CN202576482U - Rotating table - Google Patents

Abstract

The utility model provides a rotating table which comprises a rotary table and a base. The rotary table comprises a cylinder-shaped body and a table surface which is located in the middle section of the body, the body is provided with an upper free end and a lower free end along the vertical direction, the base is cylinder-shaped, an inner cavity of the base accommodates the lower free end of the body of the rotary table, the rotary table is connected with the base through a bearing, the bearing comprises a thrust ball bearing, an angular contact ball bearing and a deep groove ball bearing, the thrust ball bearing is horizontally arranged, and the angular contact ball bearing and the deep groove ball bearing are vertically arranged. By means of the bearing, loads are borne axially and radially, so that stable and accurate rotation of the rotating table is achieved.

Description

Rotary table

technical field

The utility model relates to a rotary workbench, in particular to a rotary workbench for gear induction hardening process, which belongs to the technical field of mechanical engineering. the

Background technique

The rotary table is a common component processing machine tool accessory in mechanical engineering. It has a rotatable table for clamping the workpiece and realizing rotation and indexing positioning. It is referred to as the turntable or the fourth axis. The induction hardening process of gears can also be realized by a rotary table, but in the process of tooth-by-tooth induction hardening of gears, the gap between the inductor and the gear needs to be precisely controlled to ensure that the quenched gears are uniform and qualified. hardened layer. the

Therefore, there are the following requirements for the rotary table where the gear is placed: 1. It can rotate smoothly; 2. The gear can be stably fixed on the rotary table to ensure that no displacement occurs during quenching; 3. The runout of the gear tooth end surface is 0.05 Within mm; 4. The runout of the gear addendum circular surface is within 0.05mm. the

Utility model content

The purpose of the utility model is to provide a rotary workbench with compact structure, good rigidity and smooth rotation, which is suitable for tooth-by-tooth induction hardening of gears. the

The purpose of this utility model is achieved through the following technical solutions:

A rotary table includes a turntable and a base, the turntable includes a cylindrical main body and a table located in the middle of the main body, the main body has two free ends along the vertical direction, the base is a cylinder, and the inner The cavity accommodates the lower free end of the main body of the turntable, and the turntable and the base are connected by bearings, and the bearings include thrust ball bearings arranged horizontally, angular contact ball bearings and deep groove ball bearings arranged vertically.

Preferably, a spacer is provided between the angular contact ball bearing and the deep groove ball bearing. the

Preferably, the lower free end of the main body is further provided with a pressure ring, which is connected to the turntable through threads, and the position between the bearing, the turntable and the base is fixed through the pretightening force of the threads between the two. the

Preferably, it also includes a compression nut screwed on the upper free end of the main body, and the gear workpiece placed between them is compressed by providing an axial force with the pretightening force of the thread. the

Preferably, the main body of the turntable is also provided with a horizontal adjustment nut, and the radial pressure provided by the thread pre-tightening force is used to adjust the runout of the gear circular surface, so that the runout of the gear addendum circular surface is controlled within 0.05 mm, which can make the gear more stable It is firmly fixed on the rotary table to ensure that the gear does not shift during quenching, so that the gap between the gear and the inductor can be precisely controlled, so that the hardened layer obtained after the gear is quenched will be more uniform. the

Further preferably, a vertical adjustment nut is provided on the table surface of the turntable, and the thread pre-tightening force provides axial pressure to adjust the runout of the gear end face, so that the runout of the gear tooth end face is controlled within 0.05mm. In this way, the gear can be more stably fixed on the rotary table, ensuring that the gear does not shift during quenching, so that the gap between the gear and the inductor can be controlled more precisely, and the gear can obtain a more uniform hardened layer after quenching. the

The beneficial effects of the utility model are mainly reflected in that: since the turntable and the base of the rotary table are connected to each other by deep groove ball bearings, angular contact bearings, and thrust ball bearings, they can carry loads evenly in the axial and radial directions respectively, and realize The smooth and precise operation of the rotary table is ensured. the

If the method of horizontal adjustment nut and vertical adjustment nut is further adopted to make the runout of the end surface of the gear tooth part within 0.05mm and the runout of the gear tooth top circular surface within 0.05mm, the gear can be fixed more stably on the rotary table. Achieve more precise control of the gap between the gear and the inductor, resulting in a more uniform hardened layer on the gear. the

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described. the

Fig. 1 is a structural schematic diagram of a rotary table of the present invention. the

Fig. 2 is a top view of the utility model rotary table. the

Detailed ways

Embodiments of the present utility model are described below with reference to the accompanying drawings. the

As shown in Figures 1 and 2, the rotary table of the present invention includes a turntable 1 and a base 2, wherein the turntable 1 is an integrated structure, including a cylindrical main body 11 and a table 12 located in the middle of the main body 11, the main body 11 has two upper and lower free ends 13 , 14 along the vertical direction, and the table top 12 also has two upper and lower flat surfaces 15 , 16 along the vertical direction. In the working state, the workpiece to be processed is placed on the upper plane 15 of the table 12, and is compressed by the compression nut 4 screwed on the upper free end 13 of the main body 11, and the axial force is provided by means of the thread pre-tightening force. The gear workpiece is placed tightly between the two. the

Horizontal adjustment nuts 5 are evenly distributed along the circumference of the main body 11, which are connected to the turntable 1 through threads, and the radial force is transmitted to the gear by means of thread pre-tightening force, and the circular surface runout of the adjustment gear is within 0.05mm. the

Vertical adjustment nuts 6 are evenly distributed along the circumference of the table surface 12, and are connected to the turntable 1 through threads, and the axial force is transmitted to the gear by means of thread pre-tightening force, and the runout of the end surface of the adjustment gear is within 0.05mm. the

The base 2 is also a cylinder, and its inner cavity is used to accommodate the lower free end 14 of the main body 11 of the turntable 1, please refer to Fig. 1, the lower free end 14 is connected to the base 2 through three bearings 7, 8, 9 , where bearing 7 is a thrust ball bearing for carrying axial loads, bearing 8 is an angular contact ball bearing for carrying axial loads and radial loads, and bearing 9 is a deep groove ball bearing for carrying radial loads . the

In addition, a spacer 3 is provided between the bearing 8 and the bearing 9 for precise positioning of the two. the

On the lower free end 14 of the main body 11, a pressure ring 10 is also provided, which is connected with the turntable 1 by threads, and the thread pretightening force between the two fixes the bearings 7, 8, 9, turntable 1, and base 26 position between them. the

The utility model can be connected to a gear induction hardening machine tool through a base, and the turntable can rotate relative to the base. During normal operation, the hydraulic mechanism, servo motor, etc. can be used to drive the turntable to rotate and index it. the

The utility model is not limited to the aforementioned embodiments, and those skilled in the art may make other changes under the enlightenment of the technical essence of the utility model, but as long as the functions realized are the same or similar to those of the utility model, they shall all belong to the utility model. A new type of protection. the

Claims (6)

1. A rotary table, comprising a turntable (1) and a base (2), characterized in that: the turntable (1) includes a cylindrical main body (11) and a table (12) located in the middle of the main body (11) ), the main body (11) has two upper and lower free ends (13, 14) along the vertical direction, the base (2) is a cylinder, and its inner cavity accommodates the lower part of the main body (11) of the turntable (1) The free end (14), the turntable (1) and the base (2) are connected by bearings, and the bearings include horizontal thrust ball bearings (7) and vertical angular contact ball bearings (8) and deep groove ball bearing (9). 2. The rotary table according to claim 1, characterized in that: a spacer (3) is provided between the angular contact ball bearing (8) and the deep groove ball bearing (9). 3. The rotary table according to claim 2, characterized in that: the lower free end (14) of the main body (11) is also provided with a pressure ring (10), which is connected to the turntable (1) through threads, and through The thread pretightening force between the two fixes the mutual positions of the bearings (7, 8, 9), the turntable (1) and the base (2). 4. The rotary table according to claim 1, characterized in that: it also includes a compression nut (4) threaded on the upper free end (13) of the main body (11) to provide an axial The force compresses the gear workpiece placed between the two. 5. The rotary table according to claim 1, characterized in that: the main body (11) of the rotary table (1) is also provided with a horizontal adjustment nut (5). 6. The rotary table according to claim 1, characterized in that: a vertical adjustment nut (6) is also provided on the table (12) of the rotary table (1).

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