JPS60501051A - Cutting element fixing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Cutting element fixing device The present invention provides a cutting element with four clamp parts, particularly a throw-away insert, in a tool holder. It is a device for fixing, and it is equipped with a clamp arm, and the clamp arm is a cutting element. horizontally and vertically supported in the four parts of the clamp for the fixation of the A fixing unit connected to the tool holder in the clamping direction on the tool holder via the fixing unit 1 related to fixed equipment.

The clamping arm is usually a clamping unit designed as a clamping screw, for example. is pressed against the cutting element by is fixed to the cutting element accommodating part of. The four clamp parts and the housing part --- at least one One with multiple sides used for support and positioning of the Accurate positioning of the cutting element in the receptacle cannot be achieved due to Not possible. Therefore, during the machining operation of the cutting element, the cutting element may become attached to the receptacle, causing undesired movements. movements that make accurate machining of the workpiece to be machined at least difficult. and, in some cases, lead to destruction of the cutting element.

A cutting tool is already known from West German Patent Publication No. 2555035. A clamping arm with clamping fingers can each clamp a plurality of four clamps on an associated cutting element. against the clamp fingers which are supported by the A unique clamp quadrant is provided that accommodates the clamp fingers.

The present invention improves the conventional fixing device so that the tightening of the fixing unit is in the clamping direction, that is, in the cutting direction. Not only a forceful movement in the direction of the support surface of the element storage part, but also a forceful movement to ensure lateral contact of the storage part. The challenge is to develop it in such a way that it can also be used.

Despite the force acting in two different directions, the fixation device to be developed is relatively simple. It just needs to be simple and have few failures.

The problem is solved by a fastening device having the features of claim 1. in addition Therefore, the solution concept on which the present invention is based is particularly for the clamp arm that engages in the clamp recess. consists of at least two mutually elastically movable ramp fingers; The ramp finger is placed in the [1111 direction of the cutting element transverse to the clap direction or in the two Cutting requirements in the clamping direction of the holder, that is, in the direction of the supporting surface of the cutting element housing part mentioned above. It is about providing genuine support. This means that the clamp fingers separate the clamp fingers from each other. L-, mutually movable formed by a gap located outside the clamping plane The essential feature of the object of the invention is that it relates to a common clamping recess. The clamp fingers to be inserted are not lined up when viewed from the clamp direction, but are positioned overlapping each other. be.

The clamp fingers, namely the preload finger and the main clamp finger, are fixed, and the latter has a preload finger first. Lateral abutment of the cutting element in the receptacle is subsequently carried out via the main clamping fingers. Before the final fixation by crimping of the cutting element in the direction on the supporting surface will be maintained.

In this case, the movement clearance of the clamping fingers can be adjusted in a simple manner to the outside of the clamping plane. The height of the gap separating the clamping fingers from each other in the direction of clamping.

From the end part of the crank arm in the area of the clamping recess in the direction of the fixing unit The length of the starting gap is determined by the spring properties of the material used.

In a preferred embodiment, the clamp arm l, is partially slit and its As a result of this, the clamp fingers will not be able to secure the crank arm under external forces in the range of the resulting clearance. (Claim 2). However, the clamp finger is integrated and fix the clamp finger outside the gap range directly or indirectly through an intermediate member. (Claim 5). Fixation of individual parts can be done, for example, by screws or connections. This can be done by gluing, welding or brazing. The advantages of this embodiment are particularly Are the individual parts forming the clamping fingers made of materials with different properties, especially spring properties? It lies in the fact that it can be made up of.

In particular, a preload finger used as a preload element, for example, can be attached to a spring 4. It can be made from steel (claim 5).

The object of the invention is that the gap between the clamping fingers is at least partly in particular in its longitudinal extension. This is satisfied by filling a portion with an elastic material (claim 4). section). Elastic materials, especially rubber or suitable synthetic resins, can be used for vibration isolation and/or to reduce gaps during the cutting process. can be used to prevent soiling.

The strength ratio between the preload finger and the main clamp finger is depending on the respective desired force in the direction of the pull. Preferably the preload finger is - in the clamping plane. The main clamping fingers also have a small material thickness when viewed in this direction (claim 6).

The length of the gap between the clamp fingers is reasonable so that the gap is from one clamp recess to the fixed unit - designed to end just before the fixed unit in any case ( (Claim 7), the sealing gap extends to the range of the reservoir hole of the fixing unit or Depending on the circumstances, it may extend beyond the hole.

To ensure the desired action of the clamp fingers on the cutting element, the clamp fingers and The gap separating the ramp fingers is bent towards the cutting element in the area of the cutting element (as requested). Scope of Request Section 8).

The positioning of the cutting element with respect to the tool holder may be determined by m-clamp fingers and clamps. One of the clamp fingers is behind the clamp recess facing the fixing unit. This can be further improved by additionally supporting the outside of the wall on its side walls. (Claim 9). In this case, the width of the relevant clamp finger is the width of the clamp recess. matches. In an embodiment with only two clamps according to the form of the clamp fingers. (i.e. the main clamp finger and the preload finger) The preload finger is preferably clamped only in a linear manner. It is formed so as to come into contact with the rear wall of the pump recess (Claim 10).

Each primary clamp finger advantageously connects the clamp recess through the end facing the base of the clamp recess. (Claim 11).゛However, it got stuck in the clamp recess. It is also possible to form the retaining portion of the clamp arm into a spherical shape (see claim 1). Section 12).

The object of the invention uses a cutting element with four clamping parts formed in a particular way. Without being limited to this, the clamp recess may be shaped, for example, in the shape of a spherical cutout, or in some cases circularly moved. It can be arbitrarily formed into a rectangular shape with rows, a pyramid, or a truncated conical shape. .

Only in this configuration, the retaining part of the clamp arm may a main clamp finger and a preload finger which are adapted to the part and thereby form the clamp arm; It is essential that they are able to meet the challenges imposed on them.

The objects of the invention will now be explained in detail based on the illustrated embodiments.

Figure 1 is a longitudinal cross-sectional view of a cutting tool in which two clamp arms have two clamp fingers. , Figures 2a and 2b show two clamping fingers in the area of the throw-away tip. A partial cross-sectional view of the clamp arm, Figures 5a and 3b are partial longitudinal sections of a throw-away tip with a spherical clamp recess. side view, Or a sectional view along the line ■-■ in Figure 5a, Figures 4a and ab are truncated pyramid-shaped cubes. Partial longitudinal sectional view of a throw-away chip with a lamp recess, or TV- of FIG. 4a. FIG. 3 is a sectional view taken along the TV line.

The cutting tool (shown in FIG. 1) has a receptacle 2 as an essential component. A fixing unit (not shown) in the form of a holder, a throw-away tip 6, and a clamp screw. It has a clamp arm 4 with a fixing hole 4' for the lock. clamp screw - Possibly below the intermediate insertion of the spring element - located in the upper part of the hole 4 via a guide part It is supported by the mind-alarming part 4'' that is placed.

The clamp arm 4 may have a tool holder on the opposite side from the throw-away tip 6. The support leg 5 rests on the carrier.

The throw-away tip 6 with the clamping recess 6 has a support surface 7 at the bottom on the one hand. via and on the other hand at least one separation surface 8 as well as a fixing unit or hole 4' It is held through the rear wall 9 of the receiving part facing .

The clamp arm 4 is an engaging portion that engages in the clamp recess 6 when viewed in the direction of the 1' hole 4'. Starting from 10, one gap 11 is provided, and the gap ends in front of the closing hole 12 and the inner hole 4'. and perpendicular to the clamping plane, i.e. perpendicular to the drawing plane. Zuhei The clamp plane located on the surface simultaneously indicates the direction of the clamp to be tightened on the tool holder 1. It is identified by arrow 13.

The clamp arm 4 is constrained by the gap 11 and faces the throw-away tip B. There are two clamping fingers in the area, namely the upper large dimension main clamping finger 14 and the lower It has a thin preload finger 15 on the other side. The form of the gap 11 is preferably that of the clamp arm 4. , and the same applies especially to the preload finger, taking into account the corresponding part of the clamp recess 6. It also applies to 15 forms. Pulling the fixing unit (not shown) in the direction of tool holder 1 During tightening, the preload finger 15 is particularly pressed in the direction of clamping (arrow 16) to the rear wall 9 of the housing part 2. The main clamping finger 14 causes lateral abutment of the lateral throw-away tip 3. The throw-away tip is inserted through the end portion 14' of the clamp recess 6 facing the base surface 6'. 6 and thereby support the receiving part 2 on the support surface 7 in the clamping direction. Do this. The already mentioned main clamp finger 14 and preload finger 8 The dimensions of 15 and 15 respectively depend on the forces acting. The movement gap between both clamp fingers is specified by the gap height h (see Figure 2) parallel to the pump plane (arrow 13). It is.

The operation of the clamping fingers 14 and 15 during the clamping process is clarified on the basis of FIG. . Before tightening the fixing unit in the direction of arrow 13 (Fig. 1), insert the throw-away tip. 5 rests on the support surface 7 without touching the rear wall 9 of the housing. Clamp finger end part 1 4' or 15' has a reed above the base surface 6' of the clamp recess 6, that is, the clamp finger is Only a portion of its engaging portion 14" or 15" engages the clamp quadrant. Fixed unit By tightening the knit, the clamp arm moves in the direction of arrow 1 with clamp fingers 14 and 15. 3 onto the tool holder, thereby causing the engagement of the clamping fingers 15. Under the action of the mating portion 15'', the throw-away tip 6 is taken to the right and finally reaches a predetermined position. It is held on the rear wall 9 by force.

The clamping process continues until finally the main clamp is moved to the clamping position represented by the dotted line in Figure 2b. In the clamping position, the end portion 15' is moved with a predetermined force. Place the fourth part of the clamp on the base 6' of the clamp. During the movement of the primary clamp finger to the clamp position The position of the preload loss 15 remains virtually unchanged. By using materials with suitable spring properties This allows relative movement between the clamp fingers.

The clamping force exerted on the clamp arm 4 by the fixing unit is applied to the tool holder. 1 or the sides of the throw-away tip to faces 7 and 9 of the associated housing 2 (Fig. 1) It serves both abutment and support. This overlapping clamp in the lateral and vertical 1b direction is used as a slow during processing. This ensures complete fixation of the wafer tip 6.

The configuration of the clamping fingers 14 and 15 in the area of the clamping recess 6, i.e. the respective end portion 1 The form of 4 or 15 can be arbitrary and in any case the shape of the clamp recess itself Affected by form. The clamp recess is especially suitable for the throw-away tip as much as possible. It can be produced simply and inexpensively, for example by pressing.

In the embodiment shown in FIG. 6, the throw-away tip 6 has a spherical clamping recess 6. The engaging portions 14'' and 15'' of the clamp fingers 14 and 15 are adapted to have a spherical surface.

Both clamp fingers have a spherical part, and the end part 14' of the main clamp finger 14 has a spherical part. It is arranged so as to rest on the throw-away tip 6-hi within the range of the center axis 6''. There is. The width of the clamping fingers 14 and 15 (FIG. 3b) is such that the width practically fills the bulbous portion; In other words, it is selected so that it also comes into contact with the sides.

In the embodiment shown in FIG. The clamping fingers 14 and 15 have a clamping recess 6 in the engaging portion 14" or 15". However, their cross sections are also different.

If the illustrated cross-section of the primary clamp finger 14 has a circular engagement portion 14'', the preload finger The corresponding cross section of 15 is adapted to the associated inclined surface of the clamping quadrant 6. That person Constrained by the configuration of the joint, the main clamp fingers 14 are clamped exclusively near the central axis 6''. It is supported linearly on the base surface A of the lamp recess. Shape of the main clamp finger transverse to the drawing plane In this state (Fig. 4b), the retaining portions 14'' on the four parts of the clamp completely fill the clamp recesses. In other words, it also acts on the horizontal fixation with respect to the drawing plane of the throw-away chip. Adapted. On the other hand, the preload finger 15 has a circular arc horizontally with respect to the drawing plane (Fig. 4b). is shaped and as a result contacts the wall 6'' of the clamping recess 6.

Unlike the embodiment shown in FIGS. 1 and 2, the clamping arm is separated from the individual parts. a plurality of clamping fingers consisting of They can be made of different materials.

In particular, the preload finger 15 (in contrast to the main clamp finger 14) is made of spring steel. be able to.

The operation and handling of the fastening device according to the invention is particularly advantageous if the gap 11 is at least in its longitudinal extension. This can be improved by partially filling the top with rubber. this This means, on the one hand, damping the vibrations generated during the cutting process and, on the other hand, preventing possible contamination. This prevents the gap 11 from being blocked.

The object of the invention is also for use with cutting tools and clamping arms of different shapes than those shown in FIG. can be used.

In the configuration of interest here, the clamp arm is also clamped, especially the clamp arm of the preload finger. A suitable configuration of the four parts of the lamp, especially the part that cooperates with the preload finger of the clamp recess, is important. The clamp recess is designed for precise alignment of the cutting tool housing. Allows fixation.

The shape of the clamp recess and preload finger is that the throw-away tip is a fixed unit. It is engaged so that it is also pressed against the side wall and the rear wall of the housing part when the seat is tightened. There must be. One of the essential advantages of the object of the invention is that the cutting element is a single clamp. Even if there is only a recess (Fig. 1) or no recess, the associated tool holder can be The main thing is that it can be fixed to the folder. Compounds located one behind the other in the clamping direction. Cutting of different shapes depending on the clamping arm with several clamping fingers The element can also be fixed, in which case the cutting element is inserted into the clamping finger. have matching configurations and a common clamp recess.

The use of the expressions "preload element" or "main clamping element" means that the clamping fingers in question are at least also preferentially or in principle have the described effects, but in some cases additionally other forms may also be used. The effect of the clamping element on the It should be stated that it does not exclude the ability to obtain horizontal support. be. For example, at least the main clamp finger may additionally include a clamp that accommodates the main clamp finger. In the cross section of the four parts, the main clamp fingers also contribute to fixing the cutting element in the horizontal direction. can be adapted to do so.

international search report ANNEX To T)l-INTERNATIONAL 5EARCHREP ORT O1 + NTERNATIONAL APPLrCA’L’ ON N o, PCT/EP 8310○102 (SA 4963) GB-A-810 197FR-A-1105369CB-A-584258None US-A-3526025C11109/70 NoneDE-A-12878 99 US-A-2962800None

Claims (1)

[Claims] 1 Cutting elements with clamping recesses, especially throw-away inserts, are secured to the tool holder. The device is equipped with a clamp arm, and the clamp arm is used to hold the cutting element. supported in its clamp recess for horizontal and vertical fixation, and Connect to the tool holder on the tool holder in the clamping direction via the fixing unit. In the device in which the clamp arm (4) engages in the clamp recess (6) It has a plurality of clamping fingers (14, 15), the clamping fingers being in the clamping plane of the fixing element. (arrow 13) located outside the clamping plane and separating the clamping fingers from each other. The gaps (11) between the two are formed so that they can move elastically with respect to each other. At least one of them is a preload element (15) that requires cutting transversely to the clamping direction. element (3) laterally abutting, and at least one other primary clamp finger (14) is the main clamping element of the cutting element in the clamping direction to the tool holder (1). A device, characterized in that it acts as a support. 2. The clamp fingers (14, 15) are fixed on the clamp arm (4) outside the gap range. 2. The device according to claim 1, wherein the device is transferred as a fixed component. 3 Clamping fingers (14, 1, 5) are made of a single part and have a small part outside the clearance area. 2. A device according to claim 1, wherein the devices are at least indirectly fixed to each other. 4. The gap (11) is at least partially elastic between the clamp fingers (14, 15) Any one of claims 1 to 3, filled with a material. The device described in. 5. Claim in which only the preload finger (15) acting as a preload element is made of spring steel. 4. The device according to item 1 or 4. 6. The preload finger (15) is closer to the main clamp finger (14) when viewed in the direction of the -clamp plane. Any of claims 1 to 5, having a material thickness that is less than The device described in one of the following. Z - m = looking at the direction of the fixing unit from the clamp recess (6), in any case Claim wherein a gap (11) is provided which ends just before the fixing unit. The device according to any one of items 1 to 6. a The clamp fingers (14, 15) and the gap (11) separating the clamp fingers require cutting. Claims 1 to 3, which are bent in the direction of the cutting element within the range of element (3). Apparatus according to any one of items up to 7. 9 At least one of the clamp fingers faces the fixing unit of the clamp recess (6) Claim 1 additionally supported on the side walls (6") of the rear wall (61) Any one of the eroticism from paragraph to paragraph 815 The device described in. The preload finger (15) contacts the back wall (6″) of the clamp recess (6) only in a line, Any of claims 1 to 9 having only two clamping fingers The device described in . 11. The end of each main clamp finger (14) facing the base (6') of the four clamp parts (6) Claims 1 to 10 are supported on the base surface in a plane via the portion (14'). 1. A device according to any one of 1. 12. The retaining part (14) of the clamp (4) that engages in the recess (6) Claims 1 to 1o, wherein rt, qs) are formed in a spherical shape. A device according to any one of the above. 13 The engaging part of the clamp arm (4) (14", 15" is the clamp arm (4) 6), any of claims 1 to 12 adapted to the form of The device described in one of the following.