuous rack (51) fixedly arranged on the rack frame (54) and capable of being simultaneously meshed with or simultaneously separated from the gear A (52) and the gear B (53);

When the electric telescopic rod (55) is in the longest state, the intermittent rack (51) is meshed with the gear A (52) and the gear B (53) simultaneously after the lower pressing roller (45) presses the thin plate (7) placed on the supporting roller (48); when the electric telescopic rod (55) is in the shortest state, after the lower pressing roller (45) presses the thin plate (7) placed on the supporting roller (48), the intermittent rack (51) is disengaged from the gear A (52) and the gear B (53).

2. The adjustable binder friction mode metal mold of claim 1 wherein the stripper ejector assembly comprises: the discharging device comprises a discharging plate (61) arranged in the female die (23) in a sliding manner along the vertical direction, a discharging rod (62) and a discharging spring (63), wherein the discharging plate (61) is fixedly arranged at the upper end of the discharging plate (61) and penetrates through the lower die holder (22) in a sliding manner, the discharging rod is provided with a spring plate B (64), and the discharging spring (63) is sleeved outside the discharging rod (62) and is fixedly connected with the lower die holder (22) and the spring plate B (64) at two ends of the discharging spring respectively.

3. The metal mold with adjustable blank holding friction resistance mode according to claim 1, wherein the intermittent rack (51) comprises, in order from top to bottom: toothless section A (511), meshing section A (512), toothless section B (513) and meshing section B (514); the length of the toothless section B (513) is smaller than the sum of the radius of the gear A (52), the radius of the gear B (53) and the thickness of the thin plate (7); the length of the meshing section A (512) is smaller than the sum of the radius of the gear A (52), the radius of the gear B (53) and the thickness of the thin plate (7).

4. The die of claim 1, wherein the support roller (48) and the lower roller (45) have equal radii, the gear a (52) has equal radii and the gear B (53) has a radius, and the gear a (52) has a radius smaller than the radius of the lower roller (45).

5. A die as claimed in claim 1, wherein the top surface of the support roller (48) is flush with the top surface of the die (23).

6. The metal mold with adjustable blank pressing friction resistance mode according to claim 1, wherein a spring plate a (43) is fixedly arranged at the lower part of the lifting plate (41), a blank pressing spring (42) is sleeved outside the lifting plate (41), and two ends of the blank pressing spring are respectively connected with the locking plate (15) and the spring plate a (43).