CN210995949U - A preface shaping frock for production of omega type bullet strip - Google Patents
A preface shaping frock for production of omega type bullet strip Download PDFInfo
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- CN210995949U CN210995949U CN201921349080.6U CN201921349080U CN210995949U CN 210995949 U CN210995949 U CN 210995949U CN 201921349080 U CN201921349080 U CN 201921349080U CN 210995949 U CN210995949 U CN 210995949U
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Abstract
The utility model discloses an in-line forming tool for omega-shaped elastic strip production, which comprises an upper template and a lower template; the upper template is provided with a left upper die, a right upper die and a middle upper die, the left upper die and the right upper die are both provided with upper die rollers, and the middle upper die is provided with a middle upper die roller; the lower die plate is provided with a left lower die base, a right lower die base and a middle lower die, the left lower die base and the right lower die base are respectively provided with a material bearing wheel, a forming roller and a lower die cushion block, and the middle lower die is provided with a middle lower die roller. The utility model provides an omega-shaped elastic strip one-step forming tool, which can form two limbs of an elastic strip and also can carry out primary forming on the middle part of the elastic strip, thereby ensuring the positioning of the middle part of the elastic strip in the subsequent step; the operation is simpler, and the positioning is more accurate; the middle part of the elastic strip can achieve the purpose of reducing the thinning of the middle part and the tail part of the elastic strip through the primary forming in the first sequence and the forming in the second sequence, and the machining size precision of the omega-shaped elastic strip can be better ensured.
Description
Technical Field
The utility model relates to an preface shaping frock for production of omega type bullet strip.
Background
In the production of current omega type bullet strip, the structure of one preface shaping frock is shown as figure 1, includes: the die comprises an upper die plate 1, inner hexagon bolts 2, an upper die base 3, an upper die roller 4, a roller pin 5, a roller pin 6, a lower die roller 7, a lower die cushion block 8, inner hexagon bolts 9, inner hexagon bolts 10, a short lower die 11, a lower die plate 12, a middle bearing lower die 13, inner hexagon bolts 14, a positioning block 15, a jackscrew 16, inner hexagon bolts 17, a raw material workpiece 18, a material returning block 19, inner hexagon bolts 20, a material returning guide sleeve 21, a material returning base 22, a pressure spring 23, a primary forming workpiece 24 and the like.
The working principle of the existing omega-shaped elastic strip production one-step forming tool is shown in fig. 2 and 3: the robot hand puts the raw material workpiece 18 which is heated to the process requirement through the intermediate frequency on the lower die roller 7 and then retreats to a safe position; when the press receives a signal and starts to move downwards, the stripper block 19 compresses the compression spring 23 when contacting the middle part of the raw material workpiece 18, and when the press is at a bottom dead center, two ends of the raw material workpiece 18 are formed under the support of the lower die cushion block 8, so that a sequence of formed workpieces 24 (shown in figure 2) are obtained; then the press moves upwards, the material returning block 19 puts the formed workpiece 24 on the lower die under the action of the pressure spring 23, the press returns to the top dead center, the forming of the first process is finished, and the formed workpiece 24 enters the next process.
Therefore, the existing omega-shaped elastic strip production one-step forming tool can only form two limbs of the elastic strip, and the forming of the middle part of the elastic strip is left for the next step. In the next process, when the diameter of the raw material is at the lower limit of the standard required size, the phenomenon that the minimum sizes of the middle part and the tail part of the elastic strip are out of tolerance often occurs.
Disclosure of Invention
In order to overcome prior art's shortcoming, the utility model provides an preface shaping frock for omega type bullet strip production also carries out the primary forming to the middle part of bullet strip when two limbs fashioned to bullet strip, like this, in the next process of bullet strip production, can conveniently fix a position the middle part of bullet strip, has reduced the drawing thin of back process to middle part and afterbody. The thinning can be controlled to be about 0.25mm (the original forming mode is about 0.4 mm), the product percent of pass is improved, the requirement on the outer diameter precision of the raw material is reduced, and the purchase cost of the raw material is reduced.
The utility model adopts the technical proposal that: an in-sequence forming tool for producing omega-shaped elastic strips comprises an upper template and a lower template; the upper template is provided with a left upper die, a right upper die and a middle upper die, the left upper die and the right upper die are both provided with upper die rollers, and the middle upper die is provided with a middle upper die roller; the lower die plate is provided with a left lower die base, a right lower die base and a middle lower die, the left lower die base and the right lower die base are respectively provided with a material bearing wheel, a forming roller and a lower die cushion block, and the middle lower die is provided with a middle lower die roller.
Furthermore, grooves are formed in the upper template and the lower template and are used for positioning the left upper die, the right upper die, the middle upper die, the left lower die seat, the right lower die seat and the middle lower die respectively.
Furthermore, the left upper die, the right upper die and the middle upper die are respectively fixed on the upper die plate through six inner bolts; the left lower die base, the right lower die base and the middle lower die are fixed on the lower die plate through six inner bolts respectively.
Furthermore, a left positioning block and a right positioning block are arranged on the lower template, jackscrews are in threaded connection with the left positioning block and the right positioning block, one end of each jackscrew props against the lower die base, and the other end of each jackscrew is locked by a nut.
Furthermore, the middle lower die roller is connected to the middle lower die through a pin shaft.
Furthermore, the middle and lower die rollers are tightly propped through the inner six bolts.
Furthermore, arc-shaped grooves are formed in the idler wheels, the material bearing wheels and the lower die cushion block.
Still further, the diameter of the circular arc is larger than the diameter of the raw material.
Furthermore, the circular arc diameter of the material bearing wheel is larger than that of each roller.
Furthermore, the contact point between the two ends of the raw material and the bottom diameter of the material bearing wheel is 2mm higher than the contact point between the two ends of the raw material and the bottom diameter of the roller of the middle lower die.
Compared with the prior art, the utility model has the positive effects that:
the utility model provides a omega type bullet strip one preface shaping frock, through the well upper die and the well upper die gyro wheel that set up on the cope match-plate pattern, jackscrew and the nut that sets up on the left and right locating piece of lower bolster, the material wheel that holds that sets up in the upper end of the left lower die holder and the right lower die holder of lower bolster, the mid-mounting has the shaping gyro wheel to and the well lower mould gyro wheel that sets up on well lower mould, cooperate jointly, also carry out the primary shaping to the middle part of bullet strip when shaping two limbs of bullet strip, guaranteed the location of bullet strip middle part in the preface process; the utility model has simpler operation and more accurate positioning; the middle part of the elastic strip is formed twice through the primary forming in the first sequence and the forming in the second sequence, so that the purpose of reducing the thinning of the middle part and the tail part of the elastic strip can be achieved, and the machining size precision of the omega-shaped elastic strip can be better ensured.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a front view of a conventional omega-shaped elastic strip production one-step molding tool;
FIG. 2 is a first schematic diagram of a conventional omega-shaped elastic strip production first-order forming tool;
FIG. 3 is a second schematic diagram of the operation of a first forming tool for producing omega-shaped elastic strips;
fig. 4 is a front view of the present invention;
fig. 5 is a top view of the present invention;
fig. 6 is a side view of the present invention;
fig. 7 is a first working schematic diagram of the present invention;
fig. 8 is a second working schematic diagram of the present invention.
Detailed Description
An order forming tool for producing omega-shaped elastic strips, as shown in fig. 4 to 6, comprises: the forming die comprises a lower die plate 1, a left positioning block 2, a nut 3, an inner six-bolt 4, a jackscrew 5, a left lower die base 6, an upper die roller 7, a roller pin 8, a left upper die 9, a right upper die 9, an inner six-bolt 10, an upper die plate 11, an upper middle die 12, an inner six-bolt 13, an upper middle die roller 14, a material bearing wheel 15, a forming roller 16, a right lower die base 17, a lower die cushion block 18, an inner six-bolt 19, a middle lower die 20, an inner six-bolt 21, a right positioning block 22, an inner six-bolt 23, a pin shaft 24, a roller 25, an inner six-bolt 26, an inner:
a left positioning block 2 is fixed on a lower template 1 through an inner six-bolt 4, a jackscrew 5 is connected on the left positioning block 2 through threads and locked by a nut 3, a left lower template seat 6 and a right lower template seat 17 are fixed on the lower template 1 through an inner six-bolt 19, an upper template roller 7 is connected in a left upper template 9 and a right upper template 9 through a roller pin 8, the left upper template 9 and the right upper template 9 are fixed at two ends of an upper template 11 through an inner six-bolt 10, a middle upper template 12 is fixed in the middle of the upper template 11 through an inner six-bolt 13, a middle upper template roller 14 is connected at the lower end of the middle upper template 12 through a roller pin 8, a material bearing wheel 15 and a forming roller 16 are respectively connected in the left lower template seat 6 and the right lower template seat 17 through roller pins, a middle lower template 20 is fixed in the middle of the lower template 1 through an inner six-bolt 21, a lower template cushion, and is locked by an inner six-bolt 27 to prevent rotation.
Grooves are formed in the upper template 11 and the lower template 1, so that the left upper die 9, the right upper die 12, the right lower die seat 17, the left lower die seat 6 and the middle lower die 20 can be conveniently and quickly positioned.
Two limbs of original one preface frock main shaping bullet strip, no matter two prefaces are through work piece both ends location, or middle location, all can cause work piece position change or rock because of heating temperature's fluctuation, can be on one side long, on the other side short after two preface shaping. Most importantly, when the diameter of the raw material is limited to the size required by the standard, the middle part and the tail part of the elastic strip are thinned frequently, and the minimum size is out of tolerance, so that unqualified products are produced. This shaping frock also carries out the primary shaping to the middle part of bullet strip when two limbs shaping to bullet strip, like this, in the next process of bullet strip production to the middle part of bullet strip is fixed a position, goes up the mould gyro wheel and can automatic alignment when downwards, owing to just press from both sides the design size requirement to middle part bullet strip at the size of primary shaping play bullet strip middle part length already in an preface very easily. The thinning of the middle part and the tail part is reduced, and the size precision of the omega-shaped elastic strip can be better ensured.
1. The rollers and the lower die cushion block 18 are respectively provided with an arc which is slightly larger than the diameter of the raw material, and the arc has the functions of guiding, increasing the contact surface and reducing the indentation.
2. The upper end of the middle lower die 20 adopts the roller 25 with the circular arc, so that the limiting effect is achieved, the inner six-bolt 27 tightly supports the roller 25 to prevent the rotation and the left and right material running, when the abrasion reaches a certain degree, the roller can be continuously used when rotating to an unused position, and the service life of the die is prolonged. The middle part of the elastic strip is preliminarily molded while two limbs are molded by arranging the middle upper die 12 and the middle upper die roller 14, so that the middle part of the elastic strip is positioned in the next process of elastic strip production, the upper die roller can automatically align downwards, and the middle elastic strip can be easily clamped to the design size requirement in the second process due to the fact that the size of the length of the middle part of the elastic strip is preliminarily molded in the first process. The thinning of the middle part and the tail part is reduced, the forming tool can be controlled to be about 0.25mm (and the thinning of the existing forming mode is about 0.4 mm), the product percent of pass is improved, the requirement on the outer diameter precision of raw materials is reduced, and the purchase cost of the raw materials is reduced.
3. The end face of the heated workpiece exceeds the center line of the material bearing wheel 15 by a little, and the diameter is as small as possible, so that the upper die roller 7 can be separated from the material bearing wheel 15 as soon as possible when contacting the raw material, and the deformation resistance of the raw material is reduced. The circular arc of the material bearing wheel 15 is larger than the circular arcs of other rollers, the contact points on the bottom diameters of the material bearing wheels 15 at two ends are about 2mm higher than the contact points on the rollers 25 on the middle lower die 20 (because some raw materials are bent), and stable material placing is convenient.
The working principle of the forming tool is shown in fig. 7 and 8:
a manipulator puts a raw material workpiece which is heated to process requirements through intermediate frequency into a groove of a material bearing wheel 15, the material placing positions are adjusted to achieve the consistent sizes of two limbs, a first-order press starts to move downwards, an upper die roller 7 contacts the raw material first, the press continues to move downwards, two ends of the raw material are separated from the material bearing wheel 15 and are contacted with a forming roller 16, an upper die roller 14 contacts the raw material, under the support of a roller 25 on a middle lower die 20 and a lower die cushion block 18, two limbs of an elastic strip are formed through the upper die roller 7 and the forming roller 16, the middle part of the elastic strip is preliminarily formed through the upper die roller 14 (shown in figure 7), because a workpiece angle α (the workpiece angle α is determined by the size and the shape of the product) is larger than an angle β angle on the lower die cushion block 18, the two limbs form a certain angle outwards after forming, and when the press moves upwards, the formed workpiece is stably placed on the lower die by the self.
In the prior art, α is equal to β, and as shown in fig. 3, a material returning mechanism consisting of a material returning block 19, an inner hexagon bolt 20, a material returning guide sleeve 21, a material returning seat 22 and a pressure spring 23 must be added to smoothly place the primary formed workpiece 24 on the lower die.
Claims (10)
1. The utility model provides an preface shaping frock for production of omega type bullet strip which characterized in that: comprises an upper template and a lower template; the upper template is provided with a left upper die, a right upper die and a middle upper die, the left upper die and the right upper die are both provided with upper die rollers, and the middle upper die is provided with a middle upper die roller; the lower die plate is provided with a left lower die base, a right lower die base and a middle lower die, the left lower die base and the right lower die base are respectively provided with a material bearing wheel, a forming roller and a lower die cushion block, and the middle lower die is provided with a middle lower die roller.
2. The one-step forming tool for omega-shaped elastic strip production according to claim 1, characterized in that: grooves are respectively processed on the upper template and the lower template and are respectively used for positioning the left upper die, the right upper die, the middle upper die, the left lower die seat, the right lower die seat and the middle lower die.
3. The one-step forming tool for omega-shaped elastic strip production according to claim 2, characterized in that: the left upper die, the right upper die and the middle upper die are respectively fixed on the upper template through six inner bolts; the left lower die base, the right lower die base and the middle lower die are fixed on the lower die plate through six inner bolts respectively.
4. The one-step forming tool for omega-shaped elastic strip production according to claim 2, characterized in that: the lower die plate is provided with a left positioning block and a right positioning block, the left positioning block and the right positioning block are in threaded connection with jackscrews, one end of each jackscrew props against the lower die base, and the other end of each jackscrew is locked by a nut.
5. The one-step forming tool for omega-shaped elastic strip production according to claim 1, characterized in that: and the middle lower die roller is connected to the middle lower die through a pin shaft.
6. The one-step forming tool for omega-shaped elastic strip production according to claim 5, wherein the one-step forming tool comprises: and the middle and lower die rollers are tightly propped through the inner six bolts.
7. The one-step forming tool for omega-shaped elastic strip production according to claim 1, characterized in that: arc-shaped grooves are formed in the rolling wheels, the material bearing wheels and the lower die cushion blocks.
8. The one-step forming tool for producing the omega-shaped elastic strip according to claim 7, wherein the one-step forming tool comprises: the diameter of the arc is larger than the diameter of the raw material.
9. The one-step forming tool for producing the omega-shaped elastic strip according to claim 8, wherein the one-step forming tool comprises: the circular arc diameter of the material bearing wheel is larger than that of each roller.
10. The one-step forming tool for producing the omega-shaped elastic strip according to claim 9, wherein the one-step forming tool comprises: the contact point between the two ends of the raw material and the bottom diameter of the material bearing wheel is 2mm higher than the contact point between the two ends of the raw material and the bottom diameter of the roller of the middle lower die.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921349080.6U CN210995949U (en) | 2019-08-20 | 2019-08-20 | A preface shaping frock for production of omega type bullet strip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921349080.6U CN210995949U (en) | 2019-08-20 | 2019-08-20 | A preface shaping frock for production of omega type bullet strip |
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| CN210995949U true CN210995949U (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496879A (en) * | 2019-08-20 | 2019-11-26 | 中铁隆昌铁路器材有限公司 | A kind of sequence forming frock and forming method for the production of ω type spring |
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2019
- 2019-08-20 CN CN201921349080.6U patent/CN210995949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496879A (en) * | 2019-08-20 | 2019-11-26 | 中铁隆昌铁路器材有限公司 | A kind of sequence forming frock and forming method for the production of ω type spring |
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