Tool heads for tools

Abstract

The present invention relates to a tool head (1) for a hydraulically actuated tool, the tool head (1) having, in a side view, a substantially C-shaped head body (3) with two C-legs (4, 5) located opposite each other along a longitudinal axis (x) of the tool head (1) and a connecting web (6) connecting the C-legs (4, 5), a second tool carrier (8) is displaceable from an initial start position located away from a first tool carrier (7) across a device jaw (11) of the C-shaped head body (3) towards a terminal working position adjacent to the first tool carrier (7), the connecting web (6) having a number of through holes (12, 13, 14, 15) located next to each other along the longitudinal axis (x), adjacent through holes (12, 13, 14, 15) being separated by material struts (17, 18, 19), and the head body (3) of the tool head (1) is manufactured by a metal casting process.

Description

Technical Field

[0001] The present invention relates to a tool head for tools, particularly for hydraulic actuating tools. The tool head has a substantially C-shaped head body with two C-legs that are essentially opposed to each other along the longitudinal axis of the tool head in a side view, and a connecting web connecting the C-legs. The first C-leg has a first tool carrier for receiving a first tool part, and the second C-leg has a second tool carrier for receiving a second tool part. The second tool carrier is provided on the tool head so as to be displaceable relative to the first tool carrier. Thereby, the second tool carrier can be displaced from an initial starting position away from the first tool carrier to a working position at the end adjacent to the first tool carrier while crossing the device jaws of the C-shaped head body. And, when viewed from a side orthogonal to the longitudinal axis of the tool head, the connecting web has a plurality of through-holes arranged along the longitudinal axis, and adjacent through-holes are separated by material struts Furthermore, the head body of the tool head is manufactured using a metal casting process.

[0002] The present invention further relates to a method for manufacturing a tool head of this type.

Background Art

[0003] Tool heads of the type described above are known in various configurations in the prior art. Together with corresponding tool parts, the tool head is used, for example, for pressing, cutting, and drilling a workpiece to be processed. For example, such a tool having a tool head is disclosed in Patent Document 1 and also disclosed as Patent Document 2.

[0004] The general type of tool head described in claim 1 is further disclosed in Patent Document 3.

[0005] In addition, it is known that the tool head can be given a basically integrated and materially uniform design. The tool head can be connected directly or indirectly via an adapter equipped with a hydraulic power unit, preferably by a cylinder structure in the longitudinal axis direction. The tool can be designed as a handheld tool, basically with a rod-shaped outer tool base that enables handheld operation of the tool, or alternatively, it can be designed as a tool equipped with a hydraulic power unit that is provided separately and connected to the tool head via a hydraulic hose. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] European Patent No. 1084798 [Patent Document 2] U.S. Patent No. 6,718,870 [Patent Document 3] Strength Specification No. 6,619,101 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Building upon the prior art described above, the current invention aims to further develop the aforementioned types of tool heads, focusing on achievable lightness and operational safety. In particular, its objective is to prevent parts of the head body from detaching when the tool head reaches the end of its service life and the head body breaks, otherwise this could cause serious harm to the tool user.

[0008] The objective of the invention relating to through holes that follow the arch shape of the connecting web, rather than being straight lines parallel to the longitudinal axis of the tool head, is first achieved by the content of claim 1. The objective of designing the through-hole as a linear extension of the device jaw with respect to the longitudinal axis is further achieved by the contents of claim 2. The object of the invention relating to the edge region of a connecting web located away from the device jaw by a through hole, having an edge height perpendicular to the longitudinal axis which is 20% to 40% of the opening height of the through hole, is further realized by the content of claim 3. Finally, from an inventive standpoint, this is realized by the content of claim 4 of the present invention, particularly focusing on manufacturing the head body of the tool head by investment casting of steel or titanium. Therefore,The tool head can be manufactured from steel or titanium. Tool heads manufactured using metal processes have a density similar to conventionally forged steel, but their manufacture is more cost-effective. In particular, when manufactured using hardened or tempered steel within an investment casting framework, it is possible to achieve a design for tool heads that is preferably free of shrinkage cavities, or at least has reduced shrinkage cavities. Alternatively, the tool head can be made even lighter by using a titanium-based alloy.

[0009] The connecting web of the tool head, in a side view along the longitudinal axis of the tool head, has multiple through-holes with openings aligned along the longitudinal direction. These through-holes help to interrupt cracks in the connecting web that may occur due to aging, for example, otherwise the connecting web would penetrate completely to the edge region facing the opposite side of the device jaws of the head body, potentially causing a portion of the tool head to be thrown off or at least detached. The aforementioned through-holes can, on the one hand, lead to a significant reduction in the weight of the tool head, and on the other hand, can compensate for any instability caused by shrinkage cavities in the casting material, thus advantageously improving the formation of tool heads from cast metal. The through-holes introduced in this way into the connecting web result in an improved topology, allowing the tool head to be reduced to a basic structure that ensures the necessary stability for the loads or forces it typically maintains. In exemplary embodiments, such tool heads are actually suitable for forces exceeding 100 kN, for example, 120 kN or more. A significant reduction in weight can be achieved by reducing the material volume through through-holes that constitute recesses in the material inside the connecting web, and the aforementioned structure of the connecting web with through-holes can further provide advantageous fracture behavior. In this case, the material savings achieved by the through-holes are limited by the required strength and rigidity of the tool head.

[0010] Within the framework of the metal casting process, the overall geometric shape of the tool head body is achieved in a manner that would not be possible through the use of conventional manufacturing processes such as forging. Here, through holes are introduced into the tool head, particularly its connecting web, in a manner that maintains the basic support structure of the original geometric shape without through holes. For example, through holes can reduce the weight of the tool head by more than 25% by actual measurement compared to the original shape.

[0011] In particular, for safety features provided by the through-holes, at least one through-hole is formed directly in the portion of the connecting web that is adjacent to and parallel to the device jaws of the head body, and especially parallel to the device jaws with respect to the longitudinal axis of the tool head. This design ensures that cracks originating from the device jaws of the tool head terminate at the through-hole and do not reach the outer edge region of the connecting web. Therefore, even if cracks develop due to the tool head reaching the end of its service life, the portion of the connecting web further away from the device jaws remains intact. The portion of the connecting web away from the device jaws remains intact. This effectively prevents any part of the tool head from detaching, shaking off, or falling.

[0012] In addition, the edge region of the connecting web, which is located away from the device jaw by the through-hole, can be provided to have an edge height perpendicular to the longitudinal axis, which is 20% to 40% of the opening height of the through-hole. As a result, the material thickness of the edge region remaining adjacent to the through-hole on the outer edge of the connecting web becomes considerably smaller than the opening height of the adjacent through-hole. However, the ratio between the height of the material recess of the through-hole and the adjacent edge region of the connecting web is dimensioned to any ratio that ensures the stability required for the tool head.

[0013] The connecting web comprises 3 to 5, particularly 4, through-holes arranged in an arch shape from the first C-leg to the second C-leg when viewed from a side view across the longitudinal axis of the tool head. As a result, the through-holes can be arranged substantially along the C-shape of the tool head. Thus, a star-shaped arrangement of through-holes can occur around the geometric center as one proceeds from the geometric center with respect to a side view of the C-shape of the head body. The through-holes proceed from the device jaws and extend radially with respect to the edge region of the connecting web opposite the device jaws, but do not penetrate the material remaining in the edge region. The arched arrangement of through-holes around the device jaws allows for the effective interruption of cracks originating from any point on the device jaws, thereby preventing them from completely penetrating the connecting web and instead terminating at a through-hole adjacent to the device jaws.

[0014] Two or more material supports can be arranged so that their longitudinal central axes radiate outwards, and they are far apart from each other in the region of the material supports away from the device jaw.

[0015] Furthermore, one, more, or all of the through-holes are designed to extend from the device jaws of the head body to the edge region of the connecting web on the opposite side of the device jaws of the head body. Thus, the through-hole expands radially outward from the center of the device jaw, thereby forming a recess in the material over a relatively larger area toward the outer edge region of the connecting web. This prevents the stability of the head body from being diminished by surrounding the device jaw of the head body with a relatively large amount of material. At the same time, the recess in the material of the through-hole reduces the weight of the tool head. In particular, this expansion is achieved by two, three, or all of the interrelated material struts arranged radially.

[0016] Regarding the design of the material struts, it is further proposed that, from the perspective of traversing the opening plane of the through-hole, the material struts have a strut width corresponding to about 10% to 50% of the opening width of the through-hole. As a result, the material struts formed between the through-holes are considerably thinner than the width of the through-holes. Therefore, the probability that a crack generated from the device jaw of the head body terminates at the through-hole is considerably higher than the probability that the crack reaches the material strut or the probability of radially penetrating the entire connecting web that causes a part of the tool head to fall off.

[0017] Along with this, it is proposed that, in particular, one, a plurality, or all of the material struts basically have a constant strut width from the device jaw of the head body to the edge region of the connecting web on the opposite side of the device jaw of the head body. As a result, the material strut is preferably not wider than the edge region facing the outside of the connecting web adjacent to the device jaw, so that the above-mentioned transition region between the device jaw and the material strut becomes as narrow as possible, and the probability of damage caused by cracks is particularly low. In a special embodiment, the material strut can be provided to expand as it advances from the device jaw, so as to increase the stability in the outer edge region of the connecting web.

[0018] Alternatively, from the perspective of traversing the opening plane of the through-hole, a material strut having a basically constricted shape may be provided. In that case, as it advances from the device jaw of the head body to the edge region of the connecting web on the opposite side of the device jaw of the head body, it first tapers and then expands again. In this embodiment, the material strut can be tapered in the central region in its longitudinal direction, thereby further reducing the weight of the tool head. In addition, in relation to this, a wider design in the transition region to the device jaw along the end region of the connecting web away from the device jaw makes it possible to maintain a stable basic shape of the tool head.

[0019] Furthermore, the through-holes may be designed to have an opening width corresponding to approximately 50% to 100% of the width of the device jaws of the head body, with respect to a direction parallel to the longitudinal axis of the tool head. In this embodiment, one of the multiple through-holes may have a particularly large opening width, so that the through-hole extends along a large portion of the longitudinal direction of the device jaws, and any cracks originating from the device jaws in some event will terminate at the through-hole and not reach the material support. As a result, one of the multiple through-holes may be designed to be considerably larger, for example, wider, with an opening width, for example, twice as large, depending on the structural design of the tool head and the specific loads on the material in a particular region of the device jaws.

[0020] Finally, in addition to the tool heads described above, we propose a method for manufacturing the head body of the tool head by metal casting. In particular, we propose that the head body be manufactured by investment casting of steel or titanium. Investment casting may include casting by the lost-wax method. As an alternative to wax, the prototype initially made for this purpose and subsequently surrounded by the molding material may also be made of some other molten material, such as plastic. [Brief explanation of the drawing]

[0021] The present invention will be described below with reference to the drawings, but the latter part will only depict exemplary embodiments. Therefore, some of the tool heads depicted are shown only in relation to one of the exemplary embodiments, but can also be applied to additional exemplary embodiments of the invention, and are shown as at least possible for additional exemplary embodiments. These are shown in detail in the drawings. [Figure 1] Figure 1 shows a tool equipped with the tool head of the present invention in a first embodiment. [Figure 2] Figure 2 shows a side view of the tool. [Figure 3] Figure 3 shows a longitudinal section of the tool head. [Figure 4] Figure 4 shows a top view of the tool in Figure 1. [Figure 5] Figure 5 shows a tool equipped with the tool head of the present invention in a second embodiment. [Figure 6] Figure 6 shows a side view of the tool. [Figure 7] Figure 7 shows a longitudinal section of the tool head. [Figure 8] Figure 8 shows a top view of the tool in Figure 2. [Modes for carrying out the invention]

[0022] The figures shown below illustrate two different possible embodiments of tool 2, with Figures 1-4 relating to the first embodiment and Figures 5-8 relating to the second embodiment. Additional and alternative embodiments are also possible, and therefore Figures 1-8 should not be interpreted restrictively, but rather serve to illustrate possible features.

[0023] First, Figure 1 shows a tool 2 having a rod-shaped outer tool base. A battery 22 for supplying power to the tool 2 is located in its free end member 21. For example, the tool 2 is a hydraulically operated crimping tool 2. However, alternatively, the tool 2 may be replaced with one used for other purposes, such as cutting or drilling a workpiece. The outer tool base 20 further includes a handle 23 for the user to move the tool 2. In addition to the handle 23 of the outer tool base 20, the tool 2 may further have other handle parts not shown herein, thereby enabling safe movement and gripping, for example, particularly heavy tools 2, especially when one-handed operation is not possible due to their weight. In particular, the present invention proposes a tool 2 comprising a separately designed unit, in particular a separately designed power supply device, a separately provided hydraulic power unit connected to the tool head 1 of the tool 2 by a hydraulic hose, or other similar. As shown in the figure in the embodiment, the tool head 1 of tool 2 is connected to the hydraulic power unit via an adapter 24 and is combined with the outer tool body 25 of tool 2.

[0024] The tool head 1 of tool 2 has a head body 3 that is an overall integrated design. In a side view of Figure 2 or Figure 3, where the longitudinal axis x of tool 2 or tool head 1 is depicted as a straight line, the head body 3 may have a substantially C-shaped design. The head body 3 has a first C-leg 4 and a second C-leg 5, which are connected by a connecting web 6 formed substantially parallel to the longitudinal axis x. Similar to the connecting web 6, the two C-legs 4 and 5 span the entire device jaw 11, into which the workpiece to be machined by the tool 2 can be introduced. The first C-leg 4 is equipped with a first tool carrier 7. The second C-leg 5 is equipped with a second tool carrier 8. Here, the first tool carrier 7 is designed integrally with the first C-leg 4, while the second tool carrier 8 is displaceable within the device jaw 11 relative to the first tool carrier 7. For example, the second tool carrier 8 can be hydraulically displaced by a hydraulic piston 26 which is linearly displaced by the outer tool body 25.

[0025] Each of the two tool carriers 7, 8 is preferably used to removably receive tool sections 9, 10, with the first tool carrier 7 supporting the first tool section 9 and the second tool carrier 8 supporting the second tool section 10. To secure the tool sections 9, 10 to their assigned tool carriers 7, 8 in a removable manner, the tool sections 9, 10 and the tool carriers 7, 8 are provided with corresponding retaining means 27, 28. For example, each tool section 9, 10 may be latched by the corresponding tool carrier 7, 8. In addition, the second tool carrier 8, which is particularly linearly slidable and attached to the outer tool body 25, can be removed from the head body 3 of the tool head 1 by passing through the device jaws 11.

[0026] The tool head 1 has multiple through holes 12, 13, 14, and 15 on the connecting legs 6, which are separated from each other by material supports 17, 18, and 19. As can be seen, for example, in Figures 2 and 3, the openings of the through holes 12, 13, 14, and 15 are located parallel to the plane in which the head body 3 forms a C shape. Apart from the through holes 12, 13, 14, and 15, a narrow edge region 16 remains outside the connecting web 6, ensuring the stability of the tool head 1. As can be seen in more detail in Figure 3, the edge region 16 has an edge height r, which corresponds to approximately 25% of the opening height h of the through holes 12, 13, 14, and 15. The material supports 17, 18, and 19 located between the through holes 12, 13, 14, and 15 have a slightly constricted shape, where each material support 17, 18, and 19 extends from the device jaws 11 to the edge region 16 of the connecting web 6. The width d of the central support column in the narrowest region of the constricted shape of the material support columns 17, 18, and 19 is approximately 20% of the opening width b of the adjacent through holes 12, 13, 14, and 15. Of the four through-holes 12, 13, 14, and 15 combined, through-hole 13 is clearly particularly large and has an opening width b and opening height h that are clearly larger than those of the remaining through-holes 12, 14, and 15. With respect to the direction parallel to the longitudinal axis x, through-hole 13 extends substantially along the total width z of the device jaw 11. As a result, cracks 11 originating from the device jaws 11, for example, caused by the tool head 1 reaching the end of its service life, are blocked with considerable certainty by the through holes 13, thereby preventing them from reaching the edge region 16 of the connecting web 6. Depending on the geometric shape of the head body 3, the material supports 17, 18, and 19 are positioned such that cracks originating at the edge of the device jaws 11 typically do not reach the material supports 17, 18, and 19, but rather reach the through holes 12, 13, 14, and 15. Consequently, the size of the through holes 12, 13, 14, and 15 with specific opening widths b and opening heights h reduces the weight of the tool head on the one hand, and prevents crack growth as soon as a crack reaches the through holes 12, 13, 14, and 15. With this ingenious manufacturing method of tool head 1 by metal casting, even damage and cracks resulting from casting defects such as shrinkage cavities become less critical. For example, tool head 1 is manufactured from steel or titanium within the framework of investment casting.

[0027] The through holes 12, 13, 14, and 15 follow the overall arch shape of the connecting web 6 and are not formed on a line parallel to the longitudinal axis x of the tool head. As a result, the distance between the through holes 12, 13, 14, and 15 and the device jaws 11 is essentially maintained, thereby substantially reducing the probability of unwanted crack propagation along the periphery of the device jaws 11.

[0028] Figures 5 to 8 show an alternative design for the tool head 1 in the present invention. This tool head 1 also has four through holes 12, 13, 14, and 15, but is smaller in design than the through holes 12, 13, 14, and 15 in Figures 1 to 4, and has mutually approximate opening widths b and opening heights h. As a result, the tool head 1 is more stable overall and can withstand a greater load compared to the tool head 1 in the first embodiment. In addition, as is particularly evident in Figures 6 and 7, the material supports 17, 18, and 19 have substantially the same support width d along their longitudinal extension. Otherwise, the through holes 12, 13, 14, and 15 in the exemplary embodiments of Figures 5 to 8 also follow an arch shape along the periphery of the substantially C-shaped head body 3.

[0029] The foregoing serves to describe the inventions contained in the entire application documents, each independently advancing the prior art, at least through combinations of its features, and two, more, or all of these feature combinations can also be combined. Specifically, these are as follows:

[0030] A tool head 1 for a tool 2, characterized in that the head body 3 of the tool head 1 is manufactured in a metal casting process.

[0031] A tool head 1 for a tool 2, characterized in that the head body 3 is manufactured from steel or titanium.

[0032] A tool head 1 for a tool 2, characterized in that the edge region 16 of the connecting web 6, which is located away from the device jaw 11 by through holes 12, 13, 14, 15, has an edge height r perpendicular to the longitudinal axis x, which is 20% to 40% of the opening height h of the through holes 12, 13, 14, 15.

[0033] A tool head 1 for a tool 2, characterized in that the connecting web has 3 to 5 through holes 12, 13, 14, and 15, and is arranged in an arch shape from the first C leg 4 to the second C leg 5 when viewed from the side across the longitudinal axis x of the tool head 1.

[0034] A tool head 1 for a tool 2, characterized in that through holes 12, 13, 14, and 15 extend from the device jaws 11 of the head body 3 to the edge region 16 of the connecting web 6 on the opposite side of the device jaws 11 of the head body 3.

[0035] A tool head 1 for a tool 2, characterized in that the material support columns 17, 18, and 19 have a column width d that corresponds to approximately 10% to 50% of the opening width b of the through holes 12, 13, 14, and 15, from a viewpoint that crosses the opening plane of the through holes 12, 13, 14, and 15.

[0036] A tool head 1 for a tool 2, characterized in that the material supports 17, 18, and 19 have a substantially constant support width d over their entire length from the device jaws 11 of the head body 3 to the edge region 16 of the connecting web 6 on the opposite side of the device jaws 11 of the head body 3.

[0037] A tool head 1 for a tool 2, characterized in that the material struts 17, 18, and 19 have a substantially constricted shape in view across the opening plane of the through holes 12, 13, 14, and 15, and the material struts 17, 18, and 19 are initially tapered and then widen again along their entire length from the device jaw 11 of the head body 3 to the edge region 16 of the connecting web 6 opposite the device jaw 11 of the head body 3.

[0038] A tool head 1 for a tool 2, characterized in that the through holes 12, 13, 14, and 15 have an opening width b that corresponds to approximately 50% to 100% of the width z of the device jaws 11 of the head body 3, with respect to a direction parallel to the longitudinal axis x of the tool head 1.

[0039] A method for manufacturing a tool head 1, characterized in that the head body 3 of the tool head 1 is manufactured by metal casting, particularly investment casting of steel or titanium.

[0040] All disclosed features are essential to the present invention (both in themselves and in combination with each other). The disclosures of this application encompass the entirety of the disclosures of the relevant / attached priority documents (copies and earlier applications), and it is also for the purpose of incorporating the features of these documents into the claims of this application. Dependent claims feature independent inventive further developments of the prior art, even without the features of the cited claims, particularly for the purpose of filing a divisional application based on these claims. The invention specified in each claim may have one or more additional functions, particularly those specified in the preceding description, especially those to which reference numerals are assigned, and / or specified in the descriptions of the reference numerals. The present invention also relates, in particular, to embodiments in which individual features described above are not implemented, insofar as they are obviously unnecessary for their respective intended use or can be replaced by other means having the same technical effect. [Explanation of Symbols]

[0041] 1 Tool head 2 tools 3 Head body 4 C legs 5 C legs 6 Linked Web 7 Tool Carrier 8 Tool Carrier 9 Tool section 10 Tool section 11-device jaw 12 Through holes 13 Through hole 14 Through holes 15 Through holes 16. Border region 17 Material support 18 Material support 19 Material support 20 Outer Tool Base 21 End member 22 Storage batteries 23 Handle 24 adapters 25 Outer tool body 26 Hydraulic pistons 27 Retention means 28 Retention means b Opening width d Support width h Opening height r edge height x Long axis z width

Claims

1. A tool head (1) for a hydraulically operated tool, In a side view, the tool head (1) is A substantially C-shaped head body (3) having two C-legs (4, 5) positioned opposite each other along the longitudinal axis (x) of the tool head (1), It has a connecting web (6) that connects the C legs (4, 5), The first C-leg (4) is provided with a first tool carrier (7) for receiving a first tool section (9), and the second C-leg (5) is provided with a second tool carrier (8) for receiving a second tool section (10), the second tool carrier (8) is provided on the tool head (1) so as to be displaceable relative to the first tool carrier (7), so that the second tool carrier (8) moves from an initial starting position away from the first tool carrier (7) across the device jaws (11) of the C-shaped head body (3) and simultaneously across the first tool section The tool head (1) is displaceable toward the working position of the end adjacent to the rear (7), and comprises a plurality of through holes (12, 13, 14, 15) in which the connecting web (6) is positioned along the longitudinal axis (x) in a side view of the tool head (1) across the longitudinal axis (x), adjacent through holes (12, 13, 14, 15) are separated by material supports (17, 18, 19), and the head body (3) of the tool head (1) is manufactured by a metal casting process, The tool head (1) is characterized in that the through holes (12, 13, 14, 15) are arranged in a line along the arch shape of the connecting web (6) from the first C leg (4) to the second C leg (5), and there are no straight lines parallel to the longitudinal axis (x) of the tool head (1) that pass through all of the through holes (12, 13, 14, 15).

2. A tool head (1) for a hydraulically operated tool, In a side view, the tool head (1) is A substantially C-shaped head body (3) having two C-legs (4, 5) positioned opposite each other along the longitudinal axis (x) of the tool head (1), It has a connecting web (6) that connects the C legs (4, 5), The first C-leg (4) is provided with a first tool carrier (7) for receiving a first tool section (9), and the second C-leg (5) is provided with a second tool carrier (8) for receiving a second tool section (10), the second tool carrier (8) is provided on the tool head (1) so as to be displaceable relative to the first tool carrier (7), so that the second tool carrier (8) moves from an initial starting position away from the first tool carrier (7) across the device jaws (11) of the C-shaped head body (3) and simultaneously across the first tool section The tool head (1) is displaceable toward the working position of the end adjacent to the rear (7), and comprises a plurality of through holes (12, 13, 14, 15) in which the connecting web (6) is positioned along the longitudinal axis (x) in a side view of the tool head (1) across the longitudinal axis (x), adjacent through holes (12, 13, 14, 15) are separated by material supports (17, 18, 19), and the head body (3) of the tool head (1) is manufactured by a metal casting process, The through holes (12, 13, 14, 15) are arranged in a line along the arch shape of the connecting web (6) from the first C leg (4) to the second C leg (5), and there is no straight line parallel to the longitudinal axis (x) of the tool head (1) that passes through all of the through holes (12, 13, 14, 15), and A tool head (1) characterized in that one through hole (15) is located in the first C leg (4).

3. A tool head (1) for a hydraulically operated tool, In a side view, the tool head (1) is A substantially C-shaped head body (3) having two C-legs (4, 5) positioned opposite each other along the longitudinal axis (x) of the tool head (1), It has a connecting web (6) that connects the C legs (4, 5), The first C-leg (4) is provided with a first tool carrier (7) for receiving a first tool section (9), and the second C-leg (5) is provided with a second tool carrier (8) for receiving a second tool section (10), the second tool carrier (8) is provided on the tool head (1) so as to be displaceable relative to the first tool carrier (7), so that the second tool carrier (8) moves from an initial starting position away from the first tool carrier (7) across the device jaws (11) of the C-shaped head body (3) and simultaneously across the first tool section The tool head (1) is displaceable toward the working position of the end adjacent to the rear (7), and comprises a plurality of through holes (12, 13, 14, 15) in which the connecting web (6) is positioned along the longitudinal axis (x) in a side view of the tool head (1) across the longitudinal axis (x), adjacent through holes (12, 13, 14, 15) are separated by material supports (17, 18, 19), and the head body (3) of the tool head (1) is manufactured by a metal casting process, The edge region (16) of the connecting web (6), which is located away from the device jaw (11) by the through holes (12, 13, 14, 15), has an edge height (r) perpendicular to the longitudinal axis (x), which is 20% to 40% of the opening height (h) of the through holes (12, 13, 14, 15), and The tool head (1) is characterized in that the material support columns (17, 18, 19) have a column width (d) that corresponds to approximately 10% to 50% of the opening width (b) of the through holes (12, 13, 14, 15) when viewed from a viewpoint that crosses the opening plane of the through holes (12, 13, 14, 15).

4. The tool head (1) according to claim 1 or 2, characterized in that the edge region (16) of the connecting web (6), which is located away from the device jaw (11) by through holes (12, 13, 14, 15), has an edge height (r) perpendicular to the longitudinal axis (x), with a length of 20% to 40% of the opening height (h) of the through holes (12, 13, 14, 15).

5. The tool head (1) according to any one of claims 1 to 4, characterized in that the connecting web (6) has three to five through holes (12, 13, 14, 15), and these are arranged in an arch shape from the first C leg (4) to the second C leg (5) when viewed from a side of the tool head (1) across the longitudinal axis (x).

6. The tool head (1) according to any one of claims 1 to 5, characterized in that the through holes (12, 13, 14, 15) extend from the device jaw (11) of the head body (3) to the edge region (16) of the connecting web (6) on the opposite side of the device jaw (11) of the head body (3).

7. The tool head (1) according to claim 1, 2, 4, or any of claims 5 to 6, without reference to claim 3, characterized in that the material support columns (17, 18, 19) have a column width (d) that corresponds to approximately 10% to 50% of the opening width (b) of the through holes (12, 13, 14, 15) when viewed from a viewpoint that crosses the opening plane of the through holes (12, 13, 14, 15).

8. The tool head (1) according to any one of claims 1 to 7, characterized in that the material supports (17, 18, 19) have a substantially constant support width (d) over their entire length from the device jaw (11) of the head body (3) to the edge region (16) of the connecting web (6) on the opposite side of the device jaw (11) of the head body (3).

9. The tool head (1) according to any one of claims 1 to 7, wherein the material support columns (17, 18, 19) have a substantially constricted shape in view across the opening plane of the through holes (12, 13, 14, 15), and the material support columns (17, 18, 19) are tapered first and then widen again along their entire length from the device jaw (11) of the head body (3) to the edge region (16) of the connecting web (6) on the opposite side of the device jaw (11) of the head body (3).

10. The tool head (1) according to any one of claims 1 to 9, characterized in that the through holes (12, 13, 14, 15) have an opening width (b) that corresponds to approximately 50% to 100% of the width (z) of the device jaw (11) of the head body (3) with respect to a direction parallel to the longitudinal axis (x) of the tool head (1).

11. A method for manufacturing a tool head (1) according to any one of claims 1 to 10, characterized in that the head body (3) of the tool head (1) is manufactured by investment casting of steel or titanium.

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