JPH0636732U - Spindle head support device for machine tools - Google Patents

Abstract

(57) [Abstract] [Purpose] An object is to provide a spindle head support device in a portal machine tool with improved support rigidity. [Structure] In a supporting device 10 in which a head carrier 6 moves on a sliding surface of a horizontal body 5 mounted on the top of a gate-shaped structure and which supports a spindle head 4 which can be raised and lowered in the head carrier, The left and right main sliding surfaces 11 and 12 for supporting the weight of the spindle head are provided on the lower side of the rack body, and the left and right auxiliary sliding surfaces 13 and 14 for supporting the tilt of the spindle head are provided on the upper side of the horizontal body. It is a support device for the spindle head.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support device for a spindle head in a machine tool, which has improved support rigidity.

[0002]

[Prior art and problems]

 Conventionally, the cantilever support method is not used to support the spindle head because the spindle head support device of a gate type machine tool called a precision jig boring machine is required to have high mechanical rigidity. Particularly, the head carrier moves on the sliding surface of the horizontal body mounted on the top of the double column gate type structure, and the spindle head that can be raised and lowered is supported by the supporting device in this head carrier. Generally, it is a two-point support system with left and right sliding surfaces. For this reason, if the spindle head is subjected to a large lateral cutting force, it will bend easily and high-precision machining cannot be guaranteed.

[0003]

[Problems and objectives to be solved by the device]

 An object of the present invention is to solve the above-mentioned conventional problems, and an object thereof is to provide a support device for a spindle head in a portal machine tool with improved support rigidity.

[0004]

[Means for Solving the Problems]

 The concrete means of the present invention is to provide a support device in which a head carrier moves on a sliding surface of a horizontal body mounted on the top of a double column gate type structure and a vertically movable spindle head is supported in the head carrier. The left and right main sliding surfaces that support the weight of the spindle head are provided below the horizontal body, and the left and right auxiliary sliding surfaces that support the tilt of the spindle head are provided above the horizontal body. It is a spindle head support device in a characteristic machine tool.

[0005]

[Action]

 According to the present invention, the left and right main sliding surfaces for supporting the weight of the spindle head are provided below the horizontal body, and the left and right auxiliary sliding surfaces for supporting the tilt of the spindle head are provided on the upper side of the horizontal body. Therefore, even if the spindle head is subjected to a large lateral cutting force, it does not easily bend, ensuring high-precision machining. That is, since the lower end side of the spindle head that receives a large cutting pressure from the work is supported by the main sliding surface that supports the spindle head, the spindle head can bend even if it receives a large cutting pressure in the lateral direction. There is no.

[0006]

【Example】

 Hereinafter, an example shown in the drawings will be described. FIG. 1 is a perspective view of a spindle head supporting device in a machine tool according to the present invention, and FIG. 2 is an enlarged sectional view of a main part according to the present invention.

In FIG. 1, reference numeral 10 denotes a spindle head supporting device according to the present invention, and a spindle head 4 is attached to a top portion 3A of a column 3 that stands upright at four corners of a base of a machine tool 1 ... This is a portal machine tool 1 in which a frame main body 5 is installed, and a head carrier 6 that slides left and right or front and back is provided in the center of the main body 5 and a spindle head 4 that moves up and down inside the head carrier 6.

The left and right main sliding surfaces 11 and 12 for supporting the weight of the spindle head 4 are provided on the lower side of the horizontal body 5, and the upper side of the horizontal body 5 has a main sliding surface 11 and 12. Two left and right sub-sliding surfaces 13 and 14 that support the fall are provided. The lower sliding surfaces 6A and 6A of the head carrier 6 engage with the main sliding surfaces 11 and 12, and the upper sliding surfaces 6B and 6B of the head carrier 6 engage with the sub sliding surfaces 13 and 14. The head carrier 6 is supported by four upper and lower sliding surfaces. The sliding surfaces 11, 12, 13, 14 are equipped with adjusting plates 15, 16, 17, 18 and screws for adjusting the engagement pressure.

The left and right main sliding surfaces 11 and 12 for supporting the weight of the spindle head 4 are provided below the horizontal body 5, and the left and right auxiliary slides for supporting the tilt of the spindle head 4 are provided on the upper side of the horizontal body 5. Since the moving surfaces 13 and 14 are provided, even if the spindle head 4 receives a large lateral cutting force F, it does not easily bend, and high precision machining is guaranteed. That is, since the lower end side of the spindle head 4 at a distance L close to the cutter C that receives a large cutting pressure F from the work W is supported by the main sliding surfaces 11 and 12 that support the spindle head 4, the spindle head is Even if it receives a large twisting moment in the lateral direction, it does not flex in response to this moment.

It is needless to say that the present invention is not limited to the above-mentioned respective embodiments, and design changes can be made within the scope of the invention.

[0011]

【effect】

 According to the present invention, the left and right main sliding surfaces that support the weight of the spindle head are provided below the horizontal body, and the left and right auxiliary sliding surfaces that support the tilt of the spindle head are provided above the horizontal body. Therefore, even if the spindle head is subjected to a large lateral cutting force, it does not easily bend, ensuring high-precision machining. That is, since the lower end side of the spindle head that receives a large cutting pressure from the work is supported by the main sliding surface that supports the spindle head, the supporting rigidity is high even if the spindle head receives a large cutting pressure in the lateral direction. It has the effect of improving and less bending.

[Brief description of drawings]

FIG. 1 is a perspective view of a spindle head support device in a machine tool according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part according to the present invention.

[Explanation of symbols]

 1 Machine tool 2 Base 3 Column 3A Top 4 Spindle head 5 Horizontal body 6 Head carrier 6A Lower end sliding surface 6B Upper end sliding surface 11,12 Main sliding surface 13,14 Sub sliding surface

Claims (1)

[Scope of utility model registration request] 1. A support device in which a head carrier moves on a sliding surface of a horizontal body mounted on the top of a double column gate type structure and supports a spindle head that can move up and down in the head carrier. Work that features left and right main sliding surfaces that support the weight of the spindle head on the underside of the rack body, and left and right sub-sliding surfaces that support the tilt of the spindle head on the upper side of the traverse body Support device for spindle heads in machines.