CN111397638A - 一种电动机测速用编码器码盘制备工艺 - Google Patents

一种电动机测速用编码器码盘制备工艺 Download PDF

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CN111397638A
CN111397638A CN202010267278.0A CN202010267278A CN111397638A CN 111397638 A CN111397638 A CN 111397638A CN 202010267278 A CN202010267278 A CN 202010267278A CN 111397638 A CN111397638 A CN 111397638A
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牟前金
谢萍
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Abstract

本发明是一种电动机测速用编码器码盘制备工艺,其步骤包括:烧结铁氧体、注塑橡胶、充磁和组装。本发明注塑塑胶圆环与烧结铁氧体组合,软硬相结合,解决了码盘没有张力及弹性的问题;本发明通过烧结铁氧体制造外磁环和内磁环,成本低,磁性高,温漂小。此外,外磁环和内磁环上所充磁的磁极数可以根据工作需要进行改变,例如,对控制要求精度高的电动机,可以增加外磁环和内磁环所充磁的磁极个数,磁极数越多,精确度越高。

Description

一种电动机测速用编码器码盘制备工艺
技术领域
本发明涉及电动机编码器技术领域,尤其涉及一种电动机测速用编码器码盘制备工艺。
背景技术
编码器(encoder)是将信号(如比特流)或数据进行编制、转换为可用以通讯、传输和存储的信号形式的设备。编码器把角位移或直线位移转换成电信号,前者称为码盘,后者称为码尺。在电动机编码器技术领域,经常用铷或注塑来制造编码器码盘,然而因为铷和注塑磁温漂大,注塑磁磁性弱造成高温信号丢失,并制造成本高,此外,铷和注塑磁制造出来的码盘没有张力,容易在使用时受到损坏。
发明内容
本发明旨在解决现有技术的不足,而提供一种电动机测速用编码器码盘制备工艺。
本发明为实现上述目的,采用以下技术方案:一种电动机测速用编码器码盘制备工艺,其步骤包括:
(1)烧结铁氧体
烧结铁氧体的原材料换算成各个氧化物时按重量由下述组分组成:
Figure BDA0002441753500000011
Figure BDA0002441753500000021
将以上原材料进行粉碎,粉碎后的颗粒直径大小为0.85-4μm,粉碎后进行混合,制得原材料混合粉,将混合粉挤压到环形模具里,在加热炉内烧成而得到环形烧结铁氧体,环形烧结铁氧体有两种规格,一种规格的直径较大,称为外磁环,另一种规格的直径相对较小,称为内磁环,外磁环用于产生Z轴方向上的磁信号,内磁环用于产生X/Y轴方向上的磁信号;
(2)注塑橡胶
通过橡胶注塑工艺,制造橡胶圆环,橡胶圆环的内径与内磁环的外径相等,橡胶圆环的外径与外磁环的内径相等
(3)充磁
根据需求对外磁环和内磁环进行充磁;
(4)组装
将外磁环、橡胶圆环和内磁环连接在一起而形成一个整体产品,即编码器码盘。
步骤(1)中,加热炉将烧成温度保持在1300-1330℃,在加热炉内烧成而得到烧结铁氧体的主烧成工序,从该保持温度开始降温的时候连续或阶段性地减少加热炉内的氧浓度。
步骤(1)中,外磁环和内磁环均为异方性磁体。
步骤(3)中,外磁环所充磁的极数为72,内磁环所充磁的极数为18。
步骤(4)中,外磁环、橡胶圆环和内磁环通过粘接剂连接在一起,或外磁环、橡胶圆环和内磁环通过卡接连接在一起。
本发明的有益效果:本发明注塑塑胶圆环与烧结铁氧体组合,软硬相结合,解决了码盘没有张力及弹性的问题;本发明通过烧结铁氧体制造外磁环和内磁环,成本低,磁性高,温漂小。此外,外磁环和内磁环上所充磁的磁极数可以根据工作需要进行改变,例如,对控制要求精度高的电动机,可以增加外磁环和内磁环所充磁的磁极个数,磁极数越多,精确度越高。
具体实施方式
下面结合具体实施例对本发明作进一步说明:
一种电动机测速用编码器码盘制备工艺,其步骤包括:
(1)烧结铁氧体
烧结铁氧体的原材料换算成各个氧化物时按重量由下述组分组成:
Figure BDA0002441753500000031
将以上原材料进行粉碎,粉碎后的颗粒直径大小为0.85-4μm,粉碎后进行混合,制得原材料混合粉,将混合粉挤压到环形模具里,在加热炉内烧成而得到环形烧结铁氧体,环形烧结铁氧体有两种规格,一种规格的直径较大,称为外磁环,另一种规格的直径相对较小,称为内磁环,外磁环用于产生Z轴方向上的磁信号,内磁环用于产生X/Y轴方向上的磁信号;
(2)注塑橡胶
通过橡胶注塑工艺,制造橡胶圆环,橡胶圆环的内径与内磁环的外径相等,橡胶圆环的外径与外磁环的内径相等
(3)充磁
根据需求对外磁环和内磁环进行充磁;
(4)组装
将外磁环、橡胶圆环和内磁环连接在一起而形成一个整体产品,即编码器码盘。
步骤(1)中,加热炉将烧成温度保持在1300-1330℃,在加热炉内烧成而得到烧结铁氧体的主烧成工序,从该保持温度开始降温的时候连续或阶段性地减少加热炉内的氧浓度。
步骤(1)中,外磁环和内磁环均为异方性磁体。
步骤(3)中,外磁环所充磁的极数为72,内磁环所充磁的极数为18。
步骤(4)中,外磁环、橡胶圆环和内磁环通过粘接剂连接在一起,或外磁环、橡胶圆环和内磁环通过卡接连接在一起。
实施例1:
一种电动机测速用编码器码盘制备工艺,其步骤包括:
(1)烧结铁氧体
烧结铁氧体的原材料换算成各个氧化物时按重量由下述组分组成:
Figure BDA0002441753500000041
Figure BDA0002441753500000051
将以上原材料进行粉碎,粉碎后的颗粒直径大小为0.85μm,粉碎后进行混合,制得原材料混合粉,将混合粉挤压到环形模具里,在加热炉内烧成而得到环形烧结铁氧体,环形烧结铁氧体有两种规格,一种规格的直径较大,称为外磁环,另一种规格的直径相对较小,称为内磁环,外磁环用于产生Z轴方向上的磁信号,内磁环用于产生X/Y轴方向上的磁信号;
(2)注塑橡胶
通过橡胶注塑工艺,制造橡胶圆环,橡胶圆环的内径与内磁环的外径相等,橡胶圆环的外径与外磁环的内径相等
(3)充磁
根据需求对外磁环和内磁环进行充磁;
(4)组装
将外磁环、橡胶圆环和内磁环连接在一起而形成一个整体产品,即编码器码盘。
步骤(1)中,加热炉将烧成温度保持在1300℃,在加热炉内烧成而得到烧结铁氧体的主烧成工序,从该保持温度开始降温的时候连续或阶段性地减少加热炉内的氧浓度。
步骤(1)中,外磁环和内磁环均为异方性磁体。
步骤(3)中,外磁环所充磁的极数为72,内磁环所充磁的极数为18。
步骤(4)中,外磁环、橡胶圆环和内磁环通过粘接剂连接在一起,或外磁环、橡胶圆环和内磁环通过卡接连接在一起。
实施例2:
一种电动机测速用编码器码盘制备工艺,其步骤包括:
(1)烧结铁氧体
烧结铁氧体的原材料换算成各个氧化物时按重量由下述组分组成:
Figure BDA0002441753500000061
将以上原材料进行粉碎,粉碎后的颗粒直径大小为4μm,粉碎后进行混合,制得原材料混合粉,将混合粉挤压到环形模具里,在加热炉内烧成而得到环形烧结铁氧体,环形烧结铁氧体有两种规格,一种规格的直径较大,称为外磁环,另一种规格的直径相对较小,称为内磁环,外磁环用于产生Z轴方向上的磁信号,内磁环用于产生X/Y轴方向上的磁信号;
(2)注塑橡胶
通过橡胶注塑工艺,制造橡胶圆环,橡胶圆环的内径与内磁环的外径相等,橡胶圆环的外径与外磁环的内径相等
(3)充磁
根据需求对外磁环和内磁环进行充磁;
(4)组装
将外磁环、橡胶圆环和内磁环连接在一起而形成一个整体产品,即编码器码盘。
步骤(1)中,加热炉将烧成温度保持在1330℃,在加热炉内烧成而得到烧结铁氧体的主烧成工序,从该保持温度开始降温的时候连续或阶段性地减少加热炉内的氧浓度。
步骤(1)中,外磁环和内磁环均为异方性磁体。
步骤(3)中,外磁环所充磁的极数为72,内磁环所充磁的极数为18。
步骤(4)中,外磁环、橡胶圆环和内磁环通过粘接剂连接在一起,或外磁环、橡胶圆环和内磁环通过卡接连接在一起。
实施例3:
一种电动机测速用编码器码盘制备工艺,其步骤包括:
(1)烧结铁氧体
烧结铁氧体的原材料换算成各个氧化物时按重量由下述组分组成:
Figure BDA0002441753500000071
将以上原材料进行粉碎,粉碎后的颗粒直径大小为2μm,粉碎后进行混合,制得原材料混合粉,将混合粉挤压到环形模具里,在加热炉内烧成而得到环形烧结铁氧体,环形烧结铁氧体有两种规格,一种规格的直径较大,称为外磁环,另一种规格的直径相对较小,称为内磁环,外磁环用于产生Z轴方向上的磁信号,内磁环用于产生X/Y轴方向上的磁信号;
(2)注塑橡胶
通过橡胶注塑工艺,制造橡胶圆环,橡胶圆环的内径与内磁环的外径相等,橡胶圆环的外径与外磁环的内径相等
(3)充磁
根据需求对外磁环和内磁环进行充磁;
(4)组装
将外磁环、橡胶圆环和内磁环连接在一起而形成一个整体产品,即编码器码盘。
步骤(1)中,加热炉将烧成温度保持在1310℃,在加热炉内烧成而得到烧结铁氧体的主烧成工序,从该保持温度开始降温的时候连续或阶段性地减少加热炉内的氧浓度。
步骤(1)中,外磁环和内磁环均为异方性磁体。
步骤(3)中,外磁环所充磁的极数为72,内磁环所充磁的极数为18。
步骤(4)中,外磁环、橡胶圆环和内磁环通过粘接剂连接在一起,或外磁环、橡胶圆环和内磁环通过卡接连接在一起。
上面结合具体实施例对本发明进行了示例性描述,显然本发明具体实现并不受上述方式的限制,只要采用了本发明的方法构思和技术方案进行的各种改进,或未经改进直接应用于其它场合的,均在本发明的保护范围之内。

Claims (5)

1.一种电动机测速用编码器码盘制备工艺,其特征在于,其步骤包括:
(1)烧结铁氧体
烧结铁氧体的原材料换算成各个氧化物时按重量由下述组分组成:
Figure FDA0002441753490000011
将以上原材料进行粉碎,粉碎后的颗粒直径大小为0.85-4μm,粉碎后进行混合,制得原材料混合粉,将混合粉挤压到环形模具里,在加热炉内烧成而得到环形烧结铁氧体,环形烧结铁氧体有两种规格,一种规格的直径较大,称为外磁环,另一种规格的直径相对较小,称为内磁环,外磁环用于产生Z轴方向上的磁信号,内磁环用于产生X/Y轴方向上的磁信号;
(2)注塑橡胶
通过橡胶注塑工艺,制造橡胶圆环,橡胶圆环的内径与内磁环的外径相等,橡胶圆环的外径与外磁环的内径相等
(3)充磁
根据需求对外磁环和内磁环进行充磁;
(4)组装
将外磁环、橡胶圆环和内磁环连接在一起而形成一个整体产品,即编码器码盘。
2.根据权利要求1所述的电动机测速用编码器码盘制备工艺,其特征在于,步骤(1)中,加热炉将烧成温度保持在1300-1330℃,在加热炉内烧成而得到烧结铁氧体的主烧成工序,从该保持温度开始降温的时候连续或阶段性地减少加热炉内的氧浓度。
3.根据权利要求1所述的电动机测速用编码器码盘制备工艺,其特征在于,步骤(1)中,外磁环和内磁环均为异方性磁体。
4.根据权利要求1所述的电动机测速用编码器码盘制备工艺,其特征在于,步骤(3)中,外磁环所充磁的极数为72,内磁环所充磁的极数为18。
5.根据权利要求1所述的电动机测速用编码器码盘制备工艺,其特征在于,步骤(4)中,外磁环、橡胶圆环和内磁环通过粘接剂连接在一起,或外磁环、橡胶圆环和内磁环通过卡接连接在一起。
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CN102472607A (zh) * 2009-06-30 2012-05-23 Ntn株式会社 汽车驱动用电动机的旋转角度检测装置和安装有该旋转角度检测装置的轴承
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