JP2006334677A - Broaching machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broaching machine, supporting a workpiece in a regular position in mounting the workpiece already machined by the broaching machine to a second finishing machine. <P>SOLUTION: In this broaching machine, an upper tool 11 is provided with a coolant scattering preventing wall 91 extended in circumferential contact to the workpiece W rather closer to the hole part of the workpiece than a part W1 of the workpiece W supported on the broaching machine, which is to be supported in the subsequent machining. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to, for example, a broaching machine that processes an inner peripheral surface of a workpiece, and more particularly, to a broaching machine that performs broaching while supplying coolant to a cutting portion of a broaching shaft or a processing portion by a broaching shaft of a workpiece. .

Conventionally, a broaching machine for finishing the inner peripheral surface of a workpiece is shown in FIG. The broaching machine 101 is inserted into a support jig 141 having a hole 147 that supports a workpiece W having a hole 177, and a hole 177 of the work W and a hole 147 of the support jig 141. And a broach shaft 121 provided with a cutting edge 124 that performs processing while moving along the inner periphery of the hole of the workpiece W, and a hole 117 into which the broach shaft 121 is inserted on the upper side of the supported workpiece W. And an upper jig 111 and coolant supply ports 112 and 142 for supplying coolant to a processing portion 177 of the cutting edge 124 of the broach shaft 121 or the broach shaft 121 of the workpiece W. Then, the hole 177 of the workpiece W is drilled by the cutting edge 124 of the broach shaft 121 through the broach shaft 121.
JP 2001-198726 A

  Further, after the hole machining by the broaching machine 101, the next machining may be performed by a different machine (for example, hobbing machine). When performing this next processing, the workpiece (W) is conveyed from the broaching machine to the hobbing machine, and the workpiece W is attached to the hobbing machine.

However, when processing is performed by the broaching machine 101 as described above, the coolant adheres to the planned support portion W1 that is located on the outer peripheral side of the workpiece W and is supported by the hobbing machine at the stage of processing by the broaching machine 101. To do. The workpiece W to which the coolant is attached is easily attached to the chips. When the workpiece W to which the chips are attached is attached to the hobbing machine for the next processing, the hobbing machine sandwiches the chips at the planned support portion W1. The workpiece W is supported. In this case, the workpiece W is often inclined with respect to the machining reference, and machining defects often occur.
In addition, the coolant supplied to the upper surface of the workpiece W may be scattered in addition to the broaching machine equipment, resulting in time and labor for the recovery.

  Therefore, the present invention solves the problems as described above, and can be supported at a regular position when the workpiece having been processed by the broaching machine is attached to a different processing machine, and on the upper surface of the workpiece. An object of the present invention is to provide a broaching machine capable of preventing the supplied coolant from being scattered outside the broaching machine equipment.

  The present invention supports a workpiece having a hole, is inserted into a hole of a workpiece and a support jig having a hole, and moves along the inner periphery of the hole of the workpiece. Depending on the broaching shaft provided with a cutting edge for processing, an upper jig having a hole into which the broaching shaft is inserted above the supported workpiece, the cutting edge of the broaching shaft or the broaching shaft of the workpiece In a broaching machine, which is provided with a coolant supply port for supplying coolant to a processing part, and in which a hole of a workpiece is processed by a cutting edge of a broach shaft, and after the processing, the next processing is performed by a different processing machine. The upper jig is provided with a coolant scattering prevention wall extending circumferentially to the workpiece, on the hole side of the workpiece relative to the support portion to be supported in the next processing of the workpiece supported by the workpiece. This is the first feature.

  In addition to the first feature described above, the second feature of the coolant scattering prevention wall is that the contact surface with the workpiece is made of a rubber-like elastic body.

  In addition to the first feature described above, the third feature of the coolant scattering prevention wall is that the contact surface with the workpiece is made of a resinous elastic body.

  According to the broaching machine of the first feature of the present invention, the upper jig is mounted on the upper jig on the hole side of the workpiece with respect to the planned support portion to be supported in the subsequent machining of the workpiece supported on the broaching machine. Since the coolant scattering prevention wall extending circumferentially to the workpiece is provided, the chips are difficult to adhere to the planned support portion in the next machining of the workpiece. Therefore, the workpiece can be attached to the processing machine that performs the next processing at a regular position, and processing defects in the next process can be reduced. Further, it is possible to prevent the coolant supplied to the upper surface of the workpiece from being scattered outside the broaching machine equipment.

  According to the broaching machine of the second feature of the present invention, since the coolant scattering prevention wall is formed of a rubber-like elastic body in contact with the workpiece, the coolant scattering prevention wall contacts the workpiece. It is possible to prevent the workpiece from being damaged even if it comes into contact.

  According to the broaching machine of the third feature of the present invention, the coolant scattering prevention wall is formed of a resin-like elastic body in contact with the workpiece, so that the coolant scattering prevention wall contacts the workpiece. It is possible to prevent the workpiece from being damaged even if it comes into contact.

  FIG. 1 to FIG. 4 show an embodiment of a broaching machine according to the present invention. FIG. 1 is a partial sectional front view showing a state before processing a workpiece, and FIG. 2 shows a state immediately before processing the workpiece. FIG. 3 is a partial cross-sectional front view showing a state immediately after the end of processing, FIG. 4 is a partial cross-sectional front view showing the state after the end of processing, and FIG. FIG. 6 is a partial cross-sectional front view showing a state before assembling, and FIG. 6 is a partial cross-sectional front view showing a state in which the workpiece by the broaching machine is assembled to a different processing machine.

  First, the broaching machine 1 will be described with reference to FIG. The broaching machine 1 is inserted into a support jig 41 having a hole 47 for supporting a workpiece W having a hole 77 and a hole of the workpiece W and the support jig 41, so that the workpiece W Broaching shaft 21 provided with cutting edge 24 that performs processing while moving the inner periphery of the hole, upper jig 11 having hole 17 into which the broaching shaft is inserted above supported workpiece W, and support A pocket 43 that communicates with a hole 47 of the jig 41 and is defined below, and a pull head 51 that is disposed below the pocket 43 and has a clamp mechanism 52 that can support the lower end of the broach shaft 21 is provided.

  The broach shaft 21 has a small end portion 23 having a small diameter near the lower end, and a protruding end portion 22 having a diameter larger than that of the small end portion 23 at the lower end tip. The pocket 43 is provided with an air supply hose 44 for supplying air to one of the facings, and a chip discharge hose 45 for discharging chips to the other. Further, the pull head 51 includes a clamp mechanism 52 having a claw portion 53 that can move forward and backward toward the inner diameter side at a predetermined position of the inner peripheral hole 55, and is slightly below the position where the claw portion 53 is disposed in the inner peripheral hole 55. On the other hand, a retaining pin 54 that is orthogonal is disposed.

  A suction hose 62 is connected to the inner peripheral hole 55 of the pull head 51 and is connected to a discharge device 61 disposed outside the broaching machine 1. The discharge device 61 includes a suction mechanism that sucks chips and coolant. Here, the support jig 41 and the upper jig 11 are arranged such that a space for inserting the workpiece W is maintained at a predetermined interval. The coolant supply ports 12 and 42 formed in the support jig 41 and the upper jig 11 are connected to a coolant generator (not shown). Between the workpiece W supported by the support jig 41 of the broaching machine 1 and the upper jig 11, there is a hole in the workpiece W than the planned support part W1 which is the position supported by the hobbing machine that performs the next machining. On the part 77 side, a coolant scattering prevention wall 91 that extends circumferentially from the upper jig 11 to the workpiece W and prevents the coolant from scattering to the planned support part W1 is banded to the convex part 13 of the upper jig 11. 92 is attached. The coolant scattering prevention wall 91 is made of a rubber-like elastic body, and the rubber-like elastic body is oil resistant.

  Next, a method of finishing the inner peripheral surface of the workpiece W with the broaching machine 1 and a method of discharging chips and coolant generated at that time will be described.

  First, as shown in FIG. 1, air is supplied from an air supply hose 44 as indicated by an arrow while the broach shaft 21 is waiting at the top. In this state, as shown in FIG. 2, the workpiece W is placed on the upper surface of the support jig 41 and positioned and fixed. Subsequently, the supply of misted coolant is started from the coolant supply ports 12 and 42, and the broaching shaft 21 waiting on the upper side is lowered. At the same time as the protruding end portion 22 of the broach shaft 21 contacts the retaining pin 54, the claw portion 53 of the clamp mechanism 52 of the pull head 51 protrudes to the inner peripheral side and engages (clamps) the small end portion 23 of the broach shaft 21. In this state, the pull head 51 pulls the broach shaft 21 downward, and the broach shaft 21 continues to descend further. Then, as shown in FIG. 3, when the cutting edge 24 of the broach shaft 21 passes through the inner peripheral surface of the workpiece W, the inner peripheral surface is finished. Subsequently, when the broach shaft 21 is lowered to a predetermined position, the broach shaft 21 and the pull head 51 start to rise to a predetermined position. Thereafter, the claw portion 53 of the clamp mechanism 52 of the pull head 51 is retracted to the outer peripheral side, and the broach shaft 21 is unclamped from the clamp mechanism 52. Then, as shown in FIG. 4, the broach shaft 21 further rises independently, and after the broach shaft 21 passes through the workpiece W, the supply of coolant is stopped. Then, the workpiece W is unloaded from the support jig 41.

  During the finishing process, chips K and a part of the coolant generated by the process are collected from the chip discharge hose 45 to a discharge device (not shown) outside the broaching machine 1 by the air supplied from the air supply hose 44. Further, when the broach shaft 21 is not inserted into the pull head 51, the suction mechanism of the discharge device 61 is operated, and as shown by the arrows, some chips K and coolant that have entered the inner peripheral hole 55 of the pull head 51 are removed from the air. Is collected into the discharge device 61 through the suction hose 62 and accommodated.

  Next, hobbing for forming a tooth profile on the outer periphery by supporting a workpiece W that has been drilled by the broaching machine 1 on a hobbing machine 2 (different processing machine) will be described.

  As shown in FIG. 5, the workpiece W having the hole 77 processed by the broaching machine 1 is conveyed to the hobbing machine 2, and the hole 77 of the workpiece W is inserted into the core bar 3 of the hobbing machine. Then, the planned support portion W <b> 1 formed on the one end surface of the inserted workpiece W comes into contact with the workpiece receiver 4 formed around the cored bar 3. Subsequently, the center pressing portion 6 is pressed and fixed to the concave portion 8 formed on the core metal 3, and the pressing plate 5 formed around the center pressing portion 6 is formed on the other end surface of the workpiece W to be supported. Press and fix W1. In this way, the workpiece W is fixed at a normal position with respect to the machining reference by the core metal 3, the workpiece receiver 4 and the pressing plate 5. When the workpiece W is fixed, the hob 8 moves to the outer periphery of the workpiece W to perform hobbing as shown in FIG.

  As described above, according to the broaching machine 1, the coolant supplied to the upper surface of the workpiece W is next to the workpiece W by the upper surface of the workpiece W, the coolant scattering prevention wall 91 and the upper jig 11. It is possible to prevent the hobbing machine to be processed from being scattered to the planned support part W1. For this reason, the coolant adheres to the planned support portion W1 of the workpiece W, and the chips adhere to the coolant, and the chips are formed between the planned support portion W1 and the work receiver 4 or between the planned support portion W1 and the pressing plate 5. It is possible to prevent the workpiece W from being attached to the processing machine that sandwiches and performs the next processing inclining with respect to the processing reference. In addition, since the workpiece W is not washed away after being processed by the broaching machine 1 until it is supported by the hobbing machine, the amount of oil used is reduced and machining that is friendly to the global environment is performed. It can be performed.

  Further, since the coolant scattering prevention wall 91 in contact with the upper surface of the workpiece W is made of a rubber-like elastic body, it is possible to prevent the upper surface of the workpiece W from being damaged.

  In the present embodiment, the coolant flow-out prevention passage 91 allows the coolant flow path supplied to the upper surface of the workpiece W to be only the hole 47 of the support member 41. Moreover, the coolant that has entered the inner peripheral hole 55 of the pull head 51 is sucked by a discharge device and a discharge device 61 (not shown). Therefore, it is possible to prevent the coolant supplied to the upper surface of the workpiece W from flowing out to other than the broaching machine equipment.

  The discharge device 61 of the broaching machine 1 temporarily stops while the broach shaft 21 is inserted into the pull head 51. For this reason, consumption of the discharge device 61 can be suppressed.

  In addition, although the hobbing machine was described as an example of a different processing machine of the present invention, the present invention is not limited to this, and the processing is performed by supporting the planned support portion W1 of the workpiece W on the broaching machine as a processing reference. If it is. Moreover, although the rubber-like elastic body has been described as an example of the coolant scattering prevention wall of the present invention, any material may be used as long as it does not hurt even if it contacts the workpiece W. For example, a resin-like elastic body is used. It is also possible to use it.

It is a fragmentary sectional front view showing the state before the process of the broaching machine of the Example of this invention. It is a partial section front view showing the state just before the process of the broaching machine of the Example of this invention. It is a partial cross section front view showing the state immediately after the process of the broaching machine of the Example of this invention. It is a partial section front view showing the state after processing of the broaching machine of the example of the present invention. It is a fragmentary sectional front view showing the state just before attaching the workpiece W to the processing machine from which the Example of this invention differs. It is a partial section front view showing the state of processing which attaches work piece W to the processing machine from which the example of the present invention differs. It is a fragmentary sectional front view showing the state just before the process of the conventional broaching machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Broaching machine 2 Different processing machine 11 Upper jig | tool 12, 42 Coolant supply port 17 Hole part of upper jig 21 Broach shaft 24 Cutting edge 41 Support jig 47 Hole part of support jig 77 Hole part of work piece 91 Coolant Anti-scattering wall W Work piece W1 Planned support

Claims (3)

  A support jig (41) supporting a workpiece (W) having a hole (77) and having a hole (47), and a hole (47) of the workpiece (W) and the support jig And a broaching shaft (21) provided with a cutting edge (24) for processing while moving along the inner periphery of the hole of the workpiece, and a broaching shaft on the upper side of the supported workpiece (W) Supply coolant to the upper jig (11) having the hole (17) into which (21) is inserted and the cutting part (24) of the broach shaft or the processed part of the workpiece (W) by the broach shaft. A coolant supply port (12, 42) for processing the hole (77) of the workpiece (W) with the cutting edge (24) of the broach shaft, and after the processing, a different processing machine ( 2) In the broaching machine in which the next machining is performed in accordance with 2), the next machining of the workpiece (W) supported by the broaching machine On the hole (77) side of the workpiece (W) from the planned support portion (W1) to be held, the upper jig (11) was circumferentially extended to the workpiece (W). A broaching machine comprising a coolant scattering prevention wall (91).   2. The broaching machine according to claim 1, wherein the coolant scattering prevention wall (91) is configured by a rubber-like elastic body at a contact surface with the workpiece (W).   The broaching machine according to claim 1, wherein the coolant scattering prevention wall (91) has a contact surface with the workpiece (W) made of a resinous elastic body.

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