CN204621691U - Five axle synchronous revolving milling indexing means - Google Patents

Abstract

The utility model discloses a kind of five axle synchronous revolving milling indexing means, it is characterized in that comprising five axle synchronous revolving milling dividing head and pneumatic tail centres; The output shaft that the jackshaft of five axle synchronous revolving milling dividing heads is clamped by the 4th axle chuck of shaft coupling and processing center machine tool or CNC milling machine is connected; Another axle head is separately installed with detachable mandrel and the workpiece on it; Utilize top axial location and the locking realizing workpiece 8 of Pneumatic tail, thus realize the Milling Process to workpiece.The utility model can promote the cutting utilization rate of the 4th axle and chrcular index processing parts, reduces labor strength, thus realizes the highly-efficient processing that a work step processes five products.

Description

Indexing device for five-axis synchronous rotary milling

technical field

The utility model relates to a high-efficiency device which can be used as an accessory of a machining center or a numerical control milling machine to process five products at a time, in particular to an indexing device for five-axis synchronous rotary milling.

Background technique

Machining center or CNC milling machine is characterized by centralized process, strong adaptability to processing objects, high efficiency and high precision. When batch processing requires rotary dividing head to process workpieces with holes, keyways and planes on the circumference, the traditional method is to use The fourth axis of the machining center is the three-jaw chuck on the rotary indexing head to clamp the mandrel and process the workpiece on the mandrel in a single piece. If the top support is required, it is also a hand-operated top tailstock. Manually rotate the handle of the tail top seat to make the tail top The milling process of the product can be carried out by jacking into the center hole.

The time required for parts processing includes two parts: motor time and auxiliary time. The machining center is equipped with a tool magazine and an automatic tool changer, which can complete multiple processes on one machine tool, thus reducing the time for workpiece clamping, measurement and machine tool adjustment. When processing some parts that need to use a rotary dividing head When , the auxiliary time of single-piece processing accounts for a higher ratio of the entire processing time. During batch processing, the operator needs to open the protective door of the machine tool frequently. If a hand-cranked top tailstock is required, the auxiliary time will be longer, and it is difficult to realize the operation of multiple machines by one operator. Therefore, the fourth axis of the machining center is the rotary dividing head for machining. The cutting utilization rate of the machine tool for parts is not very high, about 60%.

Contents of the invention

In order to solve the shortcomings of the above-mentioned prior art, the utility model proposes a five-axis synchronous rotary milling indexing device, in order to improve the fourth axis, that is, the cutting utilization rate of the parts processed by the rotary indexing head, and reduce the labor intensity of workers , so as to realize the efficient processing of five products in one step.

The utility model solves the technical problem and adopts the following technical solutions:

The utility model is a dividing head device for five-axis synchronous rotary milling, which is applied to machining center machine tools or numerical control milling machines, and its structural feature is to include a dividing head for five-axis synchronous rotary milling and a pneumatic tail tip; the five-axis The indexing head for synchronous rotary milling is composed of the indexing head for milling of the intermediate driving shaft and the indexing head for milling of two driven shafts on the left and right. The tail of the indexing head for milling of the intermediate shaft is provided with a driving gear; The tails of the indexing heads for milling of the left and right driven shafts are respectively provided with driven gear assemblies;

The tail end of the indexing head for milling of the intermediate driving shaft is connected to the output shaft clamped by the fourth axis chuck of the machining center machine tool or CNC milling machine through a coupling; the indexing head for five-axis synchronous rotary milling The other shaft ends of the head are respectively equipped with detachable mandrels, and the workpieces to be processed are installed on the detachable mandrels;

The pneumatic tail top includes a thin single-rod double-acting cylinder, a top sleeve and a rotary flat head; the thin single-rod double-acting cylinder pushes the top sleeve forward, and drives the rotary flat top at the front end of the top sleeve Push against the end face of the workpiece to form an axial positioning and locking structure for the workpiece;

Use the output shaft clamped by the fourth axis chuck to drive the driving gear on the milling indexing head of the intermediate driving shaft and drive the two left and right driven gear assemblies to rotate synchronously; thus making the five axes rotate synchronously The dividing head for milling drives the workpiece to rotate together through the detachable mandrel, and uses the quick-change milling chuck of the machining center machine tool or CNC milling machine to form a milling structure for the workpiece.

The structural features of the dividing head device for five-axis synchronous rotary milling described in the utility model also lie in:

The driven gear assembly includes a first gear and a second gear; an adjustable anti-backlash device is provided on the first gear and the second gear; the adjustable anti-backlash device includes two symmetrically arranged cones An adjusting screw and four locking screws symmetrically arranged; the two conical adjusting screws are used to form an adjusting structure for the gear backlash that meshes with each other between the first gear and the second gear; the four locking screws The screw forms a locking structure between the first gear and the second gear.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The utility model uses the fourth axis of the machining center, that is, the rotary indexing head, to connect the five-axis synchronous rotary milling indexing head and the pneumatic tail tip to form a high-efficiency processing of five products in one step. Compared with single-axis single-piece processing with dividing head, the work efficiency is improved by more than 1 to 2 times, and the labor intensity of workers can be reduced at the same time. For products that require multiple tool changes, the number of tool changes on the machine tool can be greatly reduced during the same process step, and the machine tool is improved. Production efficiency and equipment utilization;

2. The driven gear of the utility model is designed with an adjustable device for eliminating backlash, which realizes the high rotation accuracy of the driving and driven gears during forward and reverse processing, and can realize the processing of products with the technical requirements of the circumferential position, such as the need for Process equally divided holes, planes, keyways or holes, surfaces, grooves with angle requirements, and achieve high circumferential position accuracy requirements ≤±15′;

3. The utility model can realize the axial fast positioning and clamping of the product through the pneumatic tail tip, which reduces the labor intensity of workers and shortens the auxiliary processing time;

4. The utility model realizes the clamping of different parts by replacing the mandrels at different shaft ends, so it is suitable for different products;

5. The device of this utility model is used in combination with the fourth axis of the machining center. It has a compact structure and can be used as an accessory of a machine tool. It can process five products at a time, with high rotation precision and convenient loading and unloading. It is especially suitable for batch product processing. Different products can be processed by replacing different products. It is realized by the shaft end mandrel, which is conducive to popularization.

Description of drawings

Fig. 1 is a front view of the utility model;

Fig. 2 is a top view of the utility model;

Fig. 3 is a schematic diagram of the adjustable backlash elimination device of the present invention;

Fig. 3 a is the sectional view of A-A among Fig. 3;

Symbols in the figure: 1 The fourth axis of the machining center is the rotary indexing head; 2 Coupling; 3 Driven gear assembly; 3a The first gear; 3b The second gear; 3c Conical adjustment screw; 3d Locking screw; 4 Drive Gear; 5 dividing head for five-axis synchronous rotary milling; 6 detachable mandrel; 7 quick-change milling chuck; 8 workpiece; 9 five-axis pneumatic tail tip.

Detailed ways

In this embodiment, as shown in Figure 1, an indexing head device for five-axis synchronous rotary milling includes: a five-axis synchronous rotary milling device connected to the fourth axis 1 of the machining center machine tool or CNC milling machine, that is, the rotary indexing head The indexing head 5 and the pneumatic tail center 9 are an integral device; as shown in Figure 2, the indexing head 5 for five-axis synchronous rotary milling is composed of the middle driving shaft of the milling indexing head and two driven shafts on the left and right. , the tail of the intermediate shaft is equipped with a driving gear 4; the tails of the two driven shafts on the left and right are respectively equipped with a driven gear wheel assembly 3;

As shown in Figure 2, the fourth axis of the machining center machine tool or CNC milling machine, that is, the output shaft clamped by the chuck of the rotary indexing head, is connected to the tail end of the milling indexing head of the intermediate drive shaft through a coupling 2; thus driving The driving gear 4 on the dividing head for milling of the middle driving shaft drives the two left and right driven gear wheel assemblies 3 to mesh with each other to form a synchronous rotation; plane bearings and needle bearings are installed on the driving and driven shafts;

The other shaft end of the dividing head 5 for five-axis synchronous rotary milling is respectively equipped with a detachable mandrel 6, and the detachable mandrel 6 is equipped with a workpiece 8 to be processed, and can be replaced according to different products.

The pneumatic tail top 9 includes a thin single-rod double-acting cylinder, a top sleeve and a rotary flat head; the thin single-rod double-acting cylinder pushes the top sleeve to move forward and backward, and drives the rotary flat head top of the front end of the top sleeve to abut against the workpiece 8 The end face, so as to realize the axial rapid positioning and locking of the workpiece 8 and the replacement requirements of different products;

The dividing head 5 for five-axis synchronous rotary milling drives the workpiece 8 to rotate synchronously through the detachable mandrel 6 to form the quick-change milling chuck 7 of the machining center machine tool or CNC milling machine to realize drilling, The milling processing structure of slot milling, plane milling, spiral slot milling and other processes, and the entire five-axis synchronous rotary milling is connected with the working table of the machine tool with the dividing head device.

In the specific implementation, in order to make the active and driven shafts form a synchronous rotation clearance to meet the higher requirements of the rotation accuracy of the circumferential position, an adjustable anti-backlash device is provided in the design process of the driven gear assembly 3 and the shaft;

Specifically, as shown in Figure 3a, each set of driven gear assemblies 3 on the driven shaft includes a first gear 3a and a second gear 3b; an adjustable anti-backlash device is provided on the first gear 3a and the second gear 3b ; As shown in Figure 3, the anti-backlash adjustable device includes two symmetrically arranged conical adjusting screws 3c and four symmetrically arranged locking screws 3d; the first gear 3a and the second gear 3b are installed in pairs, and the conical adjusting screws The threaded hole of 3c and the step hole on it are misaligned by 1°. When the conical adjusting screw 3c is screwed in, its conical surface is in contact with the inner hole of the step. When the conical adjusting screw 3c is continued to be screwed in, the second gear 3b will The center of the first gear 3a can be slightly rotated to adjust the backlash of the gears between the two shafts, so as to minimize the backlash between the meshing gears with the paired gears; the rotation of the tapered adjustment screw 3c can make the two gears of the driven gear assembly Reverse micro-rotation achieves the effect of adjusting the backlash of the gear; then the four locking screws 3d lock the two gears of the driven gear assembly, and the double keyway in the first gear 3a is connected to the shaft, thereby adjusting with two tapers The screw 3c forms an adjustment structure for the gear backlash between the first gear 3a and the second gear 3b; four locking screws 3d form a locking structure between the first gear 3a and the second gear 3b;

In this embodiment, the adjustment of the gear gap on each shaft is adjusted during installation, and the gap adjustment step is to first install the shaft and the driving gear in the middle of Figure 2, and then install the shafts and driven gear assemblies on both sides. The way of adjusting the gear assembly is to adjust the tooth side clearance of the gears meshing with each other. After locking, install the outer shaft and driven gear assembly respectively and adjust the gear meshing clearance. Through manual adjustment and locking of the paired gears during the assembly process, manual When the intermediate shaft is rotated, the gears mesh with each other flexibly, there is no dead point, and there is no backlash during forward and reverse rotation, and the circumferential position accuracy of the main and driven gears during forward and reverse rotation is ≤±15′, so that it can be processed with the technology of circumferential position degree Required products, such as holes, planes, keyways, or holes, surfaces, and grooves with angular requirements, need to be processed on the circumference.

In concrete implementation, the utility model is to carry out actual operation according to the following steps:

1. Fix the entire device on the table of the machining center as shown in Figure 2. When installing the dividing head 5 for five-axis synchronous rotary milling and the five-axis pneumatic tail center 9, it is necessary to find the center position, and connect the machine tool to the fourth position through the coupling 2. Axis 1, that is, the rotary indexing head is connected to the intermediate shaft of the indexing head 5 for five-axis synchronous rotary milling;

2. Replace the detachable mandrel 6, which is equipped with the workpiece 8 to be processed, and adjust the position of the five-axis pneumatic tail tip 9 to facilitate the disassembly of the workpiece 8;

3. Compiling the CNC machining program, correcting the coordinates of each workpiece, installing the workpiece 8 on the mandrel 6, the five-axis pneumatic tail center 9 can realize the axial locking of the workpiece 8, and the quick-change milling chuck 7 of the machine tool through the CNC The program realizes the milling process of drilling, slot milling, plane milling, and spiral slot milling on the circumference of the workpiece 8.

When the device of the utility model is processing such products, it is easy to realize one-person multi-machine operation, so the cutting utilization rate of the machine tool when machining parts with the fourth axis of the machining center, that is, the rotary dividing head, can reach more than 80% of the cutting time and the starting time.

Claims (2)

1. A five-axis synchronous rotary milling indexing device is applied in a machining center machine tool or a CNC milling machine, and is characterized in that it comprises a five-axis synchronous rotary milling indexing head (5) and a pneumatic tail top (9); The dividing head (5) for five-axis synchronous rotary milling is composed of the dividing head for milling of the central driving shaft and the dividing head for milling of the two driven axes on the left and right. The tail of the dividing head for milling of the intermediate shaft is arranged There is a driving gear (4); the tails of the left and right driven shaft milling dividing heads are respectively provided with a driven gear assembly (3); The tail end of the dividing head for milling of the intermediate driving shaft is connected with the output shaft clamped by the fourth axis chuck of the machining center machine tool or CNC milling machine through a coupling (2); the five-axis synchronous rotary milling machine The other shaft end of the dividing head (5) is respectively equipped with a detachable mandrel (6), and the workpiece (8) to be processed is housed on the detachable mandrel (6); The pneumatic tail top (9) includes a thin single-rod double-acting cylinder, a top sleeve and a rotary flat head; the thin single-rod double-acting cylinder pushes the top sleeve forward, and drives the front end of the top sleeve The top of the rotary flat head abuts on the end surface of the workpiece (8), thereby forming an axial positioning and locking structure of the workpiece (8); Drive the driving gear (4) on the milling dividing head of the middle driving shaft with the output shaft clamped by the fourth shaft chuck and drive the two left and right driven gear assemblies (3) to rotate synchronously; thus The dividing head (5) for five-axis synchronous rotary milling drives the workpiece (8) to rotate together through the detachable mandrel (6), and uses the quick-change milling chuck of the machining center machine tool or CNC milling machine (7) Forming a milling structure for the workpiece (8). 2. The indexing device for five-axis synchronous rotary milling according to claim 1, characterized in that: the driven gear assembly (3) includes a first gear (3a) and a second gear (3b); The first gear (3a) and the second gear (3b) are provided with anti-backlash adjustable devices; the anti-backlash adjustable devices include two symmetrically arranged conical adjusting screws (3c) and four symmetrically arranged locking screw (3d); form the adjusting structure of the gear backlash between the first gear (3a) and the second gear (3b) with the two conical adjustment screws (3c); use the four A locking screw (3d) forms a locking structure between the first gear (3a) and the second gear (3b).