CN103551931A - Numerically-controlled double-headed and single-sided special grinder for grinding knives and scissors - Google Patents

Abstract

A CNC double-head single-sided special grinding machine for grinding knives and scissors. A double-spindle assembly is installed on one side of the frame (1) along the X-axis. Each spindle assembly (8) is equipped with a grinding wheel head frame (7) at the front end and connected There is a pulley (9) driven by a motor; the upper surface of the frame is equipped with a lower seat (2) that can move along the X axis, and a middle slide seat (3) that can move along the Z axis is installed on the lower seat. An upper sliding seat (4) movable along the X-axis is installed on the surface, a workbench (5) is installed on the upper slide seat, and a knife rest mechanism (6) is installed on the workbench. The invention realizes the rough and finish machining of the knife-scissor arc surface in one clamping, effectively shortens the machining time, reduces the labor intensity, reduces the labor cost, and improves the work efficiency and economic benefits.

Description

A CNC double-head single-sided special grinding machine for grinding knives and scissors

the

technical field

The invention belongs to the technical field of CNC special combined machine tools, and in particular relates to a special CNC double power head combined grinder for efficient and high-precision grinding of knives and scissors, mainly using different grinding wheel grain sizes of the double power heads to solve the problem of high-efficiency grinding of household knives and scissors When one clamping completes the rough and fine grinding of one side, realizes the unification of the reference, eliminates the positioning error of the second clamping, reduces the number of clamping, improves the processing efficiency and the precision of the processing surface, and adopts the double power head structure and other processing technology problems.

Background technique

In recent years, the hardware industry of knives and scissors has developed greatly, and the export trade volume is increasing year by year. According to statistics in 2012, there are about 3,000 enterprises engaged in the production of knives and scissors in my country, and the annual gross industrial output value of knives and scissors is about 100. 100 million yuan, and the annual foreign exchange earning from export exceeds 400 million US dollars. Daily-use hardware products such as kitchen knives, knife sets, pocket knives, ceramic knives, industrial scissors, civil scissors, tailor scissors, etc., must have a relatively high hardness to achieve their sharpness and durability, so most of them have to be sharpened by grinding. The cutting process is used to meet the sharpness requirements, geometric size requirements and appearance requirements of the shearing surface and cutting edge. However, in the international market, my country's knives and scissors are mainly low-end and low-value-added products. So far, there has not been a world-renowned brand of knives and scissors like Germany's "Zwilling" and Japan's "Zhuangshanlang". The most fundamental reason for the gap is product quality.

At present, the processing equipment for the main knife surface of household knives and scissors is a single-sided grinder. However, whether the current grinding machines for knives and scissors are domestically produced or imported, whether they are traditional hydraulic or newly developed numerical control, they are all single-power head grinders, and their production processes are nothing more than: one is in the same The table grinder adopts the work table to move back and forth twice to realize rough and fine grinding, which is equivalent to completing rough and fine grinding on the same grinding wheel, and the precision of the grinding surface is naturally not high; the other is to use two machine tools with different grain sizes The grinding wheel is used to achieve rough and fine grinding through two workpiece installations. Although this can improve the roughness of the grinding surface, it is difficult to ensure the dimensional accuracy of the grinding surface due to the two clampings, and the processing efficiency is low. Therefore, it is very important to develop a CNC double-head single-sided special grinding machine for grinding knives and scissors with high efficiency and high precision.

Contents of the invention

The purpose of the present invention is to overcome the limitations and deficiencies of the existing technology, and provide a double-head single-grinding CNC double-head single-grinding machine suitable for grinding knives and scissors of various specifications and materials with double-grinding structure, fast clamping, and high positioning accuracy. Surface-specific CNC machine tools.

The present invention provides a CNC double-head single-sided special grinding machine for grinding knives and scissors. One side of the frame is equipped with a double-spindle assembly along the X-axis. Belt pulley; the upper surface of the frame is equipped with a lower seat that can move along the X axis, and a middle slide seat that can move along the Z axis is installed on the lower seat, and an upper slide seat that can move along the X axis is installed on the upper surface of the middle slide seat. A workbench is installed on the sliding seat, and a knife rest mechanism is installed on the workbench.

Among the above, the tool holder mechanism is adjustable, one end is hinged to the workbench through the hinge shaft, and the other end is installed in the chute on the workbench through the lock pin, and the elastic handle with the lock pin is installed; the shaft of the two sets of spindle assemblies The centers are located on the same horizontal plane, placed in parallel with equal heights, and the rough and finish grinding wheels are respectively installed on the two grinding wheel head frames.

The beneficial effects of the present invention are:

It realizes the rough and finish machining of the knife-scissor arc surface in one clamping, improves the machining efficiency, and solves the problems of low machining efficiency, high cost, and low surface machining accuracy of the knife-scissors. Effectively shorten the processing time, reduce labor intensity, reduce labor costs, improve work efficiency and economic benefits.

It realizes rough and finishing grinding in one clamping, reduces the clamping times of the workpiece, improves the clamping and positioning accuracy, and has high processing efficiency. The purpose of high-precision and high-efficiency grinding has been achieved.

It has successfully achieved high-speed, high-efficiency, and high-precision grinding with a spindle speed of 4000r/min, a grinding depth of 0.4mm/knife, a positioning accuracy of 0.002mm, and 40-50s/piece.

Description of drawings

Fig. 1 is a front view of the present invention.

Figure 2 is a side view of the present invention.

Figure 3 is a top view of the present invention.

Fig. 4 is a schematic diagram of the connection of the knife rest mechanism of the present invention.

Detailed ways

Referring to Figures 1 to 4, the present invention provides a CNC double-head single-sided special grinding machine for grinding knives and scissors. One side of the frame 1 is equipped with a double-spindle assembly along the X-axis, and the front end of each set of spindle assembly 8 is equipped with a grinding wheel head frame. 7. The rear end is connected with a pulley 9 driven by a motor 10 through a belt; the upper surface of the frame 1 is equipped with a sliding seat 2 that can move along the X axis, and a middle sliding seat 3 that can move along the Z axis is installed on the lower seat 2. The upper surface of the slide seat 3 is installed with an upper slide seat 4 that can move along the X axis. A workbench 5 is installed on the upper slide seat 4. A knife rest mechanism 6 is installed on the workbench 5. A knife rest 18 is installed on the knife rest mechanism 6. A knife seat clamping plate 19 is installed on the knife seat 18 . Wherein, the main shaft assembly 8 is installed on the main shaft assembly support 12 , and the motor 10 is installed on the motor support 11 .

The knife rest mechanism 6 is adjustable, one end is hinged with the workbench 5 through the hinge shaft 20, the other end is installed in the chute 16 on the workbench 5 through the lock pin 21, and the elastic handle 17 with the lock pin 21 is installed, loose Open the elastic handle 17, the tool holder mechanism 6 can swing around the horizontal plane, so that the grinding angle can be adjusted. At the same time, the tool holder 18 is fixed on the rotating anti-backlash mechanism and can rotate with the rotating shaft. The rotating shaft is connected to the servo motor through the anti-backlash transmission mechanism , the tool post can be rotated around the tool post axis through servo control. The axes of the double-spindle assembly are located on the same horizontal plane, placed in parallel with equal heights, and the rough and finishing grinding wheels are respectively installed on the two grinding wheel head frames 7 .

The lower slide 2 is controlled by the lower slide servo motor driver 14, the middle slide 3 is controlled by the middle slide servo motor drive 13, and the upper slide 4 is controlled by the upper slide servo motor drive 15, which can control its linear movement respectively.

During tool grinding, the tool is installed on the tool seat, and the feed control of the grinding depth is realized by the Z-axis movement of the middle slide seat; the main grinding feed movement is realized by the X-axis movement of the upper slide seat; the swing of the tool seat The rotation of the rotation axis and the rotation axis realizes the controlled grinding of the tool surface; the rapid movement of the lower seat realizes the transfer of the tool from the grinding of one grinding wheel to the grinding of another grinding wheel, and achieves the roughness of the tool on the same machine tool. Fine grinding process.

The CNC system selects the 980T CNC system produced by Guangdong Guangzhou CNC Equipment Co., Ltd. to realize the digital control function of the machine tool.

Application example one:

Now take Guangdong Yinying Industrial Group Co., Ltd. to use the present invention: a kind of high-efficiency and high-precision CNC double-head single-sided special grinding machine for grinding knives and scissors as an example to illustrate the specific application of the present invention. The company uses this special CNC grinding machine to grind the arc surfaces of household knives and scissors.

The processing procedure of household knives and scissors is: firstly process the datum plane, position it with the datum plane, clamp it with a special fixture, place it on the workbench of the CNC double-headed single-sided special grinder for grinding knives and scissors, and compile the processing program . When the machine tool is working:

Start the machine tool, input the processing program on the CNC system, check and simulate the processing program, return the machine tool to the origin, set the tool, and establish the processing origin of the part. The process of processing the workpiece is shown as sequential grinding, first rough grinding the arc surface, the CNC system issues an execution command, the servo system drives the feed actuator to move linearly, and the slide seat 3 in the Z-axis feed servo drive mechanism works to make the tool work. Longitudinal linear movement, X-axis feed servo drive mechanism upper slide 4 works to make the tool move in X direction, the two mechanisms and the rotary anti-backlash mechanism 6 act at the same time to achieve grinding arc surface cutting. After the rough machining is completed, the rapid movement of the lower seat 2 realizes the grinding work of the tool from one grinding wheel to another grinding wheel, so that the rough and fine grinding process of the tool can be realized on the same machine tool.

The processing effect is as follows: the surface roughness of the inner arc surface can reach Ra0.2-0.4, the surface is smooth, without any knife marks. The completion time of each workpiece is 40-50s, achieving the purpose of high efficiency and high precision.

Claims (3)

1. the digital-control two-head one side special purpose grinder that grinding cutter is cut, is characterized in that, frame (1) one side is provided with two spindle assemblies along X-axis, and each spindle assemblies (8) front end is installed the emery wheel headstock (7), and rear end is connected to by motor-driven belt pulley (9); Frame (1) upper surface is installed the lower slider (2) that can move along X-axis, lower slider (2) has been installed the middle slide (3) that can move along Z axis above, the upper surface of middle slide (3) is installed the upper saddle (4) that can move along X-axis, installment work platform (5) on upper saddle (4), mounting tool post mechanism (6) on workbench.

2. the digital-control two-head one side special purpose grinder that a kind of grinding cutter according to claim 1 is cut, it is characterized in that, cutter frame mechanism (6) is adjustable, one end is hinged by hinge (20) and workbench (5), the other end is arranged in the chute (16) on workbench (5) by lock pin (21), and the degree of tightness handle (17) of lock pin (21) is installed.

3. the digital-control two-head one side special purpose grinder that a kind of grinding cutter according to claim 1 is cut, it is characterized in that, the axle center of two cover spindle assemblies (8) is located in same level, and contour parallel placement, installs respectively Roughing and fine machining emery wheel on two emery wheel headstocks (7).

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