CN117245898A - Manufacturing process of coated spring - Google Patents
Manufacturing process of coated spring Download PDFInfo
- Publication number
- CN117245898A CN117245898A CN202311258715.2A CN202311258715A CN117245898A CN 117245898 A CN117245898 A CN 117245898A CN 202311258715 A CN202311258715 A CN 202311258715A CN 117245898 A CN117245898 A CN 117245898A
- Authority
- CN
- China
- Prior art keywords
- spring
- pipe
- cladding
- iron rod
- heating
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000005253 cladding Methods 0.000 claims abstract description 51
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000001125 extrusion Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/12—Bending or folding helically, e.g. for making springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/10—Closing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/774—Springs
- B29L2031/7742—Springs helical springs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
Abstract
The invention discloses a manufacturing process of a coated spring, which comprises the following steps: s01, winding a straight pipe on an iron rod according to the design requirement of a spring, and fixing two ends of the straight pipe; s02, placing an iron rod and a straight pipe wound on the iron rod into an oven for heating to form a cladding pipe; s03, cutting off two ends of the cladding pipe for fixing, and sleeving the spring into the shaped cladding pipe; s04, heating two ends of the cladding pipe, and putting the cladding pipe with the two heated ends into an extrusion die for extrusion molding to finish sealing the two ends of the cladding pipe; through the cladding spring of this technology preparation, can select suitable thickness as required, through the toughness root after toasting better, the wholeness of straight tube is good brings better anti medium permeability, and the surface is smooth moreover, can not fracture after the port is sealed.
Description
Technical Field
The invention relates to the technical field of spring cladding, in particular to a manufacturing process of a cladding spring.
Background
The coated spring is widely used in the industries of electric, automobile, chemical industry and the like, a plastic layer is coated outside the spring, and plastic with the performances of flame retardance, water resistance, heat insulation, skid resistance, insulation, corrosion resistance and the like is selected according to the requirement, and after the coated spring is coated on the spring, the spring also has the performances of flame retardance, water resistance, heat insulation, skid resistance, insulation, corrosion resistance and the like due to the protection of the outer plastic layer, at present, the coated spring is manufactured in a single mode, is usually sleeved in the spring by using a heat shrinkage sleeve and is sintered and molded in a sintering furnace, and the coated spring manufactured in the manufacturing mode has the advantages of extremely thin thickness, easiness in cracking, poor medium permeability resistance, easiness in wrinkling of the surface and easiness in cracking of port sealing.
Disclosure of Invention
The invention aims to provide a manufacturing process of a cladding spring, which solves the problems that the cladding spring manufactured by the existing cladding spring is too thin in thickness, easy to crack, poor in medium permeability resistance, easy to wrinkle on the surface, easy to crack in port sealing and the like.
The invention is realized by the following technical scheme.
The invention relates to a manufacturing process of a coated spring, which comprises the following steps:
s01, winding a straight pipe on an iron rod according to the design requirement of a spring, and fixing two ends of the straight pipe;
s02, placing an iron rod and a straight pipe wound on the iron rod into an oven for heating to form a cladding pipe;
s03, cutting off two ends of the cladding pipe for fixing, and sleeving the spring into the shaped cladding pipe;
and S04, heating the two ends of the cladding pipe, and putting the cladding pipe with the heated two ends into an extrusion die for extrusion molding to finish sealing the two ends of the cladding pipe.
Further, the straight tube inner diameter is larger than the spring wire diameter.
Further, the outer diameter of the iron rod is smaller than the inner diameter of the spring minus the thickness of the two straight tube walls, and the length of the iron rod is larger than the total length of the spring.
Further, the heating temperature and time in the oven are adjusted according to the material of the plastic, and the heating temperature is smaller than the melting temperature.
Further, the extrusion die is a conical die, and the taper is not more than 45 degrees.
Further, the maximum inner diameter of the mold should be larger than the maximum outer diameter of the plastic clad pipe of the same kind.
The invention has the beneficial effects that: the process for manufacturing the coated spring is suitable for manufacturing coated springs made of a plurality of plastic materials, the used tools and dies are simple and low, the processing and molding time is short, the efficiency is high, the operation is simple and easy, the molding time is not long, the coated spring manufactured by the process can be selected to be of proper thickness according to requirements, the toughness root is better after baking, the integrity of a straight pipe is good, the medium permeability is better, the surface is smooth, and the port is not cracked after sealing.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a cladding tube according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a process for sealing a clad pipe according to an embodiment of the invention.
Detailed Description
The invention will now be described in detail with reference to fig. 1-2, wherein for convenience of description, the orientations described below are now defined as follows: the vertical, horizontal, front-rear directions described below are identical to the vertical, horizontal, front-rear directions of the projection relationship of fig. 1 itself.
The manufacturing process of the coated spring is described with reference to the accompanying drawings 1-2, wherein S01, a straight pipe is wound on an iron rod according to the design requirement of the spring, and two ends of the straight pipe are fixed;
s02, placing an iron rod and a straight pipe wound on the iron rod into an oven for heating to form a cladding pipe;
s03, cutting off two ends of the cladding pipe for fixing, and sleeving the spring into the shaped cladding pipe;
and S04, heating the two ends of the cladding pipe, and putting the cladding pipe with the heated two ends into an extrusion die for extrusion molding to finish sealing the two ends of the cladding pipe.
The straight pipe is wound on the iron rod according to the shape (pitch) of the spring, two ends of the straight pipe are fixed with the iron rod, the whole straight pipe is vertically placed into the oven, and the straight pipe is taken out after being heated for a period of time, so that the shaped cladding pipe can be obtained.
The two ends of the straight pipe are preferably attached and fixed on the iron rod in a vertical shape parallel to the iron rod, and the coated pipe after baking and molding is conveniently taken down from the iron rod during subsequent baking and heating.
When the straight tube is selected, the inner diameter of the straight tube is slightly larger than the wire diameter of the spring, the thickness can be selected according to the application, but the straight tube is not excessively thin, otherwise, the straight tube can possibly generate concave deformation during shaping, and the inner diameter of the straight tube is slightly larger than the wire diameter of the spring, so that the spring can be conveniently sleeved in the cladding tube in the follow-up process.
When the iron rod is selected, the outer diameter is slightly smaller than the inner diameter of the spring by the thickness of the two straight tube walls, the length of the iron rod is greater than the total length of the spring, and the outer diameter of the iron rod is slightly smaller than the inner diameter of the spring by the thickness of the two straight tube walls so that the cladding tube corresponds to the spring in size, and the iron rod can be well adapted, and the length of the iron rod is greater than the length of the spring, so that the iron rod can be conveniently fixed and taken out during baking.
The heating temperature and time in the oven are adjusted according to the material of the straight pipe, the heating temperature should not exceed the melting temperature of the straight pipe, and the heating purpose is to keep the deformation of the straight pipe stable for a long time and release the internal stress when the straight pipe is wound on the iron rod.
The two ends of the cladding pipe, which are used for being fixed on the iron rod, are removed, the spring is sleeved into the shaped cladding pipe, and the two ends of the cladding pipe need to be sealed at the moment, so that the spring is prevented from sliding out of the cladding pipe when the cladding pipe is used for a long time.
The method comprises the steps of preparing different extrusion molding dies in advance for cladding pipes sleeved with springs with different external dimensions, heating pipe orifices by using heating equipment, and extruding and molding the plastic at the ports of the cladding pipes into the extrusion dies after the plastic at the ports of the cladding pipes is melted, wherein the ports of the cladding pipes and the ports of the springs are fixed into a whole.
The extrusion forming die is designed into a cone shape, the taper is not more than 45 degrees, the pipe orifice of the cladding pipe is extruded in a molten state, the pipe orifice of the cladding pipe can form a self-seal under the cooperation of the extrusion forming die, and the maximum inner diameter of the die is larger than the maximum outer diameter of the cladding pipe of the same kind of plastic so as to be suitable for cladding pipes of different specifications of the same kind of plastic, and different kinds of plastic are required to be different dies.
During the heating process, only the port portion is heated, and if the two ends of the spring are designed to be relatively close to the middle ring, the port is located in other areas of the cladding tube suitable for heating without damage due to proper separation by a tool.
When the port is transparent and round, the state of the port is observed at the moment of heating, and the port is molten to a state capable of being molded, and the port is extruded in a heated molding die slowly and quickly, namely, the port of the cladding pipe is contracted inwards and then sealed quickly, and the port can be rotated properly in the extrusion process, so that the sealed port is smoother.
Specific example 1:
taking the standard spring of I SO/TC 227 as an example for cladding:
the spring (I SO/TC 227) is a general cylindrical compression spring, the diameter of the spring is 50mm, the wire diameter is 4mm, the length is 112mm, the pitch is 20mm, and the number of turns is 6.
Straight tube size, thickness 0.5mm, external diameter 6mm (internal diameter 5mm, greater than spring internal diameter 4 mm), length 1000mm (must be greater than spring length 950 mm).
The iron rod is sized, 150mm long (112 mm longer than the spring), 43mm outside diameter (slightly smaller than the spring diameter minus the outside diameter of the straight tube).
The heating equipment adopts a hot air gun (other equipment with standard power and no overlarge heating area can be selected).
The extrusion die size, the maximum inner diameter (i.e. the diameter of the cone bottom circle) is 12mm, and the taper is 45 degrees.
The preparation process comprises the following steps:
according to the manufacturing steps, the straight pipe is wound on the iron rod according to the shape of the spring, after the two ends of the straight pipe are fixed, the straight pipe is vertically placed into the oven for heating and shaping, and after shaping, the coated pipe is taken down from the iron rod.
Subtracting the parts of the two ends of the cladding pipe for fixing, heating one of the ports, heating the die at the same time, and extruding and forming at high temperature in the extrusion die when the ports are about to be melted.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement it without limiting the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (6)
1. A manufacturing process of a coated spring is characterized by comprising the following steps of:
s01, winding a straight pipe on an iron rod according to the design requirement of a spring, and fixing two ends of the straight pipe;
s02, placing an iron rod and a straight pipe wound on the iron rod into an oven for heating to form a cladding pipe;
s03, cutting off two ends of the cladding pipe for fixing, and sleeving the spring into the shaped cladding pipe;
and S04, heating the two ends of the cladding pipe, and putting the cladding pipe with the heated two ends into an extrusion die for extrusion molding to finish sealing the two ends of the cladding pipe.
2. The process for manufacturing the coated spring according to claim 1, wherein: the inner diameter of the straight pipe is larger than the wire diameter of the spring.
3. The process for manufacturing the coated spring according to claim 1, wherein: the outer diameter of the iron rod is smaller than the inner diameter of the spring minus the thickness of the two straight tube walls, and the length of the iron rod is larger than the total length of the spring.
4. The process for manufacturing the coated spring according to claim 1, wherein: the heating temperature and time in the oven are adjusted according to the material of the plastic, and the heating temperature is less than the melting temperature.
5. The process for manufacturing the coated spring according to claim 1, wherein: the extrusion die is a conical die, and the taper is not more than 45 degrees.
6. The process for manufacturing the coated spring according to claim 1, wherein: the maximum inner diameter of the mould should be larger than the maximum outer diameter of the plastic clad pipe of the same kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311258715.2A CN117245898A (en) | 2023-09-27 | 2023-09-27 | Manufacturing process of coated spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311258715.2A CN117245898A (en) | 2023-09-27 | 2023-09-27 | Manufacturing process of coated spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117245898A true CN117245898A (en) | 2023-12-19 |
Family
ID=89130948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311258715.2A Pending CN117245898A (en) | 2023-09-27 | 2023-09-27 | Manufacturing process of coated spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117245898A (en) |
-
2023
- 2023-09-27 CN CN202311258715.2A patent/CN117245898A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |