Tucking rod

Abstract

To efficiently remove a to-be-removed portion from a workpiece.SOLUTION: A tucking rod 30 includes: a pair of plates 32, 33 facing each other in a plate thickness direction; and an intermediate portion disposed between the pair of plates 32, 33 and at a base end part 30a which is a one-end side in a longitudinal direction of the pair of plates 32, 33. A slit 31 into which to-be-removed portions WB1, WB2, which are to be removed from a workpiece W, can be inserted is formed between the pair of plates 32, 33 and at a tip end part 30b which is the other-end side in the longitudinal direction of the pair of plates 32, 33.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a push-in bar. [Background technology]

[0002] For example, a removal device is known that removes burrs and plan portions formed on a workpiece such as a casting having a complex shape (see, for example, JP 2023-96220 A). The removal device includes a removal target part removal rod for removing burrs and plan portions that are the parts to be removed. The removal target part removal rod is formed with a slit for inserting the part to be removed. The removal device rotates the removal target part removal rod with the part to be removed inserted in the slit around its axis to bend and remove the part to be removed from the workpiece. The removal device drops the part to be removed near the removal position to prevent the part to be removed from scattering. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2023-96220 Summary of the Invention [Problem to be solved by the invention]

[0004] In the prior art, a removal target portion removal rod may be unable to remove the portion to be removed due to slippage between the portion to be removed inserted into the slit and the inner surface of the slit that abuts against the portion to be removed. The present invention provides a push-break rod that can efficiently remove the portion to be removed. [Means for solving the problem]

[0005] A push-breaking rod in one embodiment of the present invention comprises a pair of plates facing each other in the plate thickness direction, and an intermediate portion arranged between the pair of plates at a base end which is one longitudinal end side of the pair of plates, and at a tip end which is the other longitudinal end side of the pair of plates, a slit is formed between the pair of plates into which the portion to be removed from the workpiece can be inserted. Effect of the Invention

[0006] According to one aspect of the present invention, the portion to be removed can be efficiently removed from the workpiece. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic diagram showing a removal device including a break bar according to an embodiment; [Diagram 2] FIG. 2 is a side view showing a push-and-break pin according to one embodiment. [Diagram 3] FIG. 2 is a cross-sectional view showing a push-and-break bar according to one embodiment. [Figure 4] FIG. 2 is a front view showing a push-and-break pin according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A removal device 100 according to the embodiment is a device for removing removal target portions WB1, WB2 formed on a workpiece W from a part WP. The workpiece W is, for example, a casting having a complex shape. The workpiece W has a part WP and removal target portions WB1, WB2. The part WP may be, for example, a casting having a complex structure such as a transformer housing. The removal target portions WB1, WB2 include burrs and design parts. The workpiece W is, for example, transported by a transport robot and supplied to the removal device 100.

[0009] The workpiece W formed using a slide core or a die generates burrs at the butt joint between the slide core and the die. In addition, since the molten material is supplied through a flow path such as a sprue and a runner, the removal target parts WB1 and WB2 including the design part and the part WP are integrated after the workpiece W solidifies. Therefore, it is necessary to separate the part WP that can be used as a product from the removal target parts WB1 and WB2 of the workpiece W. The removal target parts WB1 and WB2 have a plurality of removal target parts WB1 and WB2. The removal target parts WB1 and WB2 may be intentionally formed to have a thick wall thickness so that they do not break and scatter during transportation of the workpiece W. Furthermore, the thickness of the boundary between the removal target parts WB1 and WB2 and the part WP of the removal target parts WB1 and WB2 may be thinner than the thickness of the surrounding parts. This makes it easier to break the removal target parts WB1 and WB2 at the boundary with the part WP.

[0010] FIG. 1 illustrates an X-axis, a Y-axis, and a Z-axis that are perpendicular to each other. The X-axis direction is along the vertical direction. The Y-axis and Z-axis directions are along the horizontal direction. The X-axis direction is a direction along the X-axis, and includes the direction indicated by the arrow and the opposite direction. The Y-axis direction includes both directions along the Y-axis. The Z-axis direction includes both directions along the Z-axis. The X-axis, Y-axis, and Z-axis directions may be other directions. The removal device 100 may be positioned in any orientation.

[0011] The removal device 100 includes a device base 10, a workpiece holding unit 20, a push-and-break rod 30, a drive unit 40, and a control unit 50. The device base 10 is a base for supporting the workpiece W. The workpiece holding unit 20 is mounted on the device base 10 and holds the workpiece W. The workpiece W is held in a predetermined posture relative to the device base 10.

[0012] The workpiece holding unit 20 includes, for example, a pedestal and a clamp. The pedestal may be, for example, disk-shaped. The clamp is used to press the edge of the workpiece W against the pedestal, thereby fixing the workpiece W to the pedestal. The workpiece holding unit 20 is not limited to one including a clamp as long as it is capable of holding the workpiece W, and may be, for example, one that holds the end face of the workpiece W by vacuum suction.

[0013] The workpiece holding unit 20 has rotation axes C1 and C2 extending in directions perpendicular to each other. The rotation axis C1 is along the Y-axis direction. The rotation axis C2 is along the Z-axis. The workpiece holding unit 20 can rotate the pedestal around the rotation axes C1 and C2. The removal device can change the posture of the workpiece W by controlling the rotation angles of the rotation axes C1 and C2. The removal device 100 has a drive source and a power transmission mechanism for rotating the pedestal.

[0014] The drive unit 40 rotates the jolt-breaking bar 30 around the rotation axis C3. The rotation axis C3 extends in the Z-axis direction. The central axis L of the jolt-breaking bar 30 is arranged to coincide with the rotation axis C3. The drive unit 40 includes a motor, which is a drive source, and a power transmission mechanism. The drive unit 40 includes a base to which the jolt-breaking bar 30 is fixed. The jolt-breaking bar 30 is connected to the base and rotates around the rotation axis C3. The longitudinal direction of the jolt-breaking bar 30 is arranged along the rotation axis C3. The drive unit 40 has a mechanism for translating the base in the X-axis, Y-axis, and Z-axis directions. The jolt-breaking bar 30 fixed to the base can move in the X-axis, Y-axis, and Z-axis directions.

[0015] As shown in Figs. 2 to 4, the push-breaking bar 30 includes a pair of plates 32, 33 and an intermediate plate 34. The pair of plates 32, 33 and the intermediate plate 34 are plate-shaped. The plate thickness direction of the pair of plates 32, 33 and the intermediate plate 34 is along, for example, the X-axis direction. The pair of plates 32, 33 are disposed facing each other in the X-axis direction. The intermediate plate 34 is disposed between the pair of plates 32, 33 in the X-axis direction. The intermediate plate 34 is sandwiched between the pair of plates 32, 33.

[0016] The longitudinal direction of the pair of plates 32, 33 and the intermediate plate 34 is aligned with the longitudinal direction of the poke-and-break bar 30. In the longitudinal direction of the poke-and-break bar 30, the length of the intermediate plate 34 may be approximately half the length of the pair of plates 32, 33. The intermediate plate 34 is disposed at the base end portion 30a, which is one end side, in the longitudinal direction of the pair of plates 32, 33. The intermediate plate 34 is not disposed at the tip end portion 30b, which is the other end side, in the longitudinal direction of the pair of plates 32, 33.

[0017] A slit 31 is formed in the tip 30b of the jolt-breaking bar 30. The slit 31 is a gap formed in a pair of plates 32, 33. The slit 31 is a slit 31 into which the removal target parts WB1, WB2 to be removed from the workpiece W can be inserted. The width of the slit 31 along the X-axis direction corresponds to the plate thickness of the intermediate plate 34. For example, the width of the slit 31 along the X-axis direction can be changed by changing the plate thickness of the intermediate plate 34. For example, the width of the slit 31 along the X-axis direction may be changed by changing the number of intermediate plates 34 arranged between the pair of plates 32, 33. The width of the slit 31 along the X-axis direction may be changed in accordance with the thickness of the removal target parts WB1, WB2. The length of the slit 31 may be changed by changing the length of the intermediate plate 34.

[0018] The pair of plates 32, 33 and the intermediate plate 34 are connected to each other using, for example, bolts 36 and nuts 37. The pair of plates 32, 33 and the intermediate plate 34 are formed with bolt holes 35 penetrating in the plate thickness direction. The bolts 36 are inserted into the bolt holes 35. The nuts 37 attached to the bolts 36 are tightened to fix the pair of plates 32, 33 and the intermediate plate 34 to each other.

[0019] The inner surfaces of the pair of plates 32, 33 in contact with the slit 31 may be formed with an uneven shape. The inner surfaces of the pair of plates 32, 33 in contact with the slit 31 are the surfaces of the pair of plates 32, 33 facing each other in the plate thickness direction. The inner surfaces forming the slit 31 may be formed with an uneven shape. The uneven shape includes a plurality of convex portions 38. The convex portions 38 protrude in the X-axis direction from the inner surfaces of the pair of plates 32, 33. The convex portions 38 may be formed by forming a plurality of grooves on the inner surfaces of the pair of plates 32, 33. The convex portions 38 extend, for example, in the longitudinal direction of the pair of plates 32, 33. By forming an uneven shape on the inner surfaces of the pair of plates 32, 33, it is possible to increase the frictional force between the inner surfaces of the pair of plates 32, 33 and the removal target parts WB1, WB2.

[0020] The control unit 50 controls the operation of the drive unit 40 and can control the position and rotation of the jostle pin 30. The control unit 50 has a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The control unit 50 realizes various functions by, for example, executing programs stored in the memory unit with the CPU. The memory unit includes a ROM and a RAM.

[0021] The control unit 50 can move the pushing-breaking bar 30 to insert the removal target portions WB1, WB2 into the slit 31. The control unit 50 can rotate the pushing-breaking bar 30 around the Z-axis to fold the removal target portions WB1, WB2 inserted into the slit 31 and remove the removal target portions WB1, WB2 from the part WP. The control unit 50 can control the position and rotation of the pushing-breaking bar 30 to drop the removal target portions WB1, WB2 in the slit 31 to predetermined positions.

[0022] In the prior art, the slits were made in a rod-shaped member by wire cutting, etc. Therefore, it was not possible to form an uneven shape on the inner surface of the slit, and the parts WB1 and WB2 to be removed inserted in the slit would slip, and there were cases where the parts WB1 and WB2 to be removed could not be bent and removed.

[0023] The jolt-breaking bar 30 according to this embodiment includes a pair of plates 32, 33 facing each other in the plate thickness direction, and a middle plate (middle portion) 34 disposed between the pair of plates 32, 33 at a base end portion 30a, which is one end side in the longitudinal direction of the pair of plates 32, 33. At a tip end portion 30b, which is the other end side in the longitudinal direction of the pair of plates 32, 33, a slit 31 is formed between the pair of plates 32, 33 into which the portions WB1, WB2 to be removed from the workpiece W can be inserted.

[0024] With such a shoving and breaking rod 30, the removal target areas WB1, WB2 can be bent and removed by rotating the shoving and breaking rod 30 around the Z axis while the removal target areas WB1, WB2 are inserted into the slits 31.

[0025] In the shoving and breaking bar 30, the slit 31 can be easily formed by sandwiching the intermediate plate 34 between the pair of plates 32, 33. The width of the slit 31 can be changed by changing the thickness of the intermediate plate 34. In addition, before the pair of plates 32, 33 are assembled, an uneven shape can be easily formed on the inner surface of the plates 32, 33. Therefore, the friction force between the inner surface of the plates 32, 33 and the parts WB1, WB2 to be removed can be increased. As a result, the parts WB1, WB2 to be removed inserted into the slit 31 are less likely to slip, and the parts WB1, WB2 to be removed can be easily bent and removed. In the shoving and breaking bar 30, the inner surface of the plates 32, 33 can be processed before the pair of plates 32, 33 are assembled, thereby forming an inner surface with a predetermined surface roughness. This allows the friction force between the inner surface of the plates 32, 33 and the parts WB1, WB2 to be removed to be adjusted appropriately. In the shoving and breaking bar 30, the parts WB1, WB2 to be removed can be efficiently removed from the workpiece W.

[0026] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. [Explanation of symbols]

[0027] 100...removal device, 10...device base, 20...work holding portion, 30...breaking rod, 30a...base end portion, 30b...tip portion, 31...slit, 32, 33...plate (pair of plates), 34...middle plate (middle portion), 38...convex portion, 40...drive portion, 50...control portion, C1, C2, C3...rotation axis, L...central axis, W...work, WB1, WB2...area to be removed, WP...part.

Claims

[Claim 1] A pair of plates facing each other in a plate thickness direction; and an intermediate portion disposed between the pair of plates at a base end portion which is one end side of the pair of plates in the longitudinal direction, A breaking rod characterized in that at the tip portion, which is the other longitudinal end side of the pair of plates, a slit is formed between the pair of plates into which the part to be removed from the workpiece can be inserted.

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