JPH0557424A - Trimming device - Google Patents

Abstract

PURPOSE:To surely remove casting flash by holding a casting so as to not to turn an displace at the time of trimming. CONSTITUTION:This trimming device is constituted so as to cut off the casting flash by holding the casting M with a lower side supporting member 3 for supporting lower face of the casting M while projecting upward from an opening part 1a in a base plate 1 and an upper side supporting member 4 for pressing the casting M at this upper surface and descending the casting M to cutting edges 2, 2 set to both sides of the opening part 1a in the base plate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trimming device for removing burrs from cast products.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 63-140758 discloses
The work 1 is placed on the recessed pedestal 2 and the upper die 7 attached to the elevating ram of the hydraulic press and having the cutting blade 5 fixed to the lower side is lowered to lower the cutting blade 5 to the position below the work 1. There is disclosed a technique in which the work 1 can be safely and easily taken out at the bottom dead center of the elevating ram by stopping the elevating ram at that time.

[0003]

According to the above-mentioned conventional technique, the cutting burrs protruding from the upper and lower sides of the work 1 are cut off from the work 1 placed on the pedestal 2 by dropping the cutting blade 5 from above. However, in the case where the work 1 is an axial casting such as a camshaft, when the burrs on the left and right have different thicknesses, the thinner one is cut first and the thicker one remains, causing a problem that the work 1 rotates in the circumferential direction. ..

The present invention has been made in view of the above problems,
(EN) A trimming device capable of reliably removing casting burrs by holding a casting so as not to be rotationally displaced during trimming.

[0005]

The present invention, as shown in FIGS. 1 to 3, has a base in which cutting blades 2 and 2 are arranged so as to have an opening 1a for passing a casting M in a trimming direction thereof. 1
A lower support member 3 that projects above the opening 1a of the base 1 to support the lower surface of the casting M, and a lower support member 3 that is arranged to press the upper surface of the casting M. An upper support member 4 for sandwiching the casting M therebetween, and driving means 3a, 4a for vertically moving each of the lower support member 3 and the upper support member 4 so as to pass through the opening.
And the casting M, the lower support member 3 and the upper support member 4
Both supporting members 3 and 4 are sandwiched by
The gist of the present invention is that the drive control means 11 is driven down to a position passing through.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a cross-sectional view of the device of the present invention, and FIG. 2 is II-- of FIG.
II view, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, in which 1 is a base, and an opening 1a for passing the casting M of the camshaft in the center in the trimming direction, that is, the direction of arrow A. The cutting blades 2 are respectively arranged on the left and right sides so as to have. The cutting blade 2 is fitted into the notch recess 1b of the base 1 and is fitted with a plurality of bolts.
It is fixed from 2a.

A lower support member 3 for supporting the lower surface of the casting M is provided in the opening 1a so as to project above the base 1, and the lower support member 3 is lifted and lowered below the lower support member 3. Lower support member driving means 3a is provided. Further, the upper support member 4 is arranged so as to press the upper surface of the casting M, and the upper portion of the upper support member 4 is fixed to the elevating ram 5 of the hydraulic press. Four guide pins 6 are provided on the elevating ram 5 so as to project downward, and a pin hole 7 is provided in the base 1 so as to correspond to the guide pins 6. Above the lifting ram 5, an upper support member driving means 4a is arranged, and a control means 11 for driving and controlling the both driving means 3a, 4a is arranged.

When the casting M is a shaft camshaft, the upper and lower support members 4 and 3 are arranged so as to sandwich the cam portion C. Further, since the burrs generated on both the left and right sides in the axial direction of the casting M are positioned so as to be in a horizontal state, the horizontal projecting pieces 8 are provided on both sides of the casting M substantially in the center in the axial direction, and the lower side support is provided. Member 3
A supporting member 9 is provided as a processing reference for projecting the protruding pieces 8 and 8 in a horizontal state. That is, the projecting piece 8 and the supporting member 9 form a circumferential positioning means for the casting M. Furthermore, since the casting M is positioned in the axial direction,
An axial positioning member 10 is provided which projects from the lower support member 3 and fits into a recess between both cams C.

Therefore, when the casting M descends as will be described later, the casting M is stopped by the upper and lower support members 4 and 3 so that the burr always contacts the cutting edges 2 and 2 at right angles. The casting M is clamped in the state, and the axial positioning member 10 restricts the displacement of the casting M in the axial direction.

As described above, after the casting M is clamped by the upper and lower supporting members 4, 3 at the position above the base 1, the upper and lower supporting members 4, 3 are simultaneously driven by the driving means 4a, 3a. The burrs protruding on both sides of the casting M are cut off by the cutting blades 2 and 2 by the downward movement in the direction A. At this time, since the casting M is non-rotatably sandwiched between the support members 4 and 3, even if the burrs on both sides have different thicknesses, the casting does not rotate unlike the conventional apparatus.

After the burrs are cut off, the casting M is raised again above the base 1, the holding by the supporting members 3 and 4 is released, and the casting M is moved to another place.

Since the cutting edges 2 and 2 are formed symmetrically with each other, when the edges of the cutting edges 2 and 2 are worn or damaged, the bolts 2a are attached and detached so that the cutting edges 2 and 1 are rotated in the opposite directions and the sizing by the new cutting edge is performed. It will be possible.

[0013]

As described above, according to the present invention, the casting can be clamped by the upper and lower support members so as not to be rotationally displaced, and the burrs formed on the left and right sides of the casting can be cut off by the cutting blades. Rotation of the casting caused by the difference in the thickness of the burrs on both sides of the shaft-shaped casting in the conventional device is prevented, and the burrs of the casting can be reliably removed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the device of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

[Explanation of symbols]

 1 Base 1a Opening 2 Cutting Edge 3 Lower Support Member 3a Lower Support Member Drive Means 4 Upper Support Member 4a Upper Support Member Drive Means 11 Drive Control Means M Casting

Claims (3)

[Claims] 1. A base provided with a cutting blade having an opening for allowing a casting to pass in the trimming direction, and a lower side support projecting upward from the opening of the base to support the lower surface of the casting. A member and an upper support member that is arranged so as to press the upper surface of the casting and holds the casting between the lower support member and each of the lower support member and the upper support member. And a drive control means for lowering and driving both supporting members so as to pass through the cutting edge while the casting is sandwiched between the lower supporting member and the upper supporting member. A trimming device comprising: 2. The trimming device according to claim 1, wherein the casting is a cam shaft, and the cam portion is sandwiched between an upper support member and a lower support member. 3. The trimming device according to claim 1, further comprising a circumferential positioning means and an axial positioning member necessary for positioning the casting when sandwiched between the upper support member and the lower support member.