JPS62271700A - Deburring method and device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention provides a method for removing curls from a workpiece by spraying an air jet mixed with particles onto the workpiece, and @
■Regarding.

[Prior art and its problems] Such a method is known and actually used. However, these methods have drawbacks.

This means that complex structural components with internally arranged full or blind holes etc. can only be processed to an insufficient extent. Furthermore, when using this method, residual debris or dirt particles may impinge on the workpiece together with the granular pellets, impairing the functionality of the workpiece.

Similar drawbacks arise from the similarly known thermal deburring process.
ess) also occurs. Also, this method requires costly pre- and post-treatments. Furthermore, this heat curling is unsuitable for various materials, especially for hardened parts.

Furthermore, conventional burr removal by chemical or electrochemical means
nga+electrochei+tca+de-bur
ring) has similar drawbacks. Chemical removal is inappropriate for precisely machined parts;
Removal of curls by electrochemical means is not suitable for gifted parts of flags or curls, and moreover can only be used with special materials. Deburring by mechanical means and manual deburring are very time consuming, expensive and imprecise. When using these methods of removing burrs, not all burrs are detected and new burrs may be generated by the tool during the removal of burrs, so a 100% complete check is required.

The present invention improves upon the conventional deburring methods and apparatus described above and provides a method and method capable of dealing with workpieces that require a high degree of cleanliness and require minimal contamination.
The purpose is to provide learning.

[Means, actions and effects for solving problems! ] The workpiece stripping method according to the invention is applicable to all parts requiring a high degree of cleanliness and minimal residual soiling. In a particularly preferred method, sections with ridges or bulges of various sizes and internally disposed grooves or! 71. It can likewise be used for complex parts with This method significantly reduces excessive chips or foreign matter that is particularly prone to becoming clogged within the blind hole.

In an advantageous embodiment of the invention, the workpiece is pressure cleaned after the high pressure shot blasting step. This makes the method of the invention more efficient and can process workpieces similar to those required to meet maximum cleanliness.

It has been found to be particularly advantageous if the method is carried out simultaneously at several locations with several high pressures and cleaning jets. This reduces processing time. Preferably, the high pressure blasting step is carried out in a pulsed or intermittent manner.

The workpiece bulging lIw according to the invention comprises a first rumen having a workpiece holder arranged with at least one, in particular a plurality of ejectors, for supplying a particle-laden air jet.

In an advantageous embodiment of the device according to the invention, the ejector comprises mixing means for mixing the particles into the air jet. Furthermore,
The ejector comprises ejection nozzles of various shapes, in particular flat cross-sectional shapes, conical shapes and circular shapes. Thereby, various curved portions can also be suitably processed.

According to another preferred embodiment of the invention, a high pressure shot blasting and cleaning apparatus, a workpiece and holder, and a high pressure fluid supply system are provided.

Thereby, the workpiece holder of the pressure sicot blasting device is provided with at least one mandrel for accommodating the workpiece. It is particularly advantageous if the mandrel includes high pressure and cleaning fluid supply channels, respectively. This allows high pressure or cleaning fluid to be discharged through the mandrel and the supply channels contained therein. The feed channel may include any suitable number of branch channels. Advantageously, the mandrel further cooperates with a fluid drainage groove.

According to a further embodiment of the present invention, a cover s for an opening provided in a beam piece of a high pressure shot blasting apparatus is provided.
Equipped with vi. These H-bar members partially or completely fill the opening, which makes it possible to correspondingly direct high pressure or cleaning jets into the workpiece.

In a further preferred embodiment, the high pressure shot blasting device is provided with a control mechanism comprising a valve. These valves are actuated by the electronic tiI1m device in such a way that a corresponding high-pressure cleaning jet is ejected.

The invention is particularly advantageous in that excessive particles are excluded from the workpiece being treated.

Remains of curls, fine curls, oxide layer, graphite ■
and silicon, etc. layers are 100% eliminated. Curved areas and areas that cannot be directly reached are largely eliminated.

Even when the finished surface is not hardened, it is possible to eliminate curls and minute curls caused by grinding. The method according to the invention allows various roundings to be carried out depending on the specifications of the workpiece.

EXAMPLE FIG. 1 shows a workpiece 2 which is provided with a plurality of hollow spaces or bores extending in different directions. The boats of the inner holes of this workpiece are marked 4.6, 8.10, respectively.
12.14 is attached. Each of these bore boats has one ejector 16.18, 20.22.24.26
is placed. These ejectors have similar construction, differing only in the use of different nozzles. Therefore, only the construction of the ejector 24 will be described in detail below. This ejector 24 comprises a holder 28 forming a mixing chamber 30 into which a first tube 32 extends, through which compressed air is supplied.

At an acute angle thereto a second tube 34 extends into the mixing chamber 30 and is fed with particles such as glass, nut shells or granular graphite. The nozzle 36 is inserted into the front part of the holder 28, and in this embodiment is formed as a jet nozzle with a circular cross section. The ejector 16 has a cone-type jet nozzle 38, and the nozzle 4 of the ejector 20
0 has a cylindrical boat. In this arrangement, the shape of the nozzle is shown in the bulge to be treated.

The workpiece 2 is treated with a dry air jet containing particles in the apparatus shown in FIG.

The ejectors 16, 18, 20.22.24.26 are aimed exactly at the bulge to be treated and thus ensure reliable treatment. This ejector is designed to act on a variety of workpieces, so it is possible to use a machine II (shown in Figure 3) in which each ejector can be operated individually.
are provided, so that the air pressure and the blasting interval can be individually controlled if required. A plurality of ejectors or jet nozzles can be arranged in a relatively small space without interfering with each other.

In this case, this is particularly achieved by arranging the nozzles such that none of the nozzles shadows the other nozzles.

FIG. 2 shows a workpiece 2 that has been pretreated in the apparatus according to FIG. 1 and is accommodated and held in a high-pressure shot blasting apparatus @42. This high-pressure shot blasting device *42 comprises two parallel mandrels 44,46, the front parts of which are inserted and held in the hollow space of the workpiece 2.

More than two mandrels or only one mandrel may be used if desired, depending on the shape of each workpiece being processed. Mandrel 44 is longer than mandrel 46 and extends completely through workpiece 2. Each mandrel 44.46 comprises a respective holding part 48.50 and a carrier part 52.54. The diameter of the holding part 48.50 is designed to be larger than the carrier part 52.54 and thus the annular surface 56.58 formed at the transition from the holding part to the carrier part.

This annular surface 56.58 faces the end face forming the bore of the workpiece and abuts when the carrier part 52.54 is inserted into the bore of the corresponding workpiece. Each mandrel 44.46 includes a pressure fluid boat 60.62 which is arranged radially in the holding part 48.50 and in which there is in each case a main groove 64 for one pressure fluid.
．． 66 will be extended. From these main pressure fluid grooves 64 and 66, one radially extending portion 68 is formed.
．． 70 and an axially extending portion 72, 74 of 1 diverge. These axially extending portions 72,74
is placed eccentrically with respect to the center line. radially extending portion 68°70 and axially extending portion 7
A plurality of grooves branch out from 2.74, and these jet nozzles, namely nozzles 76.78.80.82.84.86
are combined. These nozzles are mandrel 44
．． 46 is positioned proximate the location to be processed when inserted into the workpiece. The nozzles are preferably screwed into corresponding locations on the mandrel and extend radially, axially or obliquely depending on the location of the part to be treated. The front end of the mandrel 44 has a guiding projection 88 that projects from the housing.

The reaction member 90,92 is spaced at a small distance of about 1-2 with respect to the housing opening from which the guide projection 88 projects and the housing opening of the radially extending bore. In this embodiment, the reaction member 90 includes a recess 94,
A guide projection 88 of the mandrel 44 is arranged within this recess. The carrier part 52,54 of the mandrel is formed in a stepped structure corresponding to the shape of the housing. In a suitable embodiment, the workpiece is divided into two or more chambers. One mandrel is placed within each chamber.

Boats 96.98 are also provided in the holding part 48.50, in which collection lines 100.102 are installed.
will be extended. These collection conduits 100, 102 have a radially extending portion and an axially extending portion, the axially extending portions 104, 106 forming boats, these boats being connected to the housing. At least a portion is disposed within the cross-section of the opening of No. 2. A mandrel is inserted into the interior through an opening in this housing, so that the pressure fluid is discharged via collection line 100.102.

FIG. 3 shows a schematic cross-sectional view of a workpiece deburring device. Workpiece 2 is mandrel 4
It is held at 4.46. Nozzle Lure 6.78.80,
82, 84, 86 do not represent actual locations, but are shown schematically.

The same applies to collection lines 100, 102.

A check valve 110 and a filter 112 are removed from a tank 108 containing approximately 3 cubic meters of fluid (water/emulsion).
Pump 114 (220 bar, 32β/■in) in which a pipe line with (30μ) is driven by a motor
It has been extended to From this pump, there are two pipes 1
16.118 extends to the pressure fluid boat 60.62. Each of the lines 116 and 118 is provided with two-way, two-position directional control valves 120, 122, which are electromagnetically actuated. Pipeline 124゜1
26 is a filter from boat 96.98 (70 μn 128
．． 130, throttle 132, 134, 2 U-I 2
position control - collection line 14 via valves 136, 138;
0, and this collection line 140 extends to the front side of the filter 112 in the line that extends to the pump. Another tank 142 contains approximately 500 liters of fluid. Filter (100μ) 144 and motor-driven pump 146 (117bar, 170Q/sin)
is inserted into the conduit 144.

Next, the operation of the curl removing device shown in FIG. 3 will be explained.

The workpiece 2 is placed on the mandrel 44.46, the reaction member 90.92 is placed in a position where the outlet is not completely blocked, and the pump 114 is activated. Valve 120,1
22 is opened at the same distance for about 5 to 30 seconds. The workpiece is then sealed by bringing the reaction members 90,92 closer together. After this, all valves 12o.

122.136.138 is opened for almost 5 seconds. Then, while valves 120, 138 are open and valves 122,136 are closed, other steps are initiated. This action lasts about 5 seconds 1Il
l@ri. After this, valves 122 and 136 are opened for 5 seconds, and valve 1
The action corresponding to the question in which 20.138 is closed is performed. This reciprocating action is repeated a predetermined number of times with blasting through valves 120, 122 and circulation cleaning through open valves 136, 138.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the invention and is a schematic illustration of an apparatus with a plurality of air/particle ejectors and a workpiece to be treated; FIG. 2 shows an embodiment of the invention; FIG. FIG. 3 is a schematic illustration showing the control mechanism of the high-pressure shot blasting and cleaning apparatus. 2... Workpiece, 16.18.20.22°24
．． 26... Ejector, 28... Holder, 30...
・Mixing chamber, 36.38.40... Nozzle, 42
...High pressure shot blasting equipment [44°46...
・Mandrel, 48.50... Holding part, 52゜54・
・Carrier part, 76.78, 80, 82° 84.86
...Ejection nozzle, 90.92...Reaction member, 12
0,122,136,138... valve.

Claims (15)

[Claims] (1) A method of blowing an air jet mixed with particles onto a workpiece to remove curls from the workpiece, and after a shot blasting process using air and particles,
A method for curling a workpiece, characterized in that, in another step, a high-pressure fluid containing at least a portion of water is sprayed onto the workpiece. (2) The method for removing curls according to claim 1, wherein a high-pressure washing step is performed after high-pressure shot blasting. (3) The method for removing curls according to claim 1 or 2, wherein the high-pressure shot blasting and high-pressure cleaning steps are performed using a plurality of shots and a cleaning jet, respectively. (4) The method for removing curls according to any one of claims 1 to 3, wherein the high-pressure shot blasting and cleaning steps are each performed in a pulsed manner, that is, intermittently. (5) A device for blowing an air jet mixed with particles onto a workpiece to deburr the workpiece, the workpiece holder being provided with a first device, the first device comprising at least one, in particular a plurality of Ejector (16, 18
, 20, 22, 24, 26), through which an air jet containing particles is supplied. (6) The ejector (16, 18, 20, 22, 24
, 26) is a mixing means (3) for mixing the particles into the air jet.
0) The curl removal device according to claim 5. (7) The ejector (16, 18, 20, 22, 24
, 26) has nozzles (36, 38, 40) of different shapes, in particular a jet nozzle with a flat cross-section, a cone-shaped jet nozzle, and a jet nozzle with a circular cross-section. The curl removing device according to item 6. (8) A second device comprising a workpiece (44, 46), a high-pressure shot blasting and cleaning device, and a high-pressure fluid supply system. A device for removing curls. (9) The workpiece of the high-pressure shot blasting device includes at least one workpiece containing the workpiece (2).
9. A deburring device according to claim 8, wherein mandrels (44, 46) are provided. 10. The burling device of claim 9, wherein the mandrel (44, 46) includes at least one feed groove (64, 66) for high pressure fluid. 11. The burling device of claim 10, wherein the mandrel (44, 46) cooperates with at least one drainage groove (100) for fluid. (12) The curl removal device according to claim 10 or 11, wherein a plurality of branch grooves branch from the supply groove (64, 66). (13) The supply grooves (64, 66) and the respective branch grooves have jet nozzles (76, 78, 80, 82, 84, 86).
) Claims 10 to 12 include:
The curl removal device according to any one of Items 1. (14) The curl removal device according to any one of claims 8 to 13, wherein the high-pressure shot blasting device includes at least one cover member for an opening provided in the workpiece. (15) The high-pressure shot blasting device is provided with a control mechanism including valves (120, 122, 136, 138). Device.