CN111151648A

CN111151648A - Stamping die assembly for producing clamp and using method thereof

Info

Publication number: CN111151648A
Application number: CN202010033485.XA
Authority: CN
Inventors: 刘智营; 丛良超; 李雪辰; 于浩; 连实慧
Original assignee: Hst Metals Co ltd
Current assignee: Hst Metals Co ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-05-15
Anticipated expiration: 2040-01-13
Also published as: CN111151648B

Abstract

The invention relates to the technical field of punch forming and discloses a stamping die assembly for producing a clamp and a using method thereof. The stamping die assembly for producing the clamp comprises a stamping and shearing die, a pre-forming die, an intermediate die and a final forming die; the punching and shearing die is used for forming a bending lug on a plate, the preforming die is used for forming a flanging section at the end part of the bending lug, the middle die is used for forming a hook, a wave-shaped surface is formed on two assembling surfaces of the hoop respectively, and the final forming die is used for folding the wave-shaped surface to form the final hoop. The production efficiency of the production hoop can be effectively improved, and the operation is convenient; the utilization rate of materials can be greatly improved, and the cost for producing the hoop is further reduced. In addition, the original wire cutting and machining modes are replaced by stamping modes, the size and shape precision of the clamp can be guaranteed, the surface quality of a stamping part cannot be damaged, the service life of the stamping die assembly is long, and the stamping quality is stable.

Description

Stamping die assembly for producing clamp and using method thereof

Technical Field

The invention relates to the technical field of punch forming, in particular to a stamping die assembly for producing a clamp and a using method thereof.

Background

At present, the manufacturing method for hoop production is that linear cutting and machining are combined, the whole outline of a thick plate is machined by linear cutting equipment, and then the machining treatment is carried out on the size of a key part by CNC equipment.

However, the above processing method has the following problems: 1. due to the adoption of a linear cutting mode, the utilization rate of materials is low, and the production cost for producing the clamp hoop is increased invisibly; 2. two processing modes of linear cutting and machining are adopted successively, so that the production process is complicated, and the production efficiency is low; 3. the surface quality of the band is poor due to this machining process.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a stamping die assembly for producing a clamp and a using method thereof, and aims to solve the problems of low material utilization rate and poor surface quality in the prior art.

(II) technical scheme

In order to solve the technical problem, the invention provides a stamping die assembly for producing a clamp, which comprises a stamping and shearing die, a pre-forming die, an intermediate die and a final forming die; the punching and shearing die is provided with a punching and shearing tool bit for punching and shearing the outer contour of the clamp and the bending lug; the preforming die is provided with a first punching column and a second punching column which are matched with each other, and the butt joint surface of the first punching column and the second punching column is provided with a bending matching surface for forming a folding edge section at the end part of the bending lug; the middle mould is provided with a second forming table and a third forming table which are matched with each other, a wave surface which is matched with each other is arranged between the second forming table and the third forming table, and the clamp is arranged between the second forming table and the third forming table so as to form a wave surface on two assembling surfaces of the clamp; the middle mould is also provided with a second forming column and a third forming column, the second forming column is provided with a bending section, the third forming column is provided with an arc-shaped forming surface matched with the bending section, and the bending section is matched with the arc-shaped forming surface to form a hook on the bending lug; the clamp is characterized in that a first forming table, a first forming column and an extrusion column which are matched with each other are arranged on the final forming die, arc-shaped matching surfaces used for being matched with the first forming column to form two assembling surfaces of the clamp are arranged on the first forming table and the extrusion column, and the first forming column is arranged on the clamp and is extruded between the first forming table and the extrusion column.

Further, be provided with the slant brace table on the preforming mould, be provided with first pin on the slant brace table, the clamp passes through first pin joint is in on the slant brace table.

Furthermore, a support column is further arranged on the final forming die, the bottom end of the support column is fixed on the first forming table, and an arc-shaped support surface with the same radian as the outer peripheral surface of the first forming column is arranged at the top end of the support column.

Furthermore, the number of the supporting columns is at least two, and the at least two supporting columns are respectively arranged on two sides of the first forming table and supported on the first forming column.

Further, be provided with the second pin on the second shaping bench, the clamp passes through second pin joint is in on the second shaping bench.

According to another aspect of the present invention, there is also provided a method of using the press die assembly for manufacturing a clamp band as described above, including the steps of: placing a plate on the punching and shearing die, and punching and shearing the plate through the punching and shearing die to form the outer contour and the bending lug of the hoop; transferring the plate punched and sheared by the punching and shearing die onto a preforming die, and bending the end part of the bending lug through the first punching column and the second punching column on the preforming die; placing the plate formed by the pre-forming die on the middle die, forming a wavy surface on the plate through the second forming table and the third forming table, and extruding a hook on the bending lug through the second forming column and the third forming column; and turning over the plate formed by the middle die and placing the plate on the final forming die, placing the first forming column between the first forming table and the extrusion column, and extruding the plate to form the hoop by the extrusion column and the first forming column.

(III) advantageous effects

The stamping die assembly for producing the hoop is provided by the invention, the stamping and shearing die, the preforming die, the intermediate die and the final forming die are arranged, the stamping and shearing die is used for forming the bending lug, the preforming die is used for forming the flanging section at the end part of the bending lug, the intermediate die is used for forming the hook, and the two assembling surfaces of the hoop are respectively provided with the wavy surface; the wave-shaped surface is turned over through the final forming die, so that the production efficiency of producing the clamp can be effectively improved, and the operation is convenient; the utilization rate of materials can be greatly improved, and the cost for producing the hoop is further reduced. In addition, the original wire cutting and machining modes are replaced by stamping modes, the size and shape precision of the clamp can be guaranteed, the surface quality of a stamping part cannot be damaged, the service life of the stamping die assembly is long, and the stamping quality is stable.

Drawings

FIG. 1 is a schematic structural diagram of a horizontal bending lug formed after punching and shearing by a punching and shearing die in an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a vertical bending lug formed after punching and shearing by a punching and shearing die in the embodiment of the invention;

FIG. 3 is a schematic block diagram of a clamp provided by an embodiment of the present invention;

FIG. 4 is a schematic block diagram of a preforming tool according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a first punching column and a second punching column according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of an intermediate mold provided in an embodiment of the present invention;

FIG. 7 is a schematic block diagram of the third forming station of FIG. 6 shown hidden;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

FIG. 9 is a schematic perspective view of an intermediate mold provided by an embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at B;

FIG. 11 is a schematic structural view of a final-forming mold provided in an embodiment of the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 11 at C;

FIG. 13 is a schematic perspective view of the band after being formed by the intermediate mold being placed on the final mold;

FIG. 14 is an enlarged view of a portion of FIG. 13 at D;

FIG. 15 is a schematic perspective view of a final form die stamping forming a clip according to an embodiment of the present invention;

fig. 16 is a partial enlarged view at E in fig. 15.

The reference numbers illustrate:

100. performing a mold; 102. a final forming die; 104. a first punching column; 106. a second punching column; 108. hooking; 110. a first molding table; 112. a first molding column; 114. extruding the column; 116. an assembly surface; 118. an intermediate mold; 120. a second molding table; 122. a third forming table; 124. an oblique support platform; 126. a first pin; 128. a support pillar; 130. a second molding column; 132. a third forming column; 134. a second pin; 136. bending the lug; 138. and (5) clamping a hoop.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 16 in combination, the present invention provides a stamping die assembly for manufacturing a band, including a stamping and shearing die, a preforming die 100, an intermediate die 118, and a final forming die 102; the punching and shearing die is provided with a punching and shearing tool bit for punching and shearing the outer contour of the hoop 138 and the bending lug 136; the preforming die 100 is provided with a first punching column 104 and a second punching column 106 which are matched with each other, and the butt joint surface of the first punching column 104 and the second punching column 106 is provided with a bending matching surface for forming a flanging section at the end part of the bending lug 136; the middle mold 118 is provided with a second forming table 120 and a third forming table 122 which are matched with each other, a wave surface which is matched with each other is arranged between the second forming table 120 and the third forming table 122, and the clamp 138 is arranged between the second forming table 120 and the third forming table 122 to form a wave surface on the two assembling surfaces 116 of the clamp 138; the middle mold 118 is further provided with a second forming column 130 and a third forming column 132, the second forming column 130 is provided with a bending section, the third forming column 132 is provided with an arc-shaped forming surface matched with the bending section, and the bending section is matched with the arc-shaped forming surface to form a hook 108 on the bending lug 136; the final forming die 102 is provided with a first forming table 110, a first forming column 112 and a pressing column 114 which are matched with each other, the first forming table 110 and the pressing column 114 are provided with arc-shaped matching surfaces which are used for being matched with the first forming column 112 to form two assembling surfaces 116 of a hoop 138, and the first forming column 112 is arranged on the hoop 138 and is pressed between the first forming table 110 and the pressing column 114.

The stamping die assembly for producing the clamp is provided by the invention, the stamping and shearing die, the preforming die 100, the intermediate die 118 and the final forming die 102 are arranged, the bending lug 136 is formed through the stamping and shearing die, the bending edge section is formed at the end part of the bending lug 136 through the preforming die 100, the hook 108 is formed through the intermediate die 118, and the wavy surfaces are respectively formed on the two assembling surfaces 116 of the clamp 138; the wave-shaped surface is turned over through the final forming die 102, so that the production efficiency of producing the hoop can be effectively improved, and the operation is convenient; the utilization rate of materials can be greatly improved, and the cost for producing the hoop is further reduced. In addition, the original wire cutting and machining modes are replaced by stamping modes, the size and shape precision of the clamp 138 can be guaranteed, the surface quality of a stamping part cannot be damaged, the service life of the stamping die assembly is long, and the stamping quality is stable.

Specifically, the punching and shearing die is provided with a punching and shearing tool bit for punching and shearing the outer contour of the hoop 138 and the bending lug 136.

As shown in fig. 1 and 2, the outer contour of the bracket 138 and the bending lug 136 can be punched out of the sheet metal by means of a punching and shearing die, whereby the shape of the punching and shearing head on the punching and shearing die is adapted to the outer contour of the bracket 138 and the shape of the bending lug 136. The basic contour of the clamp 138 and the bending lug 136 can be quickly formed on the raw material by arranging the punching and shearing die, and a foundation is laid for the subsequent punching of the preforming die 100, the intermediate die 118 and the final forming die 102.

In addition, as shown in fig. 2, after the punching and shearing die finishes punching and shearing, the bending lugs 136 are pushed out of the plane of the plate, so that the bending lugs 136 are basically perpendicular to the plane of the plate.

After the punching and shearing die completes punching and shearing the sheet material, the punched and sheared sheet material is placed on the preforming die 100. Referring to fig. 4 and 5, the preforming tool 100 includes a first punching column 104 and a second punching column 106 which are engaged with each other, wherein the first punching column 104 is disposed on a fixed stage of the preforming tool 100, and the second punching column 106 is disposed on a movable stage of the preforming tool 100, so that, in the present embodiment, the first punching column 104 is fixed and the second punching column 106 is moved to form a hem section at an end of the bending lug 136 by engagement of the second punching column 106 with the first punching column 104.

Further, referring to fig. 4, the preforming mold 100 is provided with an inclined support platform 124, the inclined support platform 124 is fixed on the fixing platform, the inclined support platform 124 is provided with a first pin 126, and the clamp 138 is clamped on the inclined support platform 124 through the first pin 126. As shown in fig. 4, the first punching column 104 penetrates the inclined support platform 124 to complete the matching with the second punching column 106.

That is, the clip 138 is fixed on the inclined support 124 by the first pins 126, specifically, by providing at least three first pins 126 on the inclined support 124 and clamping the clip 138 between at least three first pins 126. Preferably, there are four first pins 126. This ensures that the clamping of the angled support 124 to the clamp 138 is more stable. Of course, in other embodiments, the clip 138 may be secured to the angled support 124 by other means. For example, a groove structure corresponding to the outer contour of the clip 138 is formed on the inclined support 124, and the clip 138 is disposed in the groove structure.

The inclined support table 124 is provided for the purpose of: this facilitates the formation of the bent lug 136 on the surface of the yoke 138 substantially perpendicular to the surface of the yoke 138, and further, the formation of the folded edge section at the end of the bent lug 136 can be facilitated by the engagement of the first punched post 104 and the second punched post 106.

In addition, since the bending lugs 136 formed on the punching and shearing die are substantially perpendicular to the plane of the plate, in order to ensure that the bending lugs 136 are completely perpendicular to the plane of the plate, the inclined angle of the inclined support platform 124 may be 45 °, and accordingly, the inclined angles of the bending mating surfaces on the first punching column 104 and the second punching column 106 are perpendicular to the surface of the inclined support platform 124.

After the pre-forming mold 100 has been press molded to the bending lugs 136, it is transferred to the intermediate mold 118. The intermediate mold 118 is used to receive the band 138 stamped and formed by the pre-forming mold 100 and to form the undulating surface and the hooks 108 on the band 138.

Specifically, referring to fig. 6-10, the intermediate mold 118 is provided with a second forming station 120 and a third forming station 122 that cooperate with each other. The second forming table 120 is fixedly connected to a fixed table of the middle mold 118, the third forming table 122 is fixedly connected to a movable table of the middle mold 118, and a wave surface identical to the wave surface can be formed on the surface of the clip 138 by providing the wave surfaces which are matched with each other between the second forming table 120 and the third forming table 122.

Thus, it is easier to form the final mounting surface 116 of the band 138 on the final mold 102, and the undulating surface on the band 138 can be simply bent back directly to form the two mounting surfaces 116 of the band 138.

In addition, the bending lugs 136 of the clips 138 on the intermediate mold 118 are oriented vertically upward. Therefore, in order to accurately bend the bending lug 136 to form the hook 108, the intermediate mold 118 is further provided with a second forming column 130 and a third forming column 132, the second forming column 130 is provided with a bending section, the third forming column 132 is provided with an arc-shaped forming surface matched with the bending section, and the bending section is matched with the arc-shaped forming surface to form the hook 108.

As shown in fig. 8, the second molding column 130 is fixed to a fixed stage of the middle mold 118, and the third molding column 132 is fixed to a movable stage of the middle mold 118. A right-angle bending section similar to an L-shape is arranged at the top end of the second forming column 130, and an arc-shaped forming surface matched with the right-angle bending section of the L-shape is arranged at the lower end of the third forming column 132. Therefore, when the movable table of the middle mold 118 drives the third forming column 132 to move in a direction close to the second forming column 130, the arc-shaped forming surface on the third forming column 132 can bend the top end of the bending ear 136 to form a final hook 108 structure, and the bending section on the second forming column 130 can perform the positioning and bending functions on the bending ear 136. The hook 108 can be formed on the basis of the aforementioned bent ear 136 by the cooperation of the second forming post 130 and the third forming post 132.

Note that fig. 7 is a view of the third molding table 122 shown in fig. 6 hidden, and does not mean that the second molding table 120 and the third molding table 122 need to be removed and replaced with the second molding column 130 and the third molding column 132 in specific use. Thus, the second and third forming

columns

130, 132 may pass out of the second and third forming

stations

120, 122, respectively.

Further, a second pin 134 is disposed on the second forming table 120, and the clamp 138 is clamped to the second forming table 120 by the second pin 134.

Similarly, in order to fix the clamp 138 on the second forming table 120, in this embodiment, at least three second pins 134 are disposed on the second forming table 120, and the clamp 138 is clamped between the at least three second pins 134 to fix the clamp 138.

Preferably, there are four second pins 134. This ensures that the second forming table 120 is clamped more stably to the clamp 138. Of course, in other embodiments, the clip 138 may be secured to the second forming table 120 in other ways. For example, a groove structure corresponding to the outer contour of the clip 138 is formed on the second forming table 120, and the clip 138 is placed in the groove structure.

Referring to fig. 11 to 16, the first forming table 110 is fixed on a fixing table of the final forming mold 102, and an arc-shaped matching surface adapted to the first forming column 112 and the pressing column 114 is disposed on the first forming table 110. The pressing column 114 is fixed to a movable stage of the final-molding die 102 and corresponds to the position of the first molding stage 110. The first forming post 112 is disposed between the first forming table 110 and the compression post 114 to form a split ring-like structure on the band 138.

In this embodiment, the first forming column 112 is cylindrical and is disposed on the clamp 138, and when the pressing column 114 moves downward and contacts the first forming column 112, the pressing column 112 presses the first forming column 112 downward and presses the first forming column against the arc-shaped mating surface of the first forming table 110, so as to form a downward-bent arc-shaped structure on the clamp 138, and at this time, the structures at the two ends of the downward-bent arc-shaped structure form the mounting surface 116 of the clamp 138.

Specifically, referring to fig. 8, the undulating surface of the mounting surface 116 of the band 138 is formed in the intermediate mold 118. When the clip 138 is in the position shown in fig. 8, the hook 108 is upwardly facing and the undulating surface has two upwardly angled projections with a downwardly angled projection between the two upwardly angled projections. At this time, when the band 138 is turned to the finish mold 102, the band 138 needs to be turned upside down in order to prevent the hook 108 of the band 138 from being crushed. Thus, as shown in fig. 14 and 16, a groove structure for accommodating the hook 108 is provided on the first forming table 110, and at this time, two protrusions bent upwards in the wavy profile are turned downwards to become two protrusions bent downwards, and the protrusions bent downwards are turned upwards to become protrusions bent upwards. At this time, the first forming column 112 is placed between the pressing column 114 and the clamp 138, and then the pressing column 114 presses down the upward bent protrusions, and the downward bent protrusions at both sides are attached to the middle and abut against the outer side surface of the first forming column 112. Thus, the clip 138 shown in fig. 3 is formed.

With continued reference to fig. 12, a support post 128 is further disposed on the final-forming mold 102.

The support pillar 128 is provided to provide stable support to the first molding pillar 112, and thus the top end of the support pillar 128 is provided with an arc-shaped support surface having the same arc as the outer circumferential surface of the first molding pillar 112. In other words, the arc axis of the arc support surface at the top end of the support column 128 is collinear with the axis of the first forming column 112 and the axis of the arc mating surface on the first forming table 110. This ensures that an excessively smooth arcuate surface is formed on the clamp 138.

Still further, there are at least two support columns 128, and the at least two support columns 128 are respectively disposed at both sides of the first molding table 110 and supported on the first molding column 112.

By providing at least two support columns 128, stable support of the first forming column 112 can be achieved at both ends of the first forming column 112, and the stamping stability of the final forming die 102 is improved.

Through the cooperation of the punching shear die, the preforming die 100 and the intermediate die 118 final forming die 102, the punch forming of the clamp 138 can be quickly and effectively realized, and further, the production and manufacturing efficiency of the clamp 138 in the prior art is greatly reduced.

According to another aspect of the present invention, there is also provided a method of using a press die assembly for manufacturing a clamp band as in any one of the preceding claims, comprising the steps of:

the method comprises the following steps:

placing the plate on a punching and shearing die, and punching and shearing the plate through the punching and shearing die to form the outer contour of the hoop 138 and the bending lug 136;

the plate punched and sheared by the punching and shearing die is placed on the preforming die 100, and the end part of the bending lug 136 is bent through the first punching column 104 and the second punching column 106 on the preforming die 100;

placing the plate formed by the pre-forming die 100 on the middle die 118, forming a wavy surface on the plate by the second forming table 120 and the third forming table 122, and extruding the hook 108 on the bending lug 136 by the second forming column 130 and the third forming column 132;

the plate formed by the intermediate mold 118 is turned over and placed on the final-forming mold 102, the first forming post 112 is placed between the first forming table 110 and the pressing post 114, and the plate is pressed by the pressing post 114 and the first forming post 112 to form the band 138.

The use method of the stamping die assembly for producing the clamp provided by the invention can rapidly and effectively realize stamping and production of the clamp 138 by using the stamping die assembly for producing the clamp. The method of using the stamping die assembly for manufacturing a band according to the present invention can be understood by referring to the stamping die assembly for manufacturing a band, which is not described herein again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A stamping die assembly for producing a clamp, comprising a shearing die, a preforming die (100), an intermediate die (118) and a final forming die (102);

the punching and shearing die is provided with a punching and shearing tool bit for punching and shearing the outer contour of the clamp (138) and the bending lug (136);

a first punching column (104) and a second punching column (106) which are matched with each other are arranged on the preforming die (100), and a bending matching surface used for forming a flanging section at the end part of the bending lug (136) is arranged on the butt joint surface of the first punching column (104) and the second punching column (106);

a second forming table (120) and a third forming table (122) which are matched with each other are arranged on the middle mold (118), a wave surface which is matched with each other is arranged between the second forming table (120) and the third forming table (122), and the clamping hoop (138) is arranged between the second forming table (120) and the third forming table (122) to form the wave surface on two assembling surfaces (116) of the clamping hoop (138); a second forming column (130) and a third forming column (132) are further arranged on the middle die (118), a bending section is arranged on the second forming column (130), an arc-shaped forming surface matched with the bending section is arranged on the third forming column (132), and the bending section is matched with the arc-shaped forming surface to form a hook (108) on the bending lug (136);

the end forming die (102) is provided with a first forming table (110), a first forming column (112) and an extrusion column (114) which are matched with each other, arc-shaped matching surfaces used for being matched with the first forming column (112) to form two assembling surfaces (116) of a hoop (138) are arranged on the first forming table (110) and the extrusion column (114), and the first forming column (112) is arranged on the hoop (138) and is extruded between the first forming table (110) and the extrusion column (114).

2. Stamping die assembly for the production of clamp bands according to claim 1, characterized in that a slanted support table (124) is provided on the preforming die (100), a first pin (126) is provided on the slanted support table (124), and the clamp band (138) is clamped on the slanted support table (124) by the first pin (126).

3. The press die assembly for manufacturing clamp according to claim 1, wherein a support pillar (128) is further provided on the final forming die (102), a bottom end of the support pillar (128) is fixed on the first forming table (110), and a top end of the support pillar (128) is provided with an arc-shaped support surface having the same arc as an outer peripheral surface of the first forming pillar (112).

4. A press die assembly for the production of clamp according to claim 3, characterized in that said support columns (128) are at least two, at least two support columns (128) being arranged on either side of said first forming table (110) and supported on said first forming column (112), respectively.

5. Stamping die assembly for the production of clamp according to claim 1, characterized in that a second pin (134) is provided on the second forming table (120), the clamp (138) being snapped onto the second forming table (120) by means of the second pin (134).

6. Use of a press-die assembly for the production of clamp bands according to any of claims 1 to 5, characterized in that it comprises the following steps:

placing a plate on the punching and shearing die, and punching and shearing the plate through the punching and shearing die to form the outer contour of the hoop (138) and the bending lug (136);

transferring the plate punched and sheared by the punching and shearing die onto a preforming die (100), and bending the end part of the bending lug (136) through the first punching column (104) and the second punching column (106) on the preforming die (100);

placing the sheet formed by the pre-forming die (100) on the middle die (118), forming a wavy surface on the sheet by the second forming table (120) and the third forming table (122), and extruding the hooks (108) on the bending lugs (136) by the second forming column (130) and the third forming column (132);

and turning over the plate formed by the middle die (118) and placing the plate on the final forming die (102), placing the first forming column (112) between the first forming table (110) and the extrusion column (114), and extruding the plate to form the hoop (138) by extruding the extrusion column (114) and the first forming column (112).