CN206567609U - The automatic compensation adjustment device of the workpiece amount of feeding in saw blade cutting processing - Google Patents

Abstract

An automatic compensation and adjustment device for workpiece feed during wire saw cutting, including a feed table and a loading table, where a positioning through hole is provided in the feed table, and a guide column is provided at the bottom of the loading table, and the loading table passes through The cooperation between the bottom guide column and the positioning through hole is installed on the feed table, and a spring device is arranged between the loading table and the feed table. Through the elastic connection between the feed table and the loading table, the device moves the loading table relative to the feeding table along the feeding direction through the spring according to the change of the sawing force, and realizes the loading table through the positioning guide device. Positioning in other directions, during the cutting process, the cutting ability of the saw wire can be matched with the feed rate of the worktable according to the contact state between the saw wire and the workpiece, so as to avoid severe wear or slicing surface caused by excessive bending of the saw wire The quality deteriorates.

Description

Automatic Compensation and Adjustment Device for Workpiece Feed Amount in Wire Saw Cutting

technical field

The utility model relates to a workpiece feeding device used for automatic adjustment of feeding amount in the process of cutting bar material by a wire saw, which belongs to the technical field of cutting processing.

Background technique

Silicon carbide (Sic) single crystal, silicon (Si) and other hard and brittle materials are widely used in various disciplines due to their excellent and stable physical and chemical properties. The bonded abrasive diamond wire saw slicing technology is more and more widely used in the crystal slicing industry due to its advantages of narrow kerf, high material removal rate, good surface quality and environmental friendliness in the slicing process of hard and brittle materials.

The existing wire saw machine tool equipment generally clamps the workpiece to be cut and processed on the feed worktable, and the saw wire reciprocates, and the movement of the feed worktable drives the material to be processed to feed in a direction perpendicular to the saw wire, or Cutting is accomplished by feeding the wire in a direction perpendicular to the material being processed while maintaining reciprocating wire travel. For hard and brittle materials such as single crystal SiC and single crystal Si, the shape of the workpiece is generally round and rod-shaped, and the length of the incision will change with the process of cutting. At the same time, the diamond wire matrix itself has the characteristics of long length and small diameter, so it is easy to bend and deform.

If the feed rate is constant during the cutting process, when the incision length is large or the saw wire is worn, due to the constant feed rate, the feed cannot be cut in time, which will cause severe bending of the saw wire. Excessive bending deformation will increase the friction between the saw wire and the workpiece, increase the wear of the saw wire, and even cause wire breakage, and will greatly reduce the surface quality of the slice. When the incision length is small, due to the small sawing force, the saw wire generally does not bend, and its cutting performance is not fully exerted.

In order to solve this problem, there is a cutting technology that adopts a process of changing the feed speed according to the sawing area during the entire cutting process, but this requires relatively high requirements for the control system of the wire sawing machine, which greatly increases the cost of the sawing machine and the technical requirements for the operator. requirements. Some sawing machines have added a saw wire swing device, which swings back and forth during the saw wire cutting process to keep the cutting length constant when sawing round rod-shaped hard and brittle materials, but adding the saw wire swing device greatly increases the manufacturing cost and control system of the saw machine complexity.

Utility model content

The utility model aims at cutting and processing circular crystal rods with a wire saw at present, due to the change of the length of the incision or the change of the cutting ability of the saw wire during the cutting process, and at the same time the feed rate is constant and the existing feed cannot be cut off in time. To solve the serious problem of wire saw wire bending, an automatic compensation and adjustment device for workpiece feed during wire saw cutting is provided.

The automatic compensation and adjustment device for workpiece feed in the wire saw cutting process of the utility model adopts the following technical solutions:

The device includes a feed table and a loading table. A positioning through hole is arranged in the feeding table, and a guide column is provided at the bottom of the loading table. On the working table, a spring device is arranged between the loading table and the feeding table.

The section of the guide column is rectangular, and the positioning through hole is also rectangular accordingly.

A positioning guide device is arranged between the guide column and the positioning through hole, two of which are oppositely arranged in each positioning through hole.

The positioning and guiding device is bow-shaped, with installation holes at the upper and lower ends, and arc-shaped protrusions on the outer surface.

The spring device is a compression spring.

Before sawing, the saw wire is tensioned and bent, and the spring device generates pre-compression when the workpiece is pressed on the loading table; when the cutting depth L of the workpiece is L≤d/4, if the cutting amount is greater than the feeding amount, the spring The pre-compression amount of the device will be reduced, and the loading table will be further fed towards the direction of the wire relative to the feed table, and the feed amount will be compensated to increase the bending angle of the wire to 5-10° to maintain the cutting of the wire. capacity, where d is the diameter of the crystal bar to be processed; when the incision depth L of the workpiece is 3d/4≤L≤d, or the saw wire is worn, causing the feed rate to be greater than the cutting amount, so that the bending angle is greater than 10°, along the The sawing pressure generated in the feeding direction of the workpiece compresses the spring device between the feeding table and the loading table, and the loading table automatically retreats relative to the saw wire to reduce the bending of the saw wire to ensure the bending angle of the saw wire ≤10°, eliminating the phenomenon that the wire cannot be cut off in time due to excessive feed rate, resulting in excessive bending of the saw wire.

The utility model makes the material loading table move relative to the feeding table along the feeding direction through the spring according to the change of the sawing force through the elastic connection between the feeding table and the loading table, and realizes the material loading through the positioning guide device. The positioning of the table in other directions can match the cutting ability of the saw wire with the feed rate of the worktable according to the contact state of the saw wire and the workpiece during the cutting process, so as to avoid serious wear or slicing caused by excessive bending of the saw wire Surface quality deteriorates.

Description of drawings

Fig. 1 is a structural schematic diagram of the automatic compensation and adjustment device for workpiece feed in the wire saw cutting process of the utility model.

Fig. 2 is a B-B sectional view in Fig. 1 .

Fig. 3 is a structural schematic diagram of the positioning and guiding device in the utility model.

In the figure: 1. Feed table, 2. Compression spring, 3. Loading table, 4. Work piece, 5. Saw wire, 6. Guide wheel, 7. Positioning guide device, 8. Mounting hole, 9. Arc raised.

detailed description

As shown in Fig. 1 and Fig. 2, the automatic compensation and adjustment device for the workpiece feed amount in the wire saw cutting process of the present utility model includes a feed table 1 and a loading table 3. Four rectangular guide posts are arranged at the bottom of the loading table 3, and four rectangular positioning through holes corresponding to the positions of the guiding posts are provided on the feed table 1, and the guiding posts at the bottom of the loading table 3 are inserted into the positioning through holes. A positioning guide device 7 is arranged between each guide column and the positioning through hole.

Two positioning guides 7 arranged oppositely are arranged in the positioning through holes of each feeding workbench 1 . The structure of a single positioning guide 7 is shown in Fig. 3, which is bow-shaped, with mounting holes 8 at the upper and lower ends, and the mounting holes 8 are in the shape of a long groove. Two arc-shaped protrusions 9 are provided on the side of the positioning guide device 7 that contacts the guide post at the bottom of the loading platform 3 . Every two positioning guides 7 are correspondingly installed in a through hole of the feed table 1 through the mounting holes 8 thereon.

The installation process of the positioning guide device 7 is as follows: two positioning guide devices 7 are placed in each positioning through hole of the feed table 1, and the arc-shaped protrusions 9 on the two positioning guide devices 7 are opposite to each other, and are inserted through the installation hole 8 Bolts, the bolts are in a half-tightened state; insert the four positioning columns of the stage 3 into the positioning through holes correspondingly, and adjust the four positioning guides close to the inner side of the feed table 1 (the inner side of each positioning through hole), so that The arc-shaped protrusion 9 is close to the side wall of the positioning column, and the upper bolt is tightened; adjust the other four positioning guide devices 7 close to the outside of the feed table so that the arc-shaped protrusion 9 is close to the side wall of the positioning column , Tighten the bolts to complete the installation. During the cutting process, the stage 3 can move relative to the feed table 1, and the arc-shaped protrusion 9 on the positioning guide device 7 is in high secondary line contact with the side wall of the positioning column. Give directions to slide freely.

A spring device is provided between the loading table 3 and the feeding table 1 , specifically, a compression spring 2 is set on each guide column of the loading table 3 . The upper and lower end surfaces of the four rectangular through holes of the feed table 1 are provided with grooves along the axial direction of the workpiece, and the positioning guide device 7 is installed on the grooves.

When the above device is in use, the workpiece 4 is fixed on the loading platform 3 , and the loading platform 3 moves along the feeding direction of the workpiece 4 on the feeding table 1 . The saw wire 5 is bent and tensioned, and an appropriate downward preload is given to the loading table 3, so that the compression spring 2 is compressed. After setting a constant feed speed, the feed table 1 moves in a direction perpendicular to the saw wire 5 (see FIG. 1 ), and the saw wire 5 is tensioned on the guide wheel 6 and reciprocates to start cutting the workpiece 4 .

When the incision depth L is small (L≤d/4, d is the diameter of the crystal bar to be processed) or the wear degree of the saw wire 5 is small (the first 3/4 period of the life of the saw wire 5), the saw wire 5 has a good cutting ability, if the cutting amount is greater than the feeding amount, the compression amount of the compression spring 2 will be reduced, and the loading table 3 will be further fed in the direction of the saw wire 5 relative to the feed table 1, so as to fully exert the power of the saw wire 5 cutting ability.

When the cutting depth L is longer (3d/4≤L≤d), or the cutting ability of the saw wire 5 decreases due to greater wear (the last 1/4 of the service life of the saw wire 5), when the cutting amount When it is less than the feed rate, because the saw wire 5 has a large bend (the bending angle of the saw wire is greater than 10°), the sawing pressure generated by it on the vertical direction of the loading table 3 increases, and at this time the compression spring 2 It will be further compressed, so that the loading table 3 is retreated away from the direction of the saw wire 5 relative to the feed table 1 (the saw wire retreat distance is 0-30mm), so that the bending angle of the saw wire 5 is kept at ≤10° (5-10mm) ° is better), to avoid the saw wire 5 from being too worn or broken, so as to maintain the cutting ability of the saw wire, realize the effect of matching the cutting ability with the feed rate, and eliminate the bending of the saw wire caused by excessive feed rate that cannot be cut off in time The phenomenon of excessive amount, and ensure the surface quality of the slice.

As shown in FIG. 1 , the bending angle of the saw wire 5 refers to the angle A between the bent state of the saw wire 5 when cutting the workpiece 4 and the initial unstressed state of the saw wire 5 .

The feed driving mode of the feed table 1 involved in the utility model and the fixing mode of the workpiece on the loading table 3 can be realized by using the prior art.

Claims (5)

1. the automatic compensation adjustment device of the workpiece amount of feeding in a kind of saw blade cutting processing, including Feed table and material carrier platform, its It is characterized in：Positioning through hole is provided with Feed table, the bottom of material carrier platform is provided with lead, and material carrier platform is oriented to by bottom The cooperation of post and positioning through hole is arranged on Feed table, and spring assembly is provided between material carrier platform and Feed table.

2. the automatic compensation adjustment device of the workpiece amount of feeding in saw blade cutting processing according to claim 1, it is characterized in that：Institute The rectangular in cross-section of lead is stated, correspondingly positioning through hole is also rectangle.

3. the automatic compensation adjustment device of the workpiece amount of feeding in saw blade cutting processing according to claim 1, it is characterized in that：Institute State and locating guide device is provided between lead and positioning through hole, two are oppositely arranged in each positioning through hole.

4. the automatic compensation adjustment device of the workpiece amount of feeding in saw blade cutting processing according to claim 3, it is characterized in that：Institute State locating guide device arched, upper and lower side carries mounting hole, lateral surface is provided with arc convex.

5. the automatic compensation adjustment device of the workpiece amount of feeding in saw blade cutting processing according to claim 1, it is characterized in that：Institute Spring assembly is stated for compression spring.