CN211305549U - Clamp for cylindrical surface at bottom of blade root of vertical lathe - Google Patents

Clamp for cylindrical surface at bottom of blade root of vertical lathe Download PDF

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Publication number
CN211305549U
CN211305549U CN201921508335.9U CN201921508335U CN211305549U CN 211305549 U CN211305549 U CN 211305549U CN 201921508335 U CN201921508335 U CN 201921508335U CN 211305549 U CN211305549 U CN 211305549U
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China
Prior art keywords
base
positioning
blade root
plane
cylindrical
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Active
Application number
CN201921508335.9U
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Chinese (zh)
Inventor
安凯
张新庆
刘亚娟
齐文平
谢平
徐晓东
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Xian Shaangu Power Co Ltd
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Xian Shaangu Power Co Ltd
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Priority to CN2019213869189 priority
Application filed by Xian Shaangu Power Co Ltd filed Critical Xian Shaangu Power Co Ltd
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Abstract

The utility model discloses a cylindrical surface clamp at the bottom of a blade root of a vertical lathe, which comprises an annular base, wherein an annular boss is arranged on the upper plane of the base; a plurality of positioning blocks and pressing blocks are detachably arranged on the circumference of the base and are alternately arranged; the bottom of the positioning block is provided with an arc groove matched with the annular boss on the base; two side surfaces of the positioning block, which are positioned on the circumferential direction of the base, are inclined surfaces, so that the upper plane of the positioning block is smaller than the lower bottom plane; two sides of the pressing block, which are positioned on the circumferential direction of the base, are inclined planes, so that the upper plane of the pressing block is larger than the lower plane. The utility model discloses an annular boss has guaranteed the uniformity of locating piece and blade root mounted position on the base, for positioning unit's independent installation respectively in traditional anchor clamps, has improved positioning accuracy for the course of working is convenient for align, thereby has improved the machining precision and the processing uniformity of blade. In addition, the positioning precision is improved due to the structure of the positioning block and the pressing block, and the whole structure is more stable.

Description

Clamp for cylindrical surface at bottom of blade root of vertical lathe
Technical Field
The utility model relates to a machining anchor clamps, specifically say and are a vertical lathe blade root bottom face of cylinder anchor clamps.
Background
The blades are important parts of a blast furnace gas residual pressure turbine power generation device, are arranged on a main shaft to form a rotor, and rotate to do work when the rotor operates. The blade root of the blade is in a rhomboid shape, the small faces on the two sides of the blade root are provided with oblique teeth, the large faces on the two sides are planes, the oblique tooth faces and the large planes form a certain included angle, the bottom surface of the blade root is a cylindrical surface, the oblique tooth faces and the cylindrical surface at the bottom are concentric, and the center of the circle passes through the rotation center of the rotor. The specific vertical lathe processing mode is that the tooth surface of the blade root of a workpiece blade is horizontally positioned and placed on a fixture, the rotor is erected similarly, the blade root with the processing allowance is exposed, and the fixture is placed on a lathe workbench. When the lathe tool is used for machining, the workbench rotates to drive the workpiece blade to rotate, and the lathe tool machines the cylindrical surface at the bottom of the blade root of the workpiece blade from top to bottom. When a workpiece is positioned by a traditional clamp, each blade is placed in an independent positioning and clamping unit, and is in contact with a blade root tooth of the workpiece blade through a cylindrical pin in the positioning and clamping unit, the blade root tooth is radially positioned, a large plane of the blade root of the workpiece blade is attached to and positioned on one side surface of the positioning and clamping unit, and another large plane of the blade root of the workpiece blade is pressed tightly through a pressing block. A plurality of positioning and clamping units are uniformly arranged on the base. The traditional fixture has the defects that the cylindrical pin in the positioning and clamping unit is in point contact with the inclined teeth of the blade root of the blade to be processed, and the exposed height of the cylindrical pin is different, so that the cylindrical pin is in contact with the inclined teeth of the blade root of the workpiece at different positions, the radial positioning of the blade is influenced, and the positioning between the workpiece blade and the positioning and clamping unit is inaccurate. Meanwhile, the positioning and clamping unit is provided with a welding structure, and after long-term use, individual welding seams are stressed and cracked.
Disclosure of Invention
Not enough to above-mentioned current anchor clamps, the utility model aims to provide a vertical lathe blade root bottom face of cylinder anchor clamps, this anchor clamps positioning accuracy is high, anchor clamps that overall structure is firm.
In order to achieve the above purpose, the utility model provides a following technical scheme solves:
a clamp for the cylindrical surface at the bottom of a blade root of a vertical lathe comprises an annular base, wherein an annular boss for positioning the blade root of a blade to be machined is arranged on the upper plane of the base; a plurality of positioning blocks and a plurality of pressing blocks are detachably arranged on the circumferential direction of the base, and the positioning blocks and the pressing blocks are alternately arranged; the bottom of the positioning block is provided with an arc groove matched with the annular boss on the base, and the positioning block can slide along the annular boss; two side surfaces of the positioning block, which are positioned on the circumferential direction of the base, are inclined surfaces, so that the upper plane of the positioning block is smaller than the lower bottom plane; two sides of the pressing block, which are positioned on the circumferential direction of the base, are inclined planes, so that the upper plane of the pressing block is larger than the lower plane.
Furthermore, the upper plane of the base is provided with an annular boss according to the radial oblique line of the tooth-shaped section of the blade root.
Furthermore, the upper half part of the side surface of the annular boss close to the center of the base is a conical surface part, and the lower half part is a vertical surface part.
Furthermore, the arc groove on the bottom surface of the positioning block and the vertical surface part of the annular boss of the base form clearance fit.
Furthermore, a pin hole and a screw hole are machined in the base corresponding to each positioning block, and the distance between each pin hole and the center of the base is equal; a positioning pin penetrates through the positioning block and is inserted into a pin hole in the base, so that the positioning block is positioned in the radial direction; and a screw penetrates through the positioning block and is fixed in the screw hole on the base, so that the positioning block is fixed on the base.
Furthermore, a process hole and a process cylindrical chuck are respectively arranged on two parallel planes of the positioning block which are arranged along the radial direction of the base.
Furthermore, a through hole is formed in the pressing block, a stud penetrates through the through hole of the pressing block and is screwed into a screw hole formed in the base, and the nut is installed on the stud and presses the pressing block downwards.
Furthermore, a gasket is arranged between the nut and the positioning block.
Furthermore, the through hole on the pressing block adopts a flat hole.
Furthermore, two side surfaces of the pressing block, which are axially arranged along the base, form a certain included angle, a plane formed by the included angle between the two side surfaces is vertical to a horizontal plane, and the stud penetrates through the flat hole to be connected with the base.
The utility model has the advantages that:
1. the annular boss on the base ensures the consistency of the installation positions of the positioning block and the blade root on the base, and improves the positioning precision compared with the independent installation of the positioning units in the traditional clamp respectively, so that the alignment is convenient in the processing process, and the processing precision and the processing consistency of the blade are improved. In addition, the positioning precision is improved due to the structure of the positioning block and the pressing block, and the whole structure is more stable.
2. The conical surface part of the annular boss on the base is used for radially positioning the blade root of the workpiece blade, and meanwhile, the vertical surface part of the annular boss on the base is in clearance fit with the arc groove on the bottom surface of the positioning block to be used for radial positioning. The structure improves the clamping precision, shortens the time for clamping and aligning the blade of the workpiece, and further improves the machining precision and the machining consistency of the blade.
3. Replace the welded structure of traditional anchor clamps, guaranteed anchor clamps structural strength.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a view showing a usage state of the present invention, in which a blade to be processed is sandwiched between adjacent positioning blocks and pressing blocks;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic structural view of the base of the present invention;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
FIG. 7 is an enlarged partial view of FIG. 6;
FIG. 8 is a schematic view of the positioning of the blade of the workpiece of the fixture of the present invention;
fig. 9 is a schematic structural view of the positioning block of the present invention;
FIG. 10 is a cross-sectional view taken along line B-B of FIG. 9;
FIG. 11 is a cross-sectional view taken at C-C of FIG. 9;
FIG. 12 is a schematic structural view of a pressing block of the present invention;
FIG. 13 is a top view of FIG. 12;
reference numbers in fig. 1: 1-base, 1-1-annular boss, 2-positioning block, 3-pressing block, 4-screw, 5-stud, 6-nut, 7-washer, 8-positioning pin, 9-cylindrical surface of bottom of blade root, 10-conical surface part, 11-vertical surface part, 12-arc groove and 13-blade root.
Detailed Description
As shown in fig. 1 and 2, the present invention relates to an embodiment of a cylindrical surface clamp for the bottom of a blade root of a vertical lathe, which comprises an annular base 1, wherein an annular boss 1-1 for positioning the blade root of a blade to be processed is arranged on the upper plane of the base 1; a plurality of positioning blocks 2 and a plurality of pressing blocks 3 are detachably mounted on the circumferential direction of the base 1, and the positioning blocks 2 and the pressing blocks 3 are alternately arranged; the bottom of the positioning block 2 is provided with an arc groove 12 matched with the annular boss 1-1 on the base 1, and the positioning block 2 can slide along the annular boss 1-1; two side surfaces of the positioning block 2, which are positioned on the circumferential direction of the base 1, are inclined surfaces, so that the upper plane of the positioning block 2 is smaller than the lower bottom plane; two sides of the pressing block 3, which are positioned on the circumferential direction of the base 1, are inclined planes, so that the upper plane of the pressing block 3 is larger than the lower plane.
When the cylindrical surface clamp at the bottom of the blade root of the vertical lathe shown in the figures 1 and 2 is used for fixing a plurality of blades to be processed, the circular arc groove 12 at the bottom of the positioning block 2 is firstly clamped on the annular boss 1-1 and the positioning block 2 is fixed, and then the distances between all the positioning blocks 2 and the center of the base 1 (namely the circle center of the annular base) are ensured to be the same through the matching design of the annular boss 1-1 and the circular arc groove 12; placing the blade root of a blade to be processed between the two positioning blocks 2, exposing the bottom of the blade root towards the center, attaching a large plane on one side of the blade root to one side surface of one of the positioning blocks 2, and clamping the blade root teeth on the annular boss 1-1 to ensure the radial positioning of the blade root on the base 1; and then the pressing block 3 is arranged between the blade root and the other positioning block 2 and is pressed and fixed downwards, and at the moment, two side surfaces of the pressing block 3 are respectively and tightly attached to the blade root 13 and the side surfaces of the positioning blocks 2.
In the structure scheme, the annular boss 1-1 on the base 1 ensures the consistency of the installation positions of the positioning block 2 and the blade root 13 on the base 1, and improves the positioning precision compared with the independent installation of the positioning units in the traditional clamp, so that the alignment is convenient in the processing process, and the processing precision and the processing consistency of the blade are improved. Meanwhile, the structural design of the positioning block 2 enables the rhomboid blade root to be conveniently installed on the base, because the rhomboid blade root is inclined when being processed and placed, two side surfaces of the positioning block 2 arranged along the circumferential direction of the base 1 are inclined surfaces, the upper plane of the positioning block is smaller than the lower plane, and the large plane on one side of the blade root can be attached to the upward inclined plane of the positioning block 2; therefore, the structure of the positioning block 2 is matched with the shape of the blade root, and part of the gravity of the blade root is shared, so that the blade root is convenient to stably install, and the processing precision is ensured. In addition, two side surfaces of the pressing block 3 on the circumferential direction of the base 1 are inclined surfaces, and the upper plane surface of the pressing block is larger than the lower plane surface of the pressing block, so that the pressing block is matched with the shape of the inclined surface with the upward blade root on one hand, and on the other hand, after the pressing block 2 is pressed downwards and fixed, the pressing block can provide downward pressure for the positioning block 2 and the side surface with the upward inclined blade root, and finally the whole fixing of the parts is formed. Finally, the detachable installation of locating piece 2, briquetting 3 is for the convenience of installing the location blade, also can replace alone when certain part damages.
As shown in fig. 5, 6, 7 and 8, the upper plane of the base 1 is formed by a circular boss 1-1 according to the radial slash of the tooth-shaped section of the blade root, preferably, the upper half part of the side surface of the circular boss 1-1 close to the center of the base 1 is a conical surface part 10, and the lower half part is a vertical surface part 11; the conical surface part 10 is designed to be better attached to the helical teeth of the blade root, and the vertical surface part 11 in the annular boss 1-1 is designed to be better in clearance fit with the arc groove 12 at the bottom of the positioning block 2. In order to ensure the shape and position accuracy of the annular boss 1-1, the base 1 is machined by a numerical control lathe.
As shown in fig. 9, 10 and 11, the circular arc groove 12 on the bottom surface of the positioning block 2 is in clearance fit with the vertical surface part 11 of the annular boss 1-1 of the base 1 as a radial positioning. In order to ensure the position relation among all the surfaces of the positioning block 2, a process hole and a process cylindrical chuck are respectively arranged on two parallel planes of the positioning block 2 which are arranged along the radial direction of the base 1, the three-dimensional shape of the positioning block 2 is drawn, and the precise processing of all the surfaces of the positioning block 2 is completed at one time by adopting a one-clamping one-top clamping mode on a numerical control milling machine. In addition, in order to ensure that the positioning blocks 2 are positioned on the base 1 stably and accurately, a pin hole and a screw hole are processed on the base 1 corresponding to each positioning block 2, and all the pin holes are equal to the center of the base 1; a positioning pin 8 penetrates through the positioning block 2 and is inserted into a pin hole in the base, so that the positioning block 2 is positioned in the radial direction, and the positioning accuracy of the positioning block 2 is ensured. A screw 4 passes through the positioning block 2 and is fixed in a screw hole on the base 1, thereby fixing the positioning block 2 on the base 1.
In order to fix and compress the pressing block, a through hole is formed in the pressing block 3, a stud 4 penetrates through the through hole of the pressing block 3 and is screwed into a screw hole formed in the base 1, a nut 6 is installed on the stud 4 and presses the pressing block 2 downwards, and a gasket 7 is arranged between the nut 6 and the positioning block 2. Preferably, the through hole on the pressing block 3 is a flat hole, namely a waist-shaped hole, and the waist-shaped hole is convenient to install.
Preferably, two side surfaces of the pressing block 3, which are arranged along the axial direction of the base 1, form a certain included angle, a plane formed by the included angle between the two side surfaces is vertical to a horizontal plane, and the stud 4 passes through the flat hole to be connected with the base 1.
The utility model provides a metal material is all chooseed for use to all structures.

Claims (10)

1. The clamp for the cylindrical surface at the bottom of the blade root of the vertical lathe comprises an annular base and is characterized in that an annular boss for positioning the blade root of the blade to be machined is arranged on the upper plane of the base; a plurality of positioning blocks and a plurality of pressing blocks are detachably arranged on the circumferential direction of the base, and the positioning blocks and the pressing blocks are alternately arranged; the bottom of the positioning block is provided with an arc groove matched with the annular boss on the base, and the positioning block can slide along the annular boss; two side surfaces of the positioning block, which are positioned on the circumferential direction of the base, are inclined surfaces, so that the upper plane of the positioning block is smaller than the lower bottom plane; two sides of the pressing block, which are positioned on the circumferential direction of the base, are inclined planes, so that the upper plane of the pressing block is larger than the lower plane.
2. The fixture for the bottom cylindrical surface of the blade root of the vertical lathe as claimed in claim 1, wherein the upper plane of the base is provided with an annular boss according to the radial oblique line of the tooth-shaped section of the blade root.
3. The fixture for the cylindrical surface of the bottom of the blade root of the vertical lathe as claimed in claim 2, wherein the upper half part of the side surface of the annular boss close to the center of the base is a conical surface part, and the lower half part is a vertical surface part.
4. The fixture for the cylindrical surface of the bottom of the blade root of the vertical lathe as claimed in claim 3, wherein the arc groove on the bottom surface of the positioning block is in clearance fit with the vertical surface part of the annular boss of the base.
5. The fixture for the bottom cylindrical surface of the blade root of the vertical lathe as claimed in claim 1, wherein a pin hole and a screw hole are machined in the base corresponding to each positioning block, and all the pin holes are equidistant from the center of the base; a positioning pin penetrates through the positioning block and is inserted into a pin hole in the base, so that the positioning block is positioned in the radial direction; and a screw penetrates through the positioning block and is fixed in the screw hole on the base, so that the positioning block is fixed on the base.
6. The fixture for the cylindrical surface at the bottom of the blade root of the vertical lathe as claimed in any one of claims 1 to 5, wherein a process hole and a process cylindrical chuck are respectively arranged on two parallel planes of the positioning block which are arranged along the radial direction of the base.
7. The clamp for the cylindrical surface at the bottom of the blade root of the vertical lathe as claimed in any one of claims 1 to 5, wherein the pressing block is provided with a through hole, a screw bolt penetrates through the through hole of the pressing block and is screwed into a screw hole arranged on the base, and a nut is arranged on the screw bolt and presses the pressing block downwards.
8. The fixture for cylindrical surfaces at the bottoms of blades of a vertical lathe as claimed in claim 7, wherein a washer is disposed between the nut and the positioning block.
9. The clamp for the cylindrical surface at the bottom of the blade root of the vertical lathe blade as claimed in any one of claims 1 to 5, wherein the through hole on the pressing block is a flat hole.
10. The clamp for the cylindrical surface of the bottom of the blade root of the vertical lathe as claimed in any one of claims 1 to 5, wherein two side surfaces of the pressing block which are arranged along the axial direction of the base form a certain included angle, the plane formed by the included angle between the two side surfaces is vertical to the horizontal plane, and the stud penetrates through the flat hole to be connected with the base.
CN201921508335.9U 2019-08-23 2019-09-10 Clamp for cylindrical surface at bottom of blade root of vertical lathe Active CN211305549U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201921386918 2019-08-23
CN2019213869189 2019-08-23

Publications (1)

Publication Number Publication Date
CN211305549U true CN211305549U (en) 2020-08-21

Family

ID=72051053

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921508335.9U Active CN211305549U (en) 2019-08-23 2019-09-10 Clamp for cylindrical surface at bottom of blade root of vertical lathe

Country Status (1)

Country Link
CN (1) CN211305549U (en)

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