CN106964748A - The processing method and its processing tool of piston rod - Google Patents
The processing method and its processing tool of piston rod Download PDFInfo
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- CN106964748A CN106964748A CN201710180611.2A CN201710180611A CN106964748A CN 106964748 A CN106964748 A CN 106964748A CN 201710180611 A CN201710180611 A CN 201710180611A CN 106964748 A CN106964748 A CN 106964748A
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- hole
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- red pin
- red
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K7/00—Making railway appurtenances; Making vehicle parts
- B21K7/12—Making railway appurtenances; Making vehicle parts parts for locomotives or vehicles, e.g. frames, underframes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/243—Perforating, i.e. punching holes in profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention provides the processing method and its processing tool of a kind of piston rod, including blanking；Preforming head；Head positioning hole is gone out, while processing afterbody chamfering；Head is molded, meanwhile, punching forms afterbody positioning hole, and afterbody positioning hole and head positioning hole are concentric；Pulling eye, and pulling eye is rushed in progress simultaneously at two ends；Instantly hole depth in place after, protected in thimble built in lower opening, in continuation hole stretch, make intermediate connections stay certain thickness H not get through；Wear gross weight, formed product.Processing tool includes mould, red pin, undershoot needle and limit assembly.The present invention is molded successively using finish draw wire rod on multistage cold former, has overturned conventional fabrication processes, drastically reduce the area manufacturing process, efficiency improves decades of times, and intensity is high, and highly reliable, manufacturing cost is low, remarkable benefit.
Description
Technical field
The present invention relates to piston rod technical field, the processing method and its processing tool of more particularly to a kind of piston rod.
Background technology
It is general that the cylindrical hole (inner cylinder face) that hole depth exceedes 5 times of aperture is referred to as deep hole.And the ratio in hole depth and aperture,
Referred to as " draw ratio " or " aspect ratio ".Comparatively, draw ratio is not more than 5 times of cylindrical hole, can be described as " shallow bore hole ".For
Typically it is processed for deep hole by the way of milling or brill, and is then to add for the deep hole that hole depth and diameter ratio are more than 10
The difficult point of work and forbidden zone.
Oleo damper piston rod is a critical component on motorcycle, electric bicycle, automobile etc., piston
Bar mainly includes piston and bar two parts, and its traditional manufacturing process is by piston and bar by the way of individually processing, to use
Steel-pipe welding or riveting molding, production process are more, and intensity difference, efficiency is low, and two parts are difficult to centering when being attached, even
Connect poor reliability, the junction of piston and bar is fragile, there is potential safety hazard in vehicle travel process.
The content of the invention
The technical problems to be solved by the invention are：In order to overcome deficiency of the prior art, the present invention provides a kind of living
The processing method and its processing tool of stopper rod, new technology are molded successively using finish draw wire rod on multistage cold former, are overturned
Conventional fabrication processes, drastically reduce the area manufacturing process, efficiency improves decades of times, and intensity is high, highly reliable, is manufactured into
This low, remarkable benefit.
The present invention solves its technical problem technical scheme to be taken：A kind of processing method of piston rod, the work
Stopper rod includes head and the bar portion of integrally connected, and the piston rod inner is provided with upper hole and lower opening vertically, and the upper hole is with
Hole extends inward and connected from upper and lower ends respectively, and the processing method comprises the following steps,
Step 1：Blanking, according to the product of different size from corresponding smart drum member, needed for smart drum member is cut into
Want the bar of length；It is preferred to use the cut-out structure that cold headers carry to be automatically cut off.
Step 2：On the preforming head in bar one end；One end cold-heading using cold headers to bar, preliminarily forms head
Shape, now head shape is in approximately up-small and down-big taper.
Step 3：Head positioning hole is gone out on preforming head using red pin, while the tail end in bar portion is processed
Afterbody chamfering；Using the mould with closing in, afterbody chamfering is gone out with the direct cold-heading of cold headers, chamfering is easy in the closing in of mould
Shaping, now the profile on head is to go out the preforming positioning hole in head in the middle of cylinder, cylindrical end face.
Step 4：Continuation, which uses the red pin in step 3 to continue punching press centered on the center in head positioning hole, makes head
Shaping, forms the inner hexagonal hole on head, meanwhile, afterbody positioning hole, and afterbody positioning hole and head are formed using undershoot needle punching
Positioning hole is concentric；
Step 5：Hole rushes pulling eye, undershoot needle in replacing red pin and undershoot needle, red pin alignment head positioning hole progress
Alignment afterbody positioning hole carries out the pulling eye that rushes of lower opening, and two ends carry out rushing pulling eye simultaneously；
Step 6：Instantly hole depth in place after, protected in thimble built in lower opening, change red pin and simultaneously continue upper hole stretching,
Intermediate connections are made to stay certain thickness H not get through；It is preferred that reserved thickness H can be 2mm-5mm.
Step 7：Wear gross weight, it is different according to product length, junction is got through using upper break-through or lower break-through, product into
Type.Continue to lower hole machined, internal thread can also be processed into lower opening.The deep hole machining of piston rod is typically adopted in the prior art
It is the processing mode of drilling or hole milling, single-ended processing, and to be suitable only for hole depth smaller for the processing mode of general punching
Hole processing.The present invention is improved on the basis of original punching technology, is punched out simultaneously from two ends, using many
The mode punching of the secondary red needle for changing different tapers, and by coordinating the mould and limit assembly that are set on the outside of bar
Realize the processing in hole and the shaping of bar portion.
When carrying out rushing pulling eye using red needle, with the increase of hole depth, the cone angle in bottom hole portion and the tapered portion of red needle
Taper becomes closer to, and can reduce the efficiency of punching, therefore, in later procedure the cone angle of red pin be less than previous process on
The length of red pin is more than the length of red pin in previous process in the cone angle of red needle, later procedure；Undershoot needle in later procedure
Cone angle be less than the cone angle of undershoot needle in previous process, the length of undershoot needle is more than undershoot needle in previous process in later procedure
Length.With the increase of step, the end for the red needle changed every time is more and more sharper, i.e., cone angle is less and less, and length is with hole
It is deep gradually to increase.When red needle cone angle is less than the cone angle in bottom hole portion, in punching, red needle is easily by the material in hole by center
Squeeze to both sides, and pressure is concentrated the top for acting on tapered portion, pressure increases in the case where pressure is constant, improve
The efficiency of punching.
Further, lower opening working depth one-time-reach-place in step 5, upper hole is whole by the profound minor of holes of products, according to upper hole
Punching depth repeatedly changes red pin, and the top cone angle for the red pin changed is gradually reduced.The upper longer replacing of hole hole depth it is upper
The number of times of red needle is more to ensure the smooth of punching, and the just corresponding reduction of its top cone angle of a new red needle is changed every time, with
Ensure the processing efficiency in hole.
Further, the external diameter of the charge bar material of former material selection is generally less than the external diameter of the bar portion of piston rod finished product, therefore, step
The external diameter of bar gradually increases in rapid 2- steps 4, and bar external diameter is constant in step 5- steps 7, and with completing outer after step 4
Footpath is equal.Gradually make the external diameter of bar close to the external diameter of finished product bar portion in process, make the thickness of bar portion more uniform,
Quality is more closely knit firm.
A kind of processing tool of piston rod, the processing tool is used for the processing method of above-mentioned piston rod, especially uses
Piston rod in step 4- steps 6 is fixed, including mould, red pin, undershoot needle and the limit assembly being arranged in frame,
The mould is slidably connected in the sleeve in frame, and the limit assembly is located at the lower section of the mould, and described spacing group
Part upper end and the mould elastic connection, the limit assembly lower end are fixedly connected with the frame, and the red pin is located at institute
The top of mould is stated, the undershoot needle is located between the mould and the limit assembly, and the undershoot needle and the frame
It is fixedly connected, the mould, red pin and undershoot needle are coaxially disposed.
Red needle is in punching, provided with oil in hole, and red needle high-speed motion extrudes air, makes interior oil high-temperature gasification, pressure
Increase, easily produces and squeezes pin, be broken red needle, therefore, exhaust offered in the tapered portion in the red pin and undershoot needle
Hole.Steam vent one end open is located on taper surface, and another end opening is located on the side wall of the bar of red needle, by steam vent by gas
Change the high pressure produced to release, it is to avoid red needle fractures.
Further, in order to ensure the depth of lower opening, the limit assembly includes resilient confining element and limit base, described
Limit base lower end is fixedly connected with the frame, and the resilient confining element is arranged in limit base, and elastic spacing member
Part upper end is upwardly extended to abut with the mould lower end.
Resilient confining element uses spring, when hole in the downward punching press of red pin, because middle bar can be squeezed laterally
Pressure, so that the outer wall of bar and the inner hole wall of mould produce extruding, under the drive of frictional force, mould is with red pin one
Rise and move downward, the lower end of bar is contacted with undershoot needle, realize the processing of lower opening；Simultaneously as mold bottom connects with spring
Connect, mould moves down compression spring simultaneously, spring produces upward elastic force to mould, can play a part of buffering, with upper hole
With the increase of lower opening hole depth, mould can be moved downward gradually, and the elastic force produced on spring also gradually increases, and red pin is every
During secondary punching, the power of application be it is constant, therefore, when the downward pressure of red pin is equal with the elastic force produced on spring, mould
The two ends stress of son reaches balance, and mould will not be moved still further below, so as to ensure that the working depth of lower opening, herein, it is believed that
Mould is equal with the frictional force of bar and the gravity of bar.
Different inter processes are circulated frock and piston rod using clamping device, when the process is after machining, just
It is moved on next station and continues to process, the corresponding station of each step is changeless.
Drilling or the traditional approach production efficiency such as turnning and milling are used for 2000/day, and use the processing method of the present invention with
Processing tool, production efficiency can reach more than 20000/day (44/min), and production efficiency improves 10 times.
The beneficial effects of the invention are as follows：The processing method and its processing tool for a kind of piston rod that the present invention is provided, new work
Skill is molded successively using finish draw wire rod on multistage cold former, has overturned conventional fabrication processes, drastically reduce the area manufacture work
Sequence, efficiency improves decades of times, and intensity is high, and highly reliable, manufacturing cost is low, remarkable benefit.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of piston rod；
Fig. 2 is inventive piston bar work flow schematic diagram；
Fig. 3 is the tool structure for processing schematic diagram of piston rod；
Fig. 4 is the tool structure for processing schematic diagram of piston rod；
Fig. 5 is the structural representation of red needle；
Schematic diagram when Fig. 6 is red needle punching.
In figure：1st, piston rod, 1-1, head, 1-2, bar portion, 1-3, upper hole, 1-4, lower opening, 1-5, inner hexagonal hole, 1-6,
Afterbody chamfering, 2, mould, 3, red pin, 4, undershoot needle, 5, resilient confining element, 6, limit base, 7, sleeve, 8, steam vent,
9th, thimble, 10, frame.
Embodiment
Presently in connection with accompanying drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
The basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
As shown in figure 1, a kind of piston rod of the present invention includes the head 1-1 and bar portion 1-2 of integrally connected, the piston
Bar 1 is axially inside provided with upper hole 1-3 and lower opening 1-4, and upper the hole 1-3 and lower opening 1-4 internally prolong from upper and lower ends respectively
Stretch and connect, upper hole 1-3 is different with lower opening 1-4 aperture, and upper hole 1-3 apertures are more than lower opening 1-4 apertures.
As shown in table 1, the hole depth of piston rod 1 is more than the 10 of aperture to the specification for the finished product of piston rod 1 processed in the present embodiment
Times, belong to superdeep holes, be not suitable for processing by the way of conventional.In figure, L represents raw material total length, and Φ 0 represents raw material external diameter,
L1 represents head 1-1 height, and Φ 1 represents head 1-1 external diameter, and L2 represents inner hexagonal hole 1-5 height, and L3 represents bar portion
1-2 length, Φ 2 represents bar portion 1-2 external diameter, and L4 represents hole 1-3 depth, and Φ 3 represents upper hole 1-3 internal diameter, L5 tables
Show lower opening 1-4 depth, Φ 4 represents lower opening 1-4 internal diameter, and H represents reserved thickness, and H1 represents the length of red pin 3, H2 tables
Show the length of undershoot needle 4, α represents the cone angle of red pin 3 and undershoot needle 4, and β represents hole 1-3 and lower opening 1-4 bottom cone angle,
β 0 represents the cone angle of afterbody positioning hole, and Φ 5 represents the maximum diameter of hole of afterbody positioning hole, and H3 represents head positioning hole depth.
The specification of the finished product of 1 piston rod of table 1
As shown in Fig. 2 a kind of processing method of piston rod of the present invention, comprises the following steps,
As shown in Fig. 2 (a), step 1：Blanking, according to the product of different size from corresponding smart drum member, by smart line
The bar of length required for disk member is cut into；It is preferred to use the cut-out structure that cold headers carry to be automatically cut off.
As shown in Fig. 2 (b), step 2：In the preforming head 1-1 in bar one end；It is cold to one end of bar using cold headers
Upsetting, preliminarily forms head 1-1 shape, and now 1-1 shapes in head are in approximately up-small and down-big taper.
As shown in Fig. 2 (c), step 3：Head positioning hole is gone out on preforming head 1-1 using red pin 3, while
Bar portion 1-2 tail end processes afterbody chamfering 1-6, and using the mould with closing in, afterbody chamfering is gone out with the direct cold-heading of cold headers
Afterbody chamfering 1-6 shaping is easy in 1-6, the closing in of mould, and now head 1-1 profile is cylindrical, in cylindrical end face
Between go out the preforming positioning holes of head 1-1.
As shown in Fig. 2 (d), step 4：Continue using the red pin 3 in step 3, centered on the center in head positioning hole
Continuing punching press is molded head 1-1, and the red pin 3 formed in head 1-1 inner hexagonal hole 1-5, step 3 and step 4 uses six
Angle drift, meanwhile, length H2 is used for 30mm, and cone angle forms afterbody positioning hole for 143 ° of the punching of undershoot needle 4, and afterbody is fixed
Position hole and head positioning hole are concentric；
As shown in Fig. 2 (e), step 5：Red pin 3 is replaced by length H1 for 150mm, cone angle is 130 ° of red pin
3, red pin 3 is directed at the pulling eye that rushes that head positioning hole carries out upper hole 1-3, the alignment afterbody positioning hole of undershoot needle 4 carries out lower opening 1-
4 rush pulling eye, and two ends carry out rushing pulling eye simultaneously；Pulling eye improves production efficiency simultaneously at two ends.Due to lower opening 1- in the present embodiment
4 depth is smaller it is therefore not necessary to change undershoot needle 4, when lower opening 1-4 depth is larger, can use multiple undershoot needles 4；
As shown in Fig. 2 (f), step 6：When lower opening 1-4 depth in place after, protected in thimble 9 built in lower opening 1-4, by upper punching
Pin 3 is replaced by length H1 for 160mm, and cone angle is 120 ° of red pin 3, and continues upper hole 1-3 stretchings, stays intermediate connections
Certain thickness H is not got through；It is preferred that reserved thickness H can be 2mm-5mm, it is 3.12mm that thickness H is reserved in the present embodiment.
As shown in Fig. 2 (g), step 7：Gross weight is worn, it is different according to product length, it will be connected using upper break-through or lower break-through
Place is got through, formed product.Continue to process lower opening 1-4, internal thread can also be processed into lower opening 1-4.Used in the present embodiment
Undershoot needle 4 carries out upper break-through, now, and red pin 3 is taken out from upper hole 1-3, only retains undershoot needle 4, when getting through, makes
Mould is moved down, and undershoot needle 4 is motionless, it is to avoid undershoot needle 4 fractures.
Machined parameters in each step are as shown in table 2.
The machined parameters of table 2
As shown in fig. 6, when carrying out rushing pulling eye using red needle, with the increase of hole depth, the cone angle beta in bottom hole portion and punching
The cone angle of the tapered portion of pin becomes closer to, and can reduce the efficiency of punching, therefore, and the cone angle of red pin 3 is small in later procedure
The length of red pin 3 is more than the length of red pin 3 in previous process in the cone angle of red pin 3, later procedure in previous process
Degree；The cone angle of undershoot needle 4 is less than undershoot needle 4 in the cone angle of undershoot needle 4 in previous process, later procedure in later procedure
Length is more than the length of undershoot needle 4 in previous process.With the increase of step, the end for the red needle changed every time is more and more sharper,
I.e. cone angle is less and less.When red needle cone angle is less than the cone angle beta in bottom hole portion, in punching, red needle is easily by the material in hole
Liao You squeezes at center to both sides, and pressure is concentrated the top for acting on tapered portion, and in the case where pressure is constant, pressure increases
Greatly, the efficiency of punching is improved.
Lower opening 1-4 working depth one-time-reach-places in step 5, upper hole 1-3 is whole by the profound minor of holes of products, according to upper hole 1-3
Punching depth repeatedly change red pin 3, and the top cone angle for the red pin 3 changed is gradually reduced, and upper hole 1-3 hole depths are longer
The number of times of the red pin 3 of replacing is more to ensure the smooth of punching, and its top cone angle of one new red needle of replacing is just corresponding every time
Reduction.
The external diameter of the charge bar material of former material selection is generally less than the bar portion 1-2 of the finished product of piston rod 1 external diameter, therefore, step 2-
The external diameter of bar gradually increases in step 4, and bar external diameter is constant in step 5- steps 7, and with completing the external diameter phase after step 4
Deng.Gradually make the external diameter of bar close to finished product bar portion 1-2 external diameter in process, make bar portion 1-2 thickness more equal
Even, quality is more closely knit firm.
As shown in Figure 3-4, a kind of processing tool of piston rod, the processing tool is used for the processing of above-mentioned piston rod 1
Method, including mould 2, red pin 3, undershoot needle 4 and the limit assembly being arranged in frame 10, the mould 2 are slidably connected at
In sleeve 7 in frame 10, the limit assembly is located at the lower section of the mould 2, and the limit assembly upper end and the mould
Sub 2 elastic connections, the limit assembly lower end is fixedly connected with the frame 10, and the red pin 3 is located at the mould 2
Top, the undershoot needle 4 is located between the mould 2 and the limit assembly, and the undershoot needle 4 is consolidated with the frame 10
Fixed connection, the mould 2, red pin 3 and undershoot needle 4 are coaxially disposed.As shown in figure 5, the structure of red pin 3 and undershoot needle 4
It is essentially identical, offer steam vent 8 in the tapered portion in the red pin 3 and undershoot needle 4.Mould 2 and the active company of sleeve 7
Connect, sleeve 7 is that relative frame 10 is fixed, therefore mould 2 can be moved in sleeve 7 under pressure.
The limit assembly includes resilient confining element 5 and limit base 6, and the lower end of limit base 6 is consolidated with the frame 10
Fixed connection, the resilient confining element 5 is arranged in limit base 6, and the upper end of the resilient confining element 5 is upwardly extended and institute
State the lower end of mould 2 abutting.
Resilient confining element 5 uses spring, as hole 1-3 in the downward punching press of red pin 3, because middle bar can be to
Outside is extruded, so that the inner hole wall of the outer wall of bar and mould 2 produces extruding, under the drive of frictional force, mould 2 with
Red pin 3 is moved downwardly together, the lower end of bar is contacted with undershoot needle 4, is realized lower opening 1-4 processing；Simultaneously as mould
Sub 2 bottoms are connected with spring, and mould 2 moves down compression spring simultaneously, and spring produces upward elastic force to mould 2, can played slow
The effect of punching, with the increase of upper hole 1-3 and lower opening 1-4 hole depths, mould 2 can be moved downward gradually, the bullet produced on spring
Power also gradually increases, and during 3 each punching of red pin, the power of application be it is constant, therefore, when the downward pressure of red pin 3 with
When the elastic force produced on spring is equal, the two ends stress of mould 2 reaches balance, and mould 2 will not be moved still further below, so as to ensure
Lower opening 1-4 working depth, herein, it is believed that mould 2 is equal with the frictional force of bar and the gravity of bar.
The resilient confining element 5 in limit assembly is changed to fix limit element after lower opening 1-4 is processed in place, it is fixed
Limit element using being arranged on thimble 9 in lower opening 1-4, can withstand on bar portion 1-2 lower surface and mould 2 using thimble 9
On lower surface, it is to avoid mould 2 continues to move down, so as to ensure that lower opening 1-4 size does not continue to change.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, pass through above-mentioned description, related staff
Various changes and amendments can be carried out in without departing from the scope of the present invention completely.The technical scope of this invention is not
It is confined to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (7)
1. a kind of processing method of piston rod, it is characterised in that：The head (1-1) of the piston rod (1) including integrally connected and
Bar portion (1-2), the piston rod (1) is axially inside provided with upper hole (1-3) and lower opening (1-4), the upper hole (1-3) and lower opening
(1-4) is extended inward and connected from upper and lower ends respectively, and the processing method comprises the following steps,
Step 1：Blanking, according to the product of different size from corresponding smart drum member, required length is cut into by smart drum member
The bar of degree；
Step 2：On the preforming head in bar one end (1-1)；
Step 3：Head positioning hole is gone out on preforming head (1-1) using red pin (3), while in bar portion (1-2) tail
End processes afterbody chamfering (1-6)；
Step 4：Continuation, which uses the red pin (3) in step 3 to continue punching press centered on the center in head positioning hole, makes head (1-
1) it is molded, meanwhile, afterbody positioning hole is formed using undershoot needle (4) punching, and afterbody positioning hole and head positioning hole are concentric；
Step 5：Hole (1-3's) rushes drawing in replacing red pin (3) and undershoot needle (4), red pin (3) alignment head positioning hole progress
Hole, undershoot needle (4) alignment afterbody positioning hole carries out the pulling eye that rushes of lower opening (1-4), and two ends carry out rushing pulling eye simultaneously；
Step 6：When lower opening (1-4) depth in place after, protected in thimble (9) built in lower opening (1-4), change red pin (3) and after
Continuous upper hole (1-3) stretching, makes intermediate connections stay certain thickness H not get through；
Step 7：Gross weight is worn, it is different according to product length, junction is got through using upper break-through or lower break-through, formed product.
2. the processing method of piston rod as claimed in claim 1, it is characterised in that：The cone angle of red pin (3) in later procedure
Less than the cone angle of red pin (3) in previous process, the length of red pin (3) is more than red pin in previous process in later procedure
(3) length；Under the cone angle of undershoot needle (4) is less than in the cone angle of undershoot needle (4) in previous process, later procedure in later procedure
The length of red needle (4) is more than the length of undershoot needle (4) in previous process.
3. the processing method of piston rod as claimed in claim 1 or 2, it is characterised in that：Lower opening (1-4) processing is deep in step 5
One-time-reach-place is spent, upper hole (1-3) is whole by the profound minor of holes of products, and red pin is repeatedly changed according to the punching depth of upper hole (1-3)
, and the top cone angle of red pin (3) changed is gradually reduced (3).
4. the processing method of piston rod as claimed in claim 1, it is characterised in that：In step 2- steps 4 external diameter of bar by
Cumulative big, bar external diameter is constant in step 5- steps 7, and equal with completing the external diameter after step 4.
5. a kind of processing tool of piston rod, it is characterised in that：The processing tool is used for described in claim any one of 1-4
The processing method of piston rod (1), including mould (2), red pin (3), undershoot needle (4) and spacing group being arranged in frame (10)
Part, the mould (2) is slidably connected at the sleeve (7) in frame (10) Nei, and the limit assembly is located under the mould (2)
Side, and the limit assembly upper end and the mould (2) elastic connection, the limit assembly lower end are fixed with the frame (10)
Connection, the red pin (3) is located at the top of the mould (2), and the undershoot needle (4) is located at the mould (2) and the limit
Between hyte part, and the undershoot needle (4) is fixedly connected with the frame (10), the mould (2), red pin (3) and undershoot
Pin (4) is coaxially disposed.
6. the processing tool of piston rod as claimed in claim 5, it is characterised in that：On the red pin (3) and undershoot needle (4)
Tapered portion on offer steam vent (8).
7. the processing tool of piston rod as claimed in claim 5, it is characterised in that：The limit assembly includes elastic spacing member
Part (5) and limit base (6), limit base (6) lower end are fixedly connected with the frame (10), the resilient confining element (5)
It is arranged in limit base (6), and the resilient confining element (5) upper end upwardly extends and abutted with the mould (2) lower end.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188326A (en) * | 2018-03-20 | 2018-06-22 | 鹏驰五金制品（昆山）有限公司 | Engine piston bar cold upsetting forming die |
| CN108213879A (en) * | 2018-03-20 | 2018-06-29 | 鹏驰五金制品（昆山）有限公司 | Engine piston bar cold-heading molding technique |
| CN112077246A (en) * | 2020-08-19 | 2020-12-15 | 常州市武进区洛阳新拓五金加工厂 | Cold heading forming process for piston rod in vibration damper of motorcycle and electric vehicle |
| CN114367795A (en) * | 2021-12-29 | 2022-04-19 | 湖南中航紧固系统有限公司 | Machining method of automobile gear shifting hydraulic piston rod |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188326A (en) * | 2018-03-20 | 2018-06-22 | 鹏驰五金制品（昆山）有限公司 | Engine piston bar cold upsetting forming die |
| CN108213879A (en) * | 2018-03-20 | 2018-06-29 | 鹏驰五金制品（昆山）有限公司 | Engine piston bar cold-heading molding technique |
| CN112077246A (en) * | 2020-08-19 | 2020-12-15 | 常州市武进区洛阳新拓五金加工厂 | Cold heading forming process for piston rod in vibration damper of motorcycle and electric vehicle |
| CN112077246B (en) * | 2020-08-19 | 2024-04-02 | 常州市武进区洛阳新拓五金加工厂 | Cold heading forming process for piston rod in vibration damper of motorcycle and electric vehicle |
| CN114367795A (en) * | 2021-12-29 | 2022-04-19 | 湖南中航紧固系统有限公司 | Machining method of automobile gear shifting hydraulic piston rod |
| CN114367795B (en) * | 2021-12-29 | 2023-05-19 | 湖南中航紧固系统有限公司 | Machining method of automobile gear shifting hydraulic piston rod |
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