CN2712518Y - Precision clamp for limiting and shearing bars - Google Patents
Precision clamp for limiting and shearing bars Download PDFInfo
- Publication number
- CN2712518Y CN2712518Y CN 200420071423 CN200420071423U CN2712518Y CN 2712518 Y CN2712518 Y CN 2712518Y CN 200420071423 CN200420071423 CN 200420071423 CN 200420071423 U CN200420071423 U CN 200420071423U CN 2712518 Y CN2712518 Y CN 2712518Y
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- CN
- China
- Prior art keywords
- lever
- top shoe
- loam cake
- slide block
- sliding block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a precision clamp for limiting and shearing bars, comprising an upper slide block, a lower slide block, a booster spring, a supporting spring, an upper cover, a lower cover, an upper sleeve barrel, a lower sleeve barrel, a guide lever, a lever, a roller, a cam, etc. The upper cover is fixedly connected with the lower cover, and the upper sleeve barrel is fixedly connected with the lower slide block. When the utility model works, a knife tool and the cam are move downward, and the supporting spring drives the upper slide block to move along the guide lever horizontally. The upper slide block drives the lever to rotate along a supporting point through a connecting lever and drives the lower slide block and the upper sleeve barrel to move downward until to press the bars tightly. After the knife tool cutting off the bars, the knife tool and the cam are move upward, the cam drives the roller to make the lever have a reversing rotation, and the lever pushes the upper slide block back. The lower slide block and the upper sleeve barrel are move upward to form bars interstice again under the action of the supporting spring. The utility model is characterized in that the zero interstice self-locking clamp is realized, the processing accuracy is raised, the clamp and the loose of the bars are automatically finished by a machine tool driving the clamp, and the operation is simple.
Description
Affiliated technical field
The utility model relates to the radial shear device of bar, and especially precise clamp is sheared in the bar constraint.
Background technology
Shearing is one of main method of blanking, this method production efficiency height, and otch does not have spillage of material, therefore is widely used in bearing industry.The radially clamping shear mould major part of existing bar is the knife plate sleeve.Have following drawback with this mould blanking: cutting stock precision is poor, and the section oblique angle is generally 11 °～13 °, presses to collapse generally more than 2mm, and weight error is 3～5%, but also jagged, directly influences forging quality, so that influence the quality of following process operation.Germany " Wagner " company produces is used for the sheared blank clamp mechanism, adopts cylinder to promote skewback and compresses, though the good extra power, complex structure cost height of still needing of effect.
Summary of the invention
The technical problems to be solved in the utility model can realize when providing a kind of shearing bar that the zero clearance self-locking clamps, and need not additionaling power, bar radial constraint accurate-shearing device cheap for manufacturing cost again.
The utility model adopts following manner to achieve the goal: precise clamp is sheared in a kind of bar constraint, comprises knife plate, die shank, die shoe and hopper, also comprises loam cake, lower cover, upper bush, lower sleeve, hold down gag and oblique projection linkage.Lower sleeve is arranged in lower cover upper notch and fixing with it, and lower cover is fixedlyed connected with the die shoe of below by securing member.The loam cake middle part has the notch that Open Side Down, loam cake to be positioned at lower cover top and connects both ends with securing member.Tiltedly the projection linkage is fixed by fulcrum piece and loam cake.Described hold down gag comprises top shoe, sliding block, boosting spring, support spring and guide rod, horizontal positioned and the two ends and the loam cake that pass two guide rods of top shoe are fixed, guide rod becomes to be slidingly matched with the hole of top shoe, the upper surface of top shoe contacts with loam cake notch bottom, the inclined-plane of top shoe is downward, be enclosed within boosting spring on the guide rod between thick end face of top shoe and loam cake, another thin end face of top shoe contacts with oblique projection linkage by connecting rod.Described upper bush is positioned at above the lower sleeve, and the lower sleeve of the upper bush of the capable notch of lower end band arc and the capable notch of upper end band arc forms the hopper of bar.Sliding block is positioned at upper bush top and fixedly connected with it, and the inclined-plane of sliding block makes progress and be consistent with the inclined-plane of top shoe, and the angle on sliding block inclined-plane and top shoe inclined-plane is less than the self-locking angle.The sliding block two ends are supported by support spring.Described knife plate be positioned at die shank below and be connected.
Tiltedly the projection linkage comprises connecting rod, lever and roller, and the balance pivot and the loam cake at lever middle part are fixed, and lever rotates by balance pivot, and lever one end is equipped with roller, other end contact connecting rod, and the connecting rod other end contacts with the thin end face of top shoe; Tiltedly projection is connected with the lathe on fastening die shank top.
Locate by guide pillar between upper bush and the lower sleeve.
Upper bush can be connected by screw with sliding block.
As further improvement: the right at hopper, material location device is arranged, this positioner comprises adjusting screw(rod) and screw bolt seat, and screw bolt seat and die shoe are fixed, and adjusting screw(rod) is to living hopper.By the extended position of adjusting screw(rod) at screw bolt seat, screw rod blocks bar, can realize the sheared blank size Control.
Further improve, adjusting screw(rod) is fixedly connected with the top near knife plate one end, and the hardness of top is more than the HRC38.
Described securing member is screw and pin.
The utility model course of work is: after rod feeding locates, ordinary press drives die shank and knife plate moves downward, instantly be that knife plate is not when touching bar as yet to certain position, top shoe moves right along the guide rod level under the effect of compressed boosting spring, promote lever by connecting rod and rotate around the balance pivot that is fixed on loam cake, the lever end roller arrives the minimum point of oblique projection; Meanwhile, top shoe give one of sliding block downward active force because upper bush links to each other with sliding block, move downward so sliding block can drive upper bush, up to contacting fully, and eliminated the gap that hopper and bar exist originally with bar; Support spring is compressed.Adopt the bigger boosting spring of coefficient of elasticity, contact fully with bar so can guarantee upper bush, and have a bigger pretightning force to act on the bar.Though can give anchor clamps upper bush and the very big upward reaction force of sliding block when cutter downcuts, because lathe is pushed down upper cover plate and top shoe, top shoe, sliding block have adopted the inclined-plane with auto-lock function, so bar is in clamped condition before shearing.Owing to the gap of having eliminated bar and upper bush after clamping, when bar is cut, just reduced material end gradient to greatest extent, thereby realized accurate blanking shearing.
When the drive cutter lifted after forcing press is sheared, tiltedly projection promoted the extreme higher position that roller slides into oblique projection, and lever is around the fulcrum backward rotation, and the other end connecting rod of lever can promote top shoe and be moved to the left, top shoe compression boosting spring.This moment, top shoe moved upward in the effect of support spring, drove upper bush and also moved upward, and the big gap between formation and lower sleeve guarantees feeding space next time again.
If the slide block inclined-plane and angle horizontal plane are θ, μ is the coefficient of friction between top shoe and sliding block, as long as θ≤arctan μ, top shoe will self-locking and can be to lower slider.After bar clamped, no matter bar is much to the active force of upper bush, top shoe can be to lower slider yet, thereby has realized the locking purpose.
The beneficial effects of the utility model are: the one, realize that the zero clearance clamps, and improved the precision of processing; The 2nd, adopted the slide block self-locking mechanism to realize that the bar of different tolerances also can clamp easily dexterously; The 3rd, power resources need not additionaling power in forcing press, and the clamping of bar and unclamp and drive anchor clamps by lathe and finish automatically is easy and simple to handle.
Description of drawings
Below in conjunction with drawings and Examples the utility model is elaborated:
Fig. 1 is the front view of a kind of structure of the utility model;
Fig. 2 is the vertical view of the broken section of Fig. 1.
Fig. 3 is the cutaway view of Fig. 1 in the A-A position;
Among the figure, 1. die shoe, 6. knife plate, 7. die shank, 8. bolt, 9. guide pin bushing, 13. support springs, 14. cushion blocks, 15. lower covers, 16. guide pillars, 17. spring guide, 18. boosting springs, 19. top shoes, 20. sliding blocks, 21. loam cakes, 22. guide rod, 23. rollers, 25. attachment screws, 27. levers, 28. connecting rods, 29. adjusting screw(rod), 30. screw bolt seats, 31. oblique projections, 32. upper bushes, 33. lower sleeves, 34. backing plate, 35. flanges, 36. fulcrum pieces, 39. tops.
The specific embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, precise clamp is sheared in a kind of bar constraint, comprise knife plate (6), die shank (7), die shoe (1) and hopper, also comprise loam cake (21), lower cover (15), upper bush (32), lower sleeve (33), hold down gag and oblique projection linkage.Loam cake (21) is positioned at lower cover (15) top and connects both ends with bolted; Upper and lower sleeve (32,33) and hold down gag are positioned between the upper and lower cover plate (21,15).Locate by guide pillar (16), guide pin bushing (9) between upper bush (32) and the lower sleeve (33).Lower sleeve (33), cushion block (14) are arranged in lower cover (15) upper notch and fix by screw, and lower cover (15) is fixedlyed connected with the die shoe (1) of below by bolt.There is the notch that Open Side Down at loam cake (21) middle part.Described hold down gag comprises top shoe (19), sliding block (20), boosting spring (18), support spring (13) and guide rod (22).The inclined-plane of sliding block (20) upwards and consistent with the inclined-plane of top shoe (19), the coefficient of friction between top shoe (19) and sliding block (20) inclined-plane is 0.15, the horizontal sextant angle on inclined-plane is 7 °, top shoe during work (19) will self-locking and can not slide left.Top shoe (19) passes two guide rods of horizontal positioned (22), and guide rod (22) two ends and loam cake (21) are fixing, and guide rod (22) becomes to be slidingly matched with the hole of top shoe (19).The upper surface of top shoe (19) contacts with loam cake (21) notch basal sliding, the boosting spring (18) that is enclosed within on the guide rod (22) is positioned between thick end face of top shoe (19) and the loam cake (21), and another thin end face of top shoe (19) contacts with tiltedly the projection linkage is movable by connecting rod.Tiltedly the projection linkage is fixing by fulcrum piece (36) and loam cake (21).Described upper bush (32) is positioned at above the lower sleeve (33), and the lower sleeve (33) of the upper bush (32) of the capable notch of lower end band arc and the capable notch of upper end band arc forms the hopper of bar.Tail end at hopper is equipped with the flange (35) of endoporus greater than the bar external diameter, and flange (35) passes through bolting with upper and lower covers (15,21).Between flange (35) and the lower sleeve (33) backing plate (34) is arranged.Sliding block (20) is positioned at upper bush (32) top and connects by bolt with it.Sliding block (20) two ends are supported by support spring (13), and guide pillar (16) and spring guide (17) are arranged in the middle of the support spring (13).Described knife plate (6) is positioned at die shank (7) below and is connected with die shank (7) by bolt (8), and die shank (7) is fixing in lathe upper table hole.Tiltedly projection (31) is connected by screw with the lathe side.
Upper bush and lower sleeve are HRC50～65 through heat treatment hardness.
Aforesaid oblique projection linkage comprises connecting rod (28), lever (27) and roller (23), the balance pivot and the loam cake (21) at lever (27) middle part fuse, lever (27) rotates by balance pivot, lever (27) one ends are equipped with roller (23) by attachment screw (25), the movable contact of other end connecting rod (28), connecting rod (28) other end contacts with the thin end face of top shoe (19).There is material location device on the right at hopper, and this positioner comprises adjusting screw(rod) (29) and screw bolt seat (30).Screw bolt seat (30) is fixed by screw and pin with die shoe (1), and adjusting screw(rod) (29) is over against living hopper, and adjusting screw(rod) is fixedly connected with top (39) near workpiece one end, and the hardness of top is HRC50.Can realize the sheared blank size Control at the extended position of screw bolt seat (30) by adjusting screw(rod) (29).
When the rod feeding hopper and locate, forcing press drives die shank (7) and knife plate (6) moves downward, when knife plate (6) when not touching bar as yet, top shoe (19) under the effect of the bigger boosting spring (18) of compressed coefficient of elasticity along guide rod (22) level to the right, promote connecting rod (28) lever (27) is rotated around the balance pivot that is fixed on loam cake (21), roller (23) is positioned at the minimum point of oblique projection (31); Meanwhile, it is downward that top shoe (19) promotes sliding block (20), and sliding block (20) can drive upper bush (32) and clamp bar fully up to contacting with bar downwards, and support spring (13) is compressed.Top shoe (19), sliding block (20) have the inclined-plane of self-locking, and bar is in clamped condition before shearing.Thereby realized that accurate blanking shears.
When the drive cutter lifts after forcing press is sheared, tiltedly projection (31) promotes the extreme higher position that roller 23 slides into oblique projection (31), lever (27) is around the fulcrum backward rotation, the other end connecting rod (28) of lever (27) can promote top shoe (19) and be moved to the left, top shoe (19) compression boosting spring (18).Top shoe this moment (19) moves upward in the effect of support spring (13), drives upper bush (32) and also moves upward, and the big gap between formation and lower sleeve (33) guarantees feeding space next time again.
Claims (7)
1, precise clamp is sheared in a kind of bar constraint, comprises knife plate, die shank, die shoe and hopper, it is characterized in that: also comprise loam cake, lower cover, upper bush, lower sleeve, hold down gag and oblique projection linkage; Lower sleeve is arranged in lower cover upper notch and fixing with it, and lower cover is fixedlyed connected with the die shoe of below by securing member; The loam cake middle part has the notch that Open Side Down, loam cake to be positioned at lower cover top and connects both ends with securing member; Described hold down gag comprises top shoe, sliding block, boosting spring, support spring and guide rod, horizontal positioned and the two ends and the loam cake that pass two guide rods of top shoe are fixed, guide rod becomes to be slidingly matched with the hole of top shoe, the upper surface of top shoe contacts with loam cake notch bottom, the inclined-plane of top shoe is downward, be enclosed within boosting spring on the guide rod between thick end face of top shoe and loam cake, another thin end face of top shoe contacts with oblique projection linkage by connecting rod; Described upper bush is positioned at above the lower sleeve, and the lower sleeve of the upper bush of the capable notch of lower end band arc and the capable notch of upper end band arc forms the hopper of bar; Sliding block is positioned at upper bush top and fixedly connected with it, and the inclined-plane of sliding block makes progress and be consistent with the inclined-plane of top shoe, and the angle on sliding block inclined-plane and top shoe inclined-plane is less than the self-locking angle; The sliding block two ends are supported by support spring; Described knife plate be positioned at die shank below and be connected.
2, precise clamp is sheared in the described bar constraint of claim 1, and it is characterized in that: described oblique projection linkage comprises connecting rod, lever and roller, and tiltedly the projection linkage is fixed by fulcrum piece and loam cake; The balance pivot and the loam cake at lever middle part are fixed, and lever rotates by balance pivot, and lever one end is equipped with roller, other end contact connecting rod, and the connecting rod other end contacts with the thin end face of top shoe; Tiltedly projection is connected with the lathe on fastening die shank top.
3, precise clamp is sheared in claim 1 or 2 described bar constraints, and it is characterized in that: by the guide pillar location, upper bush and lower sleeve are HRC50～65 through heat treatment hardness between upper bush and the lower sleeve.
4, precise clamp is sheared in claim 1 or 2 described bar constraints, and it is characterized in that: upper bush is connected by screw with sliding block.
5, precise clamp is sheared in claim 1 or 2 described bar constraints, it is characterized in that: the right at hopper, material location device is arranged, and this positioner comprises adjusting screw(rod) and screw bolt seat, and screw bolt seat and die shoe are fixed, and adjusting screw(rod) is to living hopper.
6, precise clamp is sheared in claim 1 or 2 described bar constraints, and it is characterized in that: described securing member is bolt and pin.
7, precise clamp is sheared in the described bar constraint of claim 5, and it is characterized in that: described adjusting screw(rod) is fixedly connected with the top near knife plate one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420071423 CN2712518Y (en) | 2004-07-13 | 2004-07-13 | Precision clamp for limiting and shearing bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420071423 CN2712518Y (en) | 2004-07-13 | 2004-07-13 | Precision clamp for limiting and shearing bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2712518Y true CN2712518Y (en) | 2005-07-27 |
Family
ID=34873945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420071423 Expired - Fee Related CN2712518Y (en) | 2004-07-13 | 2004-07-13 | Precision clamp for limiting and shearing bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2712518Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801756A (en) * | 2014-01-23 | 2014-05-21 | 燕山大学 | On-line servo cutting-to-length device for large-diameter PC steel bars |
| CN104259548A (en) * | 2014-08-07 | 2015-01-07 | 燕山大学 | Online servo large-diameter bar hydraulic follow-up fixed-length shearing mechanism |
| CN104384316A (en) * | 2014-09-26 | 2015-03-04 | 台州市良曜成套设备有限公司 | Bar material truncation mold and module fixing structure of bar truncation mold |
| CN105345972A (en) * | 2015-11-28 | 2016-02-24 | 渝北区千里马模具加工厂 | Device for removing burrs of square rubber work-pieces |
| CN109176121A (en) * | 2018-08-29 | 2019-01-11 | 平湖市钱江机械制造有限公司 | A kind of feed device |
| CN109702270A (en) * | 2019-01-18 | 2019-05-03 | 宝鸡市金海源钛标准件制品有限公司 | A kind of stud shearing blanking mold movable locating device |
-
2004
- 2004-07-13 CN CN 200420071423 patent/CN2712518Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801756A (en) * | 2014-01-23 | 2014-05-21 | 燕山大学 | On-line servo cutting-to-length device for large-diameter PC steel bars |
| CN103801756B (en) * | 2014-01-23 | 2016-01-06 | 燕山大学 | The online servo-actuated specified length shearing apparatus of Diameter PC rod iron |
| CN104259548A (en) * | 2014-08-07 | 2015-01-07 | 燕山大学 | Online servo large-diameter bar hydraulic follow-up fixed-length shearing mechanism |
| CN104259548B (en) * | 2014-08-07 | 2016-10-05 | 燕山大学 | Servo major diameter bar hydraulic follow-up cutting to length mechanism online |
| CN104384316A (en) * | 2014-09-26 | 2015-03-04 | 台州市良曜成套设备有限公司 | Bar material truncation mold and module fixing structure of bar truncation mold |
| CN105345972A (en) * | 2015-11-28 | 2016-02-24 | 渝北区千里马模具加工厂 | Device for removing burrs of square rubber work-pieces |
| CN105345972B (en) * | 2015-11-28 | 2017-08-29 | 渝北区千里马模具加工厂 | Square rubber workpiece deburring device |
| CN109176121A (en) * | 2018-08-29 | 2019-01-11 | 平湖市钱江机械制造有限公司 | A kind of feed device |
| CN109176121B (en) * | 2018-08-29 | 2024-04-12 | 平湖市钱江机械制造股份有限公司 | Feeding device |
| CN109702270A (en) * | 2019-01-18 | 2019-05-03 | 宝鸡市金海源钛标准件制品有限公司 | A kind of stud shearing blanking mold movable locating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |