DE8126791U1 - CUTTING TOOL WITH INTERCHANGEABLE CUTTERS AND COOLING SYSTEM - Google Patents

Description

FRIEDRICH-WILHELM ENGSL ·, «■, J ..;, ', *: ί ΐ & οο Karlsruhe ι

LAWYER "'« "' ePHANIENSTRASSE DIPLOMPHYSICIST TELE PON (O721> 24943 TELEX 7825875 gnio d

December 10, 1982 E / SU

company

ISCAK Hartmetall GmbH

Eisenstockstrasse lh

7505 Ettllngen-Ettlingenweier

Parting tool with exchangeable cutting bodies and cooling system

The invention relates to parting tools with a cutter carrier and exchangeable cutting bodies, in which the end facing the workpiece has a recess with wedge-shaped seats for the cutting body and a recess at the tip and the body of the cutting body as in the tip A suitable wedge is designed with the same wedge angle - It deals with the cooling of the cutting _{bodies y} which are heated to high temperatures of up to 500 ° C and more during the cutting operation due to the cutting work. This temperature load is known to promote wear on the hard metal cutting body. Carbon atoms of the hard metal migrate from the surfaces of the cutting wedge; this becomes brittle and craters and cracks form. The cutting edges and corners round and break out.

It is known to reduce the wear on the hard metal cutting body by cooling. To this A nozzle injects a coolant into the working area. Because the space in the work area are narrow and, in particular, the flow of chips through the nozzle must not be hindered, the nozzle is usually quite a distance from the work area. This distance must be overcome by the coolant in free flight. This affects the accuracy, with which the coolant is brought to the work area. Cross the draining chips often the path of the coolant and divert it from the cutting body. Even with large quantities of cooling and Even in the case of flooding, often no and never enough coolant gets onto the chips that run off covered cutting body. This has a particular effect on grooving and parting off, where the working area is is often deep in the workpiece in a narrow, deeply cut groove and therefore special limited space prevail. It also makes the exact supply of coolant when moving Cutting tools difficulties such as rotating cutter heads on parting machines. The constant Disturbance of the coolant flow results in intermittent cooling. During the cooling flow interruption the cutting body is heating up in the highly stressed area of the cutting wedge especially strong, only to be quenched immediately afterwards by fresh coolant. This thermal cycling leads to comb cracks and promotes wear.

It is the object of the invention to remedy these disadvantages and for a continuous uniform To ensure cooling of the cutting body.

As a solution, the invention proposes a parting tool of the type mentioned at the beginning with a coolant inflow through the cutter carrier, which opens into the recess and its outlet opening the rear * end of the Cutting body is directed.

In this way, the coolant is brought to the cutting body and without interference from draining Chips or other influences continuously on the cutting body from a few millimeters away sprayed on, preferably on its rear or underside facing away from the engaging cutting wedge. This wets the majority of the cutting body surface to just below the flowing chips with coolant. In this way, continuous and uniform cooling of the Cutting wedges, as the cutting heat is quickly dissipated from there to the area of the cutting body, which is wetted with coolant. In this way, the cutting body is continuously and evenly cooled. In the case of grooving and parting tools, the secondary cutting edges and the Corners between main and secondary cutting edges are cooled, which is almost never reached due to the usual spray cooling and are therefore subject to particular wear and tear. Overall, the wear and tear of the Cutting insert significantly reduced by the proposed cooling.

C ·

The more detailed embodiment of the invention according to the subclaims deals with the coolant inflow for those parting tools whose cutter carriers can be inserted into an associated basic holder. With these, the coolant can flow through the body of the base holder via the contact surfaces of Insert holder and base holder enter the insert holder.

For sealing, the transition point is either the Exit of the coolant inflow from the base holder or the entry of the coolant inflow into the cutter carrier through a circumferential groove and a enclosed in the groove inserted elastic seal.

Provided that the cutter carrier can be moved lengthways in the basic holder can be that of groove and seal; surrounding outlet or inlet opening in the direction of displacement of the holder are elongated. This makes the coolant transition νοΉ the basic holder in the cutter holder even with different settings of the cutter holder.

A single cutter carrier can also have several cutter body seats with coolant outlet openings be provided according to this invention. However, one or more of the coolant outlet openings can be lockable. This is necessary if not all cutting bodies or cutting body seats have one such cutter carrier can be used at the same time for cutting work.

Some exemplary embodiments of the invention are explained in more detail below with reference to the accompanying drawings explained:

Figures 1 to 3 show the parting tool with a cooling system according to the invention, consisting of a basic holder and a cutter carrier as a holder for the exchangeable cutting body.

In FIG. 1 , for the sake of clarity, the |

assembled parting tool shown. The J

The cutter carrier (1O) is laterally in the basic holder \

(11) clamped. The five f is used to tension the plague.

Screws (12) against the roof-shaped top |

wedge clamped on the cutter carrier (13) - The * The cutter carrier can be moved lengthways in the basic holder

and so adjusted to the desired cutting depth *

will. It has wedge-shaped seats at both ends,

for the exchangeable cutting body (15).

Figure 2 shows the cutter carrier (10) from the side with wedge-shaped seats (14) for the cutter body (15). In the right upper seat there is a cutting body (15), while the left lower seat serves as a reserve and is only used when the right cbere seat has become unusable.

The cutting body (15) is inserted with its wedge-shaped body into the wedge-shaped seat (14). Because of the wedge-shaped design of the seat and body, it will hold there during the cutting operation without any further fasteners. There is one in the seat behind the cutting insert (15)

rounded recess (16). The one directed at the rear end of the cutting body (15) opens into this Outlet opening (17) for the coolant flow. she is via the inlet opening (18) in the middle of the lateral contact surface of the cutter carrier and by the coolant inflow shown in dashed lines (19) supplied with coolant by the cutter carrier body. Also leads to the lower left seat a dashed line coolant flow. the Exit opening is there through a not shown Stopper closed.

FIG. 3 shows the basic holder only with a view of the side with the clamping part for the cutter carrier. Since the cutter carrier has been removed, the contact surface of the basic holder for the cutter carrier is open. The outlet opening (20) of the coolant inflow guided through the base holder can be seen. This is widened to form a longitudinal groove (21) running in the direction of displacement of the cutter carrier. As a result, the transfer of the cooling liquid into the inlet opening (18) in the contact surface of the cutter carrier is ensured even with different settings of the cutter carrier. The longitudinal groove (21) is surrounded by a circumferential groove (22) into which an elastic seal (23) is inserted. This coolant outlet system is available twice in the contact surface of the basic holder so that the basic holder can be used in both directions.

Claims (8)

Schut ζ an 1. Parting tool with a cutter carrier (10) and exchangeable Cutting bodies (15), in which the At its end facing the workpiece, the cutter carrier has a recess with wedge-shaped seats (14) for the Cutting body (15) and then a recess on the seats (16) and the body of the cutting body (15) as ir * the seats (14) matching wedge with the same wedge angle formed is characterized by a coolant inflow (19) through the cutter carrier (10), which opens into the recess (16) and its outlet opening (17) on the rear, facing away from the cutting wedge; e End of the cutting body (15) is directed. 2. Parting tool according to claim 1, the cutter carrier (10) of which can be inserted into a basic holder (11), characterized in that the coolant inflow through the body of the basic holder (11) via the contact surfaces of the cutter carrier (10) and the basic holder (11) enters the cutter carrier (10). 3. Parting tool according to claim 2 characterized by one around the outlet (20) of the coolant inflow from the base holder (11) or around the inlet of the coolant flow into the cutting edge bearing Groove (22) and an elastic seal (23) inserted into the groove. 4. Parting tool according to claim 3, characterized in that the groove (22) and Seal (23) surrounding outlet opening (20) or inlet opening in the direction of displacement of the cutting edge carrier (10) is elongated in the base holder. Ill · ■ · » 5. parting tool according to claim 4 characterized by two outlet openings (20) or inlet openings arranged one behind the other in the displacement direction. 6. parting tool according to claim ¹ J characterized by two opposite, alternately closable inlet openings (l8) in the cutter carrier (10}. 7. Parting tool according to Claims 1 to 6, characterized by a plurality of cutting body seats (I ¹ O with coolant outlet openings (17). 8. Parting tool according to claim 7, characterized in that one or more coolant outlets openings (17) are closable.