离合器膜片弹簧、碟形弹簧成型模具

本发明公开了一种离合器膜片弹簧、碟形弹簧成型模具，包括设有冷却槽的上模及下模，下模内设有定位芯，所述上模及下模内的冷却槽为环形冷却槽，所述上模及下模内的环形冷却槽通过管道相互连通，上模及下模上设有连通外界冷却液的连接口。本发明能有效提高膜片弹簧、碟形弹簧的成型质量，可以增加成型模具的强度、延长成型模具的使用寿命。     

塑料模的试模与维修

在塑料模制造基本完成后（镜面或有要求的表面还没有精抛光），必先上机试模。其目的是提早发现模具设计及制造中的问题，以便及时对模具加以改进和修正，同时通过试模，初步提供塑件的成型条件。为此，模具设计人员应对塑件成型性能、成型工艺、成型设备、模具安装等技术应有足够的了解，并亲临现场参加试模验证，对出现的问题拟订正确的修模方案，以节约工时，减少试模次数。１试模前模具检查，主要是模具外观检查（１）模具闭合高度，模具与机床各部位配合尺寸，顶出形式，开模距离，模具工作要求等应付合设备条件。（２）模具外露部分锐…     

塑料片材凹模成型工艺的分类及成型机理

塑料片材凹模成型工艺的分类及成型机理扬子设备模具制造有限公司（安徽滁州２３９０６４）胡德云１引言凹模成型是指将加热软化的ＡＢＳ、ＨＩＰＳ片材经抽真空吸附在凹模内表面的一种成型方法。由于凹模成型具有成型圆角小，脱模容易，且由于制件外形同模具接触，因此制...     

压制成型塑料模具钢的选择

概述了塑料成型技术及塑料成型模具，介绍了塑料制品的压制成型，重点讨论了塑料压制成型模具对材料的要求，压模材料选择及热处理。     

专利名称：热成型模具

本发明涉及一种热成型模具，包括一个上模和一个下模，其中，上模和下模分别包括一个基板、一个固定在基板上的成型颚板和一个同样固定在基板上的芯子，并且在芯子与成型颚板的面向芯子的背面之间构成一个通道系统。用以导过冷却剂。在此至少成型颚板构成为铸件。由于所述成型颚板的这种制造方法，可以大大降低热成型模具的制造成本，     

断路器转轴压注模设计

介绍了断路器转轴的结构特点和成型工艺难点,完成了压注模成型结构设计;分析了模具加料系统、模具隔热结构设计、模内切浇口结构设计、模具成型零件设计等。结果表明,保证了塑件的内在及外观质量,提高了模具压注效率和模具使用寿命,节约了能源。     

莲蓬头手柄注射模设计

综合莲蓬头手柄材料及结构特点，设计了1副1模8腔多板式注射模成型，模具使用潜伏式侧浇口对8个型腔进行浇注。为顺利取出成型塑件，模具分3次开模，以驱动机构件完成成型塑件脱模，首先利用液压缸活塞杆驱动外螺纹型芯旋转脱螺纹，其次依靠模具打开动作实施内环槽强制脱模，然后模板打开驱动弯管型芯旋转抽芯，最后推板推出成型塑件实现完全脱模。     

锌合金成型汽车灯壳模具技术

开发了锌合金在成型汽车灯壳模具所采用的实用性技术。先铸造汽车灯壳的铸铁凸模，再以铸铁凸模为基础，在凸模上直接浇注成型锌合金凹模。这种方法的特点是凹模型面尺寸比较准确、容易控制，而且由于凹模是低熔点合金，不会对凸模造成破坏。其制作过程为首先用灰口铸铁制成凸模，将制好的凸模放在平台上，根据凹模外形轮廓尺寸做围框，在凸模上涂一层涂料间隙层，再在围框周围用型砂密封，最后熔化锌合金进行浇注。成型后的模具经试模，一次成功，完全达到使用要求。通过以上方法，实现了快速、低成本的模具制作。     

断路器转轴压缩模设计

简述了断路器转轴的结构特点,针对其成型工艺难点提出相应方案,完成了压塑模成型结构设计,并介绍了模具加料系统、模内隔热结构设计、上模抽芯、成型零件设计。结果表明,保证了制品的内在和外观质量,提高了模具压制效率和模具使用寿命,节约了能源。     

凸模吸塑成型抽芯机构设计

１引言塑料片材（ＨＩＰＳ、ＡＢＳ）吸塑成型模按其成型的方式可分为凸模成型和凹模成型。凸模成型因配套设备、成型工艺及模具制造工艺均比凹模成型简单，且投入的成本较低，所以目前在国内凸模成型（尤其外形较大的塑件）仍普遍使用。根据塑料片材成型的工艺特点，为了...     

A double control forming technology combining die casting and forging for the production of Mg alloy components with enhanced properties

A double control forming technology combining the die casting and forging was firstly proposed for the production of Mg alloy components with enhanced properties. In this technology, high-speed filling of liquid melt and high-pressure forging of partially solidified melt were performed by using injection and forging systems of a double control forming device. Some Mg alloy motorcycle wheel components were produced by die casting and double control forming to verify the improvement of the mechanical properties of components formed by double control forming. The results showed that double control forming was an alternative technology for producing the complex Mg alloy components with enhanced properties. Average tensile strength and elongation of Mg alloy components produced by double control forming were greatly improved in comparison with die casting. The average tensile strength was enhanced from 126.8 MPa to 213 MPa and elongation was improved from 3.5% to 7.2%. The optimal process parameters were obtained according to the results of orthogonal experiments, which involved pouring temperature of 675 °C, injection speed of 2 m/s and die temperature of 210 °C. The improved nucleation frequency in the melt caused by the forging pressure led to successful grain refinement of the microstructure of the component produced by double control forming. The defects were removed from the microstructure due to plastic deformation caused by the forging pressure. A refined and densified microstructure led to an enhancement of mechanical properties of Mg alloy component produced by double control forming.     

STUDY ON THE NUMERICAL SIMULATION OF MULTI-STAGE ROTARY FORGING OF A NON-AXISYMMETRIC PART AND THE CAE ANALYSIS OF THE DIE STRENGTH

Traditionally a rotary forging process is a kind of metal forming method where a conic upper die, whose axis is deviated an angle from the axis of machine, forges a billet continuously and partially to finish the whole deformation. For the rotary forging process simulation, more researches were focused on simulating the simple stage forming process with axisymmetric part geometry. Whereas in this paper, the upper die is not cone-shaped, and the billet is non-axisymmetric. So the movement of the punch is much more complicated than ever. The 3D FEM simulation models for the preforming ＆ final forming processes are set up aider carefully studying the complicated movement pattern. Deform-3D is used to simulate the material flow, and the boundary nodal resisting forces calculated by the final stage process simulation is used to analyze the final forming die strength. The CAE analysis of the die shows that the design of the final forming die is not reasonable with lower pre-stress which is easy to crack at the critical corners. An optimum die design is also provided with higher pre-stress, and verified by CAE analysis.     

模具CAPP系统研究与探讨

在分析CAPP技术现状及发展趋势的基础上,结合模具零件加工工艺设计现状和存在的问题,提出了面向模具制造的CAPP系统的总体框架结构及各功能模块主要实现功能,编制了模具CAPP系统基础支撑软件——面向模具制造的工艺数据库管理系统,开发了模具结构件和标准件典型工艺检索系统和模具成形零件工艺生成系统。     

Electro-hydraulic forming of sheet metals: Free-forming vs. conical-die forming

This work builds upon our recent advances in quantifying high-rate deformation behavior of sheet metals, during electro-hydraulic forming (EHF), using high-speed imaging and digital image correlation techniques. Aluminum alloy AA5182-O and DP600 steel sheets (1 mm thick, ∼152 mm diameter) were EHF deformed by high-energy (up to ∼34 kJ) pressure-pulse in an open die (free-forming) and inside a conical die. The deformation history (velocity, strain, strain-rate, and strain-path) at the apex of the formed domes was quantified and analyzed. The data shows that the use of a die in the EHF process resulted in an amplification, relative to free-forming conditions, of the out-of-plane normal velocity and in-plane strain-rate at the dome apex. This amplification is attributed to the focusing action of the die on account of its conical geometry. Further, while the strain-path at the dome apex was generally linear and proportional, the use of a die resulted in greater strain at the apex relative to the strain during free-forming. The sheet deformation profile in the EHF process was found to be different from that previously observed in electromagnetic forming (EMF) and, thus, the two processes are expected to result in different strain-paths and formability. It is anticipated that quantitative information of the sheet deformation history, made possible by the experimental technique developed in this work, will improve our understanding of the roles of strain-rate and sheet-die interactions in enhancing the sheet metal formability during high-rate forming.     

铝合金板温成形过程中凸凹模圆角处摩擦的测量

在温成形过程中铝合金板与模具表面的接触和摩擦行为十分复杂,不同的接触区域摩擦状况不尽相同。本文分析了板料成形中摩擦测量的国内外发展状况,采用自行设计的新型摩擦测量装置完成了铝合金板温成形过程中凸凹模圆角处摩擦系数的测量。该测量装置的特点是可以模拟板料的真实变形过程,因而可以获得更为准确的测量结果。     

A new technology for the joining by forming of magnesium alloys

Joining by forming of magnesium alloys is restricted by the limited forming capability of magnesium at room temperature. To form acceptable joints without cracks usually heating of the parts to temperatures of 220°C or more is required. The application of state-of-the-art joining by forming methods (such as self-pierce-riveting or clinching with a contoured die) implicates pre-heating times of at least 3–6 s to achieve joints of acceptable quality. A new joining by forming technology, that is working with a flat anvil as a counter tool instead of the contoured die shall be introduced in this paper. This new technology is offering important advantages especially in joining Mg/Mg, Al/Mg or Fe/Mg connections, most remarkably being the reduction of pre-heating times to less than 1 s, thus allowing for the fast and reliable joining of magnesium parts. Parameter influences on the formation of the connections have been investigated and the values for the tensile strength have been determined for a wide range of connections.     

Effects of temperature and blank holding force on biaxial forming behavior of aluminum sheet alloys

Biaxial forming behavior is investigated for three aluminum sheet alloys (Al 5182 containing 1% Mn (5182+Mn), Al 5754, and 6111-T4) using a heated die and punch in the warm forming temperature range of 200–350 °C. It is found that, while all three alloys exhibit significant improvement in their formability compared with that at room temperature, the non-heat-treatable alloys 5182 + Mn and 5754 give higher part depths than that of heat-treatable 6111-T4. The formability generally increases with decreasing BHP (BHP), but increasing the forming temperature and/or BHP minimizes the wrinkling tendency and improves the forming performance. The stretchability of the sheet alloys increase with increasing temperature and increasing BHP. For the alloys and forming conditions involved in the current study, the formability, measured in terms of part depth, comes mainly from the drawing of metal into the die cavity, although stretching effects do influence the overall forming behavior. The optimum formability is achieved by setting the die temperature 50 °C higher than the punch temperature to enhance the drawing component. Setting the die temperature higher than the punch temperature also improves the strain distribution in a part in such a manner that postpones necking and fracture by altering the location of greatest thinning.     

模具可重构技术与杆系柔性成形模具

介绍了目前国内外在可重构板料冲压成形模具应用研究方面的成果,讨论了在应用研究中仍存在的问题和进一步的研究发展方向.同时提出可重构的杆系柔性成形模,该模具具有"模内压板成形"冲压工艺,可以有效地控制板料的起皱.试验表明可重构的杆系柔性成形模具可以快速地重构板料冲压成形模具,达到"一模多用"的目的,具有优良的板料冲压成形特性.     

Vaporizing foil actuator used for impulse forming and embossing of titanium and aluminum alloys

Electrically driven rapid vaporization of thin conductors is known to produce short-duration pressure pulses of high magnitude. This impulse can be used for applications such as high strain rate forming, shearing, collision welding, and springback calibration. Mechanical impulse was developed from aluminum foils of various thicknesses, which were vaporized using a capacitor bank discharge with a maximum charging voltage of 8.6 kV. Peak current was delivered on the order of 100 kA with rise times of about 12 μs. In this work, polyurethane was used as a medium to transfer pressure from the aluminum foil vaporization zone to the workpiece. Fundamental experiments, where AA 3003-H14 aluminum alloy was formed into perforated plates, show that for a given foil thickness, a limit existed over which supplying higher electrical energy from a given capacitor bank did not necessarily result in higher pressure. The magnitude of generated pressure was proportional to the excess Joule heat deposited into the foil before it burst. Although the polyurethane layer helped spread the pressure pulse over a larger area, the resulting pressure distribution remained heterogeneous. Practical applications, such as forming into cavities and embossing into shallow dies, were possible with this method. Sheets of 0.508 mm thick commercially pure titanium were nearly fully formed into a cellphone case die using a hybrid process that combined a quasistatic pre-forming step with a vaporizing foil forming step. Sheets of 0.508 mm thick AA 2024-T3 aluminum alloy were embossed into a die with features of varying depths. Aluminum foils with straight and curved active sections were used as actuators. The curved-section foils resulted in higher conformation of the workpiece to the die in the center region, while the straight-section foils produced better conformity to the die features on the ends.     

钛合金筋板件等温局部加载模具应力分析

等温局部加载成形技术为航空航天复杂筋板类大型整体构件的成形提供了一种新的途径,但由于构件尺寸大,其成形温度高、时间长、载荷大等工艺特点,对模具提出了更高的要求。文章针对TA15钛合金典型环形高筋薄腹特征结构件等温局部加载成形,分析了等温局部加载模具的结构特点和可能的失效形式,并在此基础上采用DEFORM 3D有限元软件,对成形时模具应力进行了研究,获得了模具载荷和应力分布规律,并进一步分析了模具凹圆角半径和锻件筋条宽度对模具应力的影响。结果表明,等温局部加载成形模具的失效形式,主要为应力集中引起的脆性断裂;加载分区边界附近模具应力较小,离分区边界越远模具应力越大,且应力峰值出现在宽度较小的环形筋型腔凹角处;模具型腔各部分材料填充能力的不一致,是导致模具应力不均匀、局部出现应力集中的主要原因;增大模具凹圆角半径,模具应力降低程度较小,而通过合理的锻件几何尺寸设计,可以改善模具型腔的充填性,能更有效地降低模具应力的不均匀性和应力峰值。文章的研究结果可为等温局部加载成形模具的设计提供参考。