JPH01164559A - Removal of chips of ground member - Google Patents

Abstract

PURPOSE:To carry out the grinding work by feeding a ground member onto a grinder instantly after the completion of the machining in the foreprocess by introducing the chips at the both edges of the hollow part of the ground member which are formed in the foreprocess and adhere, into a groove extending along the longitudinal direction of the axis center from the top edge parts of the both centers which support the ground member. CONSTITUTION:Before grinding work is started after a ground member W is supported by the both cutters 1 and 2, the ground member W is revolved, with the both centers 1 and 2 in the restrained state in the revolution direction, and the chips at the both edges of the hollow part of the ground member W which are formed in the foreprocess and adhere are dropped into the grooves 1a and 2a which are extend along the axis center direction from the top edge part on the surfaces of the centers 1 and 2. Therefore, after machining in the foreprocess is completed, the ground member W can be fed onto a grinder instantly, and the chips can be removed, with the ground member W supported by the both centers 1 and 2, and the ground member W can be positioned and supported with high precision by the both centers 1 and 2, and grinding work can be carried out.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is suitable for use in a grinding machine that supports a machined workpiece at both centers and rotates it to perform grinding. This article is about how to remove chips from wood.

(Conventional technology) An example of the above-mentioned grinding machine is shown in FIG. 4(a).

fbl, (the one shown in cl is right).

This grinding machine can be used as a material to be ground, for example, as shown in Fig. 4(c).
Hollow part W3 and flange part W2 of an automobile wheel hub, etc. shown in FIG. This is for grinding the outer peripheral surface of a workpiece W having a bolt hole W1, and both centers 10.20 support both ends of the hollow part of the workpiece W, and when the workpiece Wt is supported by these two centers 10.20, Right center 20t in the diagram
- Workpiece Wt = both centers 10 by pushing it to the workpiece W side
．． The hydraulically actuated tailstock 6 supported by 20 and the kelet 3 of the spindle face plate 4 located on the left center 10 side in the figure are rotated to engage the kelet 3 with the bolt hole W1 of the workpiece W, and the workpiece W''k A grindstone head 5 equipped with an electric motor 8 for rotating, a grinding wheel 9 for grinding the outer periphery of the work W after the work W has been rotated, and an electric motor 11 for rotating the grinding wheel 9.
and? It will be equipped.

Note that 7 is a cutting water supply pipe.

In addition, this grinding machine uses a so-called double-stop center-one-way system in which both centers 10 and 20 are fixed and the workpiece Wi is rotated, and is characterized by high rotation accuracy. have.

In such a grinding machine, as mentioned above, both centers 10
．． Grinding by fixing 20i and rotating workpiece W by Kelley 3? Because it is a method to perform
This will impair the positioning accuracy of the workpiece W, and furthermore, the workpiece W will be damaged at this location, reducing the quality of the product.

Therefore, in order to obtain a high-quality product, workers must carefully blow the hollow part of the workpiece W with air or rinse it with cutting water before grinding it with a grinder, which requires a great deal of labor and money. is the current situation.

(Problem to be solved by the invention) However, as mentioned above, in order to carefully remove all the chips from the hollow part of the workpiece that have adhered during the pre-processing process, the worker must spend a great deal of effort in the designated work area. Since the removal of chips was then carried out, the set-up time was very long and productivity was significantly reduced.

In view of the above points, the present invention provides a method that advantageously solves all the problems of the conventional method for removing chips from a workpiece.

(Ninth Means for Solving the Problems) In this invention, after a predetermined machining process has been carried out in the previous process and both ends of the hollow part of the material to be ground are supported at both centers, the material to be ground is rotated around the axis. When performing the grinding process by rotating, after the workpiece is supported by both the centers and before starting the grinding process, the workpiece is rotated with both centers restrained in the rotational direction. , Chips generated and attached in the pre-machining process at both ends of the hollow part of the to-be-ground material are removed into grooves formed on the surfaces of the two centers and extending from the tips of the two centers along the longitudinal direction of the shaft center. This is a method for removing chips from the material to be ground, which is completely characterized by dropping.

(Function) According to this method, after the workpiece is fully supported by both centers and before grinding is started, the workpiece is rotated with both centers restrained in the rotational direction, and the pre-processing step is performed. Chips generated and attached at both ends of the hollow part of the material to be ground are caused to fall into grooves formed on the surfaces of the two centers and extending from the tips of the two centers along the longitudinal direction of the shaft center. A friend told me that after the machining process in the previous process is completed, the workpiece can be completely loaded into the grinder immediately, chips can be removed while the workpiece is fully supported at both centers, and the workpiece can be ground with precision at both centers. Grinding can be performed by positioning and supporting the material, and when finishing machining, it is supported at both centers and produces a high quality product without causing any damage to the material.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail based on all the drawings.

FIG. 1 is a configuration diagram illustrating a grinding machine used for carrying out the present invention, and the grinding machine shown in this figure has a configuration similar to that of the grinding machine shown in FIG. 4 except for the shape of both centers in area A. become completely blind. Therefore, parts similar to those shown in FIG. The workpiece W as the material to be ground is supported by a stop center, and the workpiece Wvi is rotated by the Keret 3 for grinding. In particular, in the embodiment of this invention, the center shape has a unique feature that has not been seen before. There is.

To explain this below with reference to FIG.
, 2a are formed, and during the grinding process, it becomes possible to drop the chips 30 that have adhered to both ends of the hollow part of the workpiece in the pre-processing process.

The groove shapes include a groove 1a that extends linearly and has a substantially U-shaped cross section as shown in FIG. 1, a groove 1c that has a tapered cross section as shown in FIG. A plurality of grooves 1d as shown in FIG. 3(e), a spirally extending groove 10 shown in FIG. Although the left center 1 is shown in c), the right side also has a similar shape.) The procedure for performing grinding using the grinding machine having the above center shape will be described below.

First, a workpiece Wt which has been subjected to a predetermined machining process, such as cutting, is brought to a grinding machine, and when this workpiece is pressed against the WI center 1 side, the center 2 is moved to the workpiece W side using a conventional tailstock 6 which is operated by hydraulic pressure. move forward to

Next, the spindle face plate 4 begins to rotate 2 in the X direction, and the celery 3 falls into the bolt hole W1 of the workpiece W, completing positioning in the rotational direction.

Furthermore, the kelly 3 rotates several times, and in the previous process, the hollow part W of the workpiece W is
3, the attached chips 30 fall into the grooves 1a and 2a provided in the center 1 and the center 2, and as shown in FIG.
From this, the state becomes as shown in FIG. 2 (bl).

The positions of both centers 1 and 2 and the workpiece W are secured, and the rotation is stopped.

Next, the center 2 is further advanced by the tailstock 6, and when the axial positioning of the workpiece W is completed, the kelly 3 of the main spindle face plate 4 rotated by the motor 8 rotates the workpiece W'fr, and the cutting water is supplied from the cutting water discharge device 7. The grindstone 9 moves forward while discharging the powder, and polishing begins. Here center 1 and center 2
Set in f”-ft groove 1 a.

2a has the effect of evenly supplying cutting water to the surface of the entire center 1.2 to provide a lubricating effect, suppressing wear, preventing vibrations and abnormal noises, and efficiently flushing away chips from the grooves.

When the polishing is completed, the grinding wheel 9 is moved back, and the center 2 is also moved back, and the workpiece W is separated from both the centers 1 and 2, and the support is released.

(Effects of the Invention) According to the method of the present invention, after fully supporting the workpiece at both centers and before starting the grinding process, both centers are restrained in the rotational direction and the workpiece is When the material is rotated, chips generated during the pre-processing process [-Cuts attached to both ends of the hollow part of the material to be ground? , j”)・J Marking Both centers are formed on the surface and are inserted into grooves extending from the tips of both centers along the longitudinal direction of the shaft center, so the machining process in the previous process After finishing, the material to be ground can be immediately put into the grinding machine without removing the chips attached to the hollow part of the material to be ground, and it is supported at both centers and the chips are removed as much as possible. Accuracy (Grinding can be performed by positioning and supporting the material to be ground, so the setup time is very short, and when the grinding process is completed, it is supported at both centers and there is no damage to the other parts, resulting in a high quality product.) Can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of the main parts of an example of a grinding machine for carrying out the entire method of the present invention. FIGS. 2(a) and 2(b) are front explanatory views of the main parts of the invention, using the grinding machine shown in FIG. 1 to explain the invention in detail. FIGS. 3(a), 3(b), and 3(c) are perspective explanatory views illustrating all other embodiments of the center shape shown in FIG. Fig. 4 (al is a plan explanatory view showing a conventional grinding machine. Fig. 4 (b) is a front explanatory view of Fig. 4 (a). Fig. 4 (cl is an explanatory plan view of the workpiece as the material to be ground. Perspective explanatory view. 1, 2-... Center, la, 2a, lc, ld. 1e... Groove, 3... Keret, 4... Main shaft face plate, W
...Work (material to be ground), 9...Wheelstone. Patent applicant: Nissan Motor Co., Ltd. Fig. 1 12: 9-3 months L-4: The main shaft is a plate W, 1-tsu. Figure 3 (a) z (b) (c)

Claims (1)

[Claims] 1. After supporting both ends of the hollow part of the workpiece, which has been machined in a predetermined manner in the previous process, at both centers, the workpiece is rotated around its axis to perform the grinding process. After the material is supported by both centers and before starting the grinding process, the material to be ground is rotated with both centers restrained in the rotational direction, and the material to be ground that has been generated and adhered in the previous processing step is removed. Chips from both ends of the hollow part of the material are dropped into grooves formed on the surfaces of the two centers and extending from the tips of the centers along the longitudinal direction of the shaft center. Removal method.