Auxiliary device for machining center holes of small cross shaft parts

Abstract

The utility model belongs to the field of machining, and relates to an auxiliary device for machining center holes of small cross shaft parts. The device comprises a positioning shaft, a positioning plate, three V-shaped blocks, a pressing plate, a screw, a nut and a gasket. The auxiliary device is fixed to the center of a machine tool workbench through a three-jaw chuck, and the four faces of the cross shaft are evenly measured. The three V-shaped blocks can be used for quickly positioning the part, and the pressing plate and the screws are combined for clamping the part, so that quick clamping and precise machining of the part are realized; by means of the machining auxiliary mechanism, self-centering of the part can be achieved, self-centering of the cross shaft part is achieved through the three V-shaped blocks, a center hole machined in the cross shaft part can coincide with the circle center of a circle tangent to the two walls of 90-degree V-shaped grooves of the three V-shaped blocks, and it is guaranteed that the center hole in the left-right direction of the cross shaft part is perpendicular to the center hole in the up-down direction of the cross shaft part; therefore, the machining quality of the center holes of the cross shaft parts is improved, and efficient and high-precision machining of the center holes of the small cross shaft parts is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of machining and relates to an auxiliary device for machining the center hole of a small cross shaft part. Background Technology

[0002] Small cross-shaped parts have complex structures, are forged, have many clamping positions, and require long clamping and alignment times. In addition, the large number of parts requires clamping and alignment of each one, resulting in low processing efficiency. Furthermore, the large accuracy error during alignment affects the processing accuracy and leads to poor quality.

[0003] Currently, the machining of center holes for small cross-shaped shaft parts mostly involves first marking the center lines of the cross on the end faces of the four shafts of the part, and then repeatedly clamping and aligning the center of the part using a dial indicator before machining. This process is time-consuming and results in poor perpendicularity of the cross shafts. Specifically:

[0004] 1) Aligning the center hole by scribing can easily lead to poor perpendicularity of the cross shaft of the part;

[0005] 2) Due to the small size and irregular structure of the parts, clamping the parts is difficult;

[0006] 3) The parts need to be aligned with the center while being clamped, which is time-consuming and labor-intensive.

[0007] This results in long part clamping times, and the machining accuracy is affected by the need to align the cross center line drawn on the part, leading to low machining efficiency and poor quality of the center hole machining for small cross shaft parts. Utility Model Content

[0008] To address the problems of low efficiency and poor quality in machining center holes of small cross-shaped shaft parts, this utility model provides an auxiliary device for machining center holes of such parts. It utilizes a positioning shaft, positioning plate, V-blocks, and pressure plate to construct a composite clamping structure using these components. In this device, three V-blocks position the parts, ensuring the cross-shaped shafts are perpendicular to each other. Screws and pressure plates clamp the parts, and a three-jaw chuck clamps the device. Using a horizontal machining center to machine the center hole enables rapid clamping and positioning of small cross-shaped shaft parts and efficient, high-precision machining of the center hole.

[0009] The technical solution of this utility model is as follows:

[0010] This utility model provides an auxiliary device for machining the center hole of a small cross shaft part, including a positioning shaft 1, a positioning plate 2, three V-blocks 3, a pressure plate 4, a screw 5, a nut 6, and a washer 7;

[0011] The positioning shaft 1 is a three-stage cylindrical structure with the diameter increasing from top to bottom, and the uppermost cylinder is provided with an external thread.

[0012] Positioning plate 2 is a square plate with a circular through hole in the center. Two elongated holes are symmetrically arranged above and below the circular through hole. One elongated hole is arranged to the left of the circular through hole. This elongated hole is perpendicular to the line connecting the two symmetrically arranged elongated holes.

[0013] V-block 3 is a cuboid plate with a strip plate connected to the lower end for inserting a rectangular hole. A V-groove with an included angle of 90° is opened at the upper end. The center of the circle tangent to the two walls of the 90° V-groove coincides with the center hole of the cross shaft type part.

[0014] The positioning plate 2 is assembled on the middle cylinder of the positioning shaft 1 through the central circular through hole and is pressed by the nut 6 and washer 7; the three V-blocks 3 are fixed in the long holes on the positioning plate 2 through the lower long strip plate; the cross shaft parts are fixed by the 90° grooves set on the three V-blocks 3 and are pressed by the pressure plate 4 and screws 5.

[0015] Furthermore, before use, the entire device is fixed to the center of the machine tool table by clamping the positioning shaft 1 with a three-jaw chuck. Then, the center and positioning surface of the device are aligned. During processing, the cross shaft part is placed on three V-blocks to achieve self-centering of the cross shaft part. Then, the cross shaft part is pressed by the pressure plate 4 and screws 5. Finally, the center hole of the small cross shaft part is processed.

[0016] Furthermore, the auxiliary device is fixed to the center of the machine tool table using a three-jaw chuck to achieve uniform measurement on all four sides of the cross shaft.

[0017] Furthermore, the three V-blocks can be used to quickly position the parts, and the parts can be clamped by the pressure plate and screws, so as to realize the rapid clamping and precise machining of the parts.

[0018] Furthermore, the cross shaft part is self-centered by using three V-blocks, so that the center hole machined on the cross shaft part can coincide with the center of the circle tangent to the two walls of the 90° V-groove of the three V-blocks, ensuring that the center hole in the left-right direction of the cross shaft part is perpendicular to the center hole in the up-down direction.

[0019] The beneficial effects of this utility model are:

[0020] The auxiliary device for machining the center hole of small cross shaft parts provided by this utility model can quickly clamp small cross shaft parts during machining, simplify the clamping method of the parts during machining, reduce the clamping and alignment time of the parts, and improve the machining accuracy of the parts. The parts are positioned by three V-blocks to make the cross shafts of the parts perpendicular to each other, thereby realizing the efficient and high-precision machining of the center hole of small cross shaft parts. Attached Figure Description

[0021] Figure 1 A schematic diagram of an auxiliary device for machining the center hole of a small cross-shaped part.

[0022] In the diagram: 1. Positioning shaft 2. Positioning plate 3. V-block 4. Pressure plate 5. Screw 6. Nut 7. Washer Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] like Figure 1 As shown, the auxiliary device for machining the center hole of small cross shaft parts mainly consists of a positioning shaft 1, a positioning plate 2, three V-blocks 3, a pressure plate 4, a screw 5, a nut 6, and a washer 7.

[0025] The positioning shaft 1 is a three-stage cylindrical structure with the diameter increasing from top to bottom, and the uppermost cylinder is provided with an external thread.

[0026] Positioning plate 2 is a square plate with a circular through hole in the center. Two elongated holes are symmetrically arranged above and below the circular through hole. An elongated hole is arranged to the left of the circular through hole. The elongated hole is perpendicular to the line connecting the two symmetrically arranged elongated holes.

[0027] V-block 3 is a cuboid plate with a strip plate connected to the lower end for inserting a rectangular hole. The upper end has a V-groove with an included angle of 90°. The center of the circle tangent to the two walls of the 90° V-groove coincides with the center hole of the cross shaft type part.

[0028] The positioning plate 2 is assembled onto the central cylinder of the positioning shaft 1 through the central circular through hole and is tightened by the nut 6 and washer 7. Three V-blocks 3 are fixed in the elongated holes on the positioning plate 2 through the lower elongated plates; cross shaft parts are fixed by the 90° grooves provided on the three V-blocks 3 and are tightened by the pressure plate 4 and screws 5.

[0029] Before use, the entire device is fixed to the center of the machine tool table by clamping the positioning shaft 1 with a three-jaw chuck. Then, the center and positioning surface of the device are aligned. During processing, the cross shaft part is placed on three V-blocks to achieve self-centering of the cross shaft part. Then, the cross shaft part is pressed by the pressure plate 4 and screws 5. Finally, the center hole of the small cross shaft part is processed.

[0030] This invention utilizes a three-jaw chuck to fix the auxiliary device on the center of the machine tool table, achieving uniform machining on all four sides of the cross shaft. Three V-blocks enable rapid part positioning, and the combination of a pressure plate and screws clamps the part, enabling rapid clamping and precise machining. This machining auxiliary mechanism allows for part self-centering. The three V-blocks enable the cross shaft part to self-center, ensuring that the center hole machined on the cross shaft part coincides with the center of the circle tangent to the two walls of the 90° V-groove of the three V-blocks. This guarantees that the center hole in the left-right direction is perpendicular to the center hole in the up-down direction, thereby improving the machining quality of the center hole in the cross shaft part.

Claims

1. An auxiliary device for machining the center hole of a small cross-shaped part, characterized in that, Includes positioning shaft (1), positioning plate (2), 3 V-blocks (3), pressure plate (4), screw (5), nut (6), and washer (7); The positioning shaft (1) is a three-stage cylindrical structure with the diameter increasing from top to bottom, and the uppermost cylinder is provided with an external thread; The positioning plate (2) is a square plate with a circular through hole in the center. Two long holes are symmetrically arranged above and below the circular through hole. A long hole is arranged on the left side of the circular through hole. The long hole is perpendicular to the line connecting the two long holes symmetrically arranged above and below. V-block (3) is a cuboid plate with a strip plate connected to the lower end for inserting a rectangular hole. A V-groove with an included angle of 90° is opened at the upper end. The center of the circle tangent to the two walls of the 90° V-groove coincides with the center hole of the cross shaft type part. The positioning plate (2) is assembled on the middle cylinder of the positioning shaft (1) through the central circular through hole and is pressed by the nut (6) and washer (7); the three V-blocks (3) are fixed in the long holes on the positioning plate (2) through the lower long strip plate; the cross shaft parts are fixed by the 90° grooves set on the three V-blocks (3) and pressed by the pressure plate (4) and screw (5).

2. The auxiliary device for machining the center hole of a small cross-shaped part as described in claim 1, characterized in that, The auxiliary device is fixed on the center of the machine tool table using a three-jaw chuck to achieve uniform measurement on all four sides of the cross shaft.

3. The auxiliary device for machining the center hole of a small cross-shaped part as described in claim 1, characterized in that, Three V-blocks can be used to quickly position the parts, and the parts can be clamped by pressure plates and screws, so as to achieve rapid clamping and precise machining of the parts.

4. The auxiliary device for machining the center hole of a small cross-shaped part as described in claim 1, characterized in that, Three V-blocks are used to self-center the cross shaft part, so that the center hole machined on the cross shaft part can coincide with the center of the circle tangent to the two walls of the 90° V-groove of the three V-blocks, ensuring that the center hole in the left-right direction of the cross shaft part is perpendicular to the center hole in the up-down direction.

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