JP2562998Y2 - Constant temperature platen - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant temperature platen, and more particularly, to a constant temperature platen for setting a processing member for precision equipment to a constant temperature in a short time to enhance dimensional measurement accuracy.

[0002]

2. Description of the Related Art Generally, when processing components for precision equipment, the temperature at the time of measurement for measuring the processing accuracy is regulated by international standards.
In the case of 20 ° C. , for example, at 20 ° C.
And so on. This is because the member is thermally affected by the difference in temperature at the place where the temperature is measured, causing a dimensional error. Therefore, when high accuracy is required, when the measured object has a temperature higher or lower than 20 ° C specified by the processing heat, room temperature, etc., match the measured object with the specified temperature of 20 ° C. You must measure it after you let it. Therefore, the measurement is performed after the object to be measured is left in the constant temperature room at the specified temperature by the air conditioner for a certain period of time so that the object to be measured matches the specified temperature. In addition, surface plate
Is a tool that provides a flat surface to the workpiece
It is .

[0003]

The constant temperature room with the air-conditioning equipment has a drawback that it requires a large investment in the equipment and cannot be installed by small and medium-sized enterprises. In addition, since it takes more than one day or more to match the set temperature by placing the DUT in the constant temperature room, time is lost, and the air conditioning equipment must be operated for a long time. And there is a disadvantage that operating costs are high.
The present invention has been developed in view of the above circumstances in order to provide a constant temperature surface plate capable of setting an object to be measured to a constant temperature in a short time.

[0004]

According to the present invention, the following means are taken in order to solve the above problems and achieve the object.

[0005] gantry and disposed on a metal plate bottom surface having excellent thermal conductivity, as well as closely fix the electronic cooler with a built-in thermo-module to the lower surface the metal plate, embedded temperature sensor in the metal plate in the lower The temperature sensor and the electronic cooler are electrically connected to a temperature controller, and the temperature controller has a function of setting and adjusting the output temperature of the electronic cooler, and a function of setting the output temperature of the electronic cooler in accordance with the input of the temperature detection value by the temperature sensor. It consists of a constant temperature platen with a function of automatically adjusting the temperature.

A plurality of the electronic coolers are provided, and the temperature controller can automatically and individually control the temperature of the plurality of electronic coolers.

[0007] The metal plate is a ground plate (Surfa
ce Plate).

[0008]

The present invention constructed as described above has the following functions. Operating the electronic cooler and a temperature setting at a temperature regulator, for removing heat of the metal surface plate thermo module has a heat dissipation effect, the metal plate is cooled. metal
If the surface plate is small, the metal surface plate is cooled to the set temperature only by setting the temperature of the temperature controller. If the metal platen is large, the temperature sensor embedded in it measures the temperature of the metal platen and sends the measured value as an electric signal to the temperature controller, and if the set temperature matches the detected temperature of the temperature sensor, The cooling is automatically stopped, and when the temperature rises, the cooling operation is automatically started. If the temperature of the room temperature, the metal platen , or the object to be measured is lower than the set temperature in winter or the like, heating must be performed.In this case, the cooling function and heating function are reversed by switching the current of the thermo module, and the metal The surface plate is heated to raise the temperature of the object to be measured to the set temperature. If it thereby placing the object to be cooled (the metal workpiece) on the metal plate,
The object to be cooled is cooled or heated to a set temperature (for example, 20 ° C.). Therefore, when the dimensions of the workpiece at this constant temperature are determined, no dimensional error occurs.

[0009]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the constant temperature table 1, and FIG. 2 is a plan view. The constant temperature platen 1 is provided with mounts 3.3 at four lower corners of a metal platen (for example, copper, aluminum, iron) 2 having excellent thermal conductivity.
... is fixed. The metal platen 2 is, for example, 40 cm on a side.
The surface plate is made of copper with a square shape and a thickness of about 8 cm, and the top surface is precisely smoothed.
e) is formed. Reference numeral 3A in the figure is a heat insulating material.
On the lower surface of the metal platen 2, four electronic coolers 4.4 in the figure are closely fixed. The electronic cooler 4 ...
A cooling surface of a thermo module 4B composed of an electronic cooling element is joined to a cooling plate 4A made of metal, a radiating fin 4C is joined to the radiating surface, and a radiating fan 4D is arranged on the fin 4C and integrated. The cooling plate 4A is closely fixed to the metal surface plate 2 by 4E and 4E. Also metal
On the lower surface of the platen 2, a hole-shaped temperature detecting section 2A
Are formed and a temperature sensor 5 (for example, a beat type thermistor) is provided. The temperature sensor 5 and the electronic cooler 4
Are electrically connected to the temperature controller 7 through cords 6.6. The temperature controller 7 has an input section 7A. 7A
, And a digital display section 7B are provided.
The temperature is set to, for example, 20 ° C. while watching the set temperature displayed on the display unit 7B by the manual operation of A. A connector for outputting power so as to bring the thermo module to a set temperature is built in, and has a function of adjusting the power output in accordance with a temperature detection value input from the temperature sensor 5. In the above configuration, when the input unit 7A of the temperature controller 7 is set to a constant temperature of 20 ° C., a numerical value of 20 is digitally displayed on the display unit 7B, and the current temperature detected by the temperature sensor 5 is displayed. Is done. Next, the thermo module 4B
Starts the electron action, cools the cooling section, and starts radiating heat from the heat radiating section. The radiated heat is conducted to the heat fins 4C, and is efficiently radiated by the rotation of the radiating fan 4D. When the cooling plate 4A is cooled by the thermo module 4B, the heat of the metal plate 2 is taken away by this, and the metal plate 2 is gradually cooled. The metal platen 2 is cooled down with the lapse of time to 20 ° C.
, The temperature sensor 5 measures the temperature and inputs the measured temperature value to the temperature controller 7, that is, if the temperature sensor 5 is a thermistor, the voltage change value accompanying the temperature change is input to the temperature controller 7. If there is a temperature measurement input of 20 ° C,
The temperature controller 7 automatically stops cooling. in this case,
If the temperature sensor 5 on one side of the metal platen 2 has not yet sent the temperature detection value input signal of 20 ° C., the electronic cooler 4 linked thereto should be individually controlled so as not to stop the cooling operation. Can be. That is, if there is a temperature difference on the surface of the constant temperature platen 1 due to the positional relationship where the constant temperature platen 1 is placed, control is performed so that the platen surface has an average temperature. In particular, the constant temperature setting is required to be 20 ° C ± 1 ° C, and the precision is required to be up to 0.5 ° C, so the difference on the board surface must be as strict as 0.1 ° C. Things.
Therefore, if a workpiece for equipment as an object to be cooled is placed on the upper surface of the metal platen 2, a small object can be cooled to 20 ° C. in about 20 minutes.
The metal platen 2 can be cooled to a constant temperature of
In the case of a surface plate, a flat surface can be measured on the spot and a dimension can be measured. It is also possible to set a block gauge or a micrometer. In this way this invention, since the small and inexpensive constant temperature plate, can be easily purchased in small business, Heng
Even without a greenhouse , accurate constant temperature measurement of a workpiece can be performed in a short time.

The present invention is not limited to the above embodiment. For example, the electronic cooler 4 can be embedded in a metal surface plate , and the temperature controller can be integrated with the gantry. Further, the heat insulating hood can be freely opened and closed or detachably provided so as to surround the metal platen . Of course, casters can be arranged under the gantry for easy transportation.

[0011]

[Effects of the Invention] As described above, this invention has the following excellent effects.

A. Since it is small and inexpensive, and the temperature of the object to be cooled can be accurately set to a constant temperature in a short time, it can be easily purchased even by small and medium-sized companies, and the processing accuracy of the workpiece can be improved.

B. Although the damage caused by cancellation of the delivered work due to the dimensional accuracy is large for both the ordering party and the order receiving party, the use of this product enables the constant temperature measurement to be performed frequently, which is effective in improving the quality.

C. Since the power consumption is extremely small and the operation can be achieved in a short time, the maintenance management cost is small and the processing cost is not burdened.

[Brief description of the drawings]

FIG. 1 is a front view of a constant temperature table.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Constant temperature surface plate 2 Metal surface plate 2A Temperature detection part 3 Stand 3A Heat insulation material 4 Electronic cooler 4A Cooling plate 4B Thermo module 4C Radiation fin 4D Radiation fan 4E Screw 5 Temperature sensor 6 Code 7 Temperature controller 7A Input part 7B Display part

Claims (2)

(57) [Scope of request for utility model registration] 1. A gantry is provided below a metal platen having excellent thermal conductivity, and a thermo module is fixed to a lower surface of a cooling plate.
An electronic cooler integrated with a heat radiation fin fixed below it
A cooling plate is closely fixed to the lower surface of the metal platen, and a temperature sensor is buried in the lower portion of the metal platen. The temperature sensor and the electronic cooler are electrically connected to a temperature controller, and the temperature controller is an electronic cooler. A constant temperature platen having a function of setting and adjusting the output temperature of the electronic cooler and a function of automatically adjusting the output temperature of the electronic cooler to the set temperature in accordance with the input of a measured value from a temperature sensor. 2. The metal platen is a ground platen (Su).
2. The constant temperature platen according to claim 1, wherein the platen is a temperature plate.