Bending die mechanism with telescopic die head and bending machine

Abstract

The utility model discloses a bending die mechanism with a telescopic die head and a bending machine. According to the bending machine, operation switching of different die heads is achieved through stretching and retracting of the die heads of the two bending die mechanisms. The bending die mechanism comprises a die head telescopic bottom plate and a telescopic driving plate. And the telescopic driving plate is accommodated in the driving groove of the die head telescopic bottom plate. And the telescopic driving plate is provided with a driving roller and a driving wedge-shaped block with a driving inclined surface. And the die head telescopic bottom plate is provided with a roller driving groove matched with the driving roller and a driven inclined surface block with a driven inclined surface matched with the driving inclined surface. And a friction block with high elastic modulus is arranged at the top of the passive inclined plane block. The telescopic driving plate is driven by the telescopic driving cylinder to move horizontally in the long strip direction, and the die head telescopic bottom plate and the die head stretch out and draw back in the direction perpendicular to the long strip direction through the action of the driving inclined face, the driven inclined face and the driving rolling wheel in the rolling wheel driving groove. And when the die head extends out, the friction block is tensioned, so that slipping movement between the telescopic driving plate and the die head telescopic bottom plate is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plate bending machine. BACKGROUND

[0002] In the complex plate bending process, only one bending die head is often unable to realize the bending of the plate. In order to complete the bending of the complex plate, two or more bending machines are usually required in the prior art to realize the matching of different required die heads. A feasible idea is to directly set two or more bending die heads in one bending machine, and switch between different bending die heads when needed. However, how to realize the switching of the bending die head, and how to ensure that the switched bending die head has sufficient physical strength so that it can process the plate made of stainless steel or other materials with relatively high hardness. SUMMARY

[0003] The utility model solves the problem that the plate made of stainless steel or other materials with relatively high hardness can realize the complex bending process.

[0004] To solve the above problems, the utility model adopts the following scheme:

[0005] According to the bending die mechanism with a telescopic die head, the telescopic die head bottom plate is a long strip-shaped plate body, and a long strip direction partition ridge is arranged in the middle. The two sides of the partition ridge are respectively a driving groove and a die head mounting groove. The telescopic driving plate is arranged in the driving groove and is connected with a telescopic driving cylinder. The die head mounting groove is provided with a bending die head part which extends out of the die head mounting groove. The back surface of the telescopic die head bottom plate relative to the partition ridge is arranged on the die head mounting frame through a telescopic sliding rail, so that the telescopic die head bottom plate can translate along the telescopic sliding rail in the direction perpendicular to the long strip direction of the telescopic die head bottom plate. The telescopic driving plate is provided with a driving roller and a driving wedge-shaped block with a driving slope. The side of the partition ridge of the telescopic die head bottom plate facing the driving groove is provided with a passive slope block with a passive slope. The driving groove is provided with a roller driving groove with the same angle as the passive slope. The driving roller is accommodated in the roller driving groove. When the driving roller rolls along the roller driving groove, the driving slope of the driving wedge-shaped block and the passive slope of the passive slope block can move in close contact, so that the movement of the telescopic driving plate along the long strip direction drives the telescopic movement of the telescopic die head bottom plate in the direction perpendicular to the long strip direction under the driving of the telescopic driving cylinder.

[0006] Further, according to the bending die mechanism of the utility model, the distance between the two opposite sides of the roller driving groove groove body is greater than the diameter of the driving roller by not more than 1mm.

[0007] Further, the bending die mechanism of the utility model, the roller drive groove is connected with the groove body parallel to the long strip direction at the end far from the die head installation groove, the passive inclined surface block of the passive inclined surface block is connected with the protruding support surface parallel to the long strip direction at the end far from the die head installation groove, and the driving wedge-shaped block is provided with the protruding driving surface matched with the protruding support surface.

[0008] Further, the bending die mechanism of the utility model, the top of the passive inclined surface block is provided with the friction block installation groove, and the friction block is arranged in the friction block installation groove, the passive inclined surface top end portion and the protruding support surface are constructed by the friction block, and the friction block is made of hard rubber with high elastic modulus.

[0009] Further, the bending die mechanism of the utility model, the die head telescopic bottom plate separation ridge is further provided with the auxiliary passive block with an auxiliary passive inclined surface on the side towards the driving groove, the telescopic drive plate is further provided with the auxiliary drive block with an auxiliary drive inclined surface, the auxiliary drive inclined surface and the auxiliary passive inclined surface move in conjunction when the driving inclined surface and the passive inclined surface move in conjunction, the auxiliary passive block and the auxiliary drive block are separated when the protruding driving surface moves to the friction block.

[0010] Further, the die head telescopic bending die mechanism of the utility model, the driving wedge-shaped block and the driving roller constitute the telescopic drive unit, the telescopic drive plate is provided with a plurality of telescopic drive units, the passive inclined surface block and the roller drive groove constitute the telescopic passive unit matched with the telescopic drive unit, and the die head telescopic bottom plate is provided with the same number of telescopic passive units as the telescopic drive units.

[0011] Further, the bending die mechanism of the utility model further comprises the driving limiting plate arranged on the die head mounting frame, the driving limiting plate covers the driving groove, so that the driving groove forms a containing cavity containing the telescopic drive plate, the telescopic drive plate is provided with the translation clamping groove on the side towards the driving limiting plate, and the movement of the telescopic drive plate is realized through the clamping of the translation clamping groove and the driving limiting plate.

[0012] According to the bending machine, the bending mechanism comprises a support plate, a turnover frame and the bending die mechanism; the support plate is provided with an arc-shaped notch; the support plate is provided with 2N support plates which are vertically arranged and parallel to each other and have the same arc-shaped notch; the bending die mechanism vertically penetrates the support plate through the arc-shaped notch; every two adjacent support plates form a group and constitute N plate frame units, and an arc-shaped track is arranged on the inner side of the two support plates of the plate frame unit along the arc-shaped notch edge; the turnover frame is composed of N turnover supports; the turnover support comprises an arc-shaped tooth plate and two track support plates; the arc-shaped tooth plate is clamped between the two track support plates; the outer side surface of the track support plate is provided with a track outer arc wheel and a track inner arc wheel for clamping the arc-shaped track, so that the turnover support is located between the two support plates of the plate frame unit; the arc-shaped tooth plate is connected with the turnover power mechanism in a gear meshing mode; the die head mounting frame is composed of the track support plates; the telescopic sliding track is composed of clamping sliding strips arranged on the outer side surface of the track support plate; the die head telescopic bottom plate is telescopic and guided through the clamping of the clamping sliding groove on the track mounting block and the clamping sliding strip.

[0013] Further, according to the bending machine, the bending die mechanism has two; when the die heads of the two bending die mechanisms are telescopic with the die head telescopic bottom plate, the die heads of the two bending die mechanisms are radially telescopic with the center of the arc-shaped track, and the telescopic directions of the two die heads have a certain angle relative to the center.

[0014] Further, according to the bending machine, the bending mechanism has two; the two bending mechanisms are oppositely arranged and can adjust the distance between the two bending mechanisms under the driving of the motor.

[0015] The technical effects of the bending machine are as follows:

[0016] The bending machine has two telescopic bending die mechanisms, can realize the switching of two different die heads, and realizes the bending processing of complex plate materials.

[0017] The bending die mechanism avoids the slipping movement between the telescopic driving plate and the die head telescopic bottom plate through the tension of the friction block when the friction block is extended, and ensures the physical strength required when the die head is extended for processing.

[0018] The bending machine can improve the physical strength required for supporting the turnover of the bending die head by increasing the configuration of the plate frame unit, and ensure the turnover power required for bending the hard plate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the bending machine embodiment.

[0020] Figure 2is the structure diagram of the first perspective of the bending mechanism of the embodiment.

[0021] Figure 3 is the structure diagram of the second perspective of the bending mechanism of the embodiment.

[0022] Figure 4 is the structure diagram of the cooperation between the die mounting frame and the bending die mechanism of the embodiment.

[0023] Figure 5 is Figure 4 is the enlarged view of the part R in the dashed box.

[0024] Figure 6 is the structure diagram of the telescopic driving plate of the embodiment.

[0025] Figure 7 is the enlarged view of the end of the telescopic driving plate of the embodiment.

[0026] Figure 8 is the structure diagram of the die telescopic plate of the embodiment.

[0027] Figure 9 is the enlarged view of the end of the die telescopic plate of the embodiment.

[0028] Figure 10 is the cooperation diagram of the telescopic driving plate and the die telescopic plate of the embodiment.

[0029] wherein, Figure 2 and Figure 3 the rightmost support plate is hidden, and the part of the fixed frame plate between the support plates is hidden; Figure 7 opposite Figure 6 is the back perspective.

[0030] in the above figures,

[0031] 100 is the bending mechanism, 1 is the frame, 10 is the plate frame unit, 11 is the support plate, 111 is the arc-shaped notch, 112 is the arc-shaped track, 12 is the fixed plate frame;

[0032] 2 is the turnover frame, 20 is the turnover support, 21 is the arc-shaped tooth plate, 22 is the track support plate, 23 is the track outer arc wheel, 24 is the track inner arc wheel, 25 is the clamping sliding bar, 28 is the telescopic sliding track, and 29 is the die mounting frame;

[0033] 3 is the turnover power mechanism, 31 is the gear, 32 is the turnover synchronous shaft, and 33 is the turnover motor;

[0034] 4 is the bending die mechanism, and 40 is the bending die unit;

[0035] 41 is a die retracting base plate, 410 is a retracting passive unit, 4101 is a partition ridge, 4102 is a driving groove, 4103 is a die mounting groove, 411 is a passive inclined block, 4110 is a friction block mounting groove, 4111 is a passive inclined surface, 4112 is an extended support surface, 4113 is a retracted support surface, 412 is a roller driving groove, 4121 is a retracted support position, 4122 is an extended support position, 4123 is an extended rolling surface, 4124 is a retracted rolling surface, 413 is a friction block, 414 is an auxiliary passive block, 4141 is an auxiliary passive inclined surface;

[0036] 42 is a retracting driving plate, 420 is a retracting driving unit, 421 is a driving wedge-shaped block, 4211 is a driving inclined surface, 4212 is an extended driving surface, 4213 is a roller mounting groove, 422 is a driving roller, 423 is a translation clamping groove, 424 is an auxiliary driving block, 4241 is an auxiliary driving inclined surface, 429 is a driving connecting part;

[0037] 43 is a track mounting block, 431 is a clamping sliding groove, 48 is a bending die part, 481 is a die, 49 is a retracting driving cylinder;

[0038] 5 is a cushion frame plate, 6 is a pressing mechanism, 61 is a pressing frame plate, 62 is a pressing cylinder;

[0039] 900 is a rack base, 910 is a translation sliding rail, 920 is a translation driving mechanism, 921 is a translation motor, 922 is a lead screw, 923 is a translation synchronous shaft, 924 is a rotation reversing mechanism. DETAILED DESCRIPTION

[0040] The utility model will be made further detailed explanation in combination with the drawings.

[0041] Figure 1 An example of a bending machine is shown, which comprises two oppositely arranged bending mechanisms 100 arranged on the rack base 900. The distance between the two bending mechanisms 100 can be adjusted under the driving of the motor. In this embodiment, a plurality of parallel translation sliding rails 910 are arranged on the rack base 900, and the bending mechanism 100 is arranged on the translation sliding rail 910 through a sliding block, so that the bending mechanism 100 can translate along the translation sliding rail 910. The translation driving mechanism 920 is connected to the bending mechanism 100. The translation driving mechanism 920 comprises a translation motor 921 and a lead screw 922. The translation motor 921 is connected to the two lead screws 922 through a translation synchronous shaft 923 and a rotation reversing mechanism 924. The two lead screws 922 are respectively located on both sides and are parallel to the translation sliding rail 910, and are connected to the bending mechanism 100 through a lead screw sleeve. Thus, the translation motor 921 drives the lead screw 922 to rotate, and drives the bending mechanism 100 to translate through the action of the lead screw sleeve, so that the two bending mechanisms 100 can move towards or away from each other, thereby adjusting the distance between the two bending mechanisms 100.

[0042] The bending mechanism 100, with reference to Figure 2 and Figure 3 comprises a frame 1, a turnover frame 2, a bending die mechanism 4, a cushion frame plate 5 and a pressing mechanism 6. The turnover frame 2 is arranged on the frame 1 and is connected with a turnover power mechanism 3; the bending die mechanism 4 is arranged on the turnover frame 2 and is equipped with a die; thus, under the drive of the turnover power mechanism 3, the turnover frame 2 drives the bending die mechanism 4 to turn over so as to realize the plate bending operation of the die. The cushion frame plate 5 and the pressing mechanism 6 are arranged oppositely, and are used for clamping and fixing the plate during the plate bending. The pressing mechanism 6 comprises a pressing frame plate 61 and a pressing cylinder 62 connected with the pressing frame plate 61. The pressing frame plate 61 is arranged on the frame 1 through vertically arranged slide rails and slide blocks, can be lifted and lowered, and is located directly above the vertically arranged cushion frame plate 5. Under the drive of the pressing cylinder 62, the pressing frame plate 61 is pressed downward, so that the bottom surface of the pressing frame plate 61 and the top surface of the cushion frame plate 5 clamp the plate. The pressing cylinder 62 can be a pneumatic cylinder or a hydraulic cylinder. The structure and working mode of the cushion frame plate 5 and the pressing mechanism 6 are familiar to those skilled in the art, and will not be described in detail herein.

[0043] The frame 1 comprises a plurality of support plates 11 and a plurality of fixed plates 12. Each support plate 11 is vertically arranged and parallel to each other. The support plates 11 are connected and fixed through the fixed plates 12. Each support plate 11 is provided with an arc-shaped notch 111, and the arc-shaped notches 111 on each support plate 11 face the same direction, so that each support plate 11 forms an arc-shaped accommodation space at the arc-shaped notches 111. The bending die mechanism 4 is arranged in the arc-shaped accommodation space. That is, the horizontally arranged bending die mechanism 4 vertically passes through each vertically arranged support plate through the arc-shaped notches 111.

[0044] In this embodiment, the turnover frame 2 is composed of a plurality of turnover supports 20. The number of support plates 11 is even, i.e. 2N, and each two adjacent support plates 11 form a group, and N plate frame units 10 are formed. That is, each plate frame unit 10 contains two support plates 11 and corresponds to a turnover support 20. That is, the number of turnover supports 20 is the same as the number of plate frame units 10, and each turnover support 20 is arranged on the plate frame unit 10 and between the two support plates 11 of the plate frame unit 10. That is, the turnover support 20 has N. In this embodiment, N is 5, the support plate 11 has 10, and the plate frame unit 10 and the turnover support 20 are both 5. The inner side of the two support plates 11 of the plate frame unit 10 is provided with an arc-shaped track 112 along the edge of the arc-shaped notch 111. The turnover support 20 is arranged between the two support plates 11 of the plate frame unit 10 through the arc-shaped track 112.

[0045] With reference to Figure 4 and Figure 5The turnover support 20 comprises an arc-shaped toothed plate 21 and two track support plates 22. The arc-shaped toothed plate 21 is clamped and fixed between the two track support plates 22. The arc-shaped toothed plate 21 and the track support plates 22 are preferably fixed by bolts. The outer side of the track support plates 22 is provided with a plurality of track outer arc wheels 23 and a plurality of track inner arc wheels 24. The outer side here is the opposite side relative to the inner side and adheres to the arc-shaped toothed plate 21. The turnover support 20 is clamped to the arc-shaped track 112 by the track outer arc wheels 23 and the track inner arc wheels 24, so that the turnover support 20 is respectively arranged on the arc-shaped tracks 112 provided on the inner sides of the two support plates 11 of the plate support unit 10, thereby enabling the turnover support 20 to move along the arc-shaped track 112 to realize the turnover operation.

[0046] The arc-shaped toothed plate 21 is connected to the turnover power mechanism 3 by a gear meshing mode. In the embodiment, the arc-shaped toothed plate 21 is provided with meshing teeth on the arc-shaped edge. The turnover power mechanism 3 comprises a gear 31, a turnover synchronous shaft 32 and a turnover motor 33. The turnover synchronous shaft 32 is horizontally arranged on the rack 1 by bearings provided on each support plate 22, the gear 31 is arranged on the turnover synchronous shaft 32 and connected to the turnover motor 33 by the turnover synchronous shaft 32. The gear 31 on the turnover synchronous shaft 32 corresponds to the arc-shaped toothed plate 21. That is, the number of the gears 31 and the arc-shaped toothed plates 21 is the same, and each gear 31 is respectively meshed with the corresponding arc-shaped toothed plate 21. Thus, the turnover motor 33 drives the gear 31 to rotate to drive the turnover support 20 to turn over.

[0047] In the embodiment, the bending die mechanism 4 arranged on the turnover frame 2 comprises two bending die units 40. The bending die unit 40 is the bending die mechanism of the present application, which is a bending die mechanism with retractable die. Thus, the bending die mechanism 4 realizes the die switching of the two bending die units 40 by the die retraction. The bending die mechanism, i.e. the bending die unit 40, comprises a die retraction bottom plate 41 and a retraction driving plate 42. The die retraction bottom plate 41 and the retraction driving plate 42 are both long strip-shaped plates.

[0048] Referring to Figure 8 , Figure 9 and Figure 10The middle of the die stretchable base plate 41 is provided with a long strip direction partition ridge 4101. The partition ridge 4101 is a convex part on the plate body, and correspondingly, the two sides of the partition ridge 4101 are respectively a driving groove 4102 and a die mounting groove 4103. The die mounting groove 4103 is used for mounting the bending die part 48. The bending die part 48 comprises a mounting connecting strip and a die 481 connected with each other. The mounting connecting strip is arranged in the die mounting groove 4103 by means of bolt fixation, and the die 481 extends out of the die mounting groove 4103. The driving groove 4102 is used for accommodating the stretchable driving plate 42. The die stretchable base plate 41 is arranged on the die mounting frame 29 through the stretchable sliding track 28 relative to the back of the partition ridge 4101, so that the die stretchable base plate 41 can translate along the stretchable sliding track 28 in the direction perpendicular to the long strip direction of the die stretchable base plate 41, thereby realizing the stretchable translation of the die 481. When the die 481 stretches and contracts with the die stretchable base plate 41, it stretches and contracts radially with the center of the arc-shaped track 112 as the center, and the stretching and contracting directions of the dies 481 of the two bending die units 40 have a certain angle relative to the center of the arc-shaped track 112. The angle is usually 50-70 degrees.

[0049] More specifically, the die mounting frame 29 is composed of the track support plates 22. The outer side of each track support plate 22 is provided with a clamping sliding strip 25. The two clamping sliding strips 25 provided on the outer side of the track support plate 22 correspond to the two bending die units 40 respectively. The angle between the stretching and contracting directions of the dies 481 of the two bending die units 40 is also the angle between the two clamping sliding strips 25 provided on the outer side of the track support plate 22. The track mounting block 43 is fixedly arranged on the back of the die stretchable base plate 41 relative to the partition ridge 4101. The track mounting block 43 is provided with a clamping sliding groove 431. The clamping sliding groove 431 and the clamping sliding strip 25 are matched and clamped. Through the clamping of the clamping sliding strip 25 and the clamping sliding groove 431 of the track mounting block 43, the stretchable translation guiding of the die stretchable base plate 41 and the die 481 and the support of the bending die unit 40 are realized. That is, the aforementioned stretchable sliding track 28 is composed of the clamping sliding strips 25 on the outer side of each track support plate 22.

[0050] The stretchable driving plate 42 is arranged in the driving groove 4102 and connected with the stretchable driving cylinder 49 through the driving connecting part 429 at the end. More specifically, the die mounting frame 29 is provided with a driving limiting plate 44. That is, the driving limiting plate 44 is fixed on the die mounting frame 29 through the fixation with each track support plate 22. The driving limiting plate 44 covers the driving groove 4102, so that the driving groove 4102 forms a receiving cavity for accommodating the stretchable driving plate 42. The stretchable driving plate 42 is located in the receiving cavity. For reference Figure 6 , Figure 7 and Figure 10The one side of the telescopic driving plate 42 facing the driving limiting plate 44 is provided with a translation clamping groove 423. The translation clamping groove 423 and the sliding clamping of the driving limiting plate 44 realize the movement guiding of the telescopic driving plate 42. The movement direction of the telescopic driving plate 42 is parallel to the long strip direction of the mold telescopic bottom plate 41 and is perpendicular to the telescopic translation direction of the mold telescopic bottom plate 41.

[0051] The telescopic driving plate 42 is provided with a plurality of telescopic driving units 420, and the mold telescopic bottom plate 41 is provided with a plurality of telescopic passive units 410. The telescopic passive units 410 and the telescopic driving units 420 correspond to each other and are matched. Thus, referring to Figure 10 When the telescopic driving plate 42 moves in the long strip direction in the driving groove 4102 under the driving of the telescopic driving cylinder 49, referring to the arrow F direction, Figure 10 through the interaction of the telescopic passive units 410 and the telescopic driving units 420, the mold telescopic bottom plate 41 is driven to translate perpendicularly to the long strip direction, referring to the arrow M direction, Figure 10 thus realizing the telescopic translation driving of the mold telescopic bottom plate 41 and the mold 481.

[0052] Referring to Figure 6 and Figure 7 , in combination with Figure 10 , the telescopic driving units 420 on the telescopic driving plate 42 include a driving wedge block 421 and a driving roller 422 provided on the telescopic driving plate 42. Referring to Figure 8 and Figure 9 , in combination with Figure 10 , the telescopic passive units 410 on the mold telescopic bottom plate 41 include a passive inclined surface block 411 provided on the side of the partition ridge 4101 facing the driving groove 4102 and a roller driving groove 412 provided in the driving groove 4102. The driving wedge block 421 and the passive inclined surface block 411 are matched, and more specifically, the driving wedge block 421 is provided with a driving inclined surface 4211, and the passive inclined surface block 411 is provided with a passive inclined surface 4111. The driving inclined surface 4211 and the passive inclined surface 4111 are two matched inclined surfaces with the same inclined angle. Here, the inclined angle can be understood as the included angle with the long strip direction. Thus, the telescopic driving plate 42 provided in the driving groove 4102 moves in the long strip direction under the driving of the telescopic driving cylinder 49. Figure 10When the arrow F direction moves, the driving slope 4211 and the passive slope 4111 are matched through the slope effect, and the arrow M direction force is given to the die stretchable base plate 41, so as to push the die stretchable base plate 41 and the die 481 to stretch out. The roller driving groove 412 is a groove body with the same slope angle as the driving slope 4211 and the passive slope 4111, and the two sides of the groove body are respectively the stretching roller surface 4123 and the retracting roller surface 4124. The stretching roller surface 4123 and the retracting roller surface 4124 have the same slope angle as the driving slope 4211 and the passive slope 4111. The driving roller 422 on the stretchable driving plate 42 is accommodated in the roller driving groove 412. Thus, when the stretchable driving plate 42 moves along the arrow F direction, Figure 10 When the arrow F direction moves, the driving roller 422 is obliquely rolled on the stretching roller surface 4123, and the arrow M direction force is given to the die stretchable base plate 41 through the slope effect of the stretching roller surface 4123, so as to push the die stretchable base plate 41 and the die 481 to stretch out. That is, the die stretchable base plate 41 and the die 481 are stretched out through the joint effect of the driving slope 4211 of each stretchable driving unit 420, the passive slope 4111 of each stretchable passive unit 410, and the driving roller 422 of each stretchable driving unit 420 and the stretching roller surface 4123 of each stretchable passive unit 410.

[0053] In addition, the top of the driving wedge block 421 is provided with a stretching driving surface 4212, the top of the passive slope block 411 is provided with a stretching support surface 4112, and the top of the roller driving groove 412 is provided with a stretching support position 4122. The stretching driving surface 4212 and the stretching support surface 4112 are parallel to the long direction. Here, the top of the passive slope block 411 refers to the part of the passive slope block 411 away from the die mounting groove 4103, and the stretching support surface 4112 is connected to the passive slope 4111; the top of the driving wedge block 421 refers to the farthest part of the driving wedge block 421 outwardly protruding, and the stretching driving surface 4212 is connected to the driving slope 4211. The stretching support position 4122 is a groove body arranged in the long direction and connected to the roller driving groove 412, and the two sides of the groove body are parallel planes in the long direction. The stretching support position 4122 is connected to one end of the roller driving groove 412 away from the die mounting groove 4103.

[0054] The stretching driving surface 4212 and the stretching support surface 4112 are matched. When the stretchable driving plate 42 moves along the arrow F direction, Figure 10 When the arrow F direction moves to the end, the stretching driving surface 4212 at the top of the driving wedge block 421 is matched with the stretching support surface 4112 at the top of the passive slope block 411, and the driving roller 422 is stopped at the stretching support position 4122, which is the working state of the die 481. When the die 481 needs to be retracted, the stretchable driving plate 42 moves along the arrow F direction to the stretching driving surface 4212 at the top of the driving wedge block 421 and the stretching support surface 4112 at the top of the passive slope block 411 are matched, and the driving roller 422 is stopped at the stretching support position 4122, which is the working state of the die 481. Figure 10The arrow F shows the reverse direction movement, at this time the drive roller 422 is obliquely rolled on the retraction rolling surface 4124, through the action of the slope of the retraction rolling surface 4124, the arrow M of the die set retraction base plate 41 is given a reverse direction force, thereby pushing the die set retraction base plate 41 and the die head 481 to retract inward. At this time, the drive slope 4211 and the passive slope 4111 are generally left with a certain gap, and are not attached. That is, the distance between the two opposite surfaces of the roller drive groove 412 groove body is greater than the diameter of the drive roller 422, resulting in the asymmetric extension and retraction action of the die set retraction base plate 41 and the die head 481. The distance between the two opposite surfaces of the roller drive groove 412 groove body, that is, the distance between the extension rolling surface 4123 and the retraction rolling surface 4124. Generally speaking, the distance between the two opposite surfaces of the roller drive groove 412 groove body is greater than the diameter of the drive roller 422 by not more than 1mm.

[0055] The extension and retraction of the die set retraction base plate 41 and the die head 481 make the bending die head unit 40 have two states: working state and avoiding state. Only one of the two bending die head units 40 can be in the working state: when one bending die head unit 40 is in the working state, the other bending die head unit 40 needs to be in the avoiding state to make room for the working space of the plate bending of the die head 481 in the working state; when the bending machine is not in the working state, both of the two bending die head units 40 are usually in the avoiding state. Figure 10 The cooperation relationship of the die set retraction base plate 41 and the retraction drive plate 42 shown is the cooperation relationship of the bending die head unit 40 in the avoiding state, at this time, the drive roller 422 is located at the retraction support position 4121 of the roller drive groove 412, and the extension drive surface 4212 of the drive wedge block 421 is located at the retraction support surface 4113. The retraction support position 4121 is one end of the roller drive groove 412 close to the die head mounting groove 4103. The retraction support surface 4113 is a plane parallel to the long direction, connecting one end of the passive slope 4111 close to the die head mounting groove 4103.

[0056] In addition, in the bending die unit 40, the top of the passive inclined surface block 411 is provided with a friction block mounting groove 4110, and the friction block mounting groove 4110 is provided with a friction block 413, so as to avoid mutual slipping between the telescopic drive plate 42 and the die telescopic base plate 41 in the working state of the bending die unit 40. Thus, the top end part of the passive inclined surface 4111 and the extended support surface 4112 are formed by the friction block 413. The friction block 413 is made of hard rubber or hard plastic with a high elastic modulus. Here, the high elastic modulus refers to an elastic modulus of not less than 80 MPa. In the embodiment, the friction block 413 is preferably hard rubber. When the extended drive surface 4212 on the telescopic drive plate 42 is on the extended support surface 4112 in the working state of the bending die unit 40, the extended drive surface 4212 is tensioned and held on the extended support surface 4112 by the friction between the friction block 413 and the rubber surface, which has a much larger friction coefficient than metal.

[0057] In addition, in order to balance the friction when the driving inclined surface 4211 completely moves on the friction block 413, the die telescopic base plate 41 is further provided with an auxiliary passive block 414 with an auxiliary passive inclined surface 4141 on one side of the partition ridge 4101 facing the driving groove 4103, and the telescopic drive plate 42 is further provided with an auxiliary drive block 424 with an auxiliary driving inclined surface 4241. The auxiliary driving inclined surface 4241 and the auxiliary passive inclined surface 4141 are matched, and the auxiliary driving inclined surface 4241 and the auxiliary passive inclined surface 4141 move together when the driving inclined surface 4211 and the passive inclined surface 4111 move together. When the extended drive surface 4212 moves to the friction block 413, the auxiliary passive block 414 and the auxiliary drive block 424 are separated. When the extended drive surface 4212 moves to the friction block 413, it means that the part of the passive inclined surface 4111 that is in contact with the driving inclined surface 4211 is completely formed by the friction block 413. At this time, the friction between the die telescopic base plate 41 and the telescopic drive plate 42 is relatively large, and the auxiliary driving inclined surface 4241 and the auxiliary passive inclined surface 4141 are provided to balance the friction, so that the friction on the telescopic drive plate 42 is relatively stable.

[0058] In addition, in the embodiment, the driving roller 422 is arranged on the driving wedge block 421. More specifically, the driving wedge block 421 is provided with a roller mounting groove 4213 on the back surface where the driving roller 422 is arranged. The roller mounting groove 4213 is used to arrange the fasteners required for installing the driving roller 422. Those skilled in the art understand that the driving roller 422 can also be arranged at other positions, such as on the auxiliary drive block 424. In addition, those skilled in the art understand that the wheel surface of the driving roller 422 is preferably made of hard rubber or hard plastic with a high elastic modulus.

Claims

1. A bending die mechanism of a die stretchable, characterized by, The utility model relates to a die head retractable bottom plate and retractable drive plate, the die head retractable bottom plate is long strip board body, and is equipped with the ridge strip of long strip direction in the middle, the both sides of ridge strip are drive groove and die head installation groove respectively, retractable drive plate is arranged in drive groove, and is connected with retractable drive cylinder, die head installation groove is provided with the bending die head spare of die head extension die head installation groove, the back of die head retractable bottom plate is arranged on die head mounting frame through retractable sliding track relative to ridge strip, makes die head retractable bottom plate can be along retractable sliding track in perpendicular to the long strip direction of die head retractable bottom plate translation, retractable drive plate is provided with drive roller and drive wedge with drive inclined surface, the side of ridge strip of die head retractable bottom plate is provided with passive inclined surface block with passive inclined surface towards drive groove, drive groove is provided with roller drive groove with the consistent inclined angle of passive inclined surface, drive roller is housed in roller drive groove, when drive roller is inclined and rolls along roller drive groove, the drive inclined surface of drive wedge and the passive inclined surface of passive inclined surface block can be attached and moved, thereby making retractable drive plate drive die head retractable bottom plate retractable along perpendicular to long strip direction under the drive of retractable drive cylinder along long strip direction.

2. The bending die mechanism according to claim 1, wherein The distance between the opposite sides of the roller drive groove is greater than the diameter of the drive roller by no more than 1 mm.

3. The bending die mechanism according to claim 1, wherein The roller drive groove is connected to a groove body parallel to the long strip direction at the end away from the die head installation groove; the passive inclined surface of the passive inclined surface block is connected to an extension support surface parallel to the long strip direction at the end away from the die head installation groove; the drive wedge is provided with an extension drive surface matching the extension support surface.

4. The bending die mechanism according to claim 3, wherein The top of the passive inclined surface block is provided with a friction block installation groove, and a friction block is arranged in the friction block installation groove; the top end portion of the passive inclined surface and the extension support surface are constructed by the friction block; the friction block is made of hard rubber or hard plastic with high elastic modulus.

5. The bending die mechanism according to claim 4, wherein The side of the ridge strip of the die head retractable bottom plate towards the drive groove is further provided with an auxiliary passive block with an auxiliary passive inclined surface; the retractable drive plate is further provided with an auxiliary drive block with an auxiliary drive inclined surface; when the drive inclined surface and the passive inclined surface move in conjunction, the auxiliary drive inclined surface and the auxiliary passive inclined surface move in conjunction; when the extension drive surface moves to the friction block, the auxiliary passive block and the auxiliary drive block are separated.

6. The bending die mechanism according to any one of claims 1 to 5, characterized by The drive wedge and the drive roller constitute a retractable drive unit, and the retractable drive plate is provided with a plurality of retractable drive units; the passive inclined surface block and the roller drive groove constitute a retractable passive unit matching the retractable drive unit, and the die head retractable bottom plate is provided with the same number of retractable passive units as the retractable drive units.

7. The bending mold mechanism according to any one of claims 1 to 5, characterized by Further comprising a driving limiting plate arranged on the die mounting frame; the driving limiting plate covers the driving slot, so that the driving slot forms a receiving cavity for accommodating the telescopic driving plate; one side of the telescopic driving plate facing the driving limiting plate is provided with a translation clamping groove; the translation clamping groove and the clamping position of the driving limiting plate realize the movement guidance of the telescopic driving plate.

8. A bending machine comprising a bending mechanism, characterized in that The bending mechanism comprises a support plate, a turnover frame and the bending die mechanism according to any one of claims 1 to 7; the support plate is provided with an arc-shaped notch; the support plate has 2N, is vertically arranged and parallel to each other, and the arc-shaped notches face the same direction; the bending die mechanism vertically passes through the support plate through the arc-shaped notches; every two adjacent support plates form a group, which constitutes N plate rack units, and an arc-shaped track is arranged along the edge of the arc-shaped notch on the inner side of the two support plates of the plate rack unit; the turnover frame is composed of N turnover supports; the turnover support comprises an arc-shaped tooth plate and two track support plates; the arc-shaped tooth plate is clamped between the two track support plates; the outer side of the track support plate is provided with a track outer arc wheel and a track inner arc wheel for clamping the arc-shaped track, so that the turnover support is located between the two support plates of the plate rack unit; the arc-shaped tooth plate is connected to the turnover power mechanism through gear meshing; the die mounting frame is composed of the track support plates; the telescopic sliding track is composed of the clamping sliding strips arranged on the outer side of the track support plate; the die telescopic bottom plate realizes telescopic guidance through the clamping of the clamping sliding groove on the track mounting block and the clamping sliding strip.

9. The bending machine according to claim 8, characterized in that The bending die mechanism has two; when the dies of the two bending die mechanisms are telescoped with the die telescopic bottom plate, the dies of the two bending die mechanisms are radially telescoped with the center of the arc-shaped track, and the telescoping directions of the two dies have a certain included angle relative to the center.

10. The bending machine according to claim 8 or 9, characterized in that The bending mechanism has two; the two bending mechanisms are oppositely arranged and can adjust the distance between the two bending mechanisms under the driving of the motor. The bending mechanism has two; the two bending mechanisms are oppositely arranged and can adjust the distance between the two bending mechanisms under the driving of the motor.

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