CN102528470B - Double-sided right-angle milling head - Google Patents

Abstract

The invention relates to a machine tool accessory, especially a double-sided right-angle milling head, which includes a first bevel gear (31), a middle steering device (34), a main shaft (7), a front support device (33), and a rear support device (35), right-angle milling head casing (1), front-end pressing device (30), rear-end pressing device (37). The present invention can complete the milling process of two parallel planes or multiple parallel planes under the condition of one-time positioning of the main shaft (7), reduces the adjustment operation of the right-angle milling head during machining, has a simple, compact and reasonable structure, and can significantly improve production efficiency.

Description

A double-sided right-angle milling head

technical field

The invention relates to a machine tool accessory, in particular to a right-angle milling head which can be used for double-sided processing.

Background technique

With the rapid development of my country's machinery industry, especially the development of heavy industry, there is an increasing demand for high-precision metal processing equipment such as pentahedron gantry machining centers in the market. Pentahedron gantry machining centers are based on gantry machining centers. A developed multifunctional CNC machine tool can realize multi-faceted machining of large mechanical parts by replacing various additional cutting heads. Usually, all or most of the processing procedures of large mechanical parts can be completed in one clamping, thus greatly improving It can greatly improve the production efficiency, which can improve the work efficiency by more than 3 times compared with the general gantry machining center. At the same time, because multiple clamping is avoided, errors caused by multiple clamping are eliminated, which is beneficial to improving and ensuring machining accuracy. As one of the additional cutting heads, the right-angle milling head can be used to complete four-sided processing at right angles to the direction of the machine tool spindle, and is widely used in daily processing.

The ordinary right-angle milling head used in daily processing needs to complete the machining of the four sides of the workpiece by rotating the milling head spindle in four 90-degree directions. The ordinary right-angle milling head generally uses manual operations such as clamping and direction rotation. Compared with the right-angle milling head with automatic clamping and automatic steering, although the manual operation of the right-angle milling head affects the processing efficiency, due to its large joint surface, Strong bearing capacity, suitable for strong cutting. When clamping milling cutters and other powerful cutting tools, because the installation accuracy is not high, usually the milling cutters can be directly connected to the end face of the spindle through screws, and there is no need to use the spindle taper shank for positioning and square keys to transfer cutting. Torque etc. to install. At this time, when using a common right-angle milling head to complete the four-sided machining, since the milling cutter can only be installed on the end face of the main shaft, the processing operator needs to change the direction of the main shaft in the right-angle milling head many times, which affects the processing efficiency; at the same time, due to the two parallel machining The position accuracy of the surface is affected by the positioning accuracy after the spindle of the right-angle milling head rotates, and this method is not conducive to the guarantee of the position accuracy of the parallel processing surface. Chinese patent document (Patent No. 200710044008.8) discloses a bevel gear right-angle milling head. By changing the direction of rotation of the milling cutter, the inner surface such as a hole or the end surface parallel to the spindle of the milling machine can be machined. It is impossible to complete double-sided machining, that is, to complete the milling of two parallel planes or multiple parallel planes in the case of one spindle positioning.

Contents of the invention

The purpose of a double-sided right-angle milling head of the present invention is to overcome the above disadvantages, thereby providing a reasonable right-angle milling head that can be used for double-sided processing. In the powerful milling process, the number of rotations of the right-angle milling head spindle can be reduced, which is beneficial to the improvement of processing efficiency; at the same time, because the milling process of two parallel planes or multiple parallel planes is completed in the case of one spindle positioning, it is beneficial Guaranteed positional accuracy between parallel planes.

In order to achieve the purpose of the above invention, the technical solution of the present invention is as follows: a double-sided right-angle milling head, including a first bevel gear, a middle steering device, a main shaft, a front-end support device, a rear-end support device, a milling head box, and a front-end pressing device , Back-end pressing device. The middle steering device includes a second bevel gear meshed with the first bevel gear, a second flat key, a first spacer, a second spacer and a first lock nut, and the second bevel gear passes through the second flat key Connected to the main shaft, set on the main shaft, the first spacer and the second spacer are respectively located on the left and right sides of the second bevel gear, and the first lock nut on the left side of the first spacer can be adjusted to move the first spacer , The second bevel gear and the second spacer are on the shoulder of the main shaft; in the middle of the main shaft, there are two key slots, and two second flat keys are installed, and the second bevel gear is installed on the main shaft through the second flat key On the second bevel gear and the middle step of the main shaft, a second spacer is installed, and the left side of the second bevel gear is arranged with a first spacer, which is locked by the first lock nut installed on the main shaft. The second bevel gear meshes with another first bevel gear that transmits the output torque of the main shaft, thereby transmitting the cutting torque to the main shaft. The front-end support device includes a first cylindrical roller bearing, a third spacer, a first thrust ball bearing, a fourth spacer, a second thrust ball bearing and a second lock nut fitted on the main shaft, wherein the fourth spacer The ring is in contact with the step on the front end of the milling head box, and the fifth spacer is installed between the fourth spacer and the outer steel ring of the first cylindrical roller bearing; the rear end support device includes the second cylindrical roller bearing , the sixth spacer, the third thrust ball bearing, the seventh spacer, the fourth thrust ball bearing and the third lock nut, the seventh spacer is in contact with the step on the rear end of the right-angle milling head box, and the seventh spacer An eighth spacer is arranged between the outer steel ring of the second cylindrical roller bearing; the front-end pressing device includes a first flange cover, a first sealing spacer and a second sealing spacer, and the first sealing spacer Arranged on the right side of the outer steel ring of the first cylindrical roller bearing and the second sealing spacer to form a labyrinth seal structure, the first flange cover has a sealing ring groove, and the first flange cover is connected to the right-angle milling head box through screws Connection; together with the labyrinth seal structure formed by the second sealing spacer at the front end of the main shaft, it forms a protective structure to prevent impurities from entering the right-angle milling head and preventing lubricating oil from flowing out of the right-angle milling head box through the end face of the main shaft. The rear-end pressing device includes a second flange cover, a third sealing spacer and a fourth sealing spacer, the third sealing spacer is arranged on the left side of the second cylindrical roller bearing, and the third sealing spacer is connected to the fourth sealing spacer. The sealing spacer forms a labyrinth sealing structure. There is a sealing ring groove on the second flange cover, and the second flange cover is connected with the right-angle milling head box through screws; the sealing groove on the second flange cover is installed after the sealing gasket. Together with the labyrinth seal structure composed of the third sealing spacer and the fourth sealing spacer at the front end of the main shaft, it forms a protective structure to prevent impurities from entering the right-angle milling head and preventing lubricating oil from flowing out of the right-angle milling head box through the end face of the main shaft. The double-sided right-angle milling head also includes a first flat key, a shaft sleeve, a pull rod and a ninth spacer. The main shaft is a hollow main shaft. The shaft sleeve is connected to the rear end of the main shaft through the first flat key, and the pull rod is located in the shaft hole of the main shaft. Inside, the ninth spacer is set on the left end of the tie rod and placed in the counterbore at the rear end of the main shaft.

When the invention is used to install the tool for cutting, double-sided processing can be completed. When the cutting tool is installed at the front end of the main shaft, it can be connected with the tool handle through the thread at the front end of the tie rod, and adjusted through the ninth spacer; when it is necessary to install the milling cutter on the rear end of the main shaft, the milling cutter can be directly connected by the screw Connect with shaft sleeve. Therefore, in use, the double-sided right-angle milling head can complete the powerful milling of parallel planes under the condition of one spindle positioning. The structure of the present invention is simple, compact and reasonable; due to the increase of the installation surface of the cutter, the adjustment operation of the right-angle milling head during processing is reduced, and the production efficiency can be obviously improved; at the same time, because the right-angle milling head can be adjusted once The powerful milling of multiple parallel planes can ensure the positional accuracy of multiple milling planes.

Description of drawings

Embodiments of the invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is the general structural diagram of the present invention.

Among them: 1. Right-angle milling head box, 2. Second flange cover, 3. Third sealing spacer, 4. Fourth sealing spacer, 5. Shaft sleeve, 6. First flat key, 7. Main shaft, 8. Tie rod, 9. Second cylindrical roller bearing, 10. Sixth spacer, 11. Eighth spacer, 12. Third thrust ball bearing, 13. Seventh spacer, 14. Fourth thrust ball bearing, 15. The third lock nut, 16. The first lock nut, 17. The first spacer, 18. The second flat key, 19. The second bevel gear, 20. The second spacer, 21. The second lock Nut, 22. The second thrust ball bearing, 23. The fourth spacer, 24. The first thrust ball bearing, 25. The fifth spacer, 26. The third spacer, 27. The first cylindrical roller bearing, 28. The first sealing spacer, 29. The second sealing spacer, 30. The front pressing device, 31. The first bevel gear, 32. The ninth spacer, 33. The front support device, 34. The middle steering device, 35. The rear End supporting device, 36. the first flange cover, 37. rear end pressing device.

Detailed ways

As shown in Figure 1, a double-sided right-angle milling head includes a first bevel gear 31, a middle steering device 34, a main shaft 7, a front-end support device 33, a rear-end support device 35, a right-angle milling head box 1, and a front-end pressing device. device 30, rear end pressing device 37; the middle steering device 34 includes the second bevel gear 19 meshed with the first bevel gear 31, the second flat key 18, the first spacer 17, the second spacer 20 and the first A locking nut 16, the second bevel gear 19 is connected to the main shaft 7 through the second flat key 18, and the first spacer 17 and the second spacer 20 sleeved on the main shaft 7 are respectively located on the left side of the second bevel gear 19 side and the right side, adjust the first locking nut 16 on the left side of the first spacer 17 to put the first spacer 17, the second bevel gear 19 and the second spacer 20 on the shoulder of the main shaft 7; The middle part of 7 is designed with two keyways, and two second flat keys 18 are installed, the second bevel gear 19 is installed on the main shaft 7 through the second flat key 18, and the second bevel gear 19 and the middle step of the main shaft 7 are installed with The second spacer 20, the first spacer 17 is arranged on the left side of the second bevel gear 19, and is locked by the first locking nut installed on the main shaft. The second bevel gear 19 meshes with another first bevel gear 31 that transmits the output torque of the main shaft, thereby transmitting the cutting torque to the main shaft 7; the front end support device 33 includes a first cylindrical roller bearing sleeved on the main shaft 7 27. The third spacer 26, the first thrust ball bearing 24, the fourth spacer 23, the second thrust ball bearing 22 and the second lock nut 21, wherein the fourth spacer 23 is connected with the front end of the milling head box 1 step contact, the fifth spacer 25 is installed between the fourth spacer 23 and the outer steel ring of the first cylindrical roller bearing 27; the rear end support device 35 includes the second cylindrical roller bearing 9, the sixth spacer Ring 10, the third thrust ball bearing 12, the seventh spacer 13, the fourth thrust ball bearing 14 and the third lock nut 15, the seventh spacer 13 is in contact with the step on the rear end of the right-angle milling head box 1, in the An eighth spacer 11 is arranged between the seven spacers 13 and the outer steel ring of the second cylindrical roller bearing 9; the main shaft 7 is installed on the right angle milling machine through the front end support device 33 and the rear end support device 35 arranged on the main shaft 7 In the head box body 1, it can rotate around the center line of the main shaft 7. The front end pressing device 30 includes a first flange cover 36, a first sealing spacer 28 and a second sealing spacer 29, the first sealing spacer 28 is arranged on the right side of the outer steel ring of the first cylindrical roller bearing 27 It forms a labyrinth seal structure with the second sealing spacer 29, and a sealing ring groove is opened on the first flange cover 36, and the first flange cover 36 is connected with the right-angle milling head box 1 through screws; the rear-end pressing device 37 Including the second flange cover 2, the third sealing spacer 3 and the fourth sealing spacer 4, the third sealing spacer 3 is arranged on the left side of the second cylindrical roller bearing 9, the third sealing spacer 3 and the fourth sealing spacer The spacer 4 forms a labyrinth seal structure, the second flange cover 2 is provided with a sealing ring groove, and the second flange cover 2 is connected with the right-angle milling head box 1 through screws; the double-sided right-angle milling head also includes a first flat key 6 , shaft sleeve 5, pull rod 8 and the ninth spacer 32, the main shaft 7 is a hollow main shaft, the shaft sleeve 5 is connected to the rear end of the main shaft 7 through the first flat key 6, and the pull rod 8 is located in the shaft hole of the main shaft 7, The ninth spacer ring 32 is sleeved on the left end of the pull rod 8 and placed in the counterbore at the rear end of the main shaft 7 . When the invention is used to install the tool for cutting, double-sided processing can be completed. When the cutting tool is installed at the front end of the main shaft 7, it can be connected with the tool handle through the thread at the front end of the pull rod 8, and adjusted through the ninth spacer ring 32; Connect the milling cutter head directly to the hub. Therefore, in use, the double-sided right-angle milling head can complete powerful milling on parallel planes under the condition that the primary spindle 7 is positioned.

The structure of the present invention is simple, compact and reasonable; due to the increase of the installation surface of the cutter, the adjustment operation of the right-angle milling head during processing is reduced, and the production efficiency can be obviously improved; at the same time, because the right-angle milling head can be adjusted once The powerful milling of multiple parallel planes can ensure the positional accuracy of multiple milling planes.

Claims (1)

1. Double-sided right-angled milling head, comprise the first bevel gear (31), middle part transfer (34), main shaft (7), front end support device (33), rear end support device (35), milling head casing (1), front end hold down gag (30), rear end hold down gag (37), wherein: described middle part transfer (34) comprising: with second bevel gear (19) of the first bevel gear (31) engagement, the second flat key (18), the first spacer ring (17), the second spacer ring (20) and the first locking nut (16), described the second bevel gear (19) is connected on main shaft (7) by the second flat key (18), be sleeved on left side and right side that upper the first spacer ring of main shaft (7) (17) and the second spacer ring (20) lay respectively at the second bevel gear (19), the first locking nut (16) of regulating the first spacer ring (17) left side can be by the first spacer ring (17), the second bevel gear (19) and the second spacer ring (20) withstand on the shaft shoulder of main shaft (7), described front end support device (33) comprising: be sleeved on the first cylinder roller bearing (27), the 3rd spacer ring (26), the first thrust ball bearing (24), the 4th spacer ring (23), the second thrust ball bearing (22) and the second locking nut (21) on main shaft (7), wherein the 4th spacer ring (23) contacts with the step of the upper front end of milling head casing (1), and the 5th spacer ring (25) is installed between the outer rim of the 4th spacer ring (23) and the first cylinder roller bearing (27), described rear end support device (35) comprising: the second cylinder roller bearing (9), the 6th spacer ring (10), the 3rd thrust ball bearing (12), the 7th spacer ring (13), the 4th thrust ball bearing (14) and the 3rd locking nut (15), the 7th spacer ring (13) contacts with the step of the upper rear end of right-angle milling head casing (1), between the outer rim of the 7th spacer ring (13) and the second cylinder roller bearing (9), is furnished with the 8th spacer ring (11), described front end hold down gag (30) comprising: the first blind flange (36), the first sealing spacer ring (28) and the second sealing spacer ring (29), outer rim right side and the second sealing spacer ring (29) that the first sealing spacer ring (28) is arranged in the first cylinder roller bearing (27) form labyrinth seal structure, the first blind flange has seal groove on (36), and the first blind flange (36) is connected with right-angle milling head casing (1) by screw, described rear end hold down gag (37) comprising: the second blind flange (2), the 3rd sealing spacer ring (3) and the 4th sealing spacer ring (4), the 3rd sealing spacer ring (3) is arranged in the second cylinder roller bearing (9) left side, the 3rd sealing spacer ring (3) forms labyrinth seal structure with the 4th sealing spacer ring (4), the second blind flange has seal groove on (2), and the second blind flange (2) is connected with right-angle milling head casing (1) by screw, it is characterized in that: Double-sided right-angled milling head also comprises the first flat key (6), axle sleeve (5), pull bar (8) and the 9th spacer ring (32), described main shaft (7) is a hollow spindle, axle sleeve (5) is connected to the rear end of main shaft (7) by the first flat key (6), pull bar (8) is positioned at the axis hole of main shaft (7), and the 9th spacer ring (32) is sleeved on the left end of pull bar (8) and is placed in the counterbore of main shaft (7) rear end.

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