CN204183309U - With dynamic knife machining mechanism - Google Patents

Abstract

The utility model provides a synchronous knife punching mechanism, which comprises a mounting base, a rocker arm, and a knife punching cylinder. For the follower and the third follower, the corner of the L-shaped rocker arm is connected to the mounting base through a rotating shaft; the knife-making cylinder is fixedly connected to the mounting base, and the cylinder body of the knife-making cylinder is provided with a fixed bracket. A return spring and a travel limit switch are arranged on the fixed bracket; the return spring is connected with the long arm of the L-shaped rocker arm through a spring hook; a convex portion is also arranged on the long arm of the L-shaped rocker arm, and the convex portion A second follower is provided, and the second follower is located on the upper part of the knife punching cylinder push rod, and the contact point of the travel limit switch is located on the side of the second follower. The utility model can realize fast knife making. , The structure is simple and easy to assemble, the cutting precision is high, and the precision is not easy to lose after long-term use.

Description

Simultaneous knife punching mechanism

technical field

The utility model relates to the field of CNC machine tool magazines, in particular to a synchronously moving knife punching mechanism.

Background technique

The disc-type synchronous knife magazine with synchronous knife punching mechanism is a technology widely used in the field of CNC machine tools. Synchronous knife cutting is also called mechanical knife cutting. Compared with non-synchronous knife cutting, it has the characteristics of fast tool change and high processing efficiency. However, there are problems such as relatively complex structure, difficult assembly, high failure rate, and high cost in the synchronous knife-beating mechanism.

As shown in Figure 1, the existing traditional synchronous knife punching mechanism not only consists of many parts, but also has a complex structure and cumbersome assembly. Moreover, the accuracy of the knife punching amount is easily lost after long-term operation, resulting in insufficient broaching force and thus falling off. The knife affects the processing efficiency, the reliability is poor, and the production cost of the whole set of mechanisms is relatively high.

Contents of the invention

In order to overcome the defects existing in the prior art, the purpose of this utility model is to provide a kind of synchronous knives beating mechanism, including installation base, rocker arm, knife beating cylinder, said rocker arm is L-shaped, and the length of L-shaped rocker arm is The ends of the arm and the short arm are respectively provided with a first follower and a third follower, and the corner of the L-shaped rocker arm is connected to the mounting base through a rotating shaft; The cylinder body of the cylinder is provided with a fixed bracket, and the fixed bracket is provided with a return spring and a travel limit switch; the return spring is connected with the long arm of the L-shaped rocker arm through a spring hook; the length of the L-shaped rocker arm The arm is also provided with a convex portion, and the convex portion is provided with a second follower, the second follower is located on the upper part of the knife cylinder push rod, and the contact of the travel limit switch is located on the second follower. side of the device.

A further improvement is that, the lower end surface of the installation base is also provided with a cutting amount adjustment piece.

A further improvement lies in that the moving direction of the push rod of the knife driving cylinder is consistent with the axial direction of the spindle of the CNC machine tool.

A further improvement is that the L-shaped rocker arm is an integral high-strength casting.

A further improvement is that the third follower at the end of the short arm of the L-shaped rocker arm is located above the spindle cutter ring on the spindle of the CNC machine tool.

A further improvement is that the synchronous knife beating mechanism also includes an automatic knife beating drive device, and the automatic knife beating drive device includes: a knife arm motor, a knife arm, a cam disc, a chain, a cam box, and the L-shaped rocker arm The first follower at the end of the long arm is in rolling contact with the cam disc.

The beneficial effect of the utility model is that: the utility model knife punching cylinder adopts a lower type, and the push rod pushes up the second follower. It can meet the needs of use and greatly save the production cost; the adjustment of the cutting amount of the utility model is to adjust the amount of the L-shaped rocker arm to press the spindle cutting ring down by matching the height of the cutting amount repair piece. This technology The advantage of the solution is that after the amount of cutting is adjusted, no matter how long the machine tool is used, the cutting precision will remain unchanged, avoiding the loss of cutting precision after long-term use of the traditional cutting mechanism; the utility model L-shaped rocker arm The one-piece high-strength casting design avoids the complex structure and difficult assembly of the traditional split design, and the artificial assembly factors have a great influence on the accuracy of the cutting amount. The utility model has the advantages of fast cutting speed, simple structure and easy assembly, high cutting precision, long-term use precision is not easy to lose, and low manufacturing cost.

Description of drawings

Fig. 1 is the schematic diagram of prior art knife-beating mechanism;

Fig. 2 is a schematic diagram of the overall structure of the utility model's synchronous knife-beating mechanism;

Fig. 3 is a left view of the overall structure of the utility model's synchronous knife beating mechanism;

Fig. 4 is a schematic diagram of the connection structure between the utility model's synchronous knife beating mechanism and the spindle of the CNC machine tool;

Fig. 5 is a structural schematic diagram of the automatic working mode of the synchronous knife-beating mechanism of the utility model;

Fig. 6 is a structural schematic diagram of the automatic working mode of the synchronous knife-beating mechanism of the utility model;

Fig. 7 is a structural schematic diagram of the automatic working mode of the synchronous knife-beating mechanism of the utility model;

Fig. 8 is a structural schematic diagram of the knife punching amount repairing piece of the utility model's synchronous knife punching mechanism.

In the attached drawings: 1-rocker arm, 2-first follower, 3-second follower, 4-return spring, 5-travel limit switch, 6-fixed bracket, 7-knife cylinder, 8- Mounting base, 9-rotating shaft, 10-third follower, 11-knife arm, 12-cam box, 13-spindle box, 14-spindle, 15-disc type synchronous tool magazine, 16-cam disc, 17 -Spindle knife ring, 18-chain, 19-knife arm motor, 20-knife amount repair piece

Detailed ways

In order to facilitate the understanding of the structure of the utility model, the following will be described in conjunction with the accompanying drawings and embodiments.

The structure of the utility model's synchronous knife beating mechanism is shown in Figures 2 and 3. The rocker arm 1 is L-shaped, and the ends of the long arm and the short arm of the L-shaped rocker arm 1 are respectively provided with a first follower 1 and a The third follower 10, the corner of the L-shaped rocker arm 1 is connected with the mounting base 8 through the rotating shaft 9, which can realize the swing in the up and down range centered on the rotating shaft 9; the fixed bracket 6 is installed on the knife cylinder 7 by screws On the cylinder body, the installation base 8 is fixedly connected with the knife cylinder 7; the return spring 4 and the travel limit switch 5 are installed on the fixed bracket 6, and one end of the return spring 4 is connected to the long arm of the L-shaped rocker arm 1 through a spring hook The long arm of the L-shaped rocker arm 1 is also provided with a convex portion, the convex portion is provided with a second follower 3, the second follower 3 is located at the top of the knife cylinder 7 push rod, and the stroke limit switch 5 The contacts are located on the side of the second follower 3.

The knife-beating mode of the knife-beating mechanism of the utility model can be divided into two kinds, manual knife-beating and automatic knife-beating.

Specifically, as shown in Figure 4, the manual knife is to control the up and down movement of the push rod of the knife cylinder 7 through the solenoid valve. When the push rod moves upward, the nut on the push rod will push the second follower 3 moving upwards, the L-shaped rocker arm 1 will swing back and forth around the rotating shaft 9, and at the same time, the third follower 10 will press the main shaft knife ring 17 downward, thereby realizing the manual knife action of the main shaft 14.

Specifically, as shown in Figures 5, 6, and 7, the principle of action of automatically punching a knife: the rotation of the knife arm motor 19 drives the knife arm 11 to rotate, the cam disc 5 is connected with the cam box 12 by a chain 16, and the knife arm 11 passes through the cam box 12 , chain 16, wheel disc 5 and the first follower 2 linkage of the long arm end of L-shaped rocker arm 1; concentric position), the cam disc 5 rotates synchronously to the maximum outer circle, and the short arm of the L-shaped rocker arm 1 presses down, so that the third follower 10 presses down the main shaft knife ring 17, realizing the main shaft 14 knife action. Simultaneous knife cutting means that during the process of turning the knife arm 11 and changing the knife, the cam box 12 rotates with the cam disc 5 rotating at the same time, and the short arm of the L-shaped rocker arm 1 presses down on the main shaft knife ring 17 to realize the main shaft knife knife. This process is It is carried out synchronously, so the tool change speed is fast.

Specifically, the adjustment of the cutting amount is shown in Fig. 3 and Fig. 8. The function of the cutting amount repair piece 20 is equivalent to the adjustment shim, which is placed between the installation base 8 and the headstock 13, and the cutting amount is adjusted by grinding. The height value h of the sheet 20 is used to adjust the amount by which the L-shaped rocker arm 1 presses down the main shaft knife ring 17 (this value is the amount of knife beating of the main shaft).

The utility model has been described in detail above in conjunction with the embodiments of the accompanying drawings, and those skilled in the art can make various changes to the utility model according to the above description. Therefore, some details in the embodiments should not constitute limitations to the utility model, and the utility model shall take the scope defined by the appended claims as the scope of protection.

Claims (6)

1. A synchronous knife-beating mechanism, comprising a mounting base, a rocking arm, and a knife-beating cylinder, is characterized in that: the rocking arm is L-shaped, and the ends of the long arm and the short arm of the L-shaped rocking arm are respectively provided with a first One follower and the third follower, the corner of the L-shaped rocker arm is connected to the installation base through the rotating shaft; The fixed bracket is provided with a return spring and a travel limit switch; the return spring is connected with the long arm of the L-shaped rocker arm through a spring hook; a protrusion is also arranged on the long arm of the L-shaped rocker arm, and the protrusion The second follower is arranged on the upper part, and the second follower is located on the upper part of the knife-driving cylinder push rod, and the contact of the stroke limit switch is located on the side of the second follower. 2. The synchronously moving knife striking mechanism according to claim 1, characterized in that: the lower end surface of the installation base is also provided with a knife striking amount adjustment piece. 3. The synchronous knife-driving mechanism according to claim 1, characterized in that: the moving direction of the push rod of the knife-driving cylinder is consistent with the axial direction of the spindle of the CNC machine tool. 4. The synchronous knife beating mechanism according to claim 1, characterized in that: the L-shaped rocker arm is an integral high-strength casting. 5. The synchronous knife-cutting mechanism according to claim 1, characterized in that: the third follower at the end of the short arm of the L-shaped rocker arm is located above the spindle knife-cutting ring on the spindle of the CNC machine tool. 6. The synchronous knife beating mechanism according to claim 1, characterized in that: the synchronous knife beating mechanism also includes an automatic knife beating driving device, and the automatic knife beating driving device includes: a knife arm motor, a knife arm, The cam disc, the chain, the cam box, and the first follower at the long arm end of the L-shaped rocker arm are in rolling contact with the cam disc.