CN105618707A - Core pulling device and core pulling method - Google Patents
Core pulling device and core pulling method Download PDFInfo
- Publication number
- CN105618707A CN105618707A CN201511024940.5A CN201511024940A CN105618707A CN 105618707 A CN105618707 A CN 105618707A CN 201511024940 A CN201511024940 A CN 201511024940A CN 105618707 A CN105618707 A CN 105618707A
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- Prior art keywords
- core
- docking
- long
- pulling device
- loosed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a core pulling device. The core pulling device comprises a first butt-joint long core puller, a second butt-joint long core puller, a first butt-joint core pulling slider mechanism, a second butt-joint core pulling slider mechanism, first hydraulic equipment and second hydraulic equipment. The first butt-joint core pulling slider mechanism and the second butt-joint core pulling slider mechanism are arranged at two ends of the core pulling device, and are respectively connected with one end of the first butt-joint long core puller and one end of the second butt-joint long core puller. The other end of the first butt-joint long core puller and the other end of the second butt-joint long core puller are combined together tightly to form a core pulling butt-joint structure. The first butt-joint core pulling slider mechanism and the second butt-joint core pulling slider mechanism are respectively connected with the first hydraulic equipment and the second hydraulic equipment. Through design precision of butt-joint core pulling and matching of core pulling sliders, machining allowance of products can be controlled within 1.2 mm, meanwhile eccentricity is controlled within 0.3, weight of blanks of the products and the machining allowance are reduced, and manufacturing and machining costs of the blanks are reduced.
Description
Technical field
The present invention relates to mould applications, and relate more specifically to a kind of core-pulling device and core pulling method.
Background technology
For the die casting of aluminium alloy, ensure that product size tolerance is a key point. Especially the eccentricity issues that when blank is produced, length is loosed core is easy to cause bulk article in the course of processing owing to foundry goods bias causes the black skin phenomenon of monolateral processing, and then cause product rejection, the length-to-diameter ratio loosed core in usual Design Theory is less than 5, such fuse is not flexible, intensity is enough, it is possible to meet need of production. But length-to-diameter ratio of often loosing core in actual product is greater than 5.
Offset issue of loosing core in electric steering gear die casting for shell, annoyings die casting industry always. The black skin defect of processing loosed core and design to avoid bias to cause, diameter of loosing core reduces, and artificially increases process redundancy, and being typically designed to monolateral process redundancy is 2mm, causes two problems like this: one, product weight increases, cost increase; Two, monolateral process redundancy increases, when loose core bias time, process redundancy can reach 3mm, and the other side is 1mm, it is easy to causes process tool unbalance stress cause disconnected cutter or allow cutter situation.
The object of the present invention, exactly in order to reduce in product die casting, the product rejection caused owing to deviation of loosing core causes size bad, makes mould process be able to perfect, provides more effective approach for improving product local quality.
Summary of the invention
A kind of core-pulling device that the present invention be directed to above-mentioned the deficiencies in the prior art and provide and core pulling method.
For achieving the above object, the technical scheme that the present invention takes is as follows:
A kind of core-pulling device, it comprises, and the first docking length is loosed core, the 2nd docking length is loosed core, core-pulling slide block mechanism, the first hydraulic efficiency installation and the 2nd hydraulic efficiency installation are docked in the first docking core-pulling slide block mechanism, the 2nd, wherein
Described first docking core-pulling slide block organization establishes, in one end of described core-pulling device, is connected with described first long one end loosed core of docking; Described 2nd docking core-pulling slide block mechanism is arranged on the other end of described core-pulling device symmetrically, is connected with described 2nd long one end loosed core of docking; The described first long the other end loosed core of docking forms, together with being closely combined in the described 2nd long the other end loosed core of docking, docking structure of loosing core; Described first docking core-pulling slide block mechanism and described 2nd docking core-pulling slide block mechanism connect described first hydraulic efficiency installation and the 2nd hydraulic efficiency installation respectively, for long the loosing core of described first docking being loosed core with described 2nd docking is long in contrary direction by hydraulic pressure simultaneously.
Further, at described docking structure place of loosing core, the long end loosing core in loosing core with described 2nd docking length of described first docking is provided with projection, another end is provided with and the groove of described male cooperation, and described first docking is long looses core and together with described 2nd docking grown and loose core and be closely combined in described groove by described projection.
Further, at described docking structure place of loosing core, the long tolerance of dimension loosed core with described 2nd docking length of loosing core of described first docking is �� 0.05, ensures the precision of docking.
Further, described core-pulling device comprises the length being arranged on described core-pulling device inside and looses core cooling structure, for reducing the long temperature loosed core in long-time production process, prevents long loosing core from high temperature occurring deformation to bend.
Further, when product die casting loose core length-to-diameter ratio > 5 simultaneously whole loose core length > 300mm time, adopt described core-pulling device to loose core.
Adopting above-mentioned core-pulling device to carry out the method loosed core, it comprises the following steps:
During the demoulding, start the first hydraulic efficiency installation and the 2nd hydraulic efficiency installation, by driving the first docking core-pulling slide block mechanism and the 2nd docking core-pulling slide block mechanism in the opposite direction to loose core and the 2nd docking is long looses core to the first docking is long simultaneously.
Further, pattern draft of loosing core is designed to 5-10 ��, ensures that its demoulding is smooth and easy.
Further, when product die casting loose core length-to-diameter ratio > 5 simultaneously whole loose core length > 300mm time, adopt described core pulling method.
Owing to adopting above technical scheme, the useful effect of the present invention comprises: operation of being loosed core by a whole root length core in prior art has been improved by the present invention, one whole root length being loosed core and be divided into two root lengths to loose core carrying out operation of loosing core, such length-to-diameter ratio reduces, make long loose core not flexible. Adopting the core-pulling device of the present invention, the long length-to-diameter ratio loosed core can reach 8-10. By docking the cooperation of design accuracy and the core-pulling slide block loosed core, the demoulding gradient loosed core is increased 2-5 �� simultaneously, can Product processing surplus be controlled within 1.2mm, eccentricity control is within 0.3mm simultaneously, alleviating product blank weight and process redundancy like this, greatly reduce blank manufacture and tooling cost, reducing of process redundancy can improve process velocity and cutting amount with eccentric improvement simultaneously, decrease processing beat and the disconnected cutter situation of cutter, it is to increase working (machining) efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the mould comprising core-pulling device provided by the invention;
Fig. 2 is the part sectioned view of Fig. 1;
Fig. 3 is the partial enlargement figure of the docking structure of loosing core in Fig. 2.
Description of reference numerals
1 first docking is long looses core; 2 the 2nd docking are long looses core; 3 first docking core-pulling slide block mechanisms; 4 the 2nd docking core-pulling slide block mechanisms, 5 loose core docking structure; 6 long cooling structures of loosing core.
Embodiment
For reaching fully disclosed object, below with reference to drawings and Examples, the present invention is described in further details. It is to be understood that the specific embodiment of the following stated is only for explaining the present invention, it is not intended to limit protection scope of the present invention.
The present invention provides a kind of core-pulling device. As shown in Figure 1, this core-pulling device comprises the first docking length and looses core long 2, the first docking core-pulling slide block mechanism 3 of loosing core of the 1, the 2nd docking, the 2nd docking core-pulling slide block mechanism 4. First docking core-pulling slide block mechanism 3 is arranged on one end of this core-pulling device, long with the first docking loose core 1 one end be connected. 2nd docking core-pulling slide block mechanism 4 is arranged on the other end of this core-pulling device symmetrically, long with the 2nd docking loose core 2 one end be connected. First docking is long loose core 1 and the 2nd docking long loose core 2 settings point-blank. First docking is long loose core 1 the other end long with the 2nd docking loose core 2 the other end be closely combined in together with, form docking structure 5 of loosing core. As shown in Figures 2 and 3, at docking structure 5 place of loosing core, 2nd docking is long loose core 2 end be provided with projection, the first docking is long loose core 1 end be provided with the groove with male cooperation, the first docking is long loose core 1 long with the 2nd docking loose core 2 by protruding be closely combined in groove together with. The arranging of protruding and groove can ensure before loosing core the first docking long loose core 1 loose core with the 2nd docking length 2 be combined in more closely together with. This core-pulling device also comprises the first hydraulic efficiency installation and the 2nd hydraulic efficiency installation (not shown in figure 1). First hydraulic efficiency installation and the 2nd hydraulic efficiency installation connect the first docking core-pulling slide block mechanism and the 2nd docking core-pulling slide block mechanism respectively, for by hydraulic pressure drive the first docking core-pulling slide block mechanism 3 and the 2nd docking core-pulling slide block mechanism 4 in the opposite direction simultaneously to the first docking long loose core 1 and the 2nd long the loosing core of docking 2 loose core.
In technique scheme, at docking structure 5 place of loosing core, the first docking is long loose core 1 and the 2nd docking long loose core 2 tolerance of dimension be �� 0.05, ensure the precision docked.
In technique scheme, owing to die casting aluminium liquid temp is up to 650 DEG C, in order to prevent long at high temperature bending of loosing core, long cooling structure 6 (as shown in Figure 2) of loosing core is set in core-pulling device inside, ensure that in long-time production process, the long temperature loosed core is lower.
When product die casting loose core length-to-diameter ratio > 5 simultaneously whole loose core length > 300mm time, adopt above-mentioned core-pulling device to loose core.
Adopt above-mentioned core-pulling device to carry out the method loosed core, comprise the following steps:
During the demoulding, start the first hydraulic efficiency installation and the 2nd hydraulic efficiency installation, by drive the first docking core-pulling slide block mechanism 3 and the 2nd docking core-pulling slide block mechanism 4 in contrary direction simultaneously to the first docking long loose core 1 and the 2nd long the loosing core of docking 4 loose core.
In technique scheme, pattern draft of loosing core is designed to 5-10 ��, ensures that its demoulding is smooth and easy.
When product die casting loose core length-to-diameter ratio > 5 simultaneously whole loose core length > 300mm time, adopt aforesaid method loose core.
Owing to adopting above technical scheme, the useful effect of the present invention comprises: operation of being loosed core by a whole root length core in prior art has been improved by the present invention, one whole root length being loosed core and be divided into two root lengths to loose core carrying out operation of loosing core, such length-to-diameter ratio reduces, make long loose core not flexible. Adopting the core-pulling device of the present invention, the long length-to-diameter ratio loosed core can reach 8-10. By docking the cooperation of design accuracy and the core-pulling slide block loosed core, the demoulding gradient loosed core is increased 2-5 �� simultaneously, can Product processing surplus be controlled within 1.2mm, eccentricity control is within 0.3mm simultaneously, alleviating product blank weight and process redundancy like this, greatly reduce blank manufacture and tooling cost, reducing of process redundancy can improve process velocity and cutting amount with eccentric improvement simultaneously, decrease processing beat and the disconnected cutter situation of cutter, it is to increase working (machining) efficiency.
The above is only the preferred embodiment of the present invention; it is noted that for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a core-pulling device, it is characterised in that, comprise that the first docking length is loosed core, the 2nd docking long is loosed core, the first docking core-pulling slide block mechanism, the 2nd docking core-pulling slide block mechanism, the first hydraulic efficiency installation and the 2nd hydraulic efficiency installation, wherein
Described first docking core-pulling slide block organization establishes, in one end of described core-pulling device, is connected with described first long one end loosed core of docking; Described 2nd docking core-pulling slide block mechanism is arranged on the other end of described core-pulling device symmetrically, is connected with described 2nd long one end loosed core of docking; The described first long the other end loosed core of docking forms, together with being closely combined in the described 2nd long the other end loosed core of docking, docking structure of loosing core; Described first docking core-pulling slide block mechanism and described 2nd docking core-pulling slide block mechanism connect described first hydraulic efficiency installation and the 2nd hydraulic efficiency installation respectively, for long the loosing core of described first docking being loosed core with described 2nd docking is long in contrary direction by hydraulic pressure simultaneously.
2. core-pulling device according to claim 1, it is characterized in that, at described docking structure place of loosing core, the long end loosing core in loosing core with described 2nd docking length of described first docking is provided with projection, another end is provided with and the groove of described male cooperation, and described first docking is long looses core and together with described 2nd docking grown and loose core and be closely combined in described groove by described projection.
3. core-pulling device according to claim 2, it is characterised in that, at described docking structure place of loosing core, the long tolerance of dimension loosed core with described 2nd docking length of loosing core of described first docking is �� 0.05, ensures the precision of docking.
4. core-pulling device according to claim 1, it is characterized in that, described core-pulling device comprises the length being arranged on described core-pulling device inside and looses core cooling structure, for reducing the long temperature loosed core in long-time production process, prevents long loosing core from high temperature occurring deformation to bend.
5. core-pulling device according to the arbitrary item in Claims 1-4, it is characterized in that, when product die casting loose core length-to-diameter ratio > 5 simultaneously whole loose core length > 300mm time, adopt described core-pulling device to loose core.
6. one kind adopts the core-pulling device described in arbitrary item in claim 1-5 to carry out the method loosed core, it is characterised in that, comprise the following steps:
During the demoulding, start the first hydraulic efficiency installation and the 2nd hydraulic efficiency installation, by driving the first docking core-pulling slide block mechanism and the 2nd docking core-pulling slide block mechanism in the opposite direction to loose core and the 2nd docking is long looses core to the first docking is long simultaneously.
7. method according to claim 6, it is characterised in that, pattern draft of loosing core is designed to 5-10 ��, ensures that its demoulding is smooth and easy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024940.5A CN105618707A (en) | 2015-12-31 | 2015-12-31 | Core pulling device and core pulling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024940.5A CN105618707A (en) | 2015-12-31 | 2015-12-31 | Core pulling device and core pulling method |
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| Publication Number | Publication Date |
|---|---|
| CN105618707A true CN105618707A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511024940.5A Pending CN105618707A (en) | 2015-12-31 | 2015-12-31 | Core pulling device and core pulling method |
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| CN (1) | CN105618707A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118166A (en) * | 1990-09-04 | 1992-04-20 | Hitachi Ltd | Injection molding method and injection molding mold and injection molding |
| EP0827795A2 (en) * | 1996-09-04 | 1998-03-11 | Toyota Jidosha Kabushiki Kaisha | Method of integrally attaching hollow member to cast product by casting and apparatus therefor |
| CN201684913U (en) * | 2010-05-31 | 2010-12-29 | 广东鸿特精密技术股份有限公司 | Die-casting mould with improved structure |
| CN101961775A (en) * | 2010-09-30 | 2011-02-02 | 凡嘉科技（无锡）有限公司 | Casting die sliding block core-pulling structure for lock core |
| CN203711804U (en) * | 2014-01-16 | 2014-07-16 | 浙江亚路铸造有限公司 | Coaxial, bidirectional and ultra-long hole core-pulling positioning mechanism of die casting mould |
| CN204220943U (en) * | 2014-09-16 | 2015-03-25 | 宁波辉旺机械有限公司 | A kind of steering gear cast tube prevents the structure of long drawing crack foundry goods of loosing core |
| CN205217994U (en) * | 2015-12-31 | 2016-05-11 | 太仓海嘉车辆配件有限公司 | Core pulling device |
-
2015
- 2015-12-31 CN CN201511024940.5A patent/CN105618707A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118166A (en) * | 1990-09-04 | 1992-04-20 | Hitachi Ltd | Injection molding method and injection molding mold and injection molding |
| EP0827795A2 (en) * | 1996-09-04 | 1998-03-11 | Toyota Jidosha Kabushiki Kaisha | Method of integrally attaching hollow member to cast product by casting and apparatus therefor |
| CN201684913U (en) * | 2010-05-31 | 2010-12-29 | 广东鸿特精密技术股份有限公司 | Die-casting mould with improved structure |
| CN101961775A (en) * | 2010-09-30 | 2011-02-02 | 凡嘉科技（无锡）有限公司 | Casting die sliding block core-pulling structure for lock core |
| CN203711804U (en) * | 2014-01-16 | 2014-07-16 | 浙江亚路铸造有限公司 | Coaxial, bidirectional and ultra-long hole core-pulling positioning mechanism of die casting mould |
| CN204220943U (en) * | 2014-09-16 | 2015-03-25 | 宁波辉旺机械有限公司 | A kind of steering gear cast tube prevents the structure of long drawing crack foundry goods of loosing core |
| CN205217994U (en) * | 2015-12-31 | 2016-05-11 | 太仓海嘉车辆配件有限公司 | Core pulling device |
Non-Patent Citations (1)
| Title |
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| 《特种铸造手册》编写组: "《特种铸造手册 下册》", 31 August 1978 * |
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Application publication date: 20160601 |