CN113070407A

CN113070407A - Die floating device

Info

Publication number: CN113070407A
Application number: CN202110433529.2A
Authority: CN
Inventors: 华萍萍; 樊庆军; 杨均栋; 唐海琪; 黄长亮
Original assignee: Liuzhou Wuling Automobile Industry Co Ltd; Guangxi Automobile Group Co Ltd
Current assignee: Liuzhou Wuling Automobile Industry Co Ltd; Liuzhou Wuling Motors Co Ltd; Guangxi Automobile Group Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-07-06

Abstract

The invention discloses a mold floating device, which comprises a mold and at least one group of floating units, wherein each floating unit comprises a floating block and at least one elastic piece; under the first state, the floating block extends out of the mounting groove for a certain height, and under the second state, the floating block is pressed and descended to compress the elastic piece, and the floating block retracts into the mounting groove. The floating block can ensure the contact area with a workpiece, the workpiece is not easy to deviate in the jacking process, and the precision requirement of mechanical arm grabbing is met. In addition, the jacking is realized through the elasticity of elastic component, and elasticity is comparatively stable, and the release of power is comparatively even, at the in-process of jacking from the machined part and after ejecting, is difficult to cause the machined part to rock, drop.

Description

Die floating device

Technical Field

The invention relates to the technical field of product processing, in particular to a die floating device.

Background

As shown in fig. 1, fig. 1 is a schematic view of a lower mold for manufacturing a front side member of a vehicle.

The lower die comprises a lower die base 1 'and a lower die insert 2' arranged on the lower die base 1 ', the lower die insert 2' is matched with the shape of the car beam to be formed, the material to be processed is arranged in the lower die insert 2 ', and after the punching process is finished, the material to be processed can be attached to the lower die insert 2' to form a machined part of the front beam.

In demolding, in order to facilitate workers to take away workpieces, a material ejecting device is arranged in a lower die insert 2 'in fig. 1 and comprises a top rod 3' and a cylinder 4 'for driving the top rod 3' to act. When the stamping process is carried out, the ejector rods 3 'are all positioned in the lower die insert 2', and when the machined part needs to be taken away after stamping is finished, the air cylinder 4 'drives the ejector rods 3' to extend out of the top of the lower die insert 2 'so as to push the machined part away from the lower die insert 2', and therefore workers can take away the machined part conveniently.

Along with the development of automation, the machined part that forms after finishing waiting to process the material punching press is snatched by the manipulator, nevertheless because the restriction of workshop electric air source, the jacking force of cylinder 4 ' is limited, ejector pin 3 ' is thinner, ejector pin 3 ' and machined part area of contact are less, the support to the machined part is unstable when the top is from, the predetermined position of snatching of manipulator is deviated very easily, and, the drive power of cylinder 4 ' receives the influence of atmospheric pressure great, the thrust that leads to ejector pin 3 ' to promote the machined part is unstable, the machined part appears rocking easily and drops even, be not convenient for snatching of manipulator. Therefore, the ejection device has unstable potential safety hazards in the process of ejecting the workpiece and after ejection, the success rate of grabbing the workpiece by the manipulator is seriously influenced, the production efficiency is reduced, and the risk of production accidents is increased.

Disclosure of Invention

The invention provides a mold floating device, which comprises a mold and at least one group of floating units, wherein each floating unit comprises a floating block and at least one elastic piece; under the first state, the floating block extends out of the mounting groove for a certain height, and under the second state, the floating block is pressed and descended to compress the elastic piece, and the floating block retracts into the mounting groove.

Optionally, the floating unit is provided with a limiting structure for limiting the height of the floating block extending out of the mounting groove.

Optionally, the floating block is provided with at least one limiting hole penetrating through the floating block along the lifting direction of the floating block, and the hole wall of the limiting hole forms a first step surface; the limiting structure is a limiting rod, the limiting rod is inserted into the limiting hole, one end of the limiting rod is fixed in the mounting groove, and the other end of the limiting rod can be abutted with the first step surface to limit the extending height of the floating block.

Optionally, the limiting rod is a limiting bolt, and the limiting bolt is in threaded connection with the bottom of the mounting groove.

Optionally, a gap is formed between at least part of the hole section of the limiting hole and the limiting rod; the floating unit further comprises a sliding sleeve which is sleeved outside the limiting rod, the length of the sliding sleeve is smaller than that of the limiting rod, and when the floating unit is in a first state, the sliding sleeve is partially positioned in the gap between the limiting hole and the limiting rod.

Optionally, the die comprises a lower die base and a lower die insert arranged on the lower die base to match with a workpiece, and the mounting groove is arranged at the top of the lower die insert.

Optionally, the floating unit further includes a sensor mounted on the floating block, and the sensor can detect the material to be processed after the material to be processed is placed in the mold and is placed in place.

Optionally, the slider is provided with a mounting hole, the sensor is inserted into the mounting hole, and the sensing end of the sensor is exposed out of the mounting hole or the sensor is completely located in the mounting hole.

Optionally, the floating unit further includes a fixing plate, the sensing end of the sensor is fixed to the fixing plate, and the fixing plate is fixed to the top of the floating block.

Optionally, the middle part of the top of the floating block is sunken, and the sensor is arranged at the position of the sunken part of the floating block; the protruding parts on two sides of the middle part of the floating block are provided with limiting holes penetrating through the floating block along the lifting direction of the floating block, and the hole walls of the limiting holes form first step surfaces; the floating unit is further provided with a limiting rod, the limiting rod is inserted into the limiting hole, one end of the limiting rod is fixed in the mounting groove, and the other end of the limiting rod can be abutted with the first step surface to limit the extending height of the floating block.

The floating unit that sets up in this scheme includes the slider, pushes up the machined part from the mould through the slider, owing to adopt the elastic component jacking, the slider can set up great jacking face as far as possible in the space range that the mould allows, great jacking face can guarantee with the area of contact of machined part to promote the stability of jacking, the jacking in-process adds the work piece and is difficult for deviating, satisfies the required precision of manipulator snatching. In addition, the elasticity through the elastic component realizes the jacking, and elasticity is comparatively stable, and the release of power is comparatively even, at the in-process of jacking from the machined part and after ejecting, is difficult to cause the machined part to rock, drop, can improve the manipulator and snatch the success rate of machined part, and then improves production efficiency, reduces the production accident risk.

Drawings

FIG. 1 is a schematic view of a lower die for manufacturing a front frame of a vehicle;

FIG. 2 is a schematic structural diagram of a mold floating device according to an embodiment of the present invention;

FIG. 3 is an exploded view of the mounted slider location of FIG. 2;

FIG. 4 is a cross-sectional view of the slider lift-out, spring return of the floating unit of FIG. 3;

FIG. 5 is a cross-sectional view of the slider of the floating unit of FIG. 3 shown in a lowered, spring compressed state.

The reference numerals in fig. 1-5 are illustrated as follows:

1' -a lower die base; 2' -a lower die insert; 3' -a top rod; 4' -a cylinder;

1-lower die base; 2-a lower die insert; 2 a-a line hole; 3-a slider; 31-a limiting hole; 311-a first bore section; 312-a third bore section; 31 a-a first step surface; 31 b-a second step surface; 32-mounting holes; 4-a spring; 5-a limit bolt; 6-screw; 7-a sensor; 8, fixing a plate; 9-sliding sleeve.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a mold floating device according to an embodiment of the present invention; fig. 3 is an exploded view of the location of the mounted slider 3 of fig. 2.

The mold floating device in the embodiment comprises a mold, a lower mold of the mold is specifically shown in fig. 2, the lower mold comprises a lower mold base 1 and a lower mold insert 2 installed on the lower mold base 1, the lower mold insert 2 and the lower mold base 1 are arranged in a split mode and assembled on the lower mold base 1, the lower mold insert 2 has a shape matched with a machined part, a to-be-machined material is placed in the lower mold insert 2, the press drives an upper mold to press down, and after the lower mold is closed, the to-be-machined material is attached to the outer surface of the lower mold insert 2, so that the machined part is formed, and can be a finished product or a blank product needing to be further subjected to processes of polishing, trimming and the. The lower die insert 2 is mainly a molding matching machined part, the lower die insert 2 is used for placing a material to be machined, and the lower die insert 2 in fig. 2 is mainly used for stamping and forming a car beam and is matched with the structural shape of the car beam.

It should be noted that the floating device of the mold in this embodiment further includes at least one set of floating units, and fig. 2 shows two sets of floating units respectively located at the first end and the second end of the lower mold insert 2, which are opposite to each other. As shown in fig. 3, the floating unit includes a floating block 3 and at least one elastic member, specifically, springs 4, two springs 4 in fig. 3, a lower mold insert 2 of the mold is provided with a mounting groove, a notch of the mounting groove faces a demolding direction, a black arrow in fig. 2 shows the demolding direction, for the present embodiment, the mounting groove is provided on the lower mold insert 2, the notch of the mounting groove faces upward, and the demolding direction is also a floating and ejecting direction of the floating block 3. In this embodiment, a group of floating units is disposed in a corresponding one of the mounting grooves, and the elastic member is disposed between the floating block 3 and the bottom of the mounting groove.

As can be understood with reference to fig. 4 and 5, fig. 4 is a cross-sectional view of the floating unit of fig. 3 with the slider 3 lifted out and the spring 4 restored; fig. 5 is a cross-sectional view of the floating unit of fig. 3 in which the slider 3 is lowered and the spring 4 is compressed.

In fig. 4, the floating unit is in the first state, the floating block 3 extends out of the mounting groove by a certain height, that is, part of the floating block 3 extends out of the mounting groove, at this time, the floating block 3 and the spring 4 are not subjected to external pressure, and the spring 4 only bears the gravity of the floating block 3 and other components above the spring. When the die is used for producing a machined part, a to-be-machined material is placed at the position of the lower die insert 2 and contacts with the floating unit, the floating unit has a certain pre-positioning supporting function on the to-be-machined material, then the press drives the upper die to press down and the lower die to be matched, and performs stamping operation, in the process that the press drives the upper die to press down, the pressure is transmitted to the lower die insert 2 and the floating unit on the lower die insert 2 while the to-be-machined material bears the pressure, after the floating unit bears the pressure, the floating block 3 is pressed down and compresses the elastic piece, when the floating block 3 descends into the whole retraction mounting groove, the floating unit is in a second state shown in fig. 5, and the top surface of the floating unit is flush with the top surface of the. After the press moves for a preset stroke, the stamping process is completed, the press drives the upper die to leave the lower die insert 2, the external force acting on the floating unit is removed, the spring 4 is extended again, the floating block 3 is ejected out of the mounting groove again, and the machined part formed after stamping is correspondingly ejected from the lower die insert 2 in the ejection process, so that the machined part is separated from the lower die insert 2, for example, the machined part is convenient for a manipulator to grab and convey to the next process. In fig. 2, two ends of the lower die insert 2 are respectively provided with a group of floating units, so that the jacking process is more stable, and one or more than two groups of floating units can be distributed along the length direction of the lower die insert 2 according to requirements.

The floating unit that sets up in this embodiment includes slider 3, push up the machined part from the mould through slider 3, slider 3 can set up great jacking face as far as possible in the space range that the mould allows, use fig. 2 as an example, can set up the mounting groove as far as possible under the intensity of lower mould insert 2 and top surface area allow, thereby pack into slider 3 that has great top surface area, the top surface is slider 3's jacking face, the area of contact with the machined part can be guaranteed to great jacking face, thereby promote the stability of jacking, it is difficult in the skew to add the work piece in the jacking process, satisfy the required precision that the manipulator snatched. In addition, the elasticity through the elastic component realizes the jacking, and elasticity is comparatively stable, and the release of power is comparatively even, at the in-process of pushing away from the machined part, is difficult to cause the machined part to rock, drop.

As an optimized solution, the slider 3 is provided with at least one limiting hole 31 penetrating through the slider 3 along the lifting direction of the slider 3, as shown in fig. 3 and 4, the slider 3 is provided with two limiting holes 31, the hole wall of the limiting hole 31 forms a first step surface 31a facing the protruding direction of the slider 3, and in fig. 4, the first step surface 31a faces upward. In addition, the floating unit further comprises a limiting rod 5 matched with the limiting hole 31, one end of the limiting rod 5 is fixed in the mounting groove, the limiting rod 5 is further inserted into the limiting hole 31, the other end of the limiting rod 5 can interfere with the first step surface 31a to limit the extending height of the floating block 3, the upper end of the limiting rod 5 in the graph 4 is abutted to the first step surface 31a, the floating block 3 cannot continuously ascend and eject, and therefore the floating block 3 is guaranteed to be in a relatively stable position in the first state and cannot be separated from a mold.

The gag lever post 5 in this embodiment specifically is limiting bolt, limiting bolt's one end threaded connection in the bottom of mounting groove, and the bottom of mounting groove can set up complex screw hole with it, and limiting bolt's bolt head diameter is great, can form the interference with first step face 31a after inserting spacing hole 31, and in figure 4, during the installation, limiting bolt can be from last to passing spacing hole 31 down to threaded connection in the bottom of mounting groove, and it is comparatively convenient to connect the assembly. It can be understood that the gag lever post is not limited to spacing bolt, also can be other structures, for example gag lever post 5 can not set up the screw thread, and its lower extreme accessible sets up the buckle joint in the bottom of mounting groove, can also be fixed to the lateral wall of mounting groove, and specific fixed position does not do the restriction, and the floating lift that does not interfere floating block 3 can. The limiting structure for limiting the jacking height of the floating block 3 is not limited to the limiting rod 5, for example, a check ring can be arranged at the top of the groove wall of the mounting groove, a step is arranged on the periphery of the floating block 3, and the floating block 3 can be limited to continue to extend out when the check ring is abutted against the step.

Referring to fig. 4, in fig. 4, the limiting hole 31 is sequentially a first hole section 311, a second hole section, and a third hole section 312 from top to bottom, the size of the head of the limiting rod 5 is larger, the rest of the rod sections are equal-diameter rods with radial size smaller than the head, the outer diameter of the equal-diameter rods is approximately equal to the aperture of the second hole section, and is slightly smaller than the aperture of the second hole section, so that the floating block 3 slides relative to the limiting rod 5 when lifted and lowered, and can play a guiding role, and the first step surface 31a is formed at the position where the first hole section 311 and the second hole section are connected.

The aperture of the third hole section 312 of the limiting hole 31 is larger than the radial dimension of the equal-diameter rod of the limiting rod 31, at this time, a gap is formed between the third hole section 312 of the limiting hole 31 and the limiting rod 5, the floating unit further comprises a sliding sleeve 9 which is sleeved outside the limiting rod 5, and when the floating block 3 extends out of the mounting groove, part of the sliding sleeve 9 is positioned in the gap between the limiting hole 31 and the limiting rod 5. The slider 3 is in ascending or the decline in-process, and the slider 3 can slide relative to sliding sleeve 9, and the slip in-process, the pore wall of the third hole section 312 of slider 3 need not all contact sliding sleeve 9, is favorable to reducing the friction between slider 3 and gag lever post 5, and sliding sleeve 9 can play the guide effect moreover. It can be understood that the partial hole section of the limiting hole 31 and the limiting rod 5 form a gap to be matched with the sliding sleeve 9, and the partial hole section (such as the second hole section) can be equivalent to the size of the limiting rod 5 to play a main guide role.

In addition, the bottom dead center of the slider 3 can be determined by the height setting of the sliding sleeve 9, as shown in fig. 4, a second step surface 31b facing towards the second hole section and the third hole section 312 of the limiting hole 3 is formed, when the slider retracts downwards, the second step surface 31b can be abutted against the top of the sliding sleeve 9, and the slider 3 cannot continuously descend so as to avoid excessively compressing the spring 4 under an unexpected condition. The sliding sleeve 9 and the limiting rod 5 can be fixed or can be in clearance fit and can slide relatively.

For each embodiment, the floating unit further comprises a sensor 7 installed on the floating block 3, after the material to be processed is placed in the mold, the sensor 7 can detect the material to be processed to determine whether the material to be processed is placed in place, the sensor can be a contact sensor or a non-contact sensor, and the like, when the material to be processed is detected to be placed in place, the press is controlled to perform pressing operation to perform a stamping process, and if the material to be processed is not detected, the press does not perform pressing operation, so that production accidents are avoided.

As shown in FIG. 3, the sensor 7 is arranged in the middle of the floating block 3, the floating block 3 is provided with two sets of limiting holes 31 and limiting rods 5 which are respectively arranged on two sides of the sensor 7, so that the floating block 3 is more uniformly stressed and guided, and the sensor 7 is positioned in the middle and is more beneficial to protecting the sensor 7.

As shown in fig. 4, the slider 3 is provided with a mounting hole 32, the sensor 7 is inserted into the mounting hole 32, and an inductive head portion of the sensor 7 can extend out of the mounting hole 32 so as to sense the material to be processed, and it should be understood that, for a non-contact sensor, the sensor 7 does not extend out of the mounting hole 32, and whether the material to be processed is arranged in place can be determined according to the detected distance. Mounting the sensor 7 in the mounting hole 32 facilitates protection of the sensor 7. In fig. 3, the middle of the top of the slider 3 is recessed, i.e. is U-shaped, the protruding parts on both sides of the recessed position are provided with limiting holes 31, and the recessed position is provided with mounting holes 32 for mounting the sensor 7, thereby further protecting the sensor 7.

In fig. 3, the floating unit further includes a fixing plate 8, the sensing end of the sensor 7 is fixed to the fixing plate 8, the fixing plate 8 is fixed to the slider 3, and is specifically fixed to the slider 3 by a screw 6, so that the sensor 7 is fixed conveniently.

As shown in fig. 4, the lower die insert 2 of the mold is provided with a wiring hole 2a connected to the mounting hole 32 of the slider 3, and the sensor 7 may be connected to an output lead which is connected to the outside through the mounting hole 32 and the wiring hole 2a in this order, or connected to the outside through the lower die base 1. With such an arrangement, the sensor 7 can output signals smoothly without interfering with the stamping operation at the top surface, and it can be understood that the circuit hole 2a is not required when the sensor 7 is in wireless transmission.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The mold floating device comprises a mold and is characterized by further comprising at least one group of floating units, wherein each floating unit comprises a floating block (3) and at least one elastic piece, a mounting groove is formed in the position, used for placing a material to be processed, of the mold, the notch of the mounting groove faces the demolding direction, one group of floating units are arranged in the mounting groove, and the elastic pieces are arranged between the floating block (3) and the bottom of the mounting groove; under the first state, the floating block (3) extends out of the mounting groove for a certain height, and under the second state, the floating block (3) is pressed to descend to compress the elastic piece, and the floating block (3) retracts into the mounting groove.

2. The mold floating device according to claim 1, wherein the floating unit is provided with a limit structure for limiting the height of the floating block (3) protruding out of the mounting groove.

3. The mold floating device according to claim 2, wherein the slider (3) is provided with at least one stopper hole (31) penetrating the slider (3) in a lifting direction of the slider (3), and a hole wall of the stopper hole (31) forms a first step surface (31 a); the limiting structure is a limiting rod (5), the limiting rod (5) is inserted into the limiting hole (31), one end of the limiting rod (5) is fixed in the mounting groove, and the other end of the limiting rod (5) can be abutted against the first step face (31a) to limit the height of the floating block (3) extending out.

4. The mold floating device according to claim 3, wherein the stopper rod (5) is a stopper bolt which is screw-coupled to the bottom of the mounting groove.

5. The mold floating device according to claim 2, wherein a gap is formed between at least a part of the hole section of the check hole (31) and the check rod (5); the floating unit further comprises a sliding sleeve (9) sleeved outside the limiting rod (5), the length of the sliding sleeve (9) is smaller than that of the limiting rod (5), and when the floating unit is in a first state, the sliding sleeve (9) is partially positioned in the gap between the limiting hole (31) and the limiting rod (5).

6. The floating device of the mold according to any one of claims 1 to 5, wherein the mold comprises a lower mold base (1) and a lower mold insert (2) provided on the lower mold base (1) to match a work piece, and the mounting groove is provided on the top of the lower mold insert (2).

7. The mold floating device according to any one of claims 1 to 5, wherein the floating unit further comprises a sensor (7) mounted to the slider (3), the sensor (7) being capable of detecting the material to be processed after the material to be processed is placed in the mold and in place.

8. The mold floating device according to claim 7, characterized in that the floating block (3) is provided with a mounting hole, the sensor (7) is inserted into the mounting hole, and the sensing end of the sensor (7) is exposed out of the mounting hole or the sensor (7) is completely positioned in the mounting hole.

9. The mold floating device according to claim 8, wherein the floating unit further comprises a fixing plate (8), the sensing end of the sensor (7) is fixed to the fixing plate (8), and the fixing plate (8) is fixed to the top of the slider (3).

10. The mold floating device according to claim 8, wherein the slider (3) is recessed at the center of the top thereof, and the sensor (7) is provided at the recessed position of the slider (3); the protruding parts on two sides of the middle part of the floating block (3) are provided with limiting holes (31) penetrating through the floating block (3) along the lifting direction of the floating block (3), and the hole walls of the limiting holes (31) form first step surfaces (31 a); the floating unit is further provided with a limiting rod (5), the limiting rod (5) is inserted into the limiting hole (31), one end of the limiting rod (5) is fixed in the mounting groove, and the other end of the limiting rod (5) can be abutted with the first step face (31a) to limit the height of the floating block (3) extending out.