JPS60232818A - Broaching device - Google Patents

Abstract

PURPOSE:To work a groove with high accuracy and satisfactory surface roughness in a workpiece by mounting a grinding wheel on a broach and depressing it with the broach having the end blade for rough machining and the base blade for finishing. CONSTITUTION:A blade 1 having the end portion for rough machining and the base portion for finishing is fixed to a holder 2 inserting groove by a screw together with a grinding wheel 8 mounted on the upper portion. A work 4 is located and mounted on lower broach guide 17 and held by a holding plate 15. The work is worked by guiding a broach 3 along the broach guides 13, 17 with a hydraulic mechanism 7, while being depressed. The working portion of the work is lap finished by the grinding wheel 8 while the broach 3 is pulled up.

Description

[Detailed description of the invention] The present invention relates to a broaching device.

There are two types of broaching machines of this type: a tension broaching machine that processes a workpiece by pulling a broach, and a push broaching machine that processes a workpiece by pushing a broach.
types are known.

However, at present, tension plates that are pulled by hydraulic mechanisms, screw mechanisms, etc. are often used.

The reason for this is that in the case of a tension broach, the base of the prowl is supported by the support part and the tip of the broach is gripped by a chuck and pulled, so there is less warpage and deformation of the broach due to cutting resistance, etc. This is because it has the advantage of being able to be processed using

However, in the case of a tension broach, when machining a closed-loop hole, first pass the tip of the broach through the closed-loop hole, then push the tip with a tension chuck, release the support chuck, and pull the The broaching chuck performs tension broaching while gripping the broach, removes the workpiece after machining, moves the broach back, releases the tensioning chuck, and grips the broach with the return chuck installed on the support. Since it is returned to its original position by the support part,
The machining cycle time becomes longer due to the gripping operation of the chuck, which makes it difficult to increase the speed.

The present invention aims to provide a broaching device that can eliminate these disadvantages.

Hereinafter, the gist of the present invention will be explained with reference to the accompanying drawings.

This device processes grooves (5) in a workpiece (4) using a broach (3) with a plurality of blades (1) attached in parallel to the holder (2) of the broach (3). ) to the base of the support part (682), and attach the base of the support part (6)
The workpiece (4) is arranged in front of the tip S of the cough proach (3), and the plurality of blades (1) of the broach (3) ) to the brooch (3
), and a grindstone (8) for finishing the grooves (5), etc. of the workpiece (4) is provided at the base of the holder (2) of the broach (3). This is a broaching device characterized by the following.

Further, this example will be specifically explained.

In this embodiment, a groove (5) in a workpiece (4) is machined.

In addition, in this embodiment, the machine body aQ is set upright on the machine stand (9), and the hydraulic mechanism (power) is installed in this 4-hole, and the slide I is arranged in the front part of the machine body so that it can slide up and down. , Attach the support part (6) on this slide L old second.

The base of the holder (2) of the blow 'f (3) is attached to this support part (6), the bracket 4 is attached to the machine base (9), and the upper approach guide is attached to this bracket (2). A holding cylinder (141) is formed on the bracket 4, a work holding plate α4 is arranged on the bracket so that it can slide up and down, and the rod of the holding cylinder (14) is connected to this work holding plate (to). Furthermore, the brooch (3
) Attach the same lower approach guide on the machine base (9) at the lower position of ), attach a positioning pin holder to this lower broach guide CL7), and use this positioning pin holder to position the workpiece (4) on the lower broach guide a7). I'm trying to place it there.

In addition, an ejection hole α is formed on the side of the podium (9), and high-pressure cutting oil is ejected from this ejection hole 11 into the relief hole (end) of the lower approach guide (17) to break the adhesion of the broach (3). It cleans the powder and lubricates it to prevent holes in the workpiece (4) from forming due to chips.

Moreover, as shown in FIGS. 2 and 3, the broach (3) of this embodiment has a fitting groove υ formed in the holder (2), and a plurality of plate-shaped blades (1) formed in the fitting mc+JJ. They are inserted in parallel, and are attached by pressing and threading 4.

In addition, the blade (1) is a blade at the tip of the blow t (3) (IJ is for rough finishing, and the blade at the base is for finishing) so that the workpiece (41) can be machined when the blow f (3) is pushed. It has become.

Further, the grindstone (8) of this embodiment is sanded by the insertion groove Qυ and the push screw C'4 in the same way as the blade (1).
8) uses a so-called electric grindstone.

Since the present embodiment has the above-mentioned configuration, the workpiece (4) is positioned and placed on the lower broach guide CL7), the workpiece (4) is temporarily held by the workpiece presser, and the broach (3) is pressed down by the hydraulic mechanism (7). The workpiece (4) can be processed by pressing and moving while being guided by the upper and lower broach guides (14αη).

After processing, the broach (3) is pulled up and moved by the hydraulic mechanism (force).

By this pushing and pulling up and down movement, the grindstone (8) finishes the groove (5) of the workpiece (4) and finishes the groove (5) with perfect precision and good surface roughness.

As described above, the present invention is characterized in that the base of the holder (2) of the proach (3) is attached to the support part (6), and the support part (6) is disposed so as to be freely pushed and pulled by a hydraulic mechanism (force etc.). The workpiece (4) is placed in front of the tip of the proach (3), and the blow F
Since the plurality of blades (1) in (3) are configured to process the workpiece (4) when the proach (3) is pushed,
The workpiece (4) can be proached simply by pushing and pulling the proach (3), that is, without changing the heel.
This makes it possible to speed up the grinding process, thereby increasing efficiency.Furthermore, a grindstone (8) for finishing the grooves (5) of the workpiece (4), etc. can be installed at the base of the holder (2) of the proach (3). Since it is arranged, when the prong (3) is pushed or pulled,
The grinding wheel (8) has a highly precise finish on the machined surfaces such as the grooves (5), and the blade (1) does not cause any scratches such as scratches (5), especially when it is being moved. Can be done.

As described above, the intended purpose can be fully achieved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view, FIG. 2 is a perspective view of a main part, the third factor is a m sectional view thereof, and No. 41ffi is a partial cross sectional view. (1)...Blade, (2)...Holder, (3)...Proach, (4)...Workpiece, (5)...Groove, (6)...Support, (Force...Hydraulic mechanism, (8),...Whetstone. April 10, 1980 Applicant: Sanjo Machinery Co., Ltd. Inventor: Mitsuru Odashima

Claims (1)

[Claims] When machining grooves in a workpiece using a broach with a plurality of blades attached in parallel to a holder, the base support part of the holder of the broach is installed, and the support part is arranged so that it can be pushed and pulled freely by a hydraulic mechanism, etc. the front end of the broach (2) the workpiece is disposed, and the plurality of blades of the broach are configured to process the workpiece when the broach is pushed;
A broaching device 0 characterized in that a grindstone for finishing grooves, etc. of the workpiece is disposed at the base of the holder of the front HD proach.