CN105195601A - Double-direction four-hole punching mold - Google Patents
Double-direction four-hole punching mold Download PDFInfo
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- CN105195601A CN105195601A CN201510788401.2A CN201510788401A CN105195601A CN 105195601 A CN105195601 A CN 105195601A CN 201510788401 A CN201510788401 A CN 201510788401A CN 105195601 A CN105195601 A CN 105195601A
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Abstract
The invention provides a double-direction four-hole punching mold, and belongs to the field of punching molds. The double-direction four-hole punching mold comprises an upper mold seat, a lower mold seat, a mold handle, a guide rod and a guide sleeve, wherein the upper mold seat is provided with an upper convex mold; the lower mold seat is provided with a lower convex mold; the upper mold seat is connected with two movable supporting plates; inclined surfaces are arranged at one sides, close to the upper convex mold, of the movable supporting plates; the inner sides of the inclined surfaces of the two movable supporting plates are provided with two sliding blocks; the upper surface of the lower mold seat is connected with a horizontal guide rail; the sliding blocks are in sliding connection with the horizontal guide rail; the two sliding blocks are provided with a left convex mold and a right convex mold; the lower mold seat is provided with a round cantilever beam which is provided with four mold holes; the lower surface of the lower mold seat is provided with a supporting rod; the free end of the supporting rod is hinged with a movable plate; the lower end of the lower convex mold and the lower end of the left side movable supporting plate are in contact with the upper surface of the movable plate. The double-direction four-hole punching mold provided by the invention can be used for processing the four holes in the side wall of the pipe-shape part when being installed once, and ensuring the processing efficiency and the processing accuracy.
Description
Technical field
The present invention relates to diel field, in particular to the two-way four hole stamping dies of one.
Background technology
In punch process, adding man-hour to the hole on the sidewall of tubular member, is all generally the processing that one time punching press completes a hole.If the sidewall of tubular member needs processing four at a distance of the hole of 90 degree, then need trade union college four times, each installation all needs to adjust angle, and processing technology is comparatively complicated, and machining accuracy is also difficult to guarantee.
Summary of the invention
The object of the present invention is to provide a kind of two-way four hole stamping dies, to improve the problems referred to above.
The present invention is achieved in that
A kind of two-way four hole stamping dies, comprise upper bolster, die shoe, die shank, guide rod and guide pin bushing;
Described die shank and guide pin bushing are all connected on described upper bolster, described guide rod is fixedly connected on die shoe, the other end is placed in described guide pin bushing, the lower surface of described upper bolster is provided with upper male mould, die shoe is provided with lower punch with upper male mould correspondence position, and described lower punch is flexibly connected with described die shoe;
Described upper bolster lower surface is fixedly connected with left movable supporting plate and right movable supporting plate, left movable supporting plate and right movable supporting plate are equipped with inclined-plane near upper male mould side, described left movable supporting plate and right movable supporting plate are all slidably connected with described die shoe, left slider is provided with on the right side of left movable supporting plate, the left side of right movable supporting plate is provided with right slide block, described die shoe upper surface is fixedly connected with horizontal guide rail, described left slider and right slide block are all slidably connected with described horizontal guide rail, described left slider is provided with left punch, and described right slide block is provided with right punch;
Described die shoe is provided with the circular cantilevers beam parallel with die shoe, on described circular cantilevers beam, correspondence position offers nib, lower nib, left nib and right nib;
Described die shoe lower surface is provided with the first support bar, described first support bar is between described left movable supporting plate and lower punch, the free end of described first support bar is hinged with the first portable plate, and the lower end of described lower punch and the lower end of left movable supporting plate all contact with described first portable plate upper surface.
In the technical program, die shank and upper male mould all directly can be fixed by screw with upper bolster, indirectly can certainly be fixed by other fixtures, and left punch and left slider, right punch and right slide block also can directly be fixed.Circular cantilevers beam is fixed on die shoe by vertical beam, four die holes in circular cantilevers beam can be four blind holes, also can be two orthogonal through holes, in actual production, left nib is equal with right nib aperture, upper nib is equal with lower nib aperture, but whether upper nib is equal with left nib aperture, decided by actual production demand.In process, circular cantilevers beam keeps inactive state, upper bolster moves downward the action simultaneously of drive upper male mould, lower punch, left punch and right punch, thus complete the processing in four holes on workpiece sidewall simultaneously, the processing in four holes completes in once mounting, ensure that machining accuracy, improve working (machining) efficiency.
Further, described upper bolster lower surface is provided with upper mounted plate, and the right surface of left slider is provided with left fixed head, and the left surface of right slide block is provided with right fixed head.
Upper mounted plate, left fixed head and right fixed head mainly play the effect of fixing upper male mould, left punch and right punch, facilitate the installation and removal of upper male mould, left punch and right punch.
Further, described left slider is provided with the lead-in chamfered with the slopes which match on left movable supporting plate, described right slide block is also provided with the lead-in chamfered with the slopes which match on right movable supporting plate.
In process, left slider moves under the slope driving on left movable supporting plate, if the rib of left slider is direct and contact of incline plane, the stress point of left slider will be very high, and left slider will be subject to larger tilting force.Therefore, left slider is provided with lead-in chamfered, the stress point of left slider can be reduced, reduce tilting force, make left slider more steady in motion process.Equally, right slide block also should arrange lead-in chamfered.
Further, the upper surface of described die shoe is provided with bottom plate, is provided with the first elastic reset part between described bottom plate and described left slider, is provided with the second elastic reset part between described fixed head and described right slide block.
After left punch and right punch complete punching processing, for realizing automatic demoulding, namely left slider and right slide block are returned to initial position, therefore arrange the first elastic reset part and the second elastic reset part.Bottom plate mainly plays the effect fixing the first elastic reset part and the second elastic reset part.
Further, described first elastic reset part and the second elastic reset part are spring or elastic caoutchouc.
First elastic reset part and the second elastic reset part all require to have compression and reset function, and therefore, both can be elastic caoutchoucs, also can be springs.
Further, die case is equipped with in described upper nib, lower nib, left nib and right nib.
In diel, punch coordinates repeatedly with nib, and nib can wear and tear gradually.Therefore, in upper nib, lower nib, left nib and right nib, arrange die case, die case is made up of high-abrasive material, can increase the mold use life-span.
Further, all offer dovetail groove with right slider bottom bottom described left slider, the outline of described horizontal guide rail and the Internal periphery of described dovetail groove match.
Coordinated with horizontal guide rail by the dovetail groove on left slider and right slide block, determine the movement locus of left slider and right slide block.This respective outer side edges precision is high, easy to process.
Further, described die shoe lower surface is provided with the second support bar, and described second support bar free end is hinged with the second portable plate, and the lower end of described lower punch and the lower end of right movable supporting plate all contact with described second portable plate upper surface.
The setting of the second support bar and the second portable plate can ensure that the lower punch left and right sides is all subject to thrust, and the tilting force that the lower punch left and right sides is subject to is cancelled out each other, thus reduces the frictional force between lower punch and die shoe.
Further, described first support bar and described first portable plate articulated position are positioned at the centre position of described first portable plate, and described second support bar and described second portable plate articulated position are positioned at the centre position of described second portable plate.
The benefit of this structure is, upper male mould and the lower punch displacement in process can be made to be consistent.
Further, described guide rod is 4, is located at the corner place of described die shoe respectively.
Guide rod is set to 4, enhances stability during upper bolster motion.
The invention has the beneficial effects as follows:
In two-way four hole stamping dies provided by the invention, circular cantilevers beam is fixedly connected on die shoe, when the setting of left movable supporting plate and right movable supporting plate ramp ensure that upper bolster moves downward, left punch and right punch all can move to the direction near workpiece.When the setting of the first portable plate and the first support bar ensure that upper bolster moves downward, die shoe can move upward, thus completes punching processing.This stamping die only needs once mounting just can complete the processing in 4 holes on workpiece sidewall, ensure that machining accuracy, improves working (machining) efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation of the two-way four hole stamping dies that Fig. 1 provides for the embodiment of the present invention 1;
The structural representation of the two-way four hole stamping dies that Fig. 2 provides for the embodiment of the present invention 2.
In figure, Reference numeral is:
Upper bolster 101; Die shoe 102; Die shank 103; Guide rod 104; Guide pin bushing 105; Upper male mould 106; Lower punch 107; Left movable supporting plate 108; Right movable supporting plate 109; Left slider 110; Right slide block 111; Horizontal guide rail 112; Left punch 113; Right punch 114; Circular cantilevers beam 115; Upper nib 116; Lower nib 117; Left nib 118; Right nib 119; First support bar 120; First portable plate 121; Upper mounted plate 122; Left fixed head 123; Right fixed head 124; Bottom plate 125; First elastic reset part 126; Second elastic reset part 127; Die case 128; Second support bar 129; Second portable plate 130; Base plate 131.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.
Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
In describing the invention, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this invention product orientation of usually putting or position relationship when using, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In addition, the term such as term " level ", " vertically ", " pendency " does not represent and requires parts abswolute level or pendency, but can tilt a little.As " level " only refers to its direction relatively " vertically " level more, be not that this structure of expression must level completely, but can tilt a little.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Embodiment 1, with reference to Fig. 1
A kind of two-way four hole stamping dies, comprise upper bolster 101, die shoe 102, die shank 103, guide rod 104 and guide pin bushing 105;
Described die shank 103 and guide pin bushing 105 are all connected on described upper bolster 101, described guide rod 104 one end is fixedly connected on die shoe 102, the other end is placed in described guide pin bushing 105, the lower surface of described upper bolster 101 is provided with upper male mould 106, die shoe 102 is provided with lower punch 107 with upper male mould 106 correspondence position, and described lower punch 107 is flexibly connected with described die shoe 102;
Described upper bolster 101 lower surface is fixedly connected with left movable supporting plate 108 and right movable supporting plate 109, left movable supporting plate 108 and right movable supporting plate 109 are equipped with inclined-plane near upper male mould 106 side, described left movable supporting plate 108 and right movable supporting plate 109 are all slidably connected with described die shoe 102, left slider 110 is provided with on the right side of left movable supporting plate 108, the left side of right movable supporting plate 109 is provided with right slide block 111, described die shoe 102 upper surface is fixedly connected with horizontal guide rail 112, described left slider 110 and right slide block 111 are all slidably connected with described horizontal guide rail 112, described left slider 110 is provided with left punch 113, described right slide block 111 is provided with right punch 114,
Described die shoe 102 is provided with the circular cantilevers beam 115 parallel with die shoe 102, and on described circular cantilevers beam 115, correspondence position offers nib 116, lower nib 117, left nib 118 and right nib 119;
Described die shoe 102 lower surface is provided with the first support bar 120, described first support bar 120 is between described left movable supporting plate 109 and lower punch 107, the free end of described first support bar 120 is hinged with the first portable plate 121, and the lower end of described lower punch 107 and the lower end of left movable supporting plate 108 all contact with described first portable plate 121 upper surface.
Described die shank 103 and described upper male mould 106 are "T"-shaped structure, after the stub end of die shank 103 is located on upper bolster 101, by screw, the stub end of die shank 103 is fixed on upper bolster 101, the stub end of upper male mould 106 is fixed on upper bolster 101 by screw after locating on upper bolster 101 by the stub end of upper male mould 106.
Described left punch 113 is "T"-shaped structure with described right punch 114, after the stub end of left punch 113 is located on left slider 110, by screw, the stub end of left punch 113 is fixed on left slider 110, the stub end of right punch 114 is fixed on right slide block 111 by screw after locating on right slide block 111 by the stub end of right punch 114.
Described left movable supporting plate 108 and right movable supporting plate 109 are all vertically arranged on upper bolster 101, left movable supporting plate 108 and right movable supporting plate 109 are all fixed by screw and upper bolster 101, and the shape of left movable supporting plate 108 and right movable supporting plate 109, structure, size are all identical.
The shape of described left slider 110 and right slide block 111, structure, size is all identical, all dovetail groove is offered bottom described left slider 110 He bottom right slide block 111, the outline of horizontal guide rail 112 and the Internal periphery of described dovetail groove match, horizontal guide rail 112 is divided into a left side, right two sections, left section of horizontal guide rail 112 slides for left slider 110, right section of horizontal guide rail 112 slides for right slide block 111, described horizontal guide rail 112 is located at the centre position of described die shoe 102 width, for avoiding interfering with horizontal guide rail 112 in left movable supporting plate 108 and right movable supporting plate 109 motion process, left movable supporting plate 108 and right movable supporting plate 109 all offer the groove passed through for horizontal guide rail 112.
For increasing the contact area between left slider 110 and left movable supporting plate 108, reduce the tilting force suffered by left slider 110, left slider 110 is provided with the lead-in chamfered with the slopes which match on left movable supporting plate 108, equally, described right slide block 111 is also provided with the lead-in chamfered with the slopes which match on right movable supporting plate 109.
Described lower punch 107 is cylindric, described die shoe 102 offers the through hole matched with described lower punch 107, described lower punch 107 can move up and down in described through hole, after completing for preventing punching processing, lower punch 107 comes off from die shoe 102, lower punch 107 is provided with boss, and the diameter of described boss is greater than the diameter of described lower punch 107.
Described die shoe 102 offers the strip through-hole passed through for left movable supporting plate 108 and right movable supporting plate 109, strip through-hole and the left movable supporting plate 108 on the left side match, and strip through-hole and the right movable supporting plate 109 on the right match.
Described first support bar 120 upper end and die shoe 102 are spirally connected, and the centre position of lower end and the first portable plate 121 is hinged.
For ensureing the stability of upper bolster 101 when moving, described guide rod 104 and guide pin bushing 105 are all set to 4, and 4 guide rods 104 are arranged at the corner place of die shoe 102 respectively.
After punching processing completes, to make lower punch 107 Automatic-falling from lower nib 117, can boss on lower punch 107 and between die shoe 102, back-moving spring is set.
In the present embodiment, for convenience of the cleaning staying the waste material in circular cantilevers beam 115 after punching processing, described upper nib 116 is set to a through hole with lower nib 117, described left nib 118 is set to a through hole with described right nib 119.
The two-way four hole stamping dies that the present embodiment provides, once mounting just can complete the processing in 4 holes on workpiece sidewall, ensure that machining accuracy, improves working (machining) efficiency.
Embodiment 2, with reference to Fig. 2
The device that the embodiment of the present invention provides, its technique effect realizing principle and generation is identical with preceding method embodiment, is concise and to the point description, and the not mentioned part of device embodiment part can with reference to corresponding contents in preceding method embodiment.
In the present embodiment, die shoe 102 lower surface is provided with upper mounted plate 122, and the right surface of left slider 110 is provided with left fixed head 123, and the left surface of right slide block 111 is provided with right fixed head 124.Upper mounted plate 122 offers the through hole supplying the little head end of upper male mould 106 to pass, left fixed head 123 offers the through hole supplying the little head end of left punch 113 to pass, right fixed head 124 offers the through hole supplying the little head end of right punch 114 to pass.
The upper surface of described die shoe 102 is provided with bottom plate 125, for realizing the automatic demoulding of left punch 113 and right punch 114, the first elastic reset part 126 is provided with between described bottom plate 125 and described left slider 110, the second elastic reset part 127, first elastic reset part 126 is provided with and the second elastic reset part 127 is elastic caoutchouc between described fixed head and described right slide block 111.
In the present embodiment, for making lower punch 107 uniform force, reduce the frictional force between lower punch 107 and die shoe 102, the second support bar 129 is provided with at die shoe 102 lower surface, second support is spirally connected by upper end and die shoe 102, described second support bar 129 lower end is hinged with the second portable plate 130, and the lower end of described lower punch 107 and the lower end of right movable supporting plate 109 all contact with described second portable plate 130 upper surface.Second support bar 129 and described second portable plate 130 articulated position are positioned at the centre position of described second portable plate 130.
Further, for ensureing that lower punch 107 is in the process of motion, first portable plate 121 and the second portable plate 130 do not interfere and can promote lower punch 107 all the time and move, lower punch 107 lower end is connected with base plate 131, the upper surface of described first portable plate 121 all contacts with the lower surface of base plate 131 with the upper surface of the second portable plate 130, and the connected mode that described base plate 131 and lower punch 107 are threaded connection is connected.
In addition, be equipped with die case 128 in described upper nib 116, lower nib 117, left nib 118 and right nib 119, die case 128 is made up of Hardmetal materials.
All the other structures of the present embodiment are identical with embodiment 1, do not repeat them here.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. two-way four hole stamping dies, is characterized in that, comprise upper bolster, die shoe, die shank, guide rod and guide pin bushing;
Described die shank and guide pin bushing are all connected on described upper bolster, described guide rod is fixedly connected on die shoe, the other end is placed in described guide pin bushing, the lower surface of described upper bolster is provided with upper male mould, die shoe is provided with lower punch with upper male mould correspondence position, and described lower punch is flexibly connected with described die shoe;
Described upper bolster lower surface is fixedly connected with left movable supporting plate and right movable supporting plate, left movable supporting plate and right movable supporting plate are equipped with inclined-plane near upper male mould side, described left movable supporting plate and right movable supporting plate are all slidably connected with described die shoe, left slider is provided with on the right side of left movable supporting plate, the left side of right movable supporting plate is provided with right slide block, described die shoe upper surface is fixedly connected with horizontal guide rail, described left slider and right slide block are all slidably connected with described horizontal guide rail, described left slider is provided with left punch, and described right slide block is provided with right punch;
Described die shoe is provided with the circular cantilevers beam parallel with die shoe, on described circular cantilevers beam, correspondence position offers nib, lower nib, left nib and right nib;
Described die shoe lower surface is provided with the first support bar, described first support bar is between described left movable supporting plate and lower punch, the free end of described first support bar is hinged with the first portable plate, and the lower end of described lower punch and the lower end of left movable supporting plate all contact with described first portable plate upper surface.
2. two-way four hole stamping dies according to claim 1, it is characterized in that, described upper bolster lower surface is provided with upper mounted plate, and the right surface of left slider is provided with left fixed head, and the left surface of right slide block is provided with right fixed head.
3. two-way four hole stamping dies according to claim 1, it is characterized in that, described left slider is provided with the lead-in chamfered with the slopes which match on left movable supporting plate, described right slide block is also provided with the lead-in chamfered with the slopes which match on right movable supporting plate.
4. two-way four hole stamping dies according to claim 3, it is characterized in that, the upper surface of described die shoe is provided with bottom plate, is provided with the first elastic reset part between described bottom plate and described left slider, is provided with the second elastic reset part between described fixed head and described right slide block.
5. two-way four hole stamping dies according to claim 4, is characterized in that, described first elastic reset part and the second elastic reset part are spring or elastic caoutchouc.
6. two-way four hole stamping dies according to claim 1, is characterized in that, be equipped with die case in described upper nib, lower nib, left nib and right nib.
7. two-way four hole stamping dies according to claim 1, is characterized in that, all offer dovetail groove with right slider bottom bottom described left slider, the outline of described horizontal guide rail and the Internal periphery of described dovetail groove match.
8. two-way four hole stamping dies according to claim 1, it is characterized in that, described die shoe lower surface is provided with the second support bar, described second support bar is between described right movable supporting plate and lower punch, described second support bar free end is hinged with the second portable plate, and the lower end of described lower punch and the lower end of right movable supporting plate all contact with described second portable plate upper surface.
9. two-way four hole stamping dies according to claim 8, it is characterized in that, described first support bar and described first portable plate articulated position are positioned at the centre position of described first portable plate, and described second support bar and described second portable plate articulated position are positioned at the centre position of described second portable plate.
10. the two-way four hole stamping dies according to any one of claim 1-9, it is characterized in that, described guide rod is 4, is located at the corner place of described die shoe respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788401.2A CN105195601A (en) | 2015-11-17 | 2015-11-17 | Double-direction four-hole punching mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788401.2A CN105195601A (en) | 2015-11-17 | 2015-11-17 | Double-direction four-hole punching mold |
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| Publication Number | Publication Date |
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| CN105195601A true CN105195601A (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510788401.2A Pending CN105195601A (en) | 2015-11-17 | 2015-11-17 | Double-direction four-hole punching mold |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847524A (en) * | 1981-09-18 | 1983-03-19 | Aida Eng Ltd | Side piercing metallic die |
| CN202239190U (en) * | 2011-08-18 | 2012-05-30 | 安徽小小神童童车有限公司 | A curved pipe hole-punching device |
| CN203679000U (en) * | 2013-12-30 | 2014-07-02 | 浙江金盾消防器材有限公司 | Bidirectional bottle cap punching mold |
| CN104028619A (en) * | 2013-03-08 | 2014-09-10 | 昆山小小恐龙儿童用品有限公司 | Scooter handlebar vertical tube punching die |
| CN104259319A (en) * | 2014-09-30 | 2015-01-07 | 重庆双狮摩托车制造有限公司 | Expanding and punching compound tool |
| CN205270549U (en) * | 2015-11-17 | 2016-06-01 | 重庆持恒模具有限公司 | Four two -way hole press dies |
-
2015
- 2015-11-17 CN CN201510788401.2A patent/CN105195601A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847524A (en) * | 1981-09-18 | 1983-03-19 | Aida Eng Ltd | Side piercing metallic die |
| CN202239190U (en) * | 2011-08-18 | 2012-05-30 | 安徽小小神童童车有限公司 | A curved pipe hole-punching device |
| CN104028619A (en) * | 2013-03-08 | 2014-09-10 | 昆山小小恐龙儿童用品有限公司 | Scooter handlebar vertical tube punching die |
| CN203679000U (en) * | 2013-12-30 | 2014-07-02 | 浙江金盾消防器材有限公司 | Bidirectional bottle cap punching mold |
| CN104259319A (en) * | 2014-09-30 | 2015-01-07 | 重庆双狮摩托车制造有限公司 | Expanding and punching compound tool |
| CN205270549U (en) * | 2015-11-17 | 2016-06-01 | 重庆持恒模具有限公司 | Four two -way hole press dies |
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Application publication date: 20151230 |
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