WO2021017465A1

WO2021017465A1 - Cutter holder

Info

Publication number: WO2021017465A1
Application number: PCT/CN2020/077566
Authority: WO
Inventors: 苗祥; 秦鹏程
Original assignee: 苏州五元素机械制造有限公司
Priority date: 2019-07-30
Filing date: 2020-03-03
Publication date: 2021-02-04
Also published as: CN110396907A

Abstract

A cutter holder for a ground processing machine, especially a road milling machine, comprising a main body (4), a fastening device (5), a cutter head (7). The main body (4) has an accommodating portion (4.4), and the cutter head (7) is transformably arranged in the accommodating portion (4.4) of the main body (4) by means of the fastening device (5). The cutter holder facilitates the adjustment and replacement of different working surfaces of the cutter head.

Description

A tool holder

Technical field

The invention relates to a tool holder with replacement function for ground processing machines, especially road milling machines. The tool holder has a main body, a fastening device, and a tool head, wherein the main body has a receiving part, and the tool head is composed of a tool point, a head, and a supporting body, and the tool head is convertible through the fastening device. The mode is set in the receiving part of the main body.

Background technique

The road milling machine is a tool used to remove the road surface or renovate the road surface. In the process of use, especially the milling cutter needs to undergo a continuous wear process. If a certain wear state is reached, the tool needs to be replaced, because otherwise the next process is extremely inefficient. Milling cutters that need to be replaced in milling machines are very expensive.

The cutting device disclosed by 2015.08.06 (Patent No. DE102015112988.4) has a carrier on which a cutting insert is fixed, wherein the carrier has a base portion, and the base portion A holding accessory including a receiving part is protrusively installed on the upper part, wherein the cutting insert is at least partially arranged in the receiving part, and wherein a fixing accessory is arranged on a fixed side opposite to the holding accessory, so The cutting insert has a blade tip comprising a superhard material, and the holding attachment bears a hard material element in a region between the blade tip and the base part at least in the region of the front portion thereof in the feed direction. The cutting insert has a head on which the knife tip is fixed, and the head is at least partially composed of a material whose wear resistance is less than the knife tip but greater than the material of the holding accessory. The head is at least partially made of hard metal. The cutting insert has a rod part by which the cutting insert is inserted into the receiving part of the holding accessory. The cutting insert forms a concave transition in the transition area between the head and the stem, so that the receiving portion forms a convex transition in this area, and provides usefulness in the area of these two transitions. Interstitial areas filled with composite materials, especially solder. The head of the cutting insert widens from the tip of the knife in the direction of holding the attachment. The tip has a support body, which is connected to the head of the cutting insert, preferably welded, so that one or more intermediate layers are applied to the support body, on the outermost side of the intermediate layer facing away from the support body A covering layer is applied on top, and the material of the covering layer is harder than the material of the intermediate layer. The hard material element is formed by coating curing, such as surfacing welding, plasma coating curing, etc.; and/or the hard material element is formed by one or more hard material sections, and the hard material section is connected to the holding Accessory connection.

The above-mentioned cutting device is an integral structure, and its blade tip, cutting insert, and holding attachment are fixedly connected together by welding. The disadvantage is that the working wear of the three parts is always in one position, and the wear is uneven, resulting in an expensive tip The coating and cutting inserts have not yet fully utilized their functions, and the cutting device has to be replaced, resulting in huge waste.

Summary of the invention

In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a tool holder that can make full use of the wear-resistant material of the tool head, saves costs, and has a conversion function.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions:

A tool holder for a ground processing machine, especially a road milling machine, the tool holder having a main body, a fastening device, and a cutter head, the main body has a receiving part, and the cutter head is arranged in the main body in a transformable manner by the fastening device In the receiving part.

Preferably, the tool holder, wherein the tool head includes a tool tip, a head, and a support body; the support body of the tool head has a holding rod portion, and the holding rod portion has a second central axis L1, The cutter head is arranged in the receiving part of the main body through the holding rod part of the support body.

Preferably, in the tool holder, the receiving part of the main body has a first central axis L, and the first central axis L of the receiving part and the second central axis L1 of the holding rod are coincident.

Preferably, the tool holder, wherein the receiving portion of the main body has a concave fixing surface, and the prime line of the fixing surface forms an included angle α with the first central axis L, and the angle range of the included angle α is Between 3°-10°.

Preferably, the tool holder, wherein the holding rod portion has a holding surface, and the plain line of the holding surface forms an angle β with the second central axis L1, and the angle range of the angle β is 3°-10 °between.

Preferably, in the tool holder, the included angle α=the included angle β, so that the fixing surface and the holding surface form a conical fitting relationship.

Preferably, the tool holder, wherein at least two bearing surfaces are arranged around the central axis L1 on the holding rod portion of the supporting body, and each of the bearing surfaces is respectively aligned with the central axis L1 of the supporting body. The included angle γ is set; the angle range of the included angle γ is between 10°-20°.

Preferably, the tool holder, wherein after the holding rod portion of the support body is assembled into the receiving portion of the main body along the V direction, the fastening device is screwed into the threaded hole of the main body along the V1 direction by using its external thread , The pressing surface of the fastening device is attached to at least one of the at least two stress surfaces of the support body.

Preferably, the tool holder, wherein the supporting body has at least two limit block surfaces which are respectively on the same plane as the at least two force-receiving surfaces; the supporting body is installed in the receiving part. Bottom, at least two limit block surfaces and at least two limit groove surfaces on the main body are arbitrarily matched with each other, so as to adjust the rapid positioning of the cutter head when at least one of the at least two stress surfaces is pressed and fitted. .

Preferably, the tool holder, wherein the tip of the tip is at least partially made of cemented carbide material, the head is made of cemented carbide material, the support body is made of alloy material, and the tip and head , The hardness of the support body gradually increases against the V direction, and is hard-connected together by welding to form an overall state.

The beneficial effects of this case: The tool holder of this case has a main body, a fastening device, and a cutter head. The main body has a receiving part, and the cutter head is set in the receiving part of the main body in a transformable manner by the fastening device; in the actual working process , When one side of the cutter head is worn, and the rotating position of the cutter head needs to be adjusted, it can be quickly positioned to the side of the unworn cutter head, and due to the mutual adhesion of the limit block surface and the limit groove surface, the formation The form of interlock also further limits the tendency of the cutter head to loosen or fall off when working. Each limit block surface of the cutter head has been changed once to make it wear evenly. Under the condition of making full use of the wear-resistant material of the cutter head, the cost is saved, and the service life of the cutter tip, head, support body and main body Matching and coordination can make them reach their wear limit almost simultaneously with the best design. This achieves the economic benefits attached to the present invention. When each limit block surface is changed once, then the cutter head will be used to the best. At this time, a new cutter head can be replaced, and the new cutter head can also change the limit block surface to make it Wear evenly.

Description of the drawings

Figure 1 is an overall perspective view of the tool holder of the present invention;

Figure 2 is a front exploded view of the tool holder of the present invention and a partial cross-sectional view of the main body;

Figure 3 is a full cross-sectional view of the front side of the tool holder of the present invention;

Figure 4 is a bottom perspective view of the tool head of the tool holder of the present invention;

Figure 5 is a top perspective view of the tool head of the tool holder of the present invention;

Figure 6 is an oblique side perspective view of the main body of the knife holder of the present invention;

Fig. 7 is a front perspective view of the main body of the knife holder of the present invention.

Detailed ways

In the following, the present invention will be further described in detail with reference to the embodiments and drawings, so that those skilled in the art can implement it according to the text of the description.

Figures 1 and 2 show a tool holder with replaceable functions for ground processing machines, especially road milling machines. The tool holder has a main body 4, a fastening device 5, and a cutter head 7, wherein the main body 4 It has a receiving portion 4.4, and the cutter head 7 is fixed in the receiving portion 4.4 of the main body 4 in a convertible manner by a fastening device 5.

Preferably, the tool tip 7 includes a tool tip 1, a head 2, a support body 3. Because the working face 1.2 of the tool tip 1 is at the forefront of the milling road surface, the working face 1.2 of the tool tip 1 is coated with cemented carbide The material, such as polycrystalline diamond, is the hardest material known. The tool tip 1 is welded to the mounting surface 2.4 of the head 2 through its mounting surface 1.1. The head 2 is made of cemented carbide material, the hardness is lower than that of the tip 1, including the working surface 2.5. The head 2 is accommodated in the embedded part 3.5 of the support 3 through its mounting surfaces 2.1, 2.2, 2.3, and 2.6. The support 3 Composed of alloy material, the hardness is lower than that of the head 2, and it is also connected and fixed by welding. That is to say, the hardness of the tool tip 1, the head 2, and the support 3 gradually increase against the V direction, and is hardened by welding. Connected together to form a whole state.

In addition, the accommodating portion 4.4 of the main body 4 has a central axis L and a concave fixing surface 4.5, and the prime line of the fixing surface 4.5 forms an included angle α with the central axis L, and the included angle α ranges from 3°-10 It can be seen that the receiving part 4.4 forms a conical hollow chamber. In fact, the diameter of the conical hollow chamber gradually increases against the V direction.

At the same time, the support body 3 of the cutter head 7 has a holding rod portion 30 having a central axis L1, and the holding rod portion 30 has a holding surface 3.4, and the element line of the holding surface 3.4 forms an angle β with the central axis L1, which clamps The angle β is in the range of 3°-10°. Obviously, the holding rod 30 forms a cone shape, and it can be realized that its diameter gradually decreases along the V direction.

As can be seen in FIG. 3, the cutter head 7 is fixed in the receiving portion 4.4 of the main body 4 by the holding rod portion 30 of the supporting body 3. In addition, the central axis L of the accommodating portion 4.4 and the central axis L1 of the holding rod portion 30 are coincident, and the included angle α = the included angle β. Then, the fixing surface 4.5 and the holding surface 3.4 form a conical matching relationship. The advantage of this is that the direction force for installing the cutter head 7 and the force applied when the cutter head is working, the two directions are the same, and both are the direction V. Under the action of the force in the V direction, the tapered fit forms an interference fit relationship, and the fastening between the holding surface 3.4 and the fixing surface 4.5 increases as the force in the V direction increases.

As shown in Figures 3 to 5, the holding rod portion 30 of the support body 3 is provided with first to fourth stress surfaces around the central axis L1, which are 3.1.1, 3.1.2, 3.1.3, and 3.1.4 respectively. . In addition, the first to fourth force receiving surfaces are respectively arranged at an angle γ with the central axis L1 of the support body 3. In addition, the central axis L3 of the threaded hole 4.1 and the central axis L of the support 3 are arranged at an included angle δ. After the holding rod portion 30 of the support body 3 is assembled into the receiving portion 4.4 of the main body 4 along the V direction, the fastening device 5 is screwed into the threaded hole 4.1 of the main body 4 along the V1 direction using its external thread 5.2, and finally is tightened The pressing surface 5.1 of the device 5 is attached to any one of the first to fourth bearing surfaces of the support 3, and the first to fourth bearing surfaces are flat, so that the end of the fastening device 5 is pressed and supported Body, restricting all its degrees of freedom. The fastening device 5, usually a screw, will generate a force F along the V direction due to the effect of the included angle δ under the action of screwing and tightening, and the force F can further tighten the support body 3. Preferably, the included angle δ is 40°-80°.

As shown in Figures 4 to 7, the holding rod portion 30 of the support body 3 is installed in the main body 4 accommodating portion 4.4 in a state, its first to fourth limit block surfaces 3.2.1, 3.2.2, 3.2. 3. 3.2.4 and the first to fourth limit groove surfaces 4.2.1, 4.2.2, 4.2.3, and 4.2.4 of the main body 4 arbitrarily match each other to adjust the cutter head 7 in the first to fourth Quick positioning when any one of the stressed surfaces is pressed tightly. Among them, the first to fourth limit block surfaces 3.2.1, 3.2.2, 3.2.3, and 3.2.4 are respectively the first to fourth bearing surfaces 3.1.1, 3.1.2, 3.1.3, and 3.1. 4 on the same plane. The limit block surface and the limit groove surface are aligned in the direction of the center axis L, that is, when any force-bearing surface is pressed by the pressing surface of the fastening device 5, any limit block surface is also just one limit. The groove surface is restricted by matching. This effect is that when one side of the cutter head is worn out in the actual work process, when the rotating position of the cutter head 7 needs to be adjusted, it can be quickly positioned to the side of the unworn cutter head, and , Due to the mutual fit of the limit block surface and the limit groove surface, an interlocking form is formed, which further limits the tendency of the cutter head 7 to loosen or fall off during operation. Each limit block surface of the cutter head 7 has been changed once to make it wear evenly. When the wear-resistant material of the cutter head is fully utilized, the cost is saved, and the use of the tool tip, head, support body and main body Matching and coordinating lifespan allows them to reach their wear limit almost simultaneously with the best design. Thus, the economic benefits attached to the present invention are achieved. When each limit block surface has been changed once, then the cutter head 7 is used to its best. At this time, a new cutter head 7 can be replaced. In the same way, the new cutter head 7 can also be changed four times. A limit block surface makes it wear evenly.

The above embodiment only discloses the case where the supporting body 3 has four force-receiving surfaces, through the first to fourth limit block surfaces 3.2.1, 3.2.2, 3.2.3, 3.2.4 and the main body on the supporting body 3. The first to fourth limit groove surfaces 4.2.1, 4.2.2, 4.2.3, and 4.2.4 of 4 can be matched with each other arbitrarily, and can be adjusted by 90° or 180° each time, which can make the cutter head 7 wear evenly around.

In the same way, this case can also include the case where the support body 3 has two force-bearing surfaces. The two limit block surfaces on the support body 3 and the two limit groove surfaces of the main body 4 arbitrarily match each other, so that the 180 can be adjusted. °Or replace with a new cutter head 7. This case can also realize the situation that the supporting body 3 has three or five and more than five stress surfaces, through the three or five and five of the supporting body 3, the upper limit block surface and the main body 4 are three or Five and five are arbitrarily matched with each other with the upper limit groove surface, so that various angle transformations can be adjusted or new cutter head 7 can be replaced.

In addition, except for the case where one fastening device 5 is included in the above embodiment, the number of fastening devices 5 is at least one, that is to say, it can be one or more, and the pressing surface 5.1 of the fastening device 5 is attached to the support One or one of the multiple force-receiving surfaces of the body 3 can be realized, and the cutter head 7 is arranged in the receiving portion 4.4 of the main body 4 in a transformable manner. By loosening the fastening device 5, the cutter head 7 can be changed. There are two ways to change the position. The first method is to change the working direction in the receiving part 4.4 of the main body 4 by the cutter head 7, and the second One way is to change the cutter head 7 into a new cutter head 7. These two transformation methods can be selected according to actual conditions, so that the cutter head 7 reaches their wear limit, thereby achieving the effect of zero waste.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. For those familiar with the field, it can be easily Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the legends shown and described here.

Claims

A tool holder for a ground processing machine, especially a road milling machine, characterized in that the tool holder has a main body (4), a fastening device (5), a cutter head (7), and the main body (4) has a receiving part ( 4.4), the cutter head (7) is arranged in the receiving part (4.4) of the main body (4) in a transformable manner by the fastening device (5).
The tool holder according to claim 1, wherein the tool head (7) comprises a tool tip (1), a head (2), a support body (3); the support body of the tool head (7) (3) There is a holding rod portion (30), the holding rod portion (30) has a second central axis (L1), and the cutter head (7) is arranged on the holding rod portion (30) of the support body (3) Inside the receiving part (4.4) of the main body (4).
The tool holder according to claim 2, wherein the receiving portion (4.4) of the main body (4) has a first central axis (L), and the first central axis (L) of the receiving portion (4.4) It coincides with the second central axis (L1) of the holding rod portion (30).
The tool holder according to claim 3, wherein the receiving portion (4.4) of the main body (4) has a concave fixing surface (4.5), and the element line of the fixing surface (4.5) and the first center The axis (L) forms an included angle (α), and the angle range of the included angle (α) is between 3° and 10°.
The tool holder according to claim 4, wherein the holding rod portion (30) has a holding surface (3.4), and the element line of the holding surface (3.4) forms an angle with the second central axis (L1) (β), the angle range of the included angle (β) is between 3°-10°.
The tool holder according to claim 5, characterized in that the included angle (α) = the included angle (β), so that the fixing surface (4.5) and the holding surface (3.4) form a conical matching relationship.
The tool holder according to claim 2, characterized in that at least two bearing surfaces are arranged on the holding rod portion (30) of the supporting body (3) around the central axis (L1), each of which is The surfaces are respectively arranged at an included angle (γ) with the central axis (L1) of the support body (3); the angle range of the included angle (γ) is between 10°-20°.
The tool holder according to claim 7, wherein the holding rod portion (30) of the supporting body (3) is assembled into the receiving portion (4.4) of the main body (4) along the (V) direction, and then tightly The fixing device (5) uses its external thread (5.2) to be screwed into the threaded hole (4.1) of the main body (4) along the (V1) direction, and is attached to the support through the pressing surface (5.1) of the fastening device (5) At least one of the at least two stress surfaces of the body (3).
The tool holder according to claim 8, characterized in that the supporting body (3) has at least two limit block surfaces which are respectively on the same plane as the at least two force-bearing surfaces; the supporting body (3) ) In the state of being installed in the receiving portion (4.4), at least two limit block surfaces and at least two limit groove surfaces on the main body (4) are arbitrarily matched with each other, so as to adjust the position of the cutter head (7) Rapid positioning when at least one of the at least two stress-bearing surfaces is pressed and fitted together.
The tool holder according to claim 2, wherein the tip (1) of the tool head (7) is at least partially composed of cemented carbide material, and the head (2) is composed of cemented carbide material, supporting The body (3) is made of alloy material. The hardness of the tip (1), the head (2), and the support body (3) gradually increase against the direction (V) and are hard-connected together by welding to form a whole status.