CN114393173A - Method for manufacturing chain - Google Patents
Method for manufacturing chain Download PDFInfo
- Publication number
- CN114393173A CN114393173A CN202210009438.0A CN202210009438A CN114393173A CN 114393173 A CN114393173 A CN 114393173A CN 202210009438 A CN202210009438 A CN 202210009438A CN 114393173 A CN114393173 A CN 114393173A
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- plate
- punching
- chain
- damping
- holes
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000004080 punching Methods 0.000 claims abstract description 94
- 239000003921 oil Substances 0.000 claims description 94
- 238000013016 damping Methods 0.000 claims description 72
- 238000003860 storage Methods 0.000 claims description 32
- 239000010720 hydraulic oil Substances 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 17
- 238000007599 discharging Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21L—MAKING METAL CHAINS
- B21L9/00—Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains
- B21L9/02—Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains of roller-chain or other plate-link type
- B21L9/04—Punching or bending the different parts of the chain links
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- 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
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/06—Making more than one part out of the same blank; Scrapless working
-
- 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
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- 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
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention discloses a method for manufacturing a chain, which comprises the following steps: a. processing to form a rectangular plate for punching the chain plate; b. punching a first row of 8-shaped n chain plates on a plate by using a punching die on punching equipment, then conveying the plate forward by using a conveying device for a set line spacing a, punching a second row of n chain plates on the plate, and so on until m rows of chain plates are punched on the plate, thereby leaving m multiplied by n punching holes in a rectangular array on the plate, wherein the punching holes comprise semicircular holes with two ends corresponding to end semicircles, middle sections corresponding to concave arcs and reference directions corresponding to the length directions of the chain plates, the punching holes are inclined in a counterclockwise rotating manner by taking the circle center of the semicircular hole on the left side as a rotating center, the reference directions form a rotating angle alpha with the horizontal direction, and alpha is more than or equal to 25 degrees and less than or equal to 35 degrees. The chain plate punching device can improve the material utilization rate of the chain plate during punching on the premise of not influencing the punching quality of the chain plate, and further reduce the processing cost of a chain.
Description
Technical Field
The invention relates to the technical field of chain manufacturing, in particular to a manufacturing method of a chain.
Background
The chain transmission is a common transmission mode and is characterized by being suitable for remote power transmission and having accurate transmission ratio. The basic construction of a chain drive includes a drive sprocket, a driven sprocket, and a chain trained about the drive sprocket and the driven sprocket, wherein the chain is the body member of the chain drive. The chain usually includes a plurality of inner links, is used for connecting the outer chain link of adjacent inner link, and the inner link includes about two inner link boards, and the inner link board includes the semicircle at both ends, connects at the both ends semicircle correspond the indent circular arc between one side, with the endocentric connect the via hole of both ends semicircle to make the inner link board be 8 fonts, be equipped with the bush about between two inner link boards, the both ends of bush interference fit is respectively in the connect the via hole of corresponding one side inner link board, the cover is equipped with rotatable roller on the bush. The outer chain link comprises a left outer chain link and a right outer chain link which are the same as the inner chain links in shape, a pin shaft is arranged between the left outer chain link and the right outer chain link and penetrates through the bushings corresponding to the two adjacent inner chain links, and two ends of the pin shaft are respectively connected to the outer sides of the connecting through holes of the outer chain links on the corresponding side in a press riveting mode, so that the adjacent inner chain links can rotate relatively. For convenience of description, the outer link plate and the inner link plate are hereinafter collectively referred to as a link plate.
The chain plate of the existing chain is usually manufactured by adopting a sheet metal stamping forming process, and has high working efficiency and good consistency of shape and size. However, the existing link plate processing and manufacturing still has the following technical defects: as shown in the attached fig. 1, when the link plates 1 are punched out from the strip-shaped metal plate 2 by the punching die on the punching machine, the link plates are arranged in a rectangular array on the strip-shaped metal plate, and a certain arrangement margin needs to be provided between adjacent link plates to ensure the punching quality of the link plates. The chain plate comprises end part semicircles 11 at two ends, an inwards concave arc 12 connected between the end part semicircles at the two ends and a connecting through hole 13 concentric with the end part semicircles at the two ends, so that the appearance of the chain plate is 8-shaped. That is to say, the long limit of link joint is the non-straight line, but the pitch arc of indent, consequently, can leave the waste material that is fusiformis between the adjacent link joint, and then influences the utilization ratio of material, is unfavorable for reducing the manufacturing cost of chain. It will be appreciated that if we simply reduce the above-mentioned layout margin, the utilization rate of the plate material can be improved, but the punching quality of the link plate is reduced accordingly.
Disclosure of Invention
The invention aims to provide a chain manufacturing method, which can improve the material utilization rate of chain plate punching without influencing the chain plate punching quality, and further reduce the processing cost of the chain.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing method of a chain is particularly suitable for punching and cutting m multiplied by n 8-shaped chain plates on a plate, each chain plate comprises end part semicircles at two ends, an inwards concave circular arc connected between the end part semicircles at the two ends and a connecting through hole concentric with the two end semicircles, the connecting line direction between the circle centers of the end part semicircles at the two ends is the length direction of the chain plate, and the chain plate is processed by the following steps:
a. processing to form a rectangular plate for punching the chain plate;
b. the method comprises the steps of punching a first row of 8-shaped chain plates on a plate by using a punching die on punching equipment, then conveying the plate forward by using a conveying device for a set line spacing a, punching a second row of n chain plates on the plate, and so on until m rows of chain plates are punched on the plate, thereby leaving m multiplied by n punching holes in a rectangular array on the plate, wherein the punching holes comprise semicircular holes with two ends corresponding to end semicircles, middle sections corresponding to concave arcs and reference directions corresponding to the length directions of the chain plates, the punching holes rotate and incline anticlockwise by taking the circle center of the semicircular hole on the left side as a rotation center, the reference directions and the horizontal direction form a rotation angle alpha, and alpha is more than or equal to 25 degrees and less than or equal to 35 degrees.
As mentioned above, the link plates are usually arranged in a rectangular array on a rectangular plate for punching, that is, a connecting line between two connecting through holes of the link plates is transversely arranged in the length direction, so that the remaining punching allowance between two adjacent rows of punching holes is too large, which causes material waste, especially for link plates with large size.
The chain plate is arranged on the rectangular plate in an inclined mode, so that the punching hole rotates anticlockwise by a rotation angle alpha of 25-35 degrees by taking the circle center of the semicircular hole on the left side as a rotation center. Like this, the tip semicircle on left side and indent circular arc just arrange with approximately equidistant interval with the tip semicircle part on indent circular arc and right side in the next row of link joint in the link joint to avoid leaving the waste material that is fusiformis between adjacent die-cut hole, be favorable to furthest utilizing rectangle panel, reduce the consumption of material.
When alpha is less than 25 degrees or alpha is more than 35 degrees, the connecting through holes of the two rows of chain plates are close to each other, the connecting through holes on the left side in the chain plates are not beneficial to being close to the concave arc parts in the next row of chain plates, and the utilization rate of the plates is difficult to obviously improve at the moment.
It should be noted that the conveying device for conveying the sheet material on the punching device belongs to the prior art, and will not be described in detail herein.
Preferably, the radius of the semicircular holes at the two ends of the punching hole is equal to the radius of the middle section.
Therefore, the connecting through holes on the left side and the concave circular arcs in the chain plates can be completely arranged at equal intervals with the connecting through holes on the right side and the concave circular arcs in the next row of chain plates, and the utilization rate of the plates is improved to the maximum extent on the premise of ensuring the punching quality.
Preferably, in the step b, two positioning holes matched with the first punching hole and the nth punching hole are simultaneously formed at the foremost end of the plate by using a punching device, the punching device comprises a positioning pin which can be positioned in the positioning holes in a lifting manner, when the conveying device enables the plate to move forwards until the positioning pin is positioned in the corresponding positioning hole, the plate at the moment is conveyed forwards by a set line spacing a, and then the first row of chain plates are punched on the plate; and the conveying device enables the plate to continuously move forwards until the positioning pin is positioned in the subsequent corresponding punching hole, the plate is conveyed forwards by the line spacing a at the moment, and then the second row of chain plates are punched on the plate.
The invention firstly punches two positioning holes matched with the first punching hole and the nth punching hole at the foremost end of the plate, so that the plate can be positioned by matching the positioning pins with the positioning holes, and then the conveying device moves the plate forward one line spacing each time, so that the positioning pins on the punching equipment can be accurately positioned in the punching holes. That is, the subsequent punching hole can function as a positioning hole in the punching process, thereby facilitating the simplification of the positioning structure.
Preferably, the stamping equipment is provided with an upper die, a lower die and a damping oil cylinder vertically arranged on the lower die, a connecting plate is arranged on an upward piston rod of the damping oil cylinder, the positioning pin is arranged on the connecting plate, a working cavity at the lower part of the damping oil cylinder is communicated with an oil storage cavity through a damping pipeline, a reset pressure spring abutting against the piston is arranged in the working cavity of the damping oil cylinder, when the upper die moves downwards and two positioning holes are punched on a plate, the upper die moves the positioning pin and the connecting plate downwards, and at the moment, hydraulic oil in the working cavity of the damping oil cylinder enters the oil storage cavity through the damping pipeline; when the upper die moves upwards to reset, the reset pressure spring drives the piston of the damping oil cylinder to move upwards, and then the hydraulic oil in the oil storage cavity is pumped back into the working cavity of the damping oil cylinder.
When the upper die moves downwards and the chain plate is punched on the plate to form a punching hole, the upper die simultaneously moves the positioning pin, the connecting plate and the piston rod of the damping oil cylinder downwards, and at the moment, hydraulic oil in a working cavity at the lower part of the damping oil cylinder flows back to the oil storage cavity through the damping pipeline; when the upper die moves upwards to reset, the reset pressure spring drives the piston of the damping oil cylinder to move upwards, and then the hydraulic oil in the oil storage cavity is pumped back into the working cavity of the damping oil cylinder, so that the continuous use of the damping oil cylinder is realized.
Preferably, the working cavity at the lower part of the damping oil cylinder is communicated with an oil storage cavity through an oil passage, a one-way valve is arranged on the oil passage, when an upper die moves downwards and two positioning holes are punched on a plate, the positioning pins and the connecting plate move downwards by the upper die, the oil passage is in a conducting state from the working cavity of the damping oil cylinder to the oil storage cavity by the one-way valve, and hydraulic oil in the working cavity of the damping oil cylinder quickly enters the oil storage cavity through the damping pipeline and the oil passage simultaneously; when the upper die moves upwards to reset, the one-way valve enables the oil passage to be in a stop state from the oil storage cavity to the working cavity of the damping oil cylinder, the reset pressure spring drives the piston of the damping oil cylinder to move upwards to enable the working cavity to be in a negative pressure state, and hydraulic oil in the oil storage cavity is slowly pumped back into the working cavity of the damping oil cylinder through the damping pipeline.
The invention realizes double-pipeline connection between the working chamber and the oil storage chamber of the damping oil cylinder. When the upper die moves downwards to punch out the chain plate, the check valve enables the oil through pipeline to be communicated, and therefore hydraulic oil in the working cavity of the damping oil cylinder can quickly enter the oil storage cavity through the damping pipeline and the oil through pipeline. That is, the upper die can move down rapidly to realize punching. When the upper die moves upwards and resets, the one-way valve stops the oil through pipe, and at the moment, the hydraulic oil in the oil storage cavity can only slowly return to the working cavity of the damping oil cylinder through the damping pipe. That is to say, the locating pin that sets up on the connecting plate can only slowly move up, can ensure that conveyor carries panel earlier to avoid the locating pin to form the hindrance to the panel that moves forward. The positioning pin can only move up slowly under the plate and slightly jack up the plate until the plate enters the positioning hole for positioning.
Therefore, the invention has the following beneficial effects: under the prerequisite that does not influence the die-cut quality of link joint, material utilization when can promoting the die-cut of link joint, then reduce the processing cost of chain.
Drawings
Fig. 1 is a schematic view of an arrangement structure of a chain plate on a plate material in the prior art.
Fig. 2 is a schematic view of an arrangement structure of the link plate on the plate material in the invention.
Figure 3 is a schematic view of a die-cut sheet structure.
Fig. 4 is a partial structural view of the upper and lower dies.
Fig. 5 is a schematic view of an arrangement of pilot holes and punched holes in a sheet material.
Fig. 6 is a schematic view of a connection structure of the damping cylinder and the oil reservoir.
In the figure: 1. the device comprises a chain plate 11, an end semicircle 12, an inward concave arc 13, a connecting through hole 2, a plate 21, a punching hole 211, a semicircular hole 212, a middle section 22, a positioning hole 3, an upper die 31, a main punch 32, a secondary punch 4, a lower die 41, a main punch 5, a discharging block 51, a secondary punch 6, a damping oil cylinder 61, a damping pipeline 62, a reset pressure spring 63, an oil through pipeline 64, a one-way valve 7, a connecting plate 8, a positioning pin 9 and an oil storage cavity.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
As shown in fig. 2 and 3, a method for manufacturing a chain is suitable for die-cutting m rows × n columns of 8-shaped link plates 1 on a plate 2, wherein the link plates include two end semi-circles 11, an inward concave arc 12 connected between the two end semi-circles, and connecting through holes 13 concentric with the two end semi-circles, and for convenience of description, a connecting line direction between centers of the two end semi-circles is referred to as a length direction of the link plate, and specifically, the link plate processing includes the following steps:
a. the rectangular plate 2 for punching the link plate is formed by machining. Of course, the sheet material may be made into a coil;
b. the method comprises the steps of punching a first row of 8-shaped n chain plates at the front end of a plate by using a punching die on a punching device, then conveying the plate forwards by using a conveying device for a set row spacing a, punching a second row of n chain plates on the plate, and so on until m rows of chain plates are punched on the plate, thereby leaving m x n punching holes 21 in a rectangular array on the plate. Of course, the punching hole should include a semicircular hole 211 whose two ends correspond to the end semicircles of the link plate, and a middle section 212 corresponding to the concave arc. In addition, the reference direction of the punching holes is defined by the length direction of the chain plate, and the arrangement of the punching holes on the plate is as follows: the punching hole rotates and inclines anticlockwise by taking the circle center of the left semicircular hole as a rotation center until a rotation angle alpha is formed between the reference direction and the horizontal direction, and the alpha is more than or equal to 25 degrees and less than or equal to 35 degrees.
As mentioned above, the link plates are usually arranged transversely in the length direction and form a rectangular array on the plate, so that the remaining punching allowance between the two adjacent rows of punching holes is too large, which results in material waste, especially for link plates with large dimensions.
The chain plate is arranged on the rectangular plate in an inclined mode, so that the punching hole rotates anticlockwise by a rotation angle alpha of 25-35 degrees by taking the circle center of the semicircular hole on the left side as a rotation center. Like this, left connecting hole and indent circular arc just in the link joint with next row link joint in indent circular arc and the connecting hole part interval arrangement on right side can leave the waste material that roughly is the fillet shape between adjacent die-cutting hole, avoid leaving the waste material that is the fusiformis between adjacent die-cutting hole, are favorable to promoting the utilization ratio of rectangle panel, reduce the consumption of material.
It is understood that the stamping device, the conveying device for conveying the sheet material on the stamping device, and the like in the present invention belong to the prior art in both structure and operation principle, and the present embodiment will not be described in detail.
Preferably, the semicircular radii of the end parts at the two ends of the chain plate are the same as the radius of the concave circular arc in the middle, so that the semicircular hole radii of the two ends of the punching hole are equal to the radius of the middle section. Therefore, the connecting through holes on the left side and the concave circular arcs in the chain plates can be completely arranged at equal intervals with the connecting through holes on the right side and the concave circular arcs in the next row of chain plates, narrow strip-shaped waste materials with equal width are left between adjacent punching holes, and the utilization rate of the plates can be improved to the maximum extent.
The punching die for punching the chain plate (forming the punching hole) on the plate can comprise an upper die 3 and a lower die 4, wherein the lower die comprises at least one row of 8-shaped main punching holes 41 matched with the appearance of the chain plate, a liftable unloading block 5 is arranged in each main punching hole, and cylindrical secondary punches 51 matched with connecting through holes are arranged at two ends of each unloading block. The upper die comprises a main punch 31 matched with the 8-shaped main punch and a secondary punch 32 arranged on the main punch and matched with the secondary punch.
When the chain plate needs punching, a plate is placed on the lower die firstly, then the upper die moves downwards, the main punch of the upper die and the main punch of the lower die form shearing, the appearance of the chain plate is punched, the discharging plate in the main punch moves downwards under the extrusion of the main punch, meanwhile, the secondary punch in the discharging block of the lower die is matched with the secondary punch on the main punch of the upper die, a connecting through hole is punched in the appearance of the chain plate, and the punched chain plate is located in the main punch. When the upper die moves upwards and resets, the discharging block rises, so that the chain plate is determined as a main punching hole, and then the punched chain plate can be taken away manually or automatically.
It should be noted that the maximum downward moving depth of the discharging plate is adapted to the depth of the main punch of the upper die extending into the main punching hole, and the lower part of the discharging block can be provided with a reset pressure spring and a corresponding limit structure, so that the discharging block can automatically move upwards to a position not higher than the upper surface of the lower die.
As a preferable mode, in step b, as shown in fig. 5, two positioning holes 22 matching with the first and nth punched holes are formed at the foremost end of the plate material at the same time by using a punching device (including the punching die), that is, a row of punched holes for positioning is punched at the foremost end of the plate material, wherein the first and nth punched holes constitute the positioning holes. The stamping equipment also comprises a lifting positioning pin, after the positioning hole is punched, the plate is moved forward by a line spacing by the conveying device, the positioning pin is lifted and positioned in the corresponding positioning hole, and then a first row of useful chain plates can be punched on the plate; and then the conveying device enables the plate to continuously move forwards until the positioning pins are positioned in the subsequent corresponding punching holes, and then the second row of chain plates are punched in the plate. By parity of reasoning, the chain plates can be continuously punched on the plate, and the same row spacing a is kept between the front row of adjacent punching holes and the rear row of adjacent punching holes.
That is, the shape of the positioning pin can be matched with the shape of the punching hole, or the shape of the left positioning pin is a cylindrical pin matched with the left semicircular hole in the first row of punching holes, and the shape of the right positioning pin is a cylindrical pin matched with the right semicircular hole in the nth row of punching holes.
Further, as shown in fig. 6, a vertical damping cylinder 6 can be further arranged on the lower die, a connecting plate 7 is arranged on an upward piston rod of the damping cylinder, a left positioning pin and a right positioning pin 8 are arranged on the connecting plate, a working cavity at the lower part of the damping cylinder is communicated with an oil storage cavity 9 through a damping pipeline 61, and a reset pressure spring 62 for abutting against a piston is arranged in the working cavity of the damping cylinder. When the upper die moves downwards and punches a positioning hole (or a punching hole) in the plate, the upper die moves the positioning pin together with the connecting plate downwards, and at the moment, hydraulic oil in the working cavity of the damping oil cylinder enters the oil storage cavity through the damping pipeline; when the upper die moves upwards and resets, the reset pressure spring drives the piston of the damping oil cylinder to move upwards, negative pressure is formed in the working cavity at the moment, and then hydraulic oil in the oil storage cavity is pumped back into the working cavity of the damping oil cylinder.
When the upper die moves downwards and the subsequent chain plate is punched on the plate, the upper die moves the positioning pin, the connecting plate and the piston rod of the damping oil cylinder downwards again, and at the moment, hydraulic oil in the working cavity at the lower part of the damping oil cylinder flows back to the oil storage cavity through the damping pipeline; when the upper die moves upwards to reset, the reset pressure spring drives the piston of the damping oil cylinder to move upwards, and then the hydraulic oil in the oil storage cavity is pumped back into the working cavity of the damping oil cylinder, so that the continuous use of the damping oil cylinder is realized.
Furthermore, the working chamber at the lower part of the damping oil cylinder is communicated with the oil storage chamber by an oil pipeline 63, and a check valve 64 is arranged on the oil pipeline.
When the upper die moves downwards and punching positioning holes (or punching holes) on the plate, the upper die enables the positioning pins and the connecting plate to move downwards, the one-way valve enables the oil passage to be in a conduction state from the working cavity of the damping oil cylinder to the oil storage cavity, and at the moment, hydraulic oil in the working cavity of the damping oil cylinder quickly enters the oil storage cavity through the damping pipeline and the oil passage simultaneously, so that the positioning pins and the connecting plate quickly move downwards along with the upper die; when the upper die moves upwards to reset, the one-way valve enables the oil passage to be in a stop state from the oil storage cavity to the working cavity of the damping oil cylinder, at the moment, the reset pressure spring drives the piston of the damping oil cylinder to move upwards to enable the working cavity to be in a negative pressure state, and hydraulic oil in the oil storage cavity is slowly pumped back into the working cavity of the damping oil cylinder through the damping pipeline.
It can be understood that the pipe diameter of the oil communicating pipeline can be properly increased, the pipe diameter of the damping pipeline is reduced, the positioning pin is enabled to slowly rise on the premise that the positioning pin is enabled to move downwards quickly, the conveying device can convey the plate forward in advance before the positioning pin rises to expose the upper surface of the lower die, and therefore the positioning pin is prevented from blocking the plate moving forward. The positioning pin can only move up slowly under the plate and slightly jack up the plate until the plate enters the positioning hole for positioning.
Claims (5)
1. A manufacturing method of a chain is particularly suitable for punching and cutting m multiplied by n 8-shaped chain plates on a plate, each chain plate comprises end part semicircles at two ends, an inwards concave circular arc connected between the end part semicircles at the two ends and a connecting through hole concentric with the two end semicircles, and the connecting line direction between the circle centers of the end part semicircles at the two ends is the length direction of the chain plate, and is characterized in that the chain plate is processed by the following steps:
a. processing to form a rectangular plate for punching the chain plate;
b. the method comprises the steps of punching a first row of 8-shaped chain plates on a plate by using a punching die on punching equipment, then conveying the plate forward by using a conveying device for a set line spacing a, punching a second row of n chain plates on the plate, and so on until m rows of chain plates are punched on the plate, thereby leaving m multiplied by n punching holes in a rectangular array on the plate, wherein the punching holes comprise semicircular holes with two ends corresponding to end semicircles, middle sections corresponding to concave arcs and reference directions corresponding to the length directions of the chain plates, the punching holes rotate and incline anticlockwise by taking the circle center of the semicircular hole on the left side as a rotation center, the reference directions and the horizontal direction form a rotation angle alpha, and alpha is more than or equal to 25 degrees and less than or equal to 35 degrees.
2. The method of claim 1, wherein the radius of the semicircular holes at both ends of the punched hole is equal to the radius of the middle section.
3. The method according to claim 1, wherein in step b, two positioning holes matching with the first and nth punching holes are simultaneously formed at the foremost end of the plate by using a punching device, the punching device comprises a positioning pin which can be lifted and positioned in the positioning hole, when the conveying device moves the plate forward until the positioning pin is positioned in the corresponding positioning hole, the plate is conveyed forward by a set row spacing a, and then the first row of chain plates are punched on the plate; and the conveying device enables the plate to continuously move forwards until the positioning pin is positioned in the subsequent corresponding punching hole, the plate is conveyed forwards by the line spacing a at the moment, and then the second row of chain plates are punched on the plate.
4. The method according to claim 3, wherein the stamping device is provided with an upper die, a lower die, and a damping cylinder vertically arranged on the lower die, wherein an upward piston rod of the damping cylinder is provided with a connecting plate, the positioning pin is arranged on the connecting plate, a working chamber at the lower part of the damping cylinder is communicated with an oil storage chamber through a damping pipeline, a reset pressure spring for abutting against the piston is arranged in the working chamber of the damping cylinder, when the upper die moves downwards and punches two positioning holes on the plate, the upper die moves the positioning pin together with the connecting plate downwards, and at the moment, hydraulic oil in the working chamber of the damping cylinder enters the oil storage chamber through the damping pipeline; when the upper die moves upwards to reset, the reset pressure spring drives the piston of the damping oil cylinder to move upwards, and then the hydraulic oil in the oil storage cavity is pumped back into the working cavity of the damping oil cylinder.
5. The method for manufacturing a chain according to claim 4, wherein the working chamber at the lower part of the damping cylinder is communicated with an oil storage chamber through an oil passage, a one-way valve is arranged on the oil passage, when the upper die moves downwards and two positioning holes are punched on the plate, the upper die moves the positioning pin and the connecting plate downwards, the one-way valve enables the oil passage to be in a conducting state from the working chamber of the damping cylinder to the oil storage chamber, and hydraulic oil in the working chamber of the damping cylinder rapidly enters the oil storage chamber through the damping pipeline and the oil passage simultaneously; when the upper die moves upwards to reset, the one-way valve enables the oil passage to be in a stop state from the oil storage cavity to the working cavity of the damping oil cylinder, the reset pressure spring drives the piston of the damping oil cylinder to move upwards to enable the working cavity to be in a negative pressure state, and hydraulic oil in the oil storage cavity is slowly pumped back into the working cavity of the damping oil cylinder through the damping pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210009438.0A CN114393173B (en) | 2022-01-06 | 2022-01-06 | Manufacturing method of chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210009438.0A CN114393173B (en) | 2022-01-06 | 2022-01-06 | Manufacturing method of chain |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114393173A true CN114393173A (en) | 2022-04-26 |
| CN114393173B CN114393173B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210009438.0A Active CN114393173B (en) | 2022-01-06 | 2022-01-06 | Manufacturing method of chain |
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|---|---|
| CN (1) | CN114393173B (en) |
Citations (9)
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| CN109079088A (en) * | 2018-09-25 | 2018-12-25 | 浙江象牌链传动有限公司 | It is a kind of equipped with the chain assembly equipment for preventing from pushing positioning simultaneously |
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| CN114393173B (en) | 2024-04-02 |
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