CN214684123U - Compact chain precision forming die - Google Patents
Compact chain precision forming die Download PDFInfo
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- CN214684123U CN214684123U CN202022435752.4U CN202022435752U CN214684123U CN 214684123 U CN214684123 U CN 214684123U CN 202022435752 U CN202022435752 U CN 202022435752U CN 214684123 U CN214684123 U CN 214684123U
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Abstract
The utility model relates to a compact chain precision forming mould for the precision forming of chain ring, its characterized in that: the chain ring upper die and the chain ring lower die respectively comprise die bodies with the same structures and a pair of ring crown dies arranged at two end parts of a die body joint surface, and an upper die core and a lower die core are integrally formed in the centers of the die body joint surfaces of the chain ring upper die and the chain ring lower die respectively. The utility model has the advantages that: the upper and lower dies of the chain ring adopt an internal and external positioning structure to ensure that the local matching precision is reduced under the stress state after die assembly, and the lower die of the chain ring is matched with a detachable ring crown die through a die core to realize the forming of the chain ring with high-precision core size; and the ring crown mould is installed through the inlaying groove of special structure to the mould body, avoids the too big mould damage that causes of horizontal direction atress, satisfies big specification chain ring shaping operating mode.
Description
Technical Field
The utility model relates to a mould, in particular to compact chain founds ring precision forming die.
Background
The chain is widely applied to the fields of coal mining, hoisting, coal power generation, ships, ocean engineering drilling platforms and the like, the performance of the chain is different according to different industries and environments, and overall comprehensive indexes of the chain comprise strength, precision, hardness and corrosion resistance, wherein the strength index also comprises yield strength, tensile strength, fatigue strength, bending strength, elongation and the like.
At present, two types of chain manufacturing equipment are mainly used in China, one type of equipment is special equipment (an automatic chain knitting machine and an automatic welding machine) which is produced by German MRP company and is used for producing mining chains with the diameter of 22mm-48mm, continuous production among stations cannot be realized by the equipment, and the efficiency is relatively low. However, the equipment has high precision and is suitable for producing chains with transmission function, and the equipment can not be accepted by ship chain and mooring chain production enterprises because the diameter of the produced chains is limited and chain stoppers cannot be produced. The other is a continuous rotary automatic chain making machine set produced by Issa, Sweden, which is not limited by the diameter of the production chain and is suitable for the production of chain links with gear, but the precision of the device is not high and is not suitable for chains with transmission functions, such as mining chains, hoisting chains and slag removing chains.
Along with the development demand of science and technology, the requirement on chains in each field is higher and higher, and it is imperative to develop a production device which can simultaneously produce chains with high strength, high precision and large specification.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can produce the accurate forming die of vertical ring of high strength, high accuracy chain and long service life's compact chain.
In order to solve the technical problem, the utility model adopts the technical scheme that: the utility model provides a chain ring precision forming mould for the precision forming of chain ring, its innovation point lies in: comprises a chain ring upper die and a chain ring lower die,
the chain ring upper die and the chain ring lower die respectively comprise die bodies with the same structure and a pair of ring crown dies arranged at two end parts of a die assembly surface of the die bodies,
an upper mold core is integrally formed in the center of a mold body matching surface of the chain ring upper mold, the upper mold core is formed into a closed waist-shaped block body which is positioned on a horizontal plane by connecting two parallel straight line sections with arc sections at two ends, and a positioning bulge extending downwards is arranged in the center of the waist-shaped block body and is of a conical column structure which is gradually reduced from top to bottom;
the mold comprises a mold body, a mold core and a mold core, wherein the mold core is integrally formed in the center of a mold body joint surface of the chain ring lower mold, the lower mold core is a waist-shaped hole-shaped ring body which is formed by connecting two parallel straight line sections and two ends of the arc sections to form a closed horizontal plane, the outer ring side wall of the waist-shaped hole-shaped ring body is provided with a groove, the cross section of the groove is arc and extends along the circumferential direction of the groove, the arc-shaped groove is used for embedding the inner ring side wall of the chain ring, and the inner ring of the waist-shaped hole-shaped ring body is a conical hole structure which can be matched with the conical column structure;
the limiting ring crown mold is characterized in that one end, close to the center of the mold body, of the limiting ring crown mold is the front end, one end, far away from the center of the mold body, of the limiting ring crown mold is the rear end, an arc-shaped concave surface used for embedding the ring crown at the end part of the chain ring is arranged at the front end of the ring crown mold, and the ring crown mold is fixed at the two end parts of the mold matching surface of the mold body through bolts.
Preferably, the annular crown mold is of a wedge-shaped block structure, the bottom surface of the annular crown mold at least has a horizontal supporting surface and an inclined supporting surface, the inclined supporting surface is gradually inclined upwards from the front end to the rear end of the annular crown mold, and the annular crown mold is provided with at least one pair of through holes penetrating from the upper surface to the horizontal supporting surface;
the mold comprises a mold body, a positioning ring crown mold, an embedding groove, a supporting ring, a positioning ring crown mold and a positioning ring crown mold, wherein the two ends of a mold clamping surface of the mold body are respectively provided with the embedding groove for mounting the positioning ring crown mold, the side wall of one side, close to the center of the mold body, of the embedding groove is a vertical side wall, the side wall, far away from the center of the mold body, of the embedding groove is an inclined side wall with the same slope as that of an inclined supporting surface, the bottom of the embedding groove is a horizontal groove bottom matched with the horizontal supporting surface, and a threaded hole corresponding to a through hole is drilled in the bottom of the horizontal groove;
the ring crown die is fixed in the embedding groove of the die body through a bolt which penetrates through the through hole and is connected with the threaded hole.
Preferably, the two ends of the die body are also integrally formed with connecting reinforcing parts, the connecting reinforcing parts are positioned outside the ring crown die in the long axis direction of the die body, the die body is provided with two cooling channels, and the two ends of each cooling channel respectively extend to the two end faces of the connecting reinforcing parts; and a guide hole penetrating in the vertical direction is formed in the connection reinforcing portion.
Preferably, the two cooling runners are arranged in parallel, the longitudinal section of each cooling runner is sequentially divided into a first linear runner section, a fitting runner section and a second linear runner section along the long axis direction of the mold body, the first linear runner section and the second linear runner section are symmetrically and coaxially arranged, the fitting runner section is in a circular arc shape protruding towards the joint surface, the end part of the fitting runner section is not more than the projection of the outer contour of the upper mold core or the lower mold core in the long axis direction of the mold body, the circular arc circle center of the fitting runner section of the upper mold of the chain ring is higher than the axes of the first linear runner and the second linear runner in the vertical direction, and the circular arc circle center of the fitting runner section of the lower mold of the chain ring is lower than the axes of the first linear runner and the second linear runner in the vertical direction.
Preferably, the die body comprises a first body and a core-pulling block arranged in the first body, the center of the bottom surface of the first body is provided with a truncated cone-shaped cavity, the core-pulling block is of a structure which can be just embedded into the truncated cone-shaped cavity, the first linear flow channel section and the second linear flow channel section are respectively positioned on the first body at two sides of the truncated cone-shaped cavity, and the fitting flow channel section is positioned on the core-pulling block.
The utility model has the advantages that: the upper and lower dies of the chain ring adopt an internal and external positioning structure to ensure that the local matching precision is reduced under the stress state after die assembly, and the lower die of the chain ring is matched with a detachable ring crown die through a die core to realize the forming of the chain ring with high-precision core size; and the ring crown mould is installed through the inlaying groove of special structure to the mould body, avoids the too big mould damage that causes of horizontal direction atress, satisfies big specification chain ring shaping operating mode. The cooling runner adopts a plurality of subsections, the utilization can not only satisfy intensity, hardness index to the mould body under the large-tonnage shaping, can strengthen the local cooling effect of mould body again.
Drawings
Figure 1 is the utility model discloses compact chain precision forming die front view.
Fig. 2 is the utility model discloses compact chain precision forming die chain link goes up mould structure schematic diagram.
Fig. 3 is the utility model discloses compact chain precision forming die chain ring lower mould schematic structure.
Fig. 4 is a schematic structural view of the middle ring crown mold of the present invention.
Fig. 5 is a sectional view of the mold body of the lower mold for the middle chain ring of the present invention.
Detailed Description
As shown in fig. 1-3, the utility model discloses a chain ring precision forming mould, a precision forming for the chain ring, mould 1 and chain ring lower mould 2 on including the chain ring, mould 1 and chain ring lower mould 2 all include the mould body 11 that the structure is the same on the chain ring, and set up a pair of ring crown mould 12 at mould body 11 compound die surface both ends, mould 1's mould body compound die surface center integrated into one piece has last mould core 13 on the chain ring, this last mould core 13 is connected the segmental arc by two straightway both ends that are parallel to each other and is formed a confined and be located the waist type block on the horizontal plane, the centre at waist type block has a downwardly extending's location arch 14, this location arch 14 is the toper column structure that top-down reduces gradually. In this embodiment, the tapered pillar structure is a kidney-shaped structure in a horizontal cross section.
The mold body of the chain ring lower mold 2 is integrally formed with a lower mold core 15 at the center of the mold closing surface, the lower mold core 15 is a waist-shaped hole-shaped ring body which is formed by connecting two parallel straight line sections with two ends to form a closed arc section and is positioned on a horizontal plane, the outer ring side wall of the waist-shaped hole-shaped ring body is provided with a groove with an arc cross section and extends along the self circumferential direction, the arc groove is used for embedding the inner ring side wall of the chain ring, the arc is matched with the outer circle of the chain ring, and the inner ring of the waist-shaped hole-shaped ring body is a conical hole structure 16 which can be matched with a conical column structure. Fig. 2 shows only a schematic view of a structure in which a crown mold is installed.
The circular crown mold 12 is fixed at two ends of the mating surface of the mold body 11 by bolts (not shown in the figure), and defines one end of the circular crown mold close to the center of the mold body as a front end and one end far away from the center of the mold body as a rear end, as shown in fig. 4, an arc-shaped concave surface 12a for embedding the circular crown at the end of the chain ring is provided at the front end of the circular crown mold 12, and the arc-shaped concave surface 12a is specifically provided at the junction of the upper surface and the side surface of the front end of the circular crown mold 12.
Because the arc-shaped concave surface of the ring crown mold 12 receives the lateral force of the chain ring in the molding process of the molding mold, the contact part of the rear end of the ring crown mold and the mold body has larger stress, and the mold is easy to damage. In order to solve the problem, the whole service life of the forming die is prolonged. The utility model discloses in, the connection structure of ring crown mould 12 and mould body 11 does:
the circular crown mold 12 is a wedge-shaped block structure, the bottom surface of the circular crown mold 12 at least has a horizontal supporting surface 12b and an inclined supporting surface 12c, the inclined supporting surface 12c is gradually inclined upwards from the front end to the rear end of the circular crown mold 12, and the circular crown mold 12 is provided with at least one pair of through holes 12d penetrating from the upper surface to the horizontal supporting surface;
the two ends of the clamping surface of the die body 11 are respectively provided with an embedding groove for mounting the positioning ring crown die 12, the side wall of one side of the embedding groove close to the center of the die body is a vertical side wall 11b, the side wall of one side of the embedding groove far away from the center of the die body is an inclined side wall 11c with the same slope as that of an inclined supporting surface 12c, the bottom of the embedding groove is a horizontal bottom 11d matched with the horizontal supporting surface, and a threaded hole corresponding to the through hole is drilled in the horizontal bottom 11 d;
the crown mold 12 is fixed to the insert groove of the mold body 11 by bolts passing through the through holes to be coupled with the screw holes. Thus, when the chain ring upper die 1 and the chain ring lower die 2 are matched, the chain ring reaction horizontal force applied to the ring crown die 12 can be partially guided to the vertical direction, and the stress of the die body 11 in the horizontal direction is reduced.
In this embodiment, the two ends of the mold body 11 are further integrally formed with connection reinforcing parts 11a, the connection reinforcing parts 11a are located outside the crown mold 12 in the long axis direction of the mold body 11, the mold body 11 is provided with two cooling flow channels 17 extending along the long axis direction thereof, and the two ends of each cooling flow channel extend to the end faces of the connection reinforcing parts 11 a; the connection reinforcing portion 11a is provided with a guide hole penetrating in the vertical direction. In this embodiment, the width of the connection reinforcement portion 11a is greater than the width of the mold body 11, so as to improve the force-receiving performance of the connection reinforcement portion.
The utility model discloses in, twice cooling runner sets up side by side, as shown in fig. 5, cooling runner 17's longitudinal section is dividing into first straight line runner section 171 in proper order along the major axis direction of mould body, laminating runner section 173 and second straight line runner section 172, first straight line runner section 171, second straight line runner section 172 symmetry and coaxial setting, laminating runner section 173 is convex upwards, laminating runner section 173's tip is no longer than the outer loop projection of waist type poroid ring body on mould body 11 major axis direction, and the convex centre of a circle of laminating runner section 173 is less than first straight line runner 171 in the vertical direction, second straight line runner 172 axis. The position and the shape of the fitting runner section 173 are set so as to effectively reduce the structural deformation influence caused by the stress of the mold body in the molding process.
In order to facilitate processing of the above flow channel, the mold body 11 includes a first body 111 and a core pulling block 112 embedded in the first body, a truncated cone-shaped cavity is formed in the center of the bottom surface of the first body 111, the core pulling block 112 is a structure capable of being just embedded into the truncated cone-shaped cavity, and the core pulling block 112 adopts a casting structure, wherein the first linear flow channel 171 and the second linear flow channel 172 are respectively located on the first body 111 on two sides of the truncated cone-shaped cavity, and the attachment flow channel 173 is located on the core pulling block 112. The end parts of the interfaces of the first linear flow channel 171, the second linear flow channel 172 and the attachment flow channel 173 are all provided with butt joint sections, and the diameters of the butt joint sections are larger than the diameters of the non-interface flow channels of the first linear flow channel 171, the second linear flow channel 172 and the attachment flow channel 173. An annular sealing groove is formed in the periphery of the two ends of the core pulling block 112, which are attached to the runner segment 173, and a sealing ring 174 is embedded in the annular sealing groove.
The utility model discloses in, adopt the method of above-mentioned chain ring precision forming mould shaping chain ring to the compact ring that stands of mining high strength, specification phi 42 is 146mm (nominal diameter is interior length) for example, and its step is in proper order:
s1: bending the steel circle to form a chain ring blank, and blanking through a band sawing machine: phi 42 x 475mm (nominal diameter material length), adopting automatic chain-knitting and welding machine to make blank, the specification of chain ring blank is: phi 42, 143, 50, 135mm (nominal diameter, inner length, inner width, outer width); s2: placing a chain ring blank on a lower chain ring die through auxiliary equipment, sleeving an inner ring of the chain ring blank outside a lower die core, and locally supporting an end annular section of the chain ring blank on an arc-shaped concave surface of a ring crown die;
in this embodiment, the dimension of the upper and lower mold cores in the length direction is 144mm, the dimension of the upper and lower mold cores in the width direction is 48mm, the distance between the two ring crown molds is 230 ± 0.5mm, and the width of the mold body is 115 mm.
S3: installing a chain ring precision forming die on a die frame of a hydraulic forming machine, wherein the hydraulic forming machine is provided with a pair of floating left and right horizontal pressing heads driven by a side cylinder and a main cylinder for closing an upper die and a lower die of a chain ring,
during molding:
firstly, the upper die of the chain ring descends and the lower die of the chain ring are matched, and the upper surface and the lower surface of the chain ring blank are extruded, so that the metal material with the thickness exceeding the standard thickness h in the chain ring blank is extruded and filled between the upper die and the lower die of the chain ring, and the thickness of the chain ring blank is controlled; moving the chain ring precision forming die through the right horizontal pressure head to extrude the side surface of the chain ring blank until the straight line section of the side surface of the chain ring blank is tightly attached to the arc-shaped grooves of the upper die core and the lower die core, and simultaneously moving the die carrier integrally to the left horizontal pressure head to realize the floating pressing of the left horizontal pressure head and the right horizontal pressure head, so that the width of the inner ring of the chain ring blank is matched with the width of the die core, and the control of the width of the inner ring of the chain ring blank is realized; meanwhile, the diameter control of the straight-line section of the chain ring blank on the side surface is realized by the matching of the arc-shaped groove of the mold core and the left and right horizontal pressure heads;
in the moving process of the right horizontal pressure head, the length of the outer ring of the chain ring blank is controlled by matching two ring crown molds of the upper mold and the lower mold of the chain ring, meanwhile, the minimum length of the inner ring of the chain ring blank is limited by the length of the mold core, and the temperature of the chain ring blank is controlled to be kept between 600 ℃ and 900 ℃ in the extruding process by cooling water in a cooling runner, so that the accurate control of the length of the inner ring of the chain ring blank is realized; in addition, circulating cooling water is required to ensure that the cooling mold surface temperature is less than 150 ℃.
S4: and (3) after the left horizontal pressure head and the right horizontal pressure head are kept in a clamping state for 3-5 seconds, retreating, and then moving the chain ring upper die upwards to demould to complete the forming of the chain ring.
The link product specification finally manufactured by the method in the embodiment is as follows: phi 42 x 146 x 48 x 115mm (nominal diameter inner length inner width outer width), which fully meets the criteria: MT/T929-2004.
Claims (5)
1. A compact chain precision forming die for precision forming of chain rings, characterized in that: comprises a chain ring upper die and a chain ring lower die,
the chain ring upper die and the chain ring lower die respectively comprise die bodies with the same structure and a pair of ring crown dies arranged at two end parts of a die assembly surface of the die bodies,
an upper mold core is integrally formed in the center of a mold body matching surface of the chain ring upper mold, the upper mold core is formed into a closed waist-shaped block body which is positioned on a horizontal plane by connecting two parallel straight line sections with arc sections at two ends, and a positioning bulge extending downwards is arranged in the center of the waist-shaped block body and is of a conical column structure which is gradually reduced from top to bottom;
the mold comprises a mold body, a mold core and a mold core, wherein the mold core is integrally formed in the center of a mold body joint surface of the chain ring lower mold, the lower mold core is a waist-shaped hole-shaped ring body which is formed by connecting two parallel straight line sections and two ends of the arc sections to form a closed horizontal plane, the outer ring side wall of the waist-shaped hole-shaped ring body is provided with a groove, the cross section of the groove is arc and extends along the circumferential direction of the groove, the arc-shaped groove is used for embedding the inner ring side wall of the chain ring, and the inner ring of the waist-shaped hole-shaped ring body is a conical hole structure which can be matched with the conical column structure;
the limiting ring crown mold is characterized in that one end, close to the center of the mold body, of the limiting ring crown mold is the front end, one end, far away from the center of the mold body, of the limiting ring crown mold is the rear end, an arc-shaped concave surface used for embedding the ring crown at the end part of the chain ring is arranged at the front end of the ring crown mold, and the ring crown mold is fixed at the two end parts of the mold matching surface of the mold body through bolts.
2. The compact chain precision forming die of claim 1, wherein:
the annular crown mould is of a wedge-shaped block structure, the bottom surface of the annular crown mould is at least provided with a horizontal supporting surface and an inclined supporting surface, the inclined supporting surface is gradually inclined upwards from the front end to the rear end of the annular crown mould, and the annular crown mould is provided with at least one pair of through holes penetrating from the upper surface to the horizontal supporting surface;
the mold comprises a mold body, a positioning ring crown mold, an embedding groove, a supporting ring, a positioning ring crown mold and a positioning ring crown mold, wherein the two ends of a mold clamping surface of the mold body are respectively provided with the embedding groove for mounting the positioning ring crown mold, the side wall of one side, close to the center of the mold body, of the embedding groove is a vertical side wall, the side wall, far away from the center of the mold body, of the embedding groove is an inclined side wall with the same slope as that of an inclined supporting surface, the bottom of the embedding groove is a horizontal groove bottom matched with the horizontal supporting surface, and a threaded hole corresponding to a through hole is drilled in the bottom of the horizontal groove;
the ring crown die is fixed in the embedding groove of the die body through a bolt which penetrates through the through hole and is connected with the threaded hole.
3. The compact chain precision forming die of claim 1 or 2, wherein: the two ends of the die body are also integrally formed with connecting reinforcing parts, the connecting reinforcing parts are positioned at the outer side of the circular crown die in the long axis direction of the die body, the die body is provided with two cooling flow channels, and the two ends of each cooling flow channel respectively extend to the two end faces of the connecting reinforcing parts; and a guide hole penetrating in the vertical direction is formed in the connection reinforcing portion.
4. The compact chain precision forming die of claim 3, wherein: the two cooling runners are arranged in parallel, the longitudinal section of each cooling runner is sequentially divided into a first straight runner section, a fitting runner section and a second straight runner section along the long axis direction of the die body, the first straight runner section and the second straight runner section are symmetrically and coaxially arranged, the fitting runner section is in a circular arc shape protruding towards the matched surface, the end part of the fitting runner section does not exceed the outer contour projection of the upper die core or the lower die core in the long axis direction of the die body, the circular arc circle center of the fitting runner section of the upper die of the chain ring is higher than the axes of the first straight runner and the second straight runner in the vertical direction, and the circular arc circle center of the fitting runner section of the lower die of the chain ring is lower than the axes of the first straight runner and the second straight runner in the vertical direction.
5. The compact chain precision forming die of claim 4, wherein: the die body comprises a first body and a core-pulling block arranged in the first body, a truncated cone-shaped cavity is arranged in the center of the bottom surface of the first body, the core-pulling block is of a structure which can be just embedded into the truncated cone-shaped cavity, the first linear flow channel section and the second linear flow channel section are respectively positioned on the first body on two sides of the truncated cone-shaped cavity, and the attaching flow channel section is positioned on the core-pulling block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022435752.4U CN214684123U (en) | 2020-10-28 | 2020-10-28 | Compact chain precision forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022435752.4U CN214684123U (en) | 2020-10-28 | 2020-10-28 | Compact chain precision forming die |
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| Publication Number | Publication Date |
|---|---|
| CN214684123U true CN214684123U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022435752.4U Active CN214684123U (en) | 2020-10-28 | 2020-10-28 | Compact chain precision forming die |
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| CN (1) | CN214684123U (en) |
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2020
- 2020-10-28 CN CN202022435752.4U patent/CN214684123U/en active Active
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