CN111299342A - Head shrinking tool for subminiature semi-hard cable - Google Patents
Head shrinking tool for subminiature semi-hard cable Download PDFInfo
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- CN111299342A CN111299342A CN202010246816.8A CN202010246816A CN111299342A CN 111299342 A CN111299342 A CN 111299342A CN 202010246816 A CN202010246816 A CN 202010246816A CN 111299342 A CN111299342 A CN 111299342A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 60
- 229910052802 copper Inorganic materials 0.000 claims description 60
- 239000010949 copper Substances 0.000 claims description 60
- 238000004080 punching Methods 0.000 claims description 21
- 238000005267 amalgamation Methods 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 238000002788 crimping Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 14
- 238000007906 compression Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004904 shortening Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C5/00—Pointing; Push-pointing
- B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube
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Abstract
The invention relates to a subminiature semi-hard cable head-shrinking tool, which comprises a stamping working module, a stamping driving part, a fixing frame, a sliding frame and a sliding driving part, wherein the stamping working module comprises an upper die and a lower die, and is characterized in that: the upper die is a cuboid with a V-shaped bulge arranged on the lower surface and a positioning hole, the lower die comprises a fixed die and a sliding die, a V-shaped groove matched with the V-shaped bulge of the upper die is arranged on the upper surface of the lower die, the V-shaped groove is formed by splicing the fixed die and the sliding die, the positioning groove and the positioning bulge which are matched with each other are arranged on the splicing surface of the fixed die and the sliding die, a guide groove is arranged on the V-shaped groove, and the groove surface of the guide groove is vertical; in the specific application, the process requirement of the subminiature semi-hard cable outer conductor shrinking head is met by adopting a mode of stamping the shrinking head, and the technical difficulty that large-size semi-hard cable shrinking head equipment cannot adapt to the subminiature semi-hard cable shrinking head is solved.
Description
Technical Field
The invention belongs to the technical field of cable manufacturing, and particularly relates to the technical field of cold machining for pressing a fine copper pipe into a solid body with a smaller external circle radius.
Background
The subminiature semi-hard coaxial cable is a cable with the total outer diameter of less than 1mm, the outer conductor of the subminiature semi-hard coaxial cable is a cable with a copper pipe with the outer diameter of less than 1.4mm and the wall thickness of less than 0.13mm, and the subminiature semi-hard coaxial cable is a new requirement and development trend for the coaxial cable field from the development of miniaturization and integration of electronic equipment to microsystemization. The semi-rigid coaxial cable adopts an ideal coaxial cable structure, so that the cable has outstanding electrical properties such as low attenuation, small standing wave, good shielding performance and the like, and is a widely used coaxial cable structure.
Before the cable is not shrunk, the outer diameter of a copper pipe used by the outer conductor of the used cable is larger than the inner diameter of a cable forming die. The cable outer conductor is formed by passing a copper pipe with an insulating core wire inside through a cable forming die and forming a semi-hard cable finished product after cold drawing. Therefore, the main requirement of the cable end-shrinking is to shrink the cable outer conductor to a size that the size of the external circle of the outer shape is smaller than the size of the inner diameter of the cable forming die, so that the end-shrinking part can conveniently penetrate through the outer conductor forming die. The method is an essential step in the processing process of the outer conductor of the semi-rigid coaxial radio frequency cable and is also a bottleneck encountered in the manufacturing process of the subminiature semi-rigid coaxial cable.
For the semi-rigid coaxial cable with a larger size, because the size and the wall thickness of the raw material copper tube are larger, the hollow copper tube has certain rigidity, and therefore, a head shrinking device which is generally adopted is shown in fig. 1. The main mechanical working part of the large-size semi-hard cable head-reducing equipment consists of a machine base, a sliding block, a pressing plate, a sleeve, a bushing, a central rotor and a mold. The motor drives the central rotor to work, and then the central rotor drives the sliding block, the pressing plate and the die to rotate together. A circular cam structure consisting of 10 sleeves and a bush is formed with a certain protrusion at the sleeve position and a concave pit between the two sleeves. When the central rotor drives the die to move to the position of the sleeve, the die, the sliding blocks and the sleeve are on the same straight line, and the sleeves at two ends can extrude the sliding blocks and further extrude the die, so that compression on the outer conductor of the cable is formed. When the central rotor drives the mold to move to the middle position of the sleeve, the sliding block is separated from the sleeve, and the mold is driven to move towards two sides under the action of centrifugal force, so that the pressure to the outer conductor of the cable is reduced, and even the cable is in a non-contact state. When the outer conductor of the cable is subjected to a small pressure, the cable can be fed into the head reducing device by an external force along the axial direction of the cable until a satisfactory head reducing length is obtained. During operation, the central rotor completes compression once per 36 ° rotation, and the compression state and the release state are shown in fig. 2. After multiple times of compression, the cable outer conductor is pressed into a circle with a size limited by a mould, so that the purpose of head shrinkage is achieved.
Although the equipment has the advantages of continuous working of the machine, high production efficiency, simple operation and the like. However, the disadvantages of this device are also quite pronounced in the production of ultra-small size cables. When the cable size is very small, the push-feed manner using the rigidity of the copper pipe itself becomes difficult to perform. The reason is that: 1) the copper pipe is required to bear certain axial feeding force in the feeding process, and the copper pipe used for the miniature coaxial cable product is small in outer diameter and wall thickness, so that the rigidity is low, and the copper pipe is easy to bend and crush due to stress in the feeding process. 2) When the dies are in a relaxed state, if the gap between the two dies is large, the copper pipe with the subminiature size is easy to slide out from the two dies, so that the copper pipe is directly crushed. Therefore, the end-shortening device adopting the working principle of the large-size semi-hard cable end-shortening device falls into a dilemma.
If the situation that the copper pipe slides out of the die in the compression process is to be avoided, the gap between the dies is required to be reduced during feeding, and the smaller the gap is, the better the gap is; if the force applied to the copper tube during feeding is required to be reduced, the gap between the dies is required to be increased during the feeding state so as to reduce the resistance of the dies to the feeding of the copper tube. Therefore, in order to avoid such a problem, a new reducing tool needs to be designed.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a head shrinking tool suitable for a subminiature semi-hard cable, so as to solve the problems that when the size of the cable is very small, the feeding mode pushed by the rigidity of a copper pipe is difficult to implement, and the copper pipe is difficult to avoid sliding out of a mold in the compression process.
In order to solve the above technical problem, the technical solution of the present invention is realized as follows:
the utility model provides a first instrument that contracts of subminiature semihard cable, includes punching press work module and punching press drive part, mount, carriage, slip drive part, punching press work module includes mould and lower mould, its characterized in that: go up mould 4 and be provided with the protruding cuboid that just is provided with the locating hole of V-arrangement for the lower surface, the lower mould includes fixed mould 3, sliding die 6, the lower mould upper surface be provided with the protruding complex V-arrangement groove of V-arrangement of last mould 4, the V-arrangement groove is by fixed mould 3, sliding die 6 amalgamation forms, fixed mould 3 is provided with constant head tank and the location arch of mutually supporting with the 6 amalgamation face of sliding die, the V-arrangement groove is provided with the guide slot, the guide slot groove face is vertical face, the guide slot is cut apart into the three-section with the V-arrangement groove, the top section in V-arrangement groove is the trapezoidal form, V-arrangement groove guide slot section width is.
Further, the arrangement positions of the V-shaped groove and the V-shaped protrusion can be replaced by: the lower surface of the upper die 4 is provided with a V-shaped groove, the upper surface of the lower die is provided with a V-shaped bulge matched with the V-shaped groove of the upper die 4, and the V-shaped bulge is formed by splicing the fixed die 3 and the sliding die 6.
Furthermore, the punching driving component is fixedly connected with the upper die 4, the fixed frame comprises a fixed die support 2 and a base 1, the fixed die 3 is fixed on the fixed die support 2, and the fixed die support 2 is fixed on the base 1.
Furthermore, the sliding driving part comprises a screw fixing frame 8, a screw 9, a handle 10 and an end cover 11, the screw fixing frame 8 is fixed on the base 1, the screw 9 is fixedly connected with the handle 10 through a pin, and a shaft shoulder part of the screw 9 is arranged in a cavity formed by the screw fixing frame 8 and the end cover 11.
Further, the sliding die 6 is fixed with the sliding frame 7 through screws and connected with the screw 9 through threads, the fixed die support 2, the fixed die 3 and the screw fixing frame 8 are all fixed on the base 1, and the sliding driving part is fixed on the screw fixing frame 8 and connected with the sliding frame.
Furthermore, a stamping guide rod 5 is respectively fixed on the fixed die 3 and the sliding die 6, the upper die is provided with a stamping guide rod through hole, and the two stamping guide rods 5 arranged on the upper die are respectively matched with the through holes in the upper die in position.
Furthermore, the angle of the V-shaped groove is theta, the width of the V-shaped groove is b1, the height of the guide groove is h1, the width b1 of the V-shaped groove is b1 which is D + (0.05-0.10) D,
the height h1 of the guide groove is (1.3-1.5) x (1+ sin (theta/2)) × D (1),
wherein D is the outer diameter of the hollow copper tube needing head contraction and is 0.5-2 mm, theta is the angle of the V-shaped groove, and the value range of the angle theta of the V-shaped groove is 50-70 degrees.
Furthermore, the width of the positioning groove is b2, the height is h2, and the chamfer size is C2, wherein the depth h2 of the positioning groove is h2 ═ 1.5-1.8 × b1+2 × C2.
Furthermore, the matching contact surfaces of the V-shaped protrusions and the V-shaped grooves are quenching treatment surfaces.
The invention can bring the following beneficial effects:
compared with large-size semi-hard cable head shrinking equipment, the head shrinking tool for the subminiature semi-hard cable disclosed by the invention has the advantages that the problem that the two difficulties are met in the head shrinking process of the die gap of the large-size semi-hard cable head shrinking equipment is solved by adopting a stamping head shrinking mode in specific application, the process requirement of the subminiature semi-hard cable outer conductor head shrinking is met, the technical difficulty that the large-size semi-hard cable head shrinking equipment cannot adapt to the subminiature semi-hard cable head shrinking is solved, the design scheme of a secondary stamping mode is adopted specifically aiming at the characteristics of small wall thickness, small outer diameter and low rigidity of an ultra-small copper pipe, the ultra-small copper pipe is placed in a V-shaped groove before cable stamping, and the working mode of stamping when the large-size semi-hard cable head shrinking equipment feeds is avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of the main working parts of a conventional large-size semi-rigid cable head-retracting device;
FIG. 2 is a schematic view of the operation principle of the main working part of the conventional large-size semi-rigid cable head-retracting device;
fig. 3 is a schematic perspective view of the subminiature semi-rigid coaxial cable end-retracting tool assembly of the present invention;
fig. 4 is a schematic view of the general assembly plan of the subminiature semi-rigid coaxial cable end shortening tool of the present invention;
FIG. 5 is a schematic diagram of the assembly structure of the stamping working module according to the present invention;
FIG. 6 is a schematic view of a disassembled structure of the punching module according to the present invention;
FIG. 7 is a schematic view of a stamped work fixed mold configuration of the present invention;
FIG. 8 is a schematic view of the upper die structure for stamping operation according to the present invention;
fig. 9 is a schematic view illustrating an application principle of the ultra-small semi-rigid coaxial cable retracting tool according to the present invention;
1 base 2 fixed mould bracket 3 fixed mould 4 upper mould 5 stamping guide bar 6 sliding mould 7 sliding mould 8 screw rod fixed mount 9 screw rod 10 handle 11 end cap
Detailed Description
To further illustrate the technical means, creation features, achievement objects and effects of the present invention, the following detailed description will be made on the specific implementation, structure, features and effects of the head retracting tool for the subminiature semi-rigid cable according to the present invention with reference to the accompanying drawings and preferred embodiments.
The utility model provides a first instrument that contracts of subminiature semihard cable, including the punching press work module, and punching press drive assembly, the mount, the carriage, the slip drive assembly, the punching press work module includes mould and lower mould, it is protruding and be provided with the cuboid of locating hole to go up mould 4 to be provided with the V-arrangement for the lower surface, the lower mould includes fixed mould 3, sliding die 6, the lower mould upper surface is provided with the V-arrangement protruding complex V-arrangement groove with last mould 4, the V-arrangement groove is by fixed mould 3, sliding die 6 amalgamation forms, fixed mould 3 and 6 amalgamation faces of sliding block mould are provided with mutually supported constant head tank and location arch, the V-arrangement groove is provided with the guide slot, the guide slot face is vertical face, the guide slot is divided into the three-section with the V-arrangement groove, the most upper segment cross-section in V-. The punching driving part is fixedly connected with the upper die 4, the fixing frame comprises a fixed die support 2 and a base 1, the fixed die 3 is fixed on the fixed die support 2, and the fixed die support 2 is fixed on the base 1. The punching driving component is fixedly connected with the upper die 4, the fixing frame comprises a fixed die support 2 and a base 1, the fixed die 3 is fixed on the fixed die support 2, the fixed die support 2 is fixed on the base 1, the sliding driving component comprises a screw rod fixing frame 8, a screw rod 9, a handle 10 and an end cover 11, the screw rod fixing frame 8 is fixed on the base 1, the screw rod 9 is fixedly connected with the handle 10 through a pin, the shaft shoulder part of the screw rod 9 is arranged in a cavity formed by the screw rod fixing frame 8 and the end cover 11, the sliding die 6 is fixed with the sliding frame 7 through a screw and is connected with the screw rod 9 through a thread, the fixed die support 2, the fixed die 3 and the screw rod fixing frame 8 are all fixed on the base 1, the sliding driving component is fixed on the screw rod fixing frame 8 and is connected with the sliding frame, a, two stamping guide rods 5 arranged on the upper die are respectively matched with the positions of the through holes in the upper die.
In embodiment 2, the arrangement positions of the V-shaped grooves and the V-shaped protrusions can be replaced by: the lower surface of the upper die 4 is provided with a V-shaped groove, the upper surface of the lower die is provided with a V-shaped bulge matched with the V-shaped groove of the upper die 4, and the V-shaped bulge is formed by splicing the fixed die 3 and the sliding die 6.
In the two embodiments, it should be particularly noted that the present invention designs the size and position of the V-shaped groove and the positioning groove as follows:
(1) v-groove design
The V-shaped groove is a stamping die for stamping the cable outer conductor into a V shape for the first time, and the dimensional requirements are shown in the upper die structure diagram of fig. 6. Critical dimensions include: the angle of the V-shaped groove is theta, the width of the V-shaped groove is b1, and the height of the guide groove is h 1. The parameter directly influences the effect of the first V-shaped stamping of the cable, and the relation is whether the final head-shrinking size can meet the requirements of the head-shrinking process.
Because the subminiature copper tube has certain bending deformation in a natural state, a section of guide groove is required to be added in front of the V-shaped groove to ensure that the copper tube is completely in a stamping die before compression, and the width b1 of the V-shaped groove is taken
b1＝D+(0.05～0.10)×D
Or expressed as 1.05 XD. ltoreq. b 1. ltoreq.1.10 XD
Wherein D is the outer diameter of the hollow copper pipe needing head contraction, and the value is reduced according to the increase of the hollow copper pipe D.
The height h1 of the guide groove is taken as:
h1＝(1.3～1.5)×(1+sin(θ/2))×D
or 1.3(1+ sin (theta/2)). times.D.ltoreq.h 1.ltoreq.1.5 (1+ sin (theta/2)). times.D
D is the outer diameter of the hollow copper pipe needing head contraction, and theta is the angle of the V-shaped groove.
The value range of the angle theta of the V-shaped groove is 50-70 degrees, and the V-shaped groove is not beneficial to stamping when the angle theta is too large or too small.
In one embodiment of the present invention, D ═ 1.00; θ is 60 °; h1 ═ 2; b1 is 1.1.
(2) Positioning groove design
Since the subminiature copper tube has low rigidity and can cause bending deformation under the self weight of the subminiature copper tube, the movement of the subminiature copper tube in the stamping process is reduced as much as possible. When a subminiature semi-hard cable head-shrinking tool is designed, the V-shaped groove is divided into a fixed die and a sliding die, and after the first punching is finished, the cable head-shrinking is finished through the punching between the sliding die and the fixed die, so that the movement of a copper pipe is reduced, and the rotation of the copper pipe is avoided. In order to ensure the flatness of the upper end surfaces of the fixed die and the sliding die when the fixed die and the sliding die are combined into the lower die, a positioning groove is designed between the fixed die and the sliding die.
As shown in fig. 5, the width of the positioning groove is b2, the height is h2, and the chamfer dimension is C2. Wherein the height h2 of the positioning groove is an important size
h2＝(1.5～1.8)×b2+2×C2
Or expressed as 1.5 × b2+2 × C2 ≤ h2 ≤ 1.8 × b2+2 × C2
In one embodiment of the present invention, C2 ═ 1; h2 ═ 10; b2 is 5.
In addition, in the above embodiment, the mating contact surfaces of the V-shaped protrusion and the V-shaped groove are both quenched surfaces.
The use and technical effects of the device of the invention are explained as follows:
the main forming die of the subminiature semi-hard coaxial cable head-reducing tool consists of a fixed die, a sliding die and an upper die, as shown in figures 3 and 4. The fixed die 3 is arranged on a fixed frame, the sliding die 6 is arranged on a sliding frame 7 and is connected with a sliding drive, and the upper die 4 is directly connected with a stamping drive. At the beginning, the fixed die 3 and the sliding die 6 are driven to make the two closely contact to form a lower die, and a forming die for processing the cable outer conductor is formed in a V-shaped groove in the middle of the two. The end surfaces of the fixed die 3 and the lower die formed by the sliding die 6 at the upper end are ensured to be in the same plane by the protruding part between the two. Then, the first stamping work of the upper die 4 stamps the cable outer conductor into a V shape, so that the cable outer conductor is conveniently stamped into a solid. The centering between the upper die 4 and the lower die is ensured by the protruding portion between the upper die and the slide die 6. And after the upper die 4 is stamped, the original position is automatically recovered. And finally, in the loosening process of the sliding die 6, the V-shaped semi-finished product of the cable is placed between the fixed die 3 and the sliding die 6, the sliding die 6 completes secondary stamping under the action of stamping driving, and the V-shaped copper pipe is compressed into the final formed necking semi-finished product.
The subminiature semi-rigid coaxial cable head shrinking tool is similar to large-size semi-rigid cable head shrinking equipment in that the purpose of reducing the outer diameter is achieved by applying pressure in the direction perpendicular to the outer conductor of the cable to enable the outer conductor of the cable to generate plastic deformation. The subminiature semi-hard coaxial cable shrinking head adopts a design scheme of a secondary stamping mode aiming at the characteristics of small wall thickness, small outer diameter and low rigidity of a super-small-size copper pipe, and is placed in a V-shaped forming groove before the cable is stamped, so that the working mode of stamping when large-size semi-hard cable shrinking head equipment is fed is avoided. Fig. 1 is a structural schematic diagram of the main working part of large-size semi-rigid cable head-retracting equipment. Fig. 2 is a schematic view of the working principle of the large-size semi-hard cable head-shrinking device. As can be seen, a large feed force is required during operation to enable the cable to extend in the axial direction, since it is rotated by 36 ° for one compression.
Fig. 5 to 8 are structural views of the punching operation module in which the fixed die is shown in an outline of a rectangular parallelepiped with a half V-shaped groove and a positioning hole. The V-shaped groove is a working area for cable head shrinking punching, is a main design point of a subminiature semi-hard cable head shrinking tool, and the secondary punching between the sliding die and the fixed die is the final step of a cable head shrinking process. The length a of the fixed die depends on the length of the shrinking head required in production; the width of the V-shaped groove is determined by the diameter D of the outer conductor of the cable needing to be subjected to head shrinking, and in order to enable the copper pipe to be conveniently placed into the V-shaped groove, the groove width b needs to be slightly larger than the diameter D. The angle theta of the V-shaped groove is directly related to the effect of stamping, the difficulty of secondary stamping is increased if the value is too large, and the processing difficulty of the upper die and the effect of primary stamping may be caused if the value is too small.
The sliding die is similar to the fixed die in shape, the sizes and the structural forms of the V-shaped groove and the positioning hole are consistent with those of the fixed die, the positioning groove structure of the sliding die is changed into a bulge, the size is consistent with that of the fixed die, and the position of the chamfer is provided with a convex sharp corner. The upper mold is a cuboid with V-shaped protrusions and positioning holes, as shown in FIG. 6. The V-shaped protruding structure is matched with a V-shaped groove formed by a lower die consisting of a sliding die and a fixed die, the structure size is consistent, the first punching of the cable shrinkage head is completed through punching driving, and the cable outer conductor is punched into a V shape.
The subminiature semi-hard cable head-shrinking tool consists of a stamping working module group consisting of the three main dies and a stamping drive matched with the stamping working module group. The fixed die is fixed on the base through bolts, the sliding die and the upper die are respectively connected with mutually vertical stamping driving mechanisms, and the cable outer conductor shrinking head is completed through the matching of the driving chambers.
Fig. 9 is a schematic view of the working principle of the present invention, showing the process of copper pipe stamping deformation, the present invention is designed to ensure that the upper die can stamp along the guide rod when the fixed die and the sliding die set form the lower die stamping, and the upper die completes the action of stamping the copper pipe into V-shape through the guiding of the stamping guide rod. It can be seen from the figure that after a hollow copper pipe with a proper size is punched twice, the diameter of the circumscribed circle of the external shape of the hollow copper pipe is smaller than that of the original copper pipe, so that the purpose of reducing the external diameter of the copper pipe can be achieved. Specifically, a copper pipe is firstly placed in a V-shaped lower die with a straight groove at the upper part, and the copper pipe is plastically deformed into a V shape through the punching of an upper die and the lower die. At this time, the diameter of the circumscribed circle of the V shape still cannot meet the size requirement of the cable head shrinking process, and the V-shaped copper pipe needs to be further punched. The lower die is separated left and right through the sliding of the sliding die, and the V-shaped copper pipe is moved downwards to the position below the V-shaped groove. And finally, completing the stamping action by moving the sliding die to the left. The stamping deformation process of the copper tube is shown in fig. 8.
In addition, the key point of the mold processing of the present invention is that three molds are cut by the wire cutting method as shown in fig. 4, so as to ensure that the size of the V-shaped groove of the mold and the size of the positioning groove are respectively matched with each other on the three molds, and both ends of the positioning groove need to be finished by a fitter to obtain higher finish on the fixed mold and the sliding mold positioning groove.
The subminiature semi-hard cable head-shrinking tool adopts a stamping mode to deform the copper pipe, and changes the original hollow copper pipe state into a folded solid state, so as to achieve the purpose of reducing the outer diameter, and the theoretical feasibility of the subminiature semi-hard cable head-shrinking tool is shown in fig. 8. In an embodiment, the left copper pipe in the drawing is a copper pipe with the diameter of 1mm and the wall thickness of 0.1mm, and after two times of stamping, the diameter of the circumscribed circle of the outer shape can reach about 0.8mm, thereby meeting the process requirements of production and manufacturing of the subminiature semi-hard cable. Taking the necking of a copper tube with a diameter of 1mm and a wall thickness of 0.1mm as an example, the cross-sectional area S of the copper tube can be obtained before stamping.
S＝πδ(D-δ)
In the formula, D is the outer diameter of the copper pipe; delta is the copper tube wall thickness.
Assuming that the outer shape of the copper pipe after stamping is a solid circle, the outer diameter D' of the copper pipe can be calculated. By calculation, D' is 0.6 mm. Assuming that the shape of the copper pipe after stamping is a rectangle with the side length of 0.4mm, the side length of the other side of the copper pipe can be calculated to be 0.7mm through equal cross sections, and the diameter of the circumscribed circle of the rectangle is 0.81 mm. Therefore, the scheme that the stamping mode is used for applying stamping force in the direction vertical to the axis of the copper pipe so that the copper pipe deforms to reduce the outer diameter of the copper pipe is theoretically feasible.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a first instrument that contracts of subminiature semihard cable, includes punching press work module and punching press drive part, mount, carriage, slip drive part, punching press work module includes mould and lower mould, its characterized in that: go up mould (4) and be provided with the protruding cuboid that just is provided with the locating hole of V-arrangement for the lower surface, the lower mould includes fixed mould (3), sliding die (6), the lower mould upper surface be provided with the protruding complex V-arrangement groove of V-arrangement of going up mould (4), the V-arrangement groove by fixed mould (3), sliding die (6) amalgamation form, fixed mould (3) and sliding block mould (6) amalgamation face are provided with mutually supporting constant head tank and location arch, the V-arrangement groove is provided with the guide slot, the guide slot groove face is vertical face.
2. A subminiature semi-hard cable crimping tool according to claim 1, wherein said V-shaped groove and V-shaped protrusion are disposed at positions replaced with: go up mould (4) lower surface and be provided with the V-arrangement groove, the lower mould upper surface is provided with and goes up mould (4) V-arrangement groove complex V-arrangement arch, the V-arrangement arch by fixed mould (3), sliding die (6) amalgamation form.
3. A subminiature semi-hard cable crimper tool according to claim 1 or 2, further comprising: the stamping driving part is fixedly connected with the upper die (4), the fixing frame comprises a fixed die support (2) and a base (1), the fixed die (3) is fixed on the fixed die support (2), and the fixed die support (2) is fixed on the base (1).
4. A subminiature semi-hard cable crimper tool, according to claim 3, wherein: the sliding driving part comprises a screw fixing frame (8), a screw (9), a handle (10) and an end cover (11), the screw fixing frame (8) is fixed on the base (1), the screw (9) is fixedly connected with the handle (10) through a pin, and a shaft shoulder part of the screw (9) is placed in a cavity formed by the screw fixing frame (8) and the end cover (11).
5. A subminiature semi-hard cable crimper tool, according to claim 4, wherein: the sliding die (6) is fixed with the sliding frame (7) through screws and is connected with the screw rod (9) through threads, the fixed die support (2), the fixed die (3) and the screw rod fixing frame (8) are all fixed on the base (1), and the sliding driving part is fixed on the screw rod fixing frame (8) and is connected with the sliding frame.
6. A subminiature semi-hard cable crimper tool, according to claim 5, wherein: the fixed die (3) and the sliding die (6) are respectively fixed with a stamping guide rod (5), the upper die is provided with a stamping guide rod through hole, and the two stamping guide rods (5) arranged on the upper die are respectively matched with the through holes in the upper die in position.
7. A subminiature semi-hard cable crimper tool according to claim 1 or 2, further comprising: the angle of the V-shaped groove is theta, the width of the V-shaped groove is b1, the height of the guide groove is h1, the width b1 of the V-shaped groove is b 1-D + (0.05-0.10) D,
the height h1 of the guide groove is (1.3-1.5) x (1+ sin (theta/2)) × D (1),
d is the outer diameter of the hollow copper pipe needing head contraction and is 0.5-2 mm, theta is the angle of the V-shaped groove, and the value range of the angle theta of the V-shaped groove is 50-70 degrees.
8. A subminiature semi-hard cable crimper tool, according to claim 7, wherein: the width of the positioning groove is b2, the height of the positioning groove is h2, and the chamfer size is C2, wherein the depth h2 of the positioning groove is h2 ═ 1.5-1.8 (x b1+2 x C2).
9. A subminiature semi-hard cable crimper tool according to claim 1 or 2, further comprising: the matched contact surfaces of the V-shaped protrusions and the V-shaped grooves are quenching treatment surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010246816.8A CN111299342A (en) | 2020-03-31 | 2020-03-31 | Head shrinking tool for subminiature semi-hard cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010246816.8A CN111299342A (en) | 2020-03-31 | 2020-03-31 | Head shrinking tool for subminiature semi-hard cable |
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| CN111299342A true CN111299342A (en) | 2020-06-19 |
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| CN202010246816.8A Pending CN111299342A (en) | 2020-03-31 | 2020-03-31 | Head shrinking tool for subminiature semi-hard cable |
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