Vibratory module for a manual cutting machine, manual cutting machine, and method for improving a manual cutting machine

Abstract

The vibratory module (128) comprises: - a housing (130) intended to be non-rotatable about an axis (A) relative to a housing (116) of the micrometric stop (114); - a rotary element (132) mounted so as to be movable relative to the housing (130) about the axis (A), the rotary element (132) having an input member designed to be fixed to a rotary element (122) of the micrometric stop (114); - a vibratory element (136) mounted so as to be slidable relative to the rotary element (132) along the axis (A), the vibratory element (136) having an output member designed to be fixed to a cutting device (139); and - a vibration-inducing mechanism (140) designed to impart to the vibratory element (136) a reciprocating movement along the axis (A) relative to the rotary element (132) when this rotary element (132) is rotated about the axis (A) by the rotary element of the micrometric stop (114).

Description

VIBRATORY MODULE FOR A MANUAL CUTTING MACHINE, MANUAL CUTTING MACHINE, AND METHOD FOR IMPROVING A MANUAL CUTTING MACHINE Technical field of the invention

[0001] The present invention relates to a vibration module for a manual cutting machine, a manual cutting machine comprising such a vibration module, and a method for improving a manual cutting machine. Technological background

[0002] The Chinese patent published under number CN 10 9079203 B describes an automatic cutting machine, i.e. one in which the cutting device is advanced by a motor, comprising a vibratory module (from the English "pecking").

[0003] Such a vibratory movement makes it possible in particular to better fragment the chips, and therefore to evacuate or suck them up more efficiently.

[0004] It could be advantageous to be able to add such a vibratory movement to a manual cutting machine, i.e. requiring the strength of the operator to carry out the machining phase, in particular when this manual cutting machine is equipped with a micrometric stop.

[0005] In addition to chip fragmentation, this would make the cutting speed more consistent during drilling, and therefore improve the quality of drilling in order to reduce the drilling cascades necessary to produce a finished hole. In addition, this would reduce the effort required, and therefore reduce musculoskeletal disorders for operators.

[0006] However, the vibratory module described in patent CN 10 9079203 B is not compatible with a manual cutting machine. Indeed, this vibratory module comprises a vibratory element and a vibration mechanism designed to give the vibratory element a reciprocating vibratory movement during its rotation. This vibratory module is designed to be mounted at the rear end of the shaft carrying the cutting tool, by screwing the vibratory element into this rear end in order to transmit the vibratory movement to the cutting tool. However, in a manual cutting machine, the rear end of the shaft carrying the cutting tool is located in the housing, where it is connected to the motor of the cutting machine. The rear end is therefore not accessible for mounting the vibratory module known from patent CN 10 9079203 B.

[0007] It may therefore be desirable to provide a vibratory module compatible with a manual cutting machine with a micrometric stop.

[0008] There is therefore proposed a vibratory module for a manual cutting machine with a micrometric stop, characterized in that it comprises: a housing intended to be fixed in rotation around an axis relative to a housing of the micrometric stop; a rotating element mounted to move, relative to the housing, around the axis, the rotating element having an input member designed to be fixed to a rotating element of the micrometric stop; a vibratory element mounted to slide, relative to the rotating element, along the axis, the vibratory element having an output member designed to be fixed to a cutting device; and a vibration mechanism designed to give the vibratory element a reciprocating movement along the axis relative to the rotating element, when this rotating element is driven in rotation around the axis by the rotating element of the micrometric stop.

[0009] The invention may further comprise one or more of the following optional features, in any technically possible combination.

[0010] Optionally, the output member has a threaded output opening for receiving a threaded input shaft of the cutting device.

[0011] Also optionally, the input member has a threaded input shaft.

[0012] Optionally also, the input organ and the output organ are complementary to each other.

[0013] Also optionally, the vibration mechanism comprises rolling elements, such as balls, interposed between two annular surfaces, transverse to the axis, one belonging to the housing of the vibratory module and the other to the vibratory element, at least one of these annular surfaces having a relief.

[0014] There is also provided a manual cutting machine comprising:a main body comprising:a housing having a handle designed to be grasped by a human operator in order to maneuver the manual cutting machine,a motor fixed to the housing, andan output member driven by the motor;a micrometric stop mounted on the output member and having an output member; anda cutting device designed to be mounted on the output member of the micrometric stop;characterized in that it comprises a vibratory module according to the invention, mounted on the output member of the micrometric stop, in place of the cutting device, and in that the cutting device is mounted on the output member of the vibratory module.

[0015] Optionally, the micrometric stop comprises a housing and a base extending around the axis and mounted axially movable on the housing, but fixed in rotation around the axis relative to the housing, and the vibratory module comprises an anti-rotation stop fixed to the housing of the vibratory module and extending into a lateral opening provided in the base.

[0016] A method of improving a manual cutting machine is also proposed to obtain a manual cutting machine according to the invention, comprising: mounting the vibratory module on the output member of the micrometric stop, in place of the cutting device; and mounting the cutting device on the output member of the vibratory module. Brief description of the figures

[0017] The invention will be better understood with the aid of the following description, given solely by way of example and with reference to the appended drawings in which:is a side sectional view of an example of a manual cutting machine according to the invention,is a block diagram of a method for improving a manual cutting machine, andis a side sectional view of the manual cutting machine before improvement. Detailed description of the invention

[0018] With reference to the, an example of a manual cutting machine 100 according to the invention will now be described. This manual cutting machine 100 is in particular designed to carry out drilling operations on parts of aeronautical structures.

[0019] The manual cutting machine 100 firstly comprises a main body 102.

[0020] The main body 102 includes a housing 104 having a handle 106 adapted to be grasped by a human operator in order to maneuver the manual cutting machine 100.

[0021] The main body 102 further comprises a motor 108 fixed to the housing 104 and having a rotor 110 rotating relative to the housing 104.

[0022] The main body 102 further comprises an output member driven in rotation by the motor 108. The output member comprises, for example, an output opening 112 extending on an axis A and driven in rotation about this axis A by the motor 108, and more precisely by its rotor 110. For example, the output opening 112 is formed in the rotor 110. The output opening 112 is, for example, threaded.

[0023] The manual cutting machine 100 further comprises a micrometric stop 114.

[0024] The micrometric stop 114 comprises a housing 116 designed to be fixed to the housing 104 of the main body 102, for example by screwing. In the latter case, the housings 104, 116 thus comprise complementary threads.

[0025] The micrometric stop 114 further comprises a base 118 extending around the axis A and mounted axially movable on the housing 116, but for example fixed in rotation around the axis A relative to the housing 116. The micrometric stop 114 further comprises a rear stop (not shown) having an axial position along the axis A and blocking the base 118 towards the rear (towards the main body 102), as well as a mechanism (not shown) for micrometric adjustment of the axial position of the rear stop. Thus, by this adjustment, it is possible to precisely adjust how far the base 118 can move back relative to the housing 116. The micrometric stop 114 further preferably comprises a spring 120 for pushing the base forward (away from the main body 102).

[0026] The micrometric stop further comprises a rotary element 122 mounted to rotate about the axis A relative to the housing 116. The rotary element 122 has an input member designed to be fixed to the output member of the main body. For example, this input member comprises an input shaft 124 which is threaded in order to screw into the threaded output opening 112 of the main body 102. The rotary element 122 further comprises an output member, such as an output opening 126 for example threaded.

[0027] The manual cutting machine 100 further comprises a vibratory module 128 (from the English “pecking”), added for example in a removable manner to the micrometric stop 114.

[0028] The vibratory module 128 firstly comprises a housing 130 designed to be fixed in rotation about the axis A relative to the housing 116. For example, in the case where the base 118 is fixed in rotation about the axis A relative to the housing 116, the housing 130 can be fixed in rotation about the axis A relative to the base 118. For this, an anti-rotation stop is for example provided fixed to the housing 130 and extending into a lateral opening 131 formed in the base 118. Such openings are usually provided for the evacuation of chips. The anti-rotation stop comprises for example a screw 133 screwed into the housing 130. The lateral opening 131 is sufficiently long so that the anti-rotation stop does not hinder the axial movement of the base 118, whatever the axial position of the rear stop.

[0029] The vibratory module 128 further comprises a rotary element 132 mounted to move, relative to the housing 130, around the axis A. The rotary element 132 has an input member designed to be fixed to the output member of the micrometric stop 114. This input member comprises for example an input shaft 134 which is threaded in order to screw into the threaded output opening 126 of the micrometric stop 114.

[0030] When the rotating element 132 is rotated, the anti-rotation stop, which is in contact with an edge of the lateral opening 131, thus blocks the rotation of the housing 130 around the axis A.

[0031] The vibratory module 128 further comprises a vibratory element 136 slidably mounted on the rotary element 132, i.e. movable in translation along this axis A relative to the rotary element 132, but driven in rotation around the axis A by the rotary element 132. The vibratory element 136 has an output member, such as an output opening 138, for example threaded, in order to allow attachment of a cutting device 139.

[0032] The vibratory module 128 further comprises a vibration mechanism 140 designed to give the vibratory element 136 a back-and-forth vibratory movement along this axis A, relative to the rotary element 132, during its rotation around the axis A. The vibratory movement is generally very rapid. The vibration mechanism 140 is for example designed to make the vibratory element 136 make at least one back-and-forth movement with each rotation of the latter around the axis A. This back-and-forth movement along the axis A is of low amplitude, for example of amplitude less than 0.5 mm, preferably of amplitude between 0.1 mm and 0.2 mm. The vibration mechanism 140 comprises, for example, rolling elements, such as balls 142 or rollers, interposed between two annular surfaces 144, 146, transverse to the axis A, one 144 belonging to the housing 130 and the other 146 to the vibratory element 136.The rolling elements are thus designed to roll on these annular surfaces 144, 146 when the vibratory element 136 is driven in rotation by the rotary element 132. At least one of these annular surfaces 144, 146 then has a relief so that the vibratory element 136 advances then retreats along the axis A, sliding on the rotary element 132. The vibration mechanism 140 may further comprise a spring (not shown) designed to push the vibratory element 136 axially, for example towards the main body 102, to keep the rolling elements clamped between the two annular surfaces 144, 146.

[0033] The cutting device 139 comprises at least one cutting tool 148 such as a drill bit, a drill bit or a milling cutter. The cutting device 139 may further comprise a chuck (not shown) to which the cutting tool 148 is attached.

[0034] The cutting device 139 is adapted to be attached to the output member of the vibratory element 136 to follow its rotation and reciprocating movement. For example, as in the illustrated example, the cutting tool 148 has an input member, such as an input shaft 150, which is threaded to screw into the threaded output opening 138 of the vibratory element 136.

[0035] Preferably, the input and output members are complementary to each other. For example, the output openings 112, 126, 138 are similar, as are the input shafts 124, 134, 150. Thus, the cutting tool 139 can be mounted either directly on the output member of the main body 102 when neither the micrometer stop 114 nor the vibratory module 128 are used, or on the output member of the micrometer stop 114 when the latter is used but not the vibratory module 128, or on the output member of the vibratory module 128 when both the micrometer stop 114 and the vibratory module 128 are used.

[0036] With reference to the, a method of improving a manual cutting machine will now be described.

[0037] During a step 202, a manual cutting machine as illustrated in is obtained. This manual cutting machine comprises in particular the micrometric stop 114 mounted in the outlet opening 112 of the main body 102 and the cutting device 139 mounted in the outlet opening 126 of the micrometric stop 114.

[0038] Returning to the, during a step 204, the cutting device 139 is separated from the outlet opening 126 of the micrometric stop 114.

[0039] During a step 206, the vibratory module 128 is mounted in the outlet opening 126 of the micrometric stop 114.

[0040] During a step 208, when the anti-rotation stop comprises the screw 133, the latter is screwed into the housing 130 of the mounted vibratory module 128, through the lateral opening 131 of the base 118.

[0041] During a step 210, the cutting device 139 is fixed in the outlet opening 138 of the vibratory module 128.

[0042] In conclusion, it will be noted that the invention is not limited to the embodiments described above. It will indeed appear to those skilled in the art that various modifications can be made to the embodiments described above, in light of the teaching which has just been disclosed to them.

[0043] In the detailed presentation of the invention given above, the terms used should not be interpreted as limiting the invention to the embodiments set forth in this description, but should be interpreted to include all equivalents the prediction of which is within the reach of those skilled in the art by applying their general knowledge to the implementation of the teaching just disclosed to them.

Claims

Vibratory module (128) for a manual cutting machine (100) with micrometric stop (114), characterized in that it comprises: a housing (130) intended to be fixed in rotation around an axis (A) relative to a housing (116) of the micrometric stop (114); a rotary element (132) mounted movably, relative to the housing (130), around the axis (A), the rotary element (132) having an input member designed to be fixed to a rotary element (122) of the micrometric stop (114); a vibratory element (136) mounted slidably, relative to the rotary element (132), along the axis (A), the vibratory element (136) having an output member designed to be fixed to a cutting device (139);anda vibration mechanism (140) designed to give the vibrating element (136) a reciprocating movement along the axis (A) relative to the rotating element (132), when this rotating element (132) is rotated about the axis (A) by the rotating element (122) of the micrometer stop (114).; The vibratory module (128) of claim 1, wherein the output member includes a threaded output opening (138) for receiving a threaded input shaft (150) of the cutting device (139). A vibratory module (128) according to claim 1 or 2, wherein the input member comprises a threaded input shaft (134). A vibratory module (128) according to any one of claims 1 to 3, wherein the input member and the output member are complementary to each other. Vibratory module (128) according to any one of claims 1 to 4, in which the vibration mechanism (140) comprises rolling elements, such as balls (142), interposed between two annular surfaces (144, 146), transverse to the axis (A), one (144) belonging to the housing (130) of the vibratory module (128) and the other (146) to the vibratory element (136), at least one of these annular surfaces (144, 146) having a relief. A manual cutting machine (100) comprising:a main body (102) comprising:a housing (104) having a handle (106) adapted to be grasped by a human operator in order to operate the manual cutting machine (100),a motor (108) fixed to the housing (104), andan output member driven by the motor (108);a micrometer stop (114) mounted on the output member and having an output member; anda cutting device (139) adapted to be mounted on the output member of the micrometer stop (114);characterized in that it comprises a vibratory module (128) according to any one of claims 1 to 5, mounted on the output member of the micrometer stop (114), in place of the cutting device (139), and in that the cutting device (139) is mounted on the output member of the vibratory module (128). Manual cutting machine (100) according to claim 6, in which the micrometric stop (114) comprises a housing (116) and a base (118) extending around the axis (A) and mounted axially movable on the housing (116), but fixed in rotation around the axis (A) relative to the housing (116), and in which the vibratory module (128) comprises an anti-rotation stop fixed to the housing (130) of the vibratory module (128) and extending into a lateral opening (131) formed in the base (118). Method for improving a manual cutting machine to obtain a manual cutting machine according to claim 6 or 7, comprising:a mounting (206) of the vibratory module (128) on the output member of the micrometric stop (114), in place of the cutting device (139); anda mounting (210) of the cutting device (139) on the output member of the vibratory module (128).

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