A double-head positioning tool holder

Abstract

The present invention discloses a double-cutter head positioning tool holder, which belongs to the field of casting processing, and comprises a tool holder body and a second tool head frame, wherein the front end of the tool holder body is provided with a first tool head, the front end of the second tool head frame is provided with a second tool head, the outer ring of the second tool head frame is provided with a spline, the tool holder body is hollow inside, and its inner wall is provided with a groove, the spline and the groove can cooperate, and a stop mechanism is provided in the tool holder body, and the stop mechanism is configured to limit the displacement of the second tool head frame at the tool holder body. This scheme provides a double-cutter head positioning tool holder, which adopts the design of front and rear first cutter heads and second cutter heads, and can simultaneously mill two annular grooves inside a tubular casting, greatly improving work efficiency, and at the same time, through the cooperation of the spline and the groove, the second cutter head frame is displaced inside the tool holder body, but cannot rotate, so that the distance between the first cutter head and the second cutter can be adjusted, greatly improving the scope of application.

Description

Technical Field

[0001] The invention relates to the field of casting processing, and in particular to a double-cutter head positioning type tool holder. Background Art

[0002] Using a milling machine and a rotating cutter head to groove the inside of a tubular casting is a commonly used metal processing method. It is particularly suitable for processing annular grooves inside tubular castings. These annular grooves can be used to place limiters, seals or lubricants, etc., and are also one of the important processes in the processing of tubular castings.

[0003] In practical applications, such as when annular grooving is performed on the inner wall of a vehicle steering gear housing, it is usually necessary to continuously open multiple annular grooves. These grooves are usually placed with multiple seals to prevent the lubricating oil inside the steering gear from leaking out and to prevent external dust from entering the steering gear. In the existing processing process, a single tool head tool holder is required to perform separate processing, which results in low processing efficiency and inaccurate control of the spacing between grooves.

[0004] The inventor has conducted research on this issue and has specially developed a double-tool head positioning tool holder to solve the technical problems of low processing efficiency and inaccurate spacing control in the prior art. Summary of the invention

[0005] The object of the present invention is to provide a double-tool head positioning tool holder to solve the technical problems of low processing efficiency and inaccurate spacing control in the prior art.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A double-cutting-head positioning tool holder comprises a tool holder body and a second tool holder rack, wherein a first cutter head is provided at the front end of the tool holder body, a second cutter head is provided at the front end of the second tool holder rack, a spline is provided at the outer ring of the second tool holder rack, the tool holder body is hollow inside, a groove is provided on its inner wall, the spline and the groove can cooperate, a stop mechanism is provided in the tool holder body, and the stop mechanism is configured to limit the displacement of the second tool holder rack at the tool holder body.

[0008] Furthermore, the stop mechanism includes a front pull rod, a stop block, a rear pull rod and a stop block, the front pull rod, the stop block and the rear pull rod are fixedly connected in a center-aligned manner, the inner wall of the tool holder body is provided with an internal thread, the outer wall of the stop block is provided with an external thread, and the internal thread and the external thread can cooperate. When the distance between the tool holder body and the second tool head frame is adjusted, the stop mechanism locks the two to prevent them from displacement.

[0009] Furthermore, the second cutter head frame is hollow inside, and the front pull rod can pass through the second cutter head frame, and the other end of the front pull rod is provided with a thread and a nut, and the front pull rod and its nut are configured to make the second cutter head frame close to one side of the stop block. The second cutter head frame is locked with the stop mechanism.

[0010] Furthermore, a hexagon socket is provided on one side of the stop block, and the hexagon socket is configured to rotate the stop block by external force. The stop block can be rotated through the hexagon socket, so that the stop block rotates with the cooperation of the thread and the tool holder body is displaced to adjust the distance between the first tool head and the second tool head.

[0011] Furthermore, the outer wall of the stop block is provided with a spline, and the spline can cooperate with the groove on the inner wall of the tool holder body, and the middle part of the stop block is provided with a through hole, and the rear pull rod can pass through the through hole of the stop block, and the rear pull rod is provided with a thread and a nut, and the rear pull rod and its nut are configured to make the stop block close to one side of the stop block. The spline on the outer wall of the stop block can prevent the stop block from sliding, so that the positioning between the first tool head and the second tool head is more accurate.

[0012] Furthermore, a hexagonal protrusion is provided on one side of the stop block, and the hexagonal protrusion can cooperate with the inner hexagon of the stop block. The stop block is locked by the hexagonal protrusion to prevent the stop block from sliding, so that the positioning between the first cutter head and the second cutter head is more accurate.

[0013] Furthermore, the first cutter head is provided with an arc-shaped cutting cavity, which can improve the material discharge efficiency and prevent the cut materials from accumulating at the cutter head.

[0014] Furthermore, the second cutter head is provided with an arc-shaped cutting cavity, which can improve the material discharge efficiency and prevent the cut materials from accumulating at the cutter head.

[0015] Compared with the existing technology, this solution has the following advantages:

[0016] The present invention provides a double-cutter head positioning tool holder, which adopts the design of the front and rear first and second tool heads, and can simultaneously mill two annular grooves inside the tubular casting, greatly improving the working efficiency. At the same time, through the cooperation of the spline and the groove, the second tool head holder is displaced inside the tool holder body, but cannot rotate, so that the distance between the first tool head and the second tool head can be adjusted, greatly improving the application range.

[0017] A stop mechanism is used to limit the second cutter head frame adjusted to a suitable position inside the cutter seat body and stabilize its position, thereby greatly improving the processing accuracy and making the distance between the two slots more accurately controllable;

[0018] This scheme has a simple structure, is easy to set up, and has good promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment.

[0020] Figure 2 It is a schematic structural diagram of the second tool head holder of the preferred embodiment.

[0021] Figure 3 It is a schematic diagram of the structural decomposition of a preferred embodiment.

[0022] Figure 4 Schematic diagram of the structural decomposition of the stop mechanism.

[0023] Figure 5 A schematic diagram of the other side of the structural decomposition of the stop mechanism. DETAILED DESCRIPTION

[0024] The original intention of the present invention is to provide a technical solution for performing two parallel grooving operations inside a tubular casting. As a supplier of automotive parts, the applicant provides processing and manufacturing services for automotive steering gear housings. During the processing, the applicant continuously conducts research to make the two parallel grooving operations inside the tubular castings efficient and accurate. Moreover, a set of equipment can be used to perform grooving operations for steering gear housings of various specifications. Therefore, the present invention has a strong promotion significance.

[0025] refer to Figure 1 Figure 2 Figure 3 A double-blade positioning tool holder includes a tool holder body 1 and a second tool holder frame 2. A first tool head 11 is provided at the front end of the tool holder body 1. The first tool head 11 is composed of four tool heads arranged in a circular array. An arc-shaped cutting cavity is provided between the four tool heads, which can improve the discharge efficiency and prevent the cut material from accumulating at the tool head.

[0026] A second cutter head 21 is provided at the front end of the second cutter head holder 2. The second cutter head 21 consists of four cutter heads arranged in a circular array. An arc-shaped cutting cavity is provided between the four cutter heads to improve the material discharge efficiency and prevent the cut materials from accumulating at the cutter heads. Four splines 22 are provided on the outer ring of the second cutter head holder 2. The interior of the cutter seat body 1 is hollow, and four grooves 12 are provided on its inner wall. The splines 22 and the grooves 13 can cooperate, that is, the second cutter head holder 2 can be horizontally displaced at the cutter seat body 1, but the two cannot rotate.

[0027] refer to Figure 4 Figure 5A stop mechanism is provided in the tool holder body 1, and the stop mechanism is configured to limit the displacement of the second tool head holder 2 at the tool holder body 1. The stop mechanism includes a front pull rod 31, a stop block 32, a rear pull rod 33 and a stop block 34. The front pull rod 31, the stop block 32 and the rear pull rod 33 form a center-aligned fixed integrated structure. The inner wall of the tool holder body 1 is provided with an internal thread 13, and the outer wall of the stop block 32 is provided with an external thread 322. The internal thread 13 and the external thread 322 can cooperate. The outer side of the stop block 32 is provided with an internal hexagon 321. By rotating the internal hexagon 321, the stop block 32 can be driven to rotate relative to the tool holder body 1, so that the stop block can rotate under the cooperation of the thread and displace the tool holder body 1.

[0028] There is an empty groove 23 in the central part of the second tool head frame 2, and the front pull rod 31 can pass through the inside of the second tool head frame 2. The other end of the front pull rod 31 is provided with a thread and a nut 311. The front pull rod 31 and the nut 311 can make the second tool head frame 2 close to the stop block 32.

[0029] The outer wall of the stop block 34 is provided with four splines 341, and the splines 341 can cooperate with the groove 12 on the inner wall of the tool holder body 1. A through hole is provided in the middle of the stop block 34, and the rear pull rod 33 can pass through the through hole of the stop block 34. The rear pull rod 33 is provided with a thread and a nut 331. The rear pull rod 33 and the nut 331 can make the stop block 34 close to one side of the stop block 32.

[0030] A hexagonal protrusion 342 is provided on one side of the stop block 34, and the hexagonal protrusion 342 can cooperate with the hexagonal socket 321 of the stop block 32. When the rear pull rod 33 and the nut 331 can press the stop block 34 tightly against one side of the stop block 32, the stop block 32 is locked by the hexagonal protrusion 342, which can prevent the stop block 32 from sliding, making the positioning between the first cutting head 11 and the second cutting head 21 more accurate.

[0031] In the specific application of the double-cutter positioning tool holder of the present scheme, the distance between the first tool head 11 and the second tool head 21 is first set according to the processing requirements, the second tool head frame 2 is placed into the tool holder body 1 from the front end, and then the stop block 32 is rotated by a wrench tool that can cooperate with the hexagon socket 321 of the stop block 32 until the front end of the stop block 32 is in contact with the rear end of the second tool head frame 2, and then the distance between the first tool head 11 and the second tool head 21 is confirmed, and the nut 311 is tightened to close the front end of the stop block 32. Under the action of the pull rod 31, the second cutter head frame 2 is closely attached to the stop block 32, and then the stop block 34 is pushed into the rear end of the cutter seat body 1. At this time, the spline 341 of the stop block 34 cooperates with the groove 12 on the inner wall of the cutter seat body 1 until the hexagonal protrusion 342 on one side of the stop block 34 cooperates with the hexagonal inner corner 321 of the stop block 32. By tightening the nut 331, under the action of the rear pull rod 33, the stop block 34 is closely attached to the stop block 32, and the locking function of the stop mechanism on the second cutter head frame 2 is realized.

[0032] The milling machine clamps the rear end of the tool holder body 1 through a fixture, and under the action of the milling machine, two parallel grooves can be started inside the tubular casting. When necessary, by adjusting and locking the distance between the first tool head 11 and the second tool head 21, two grooves with different distances can be opened inside the tubular casting with different design requirements, which greatly facilitates the operating requirements, greatly reduces the production cost, and improves the process accuracy.

[0033] This scheme has a simple structure, is easy to set up, and has good promotion significance.

Claims

1. A double-blade positioning tool holder, characterized in that: The present invention comprises a tool holder body and a second tool head frame, wherein the front end of the tool holder body is provided with a first tool head, the front end of the second tool head frame is provided with a second tool head, the outer cutting surfaces of the first tool head and the second tool head are flush, the outer ring of the second tool head frame is provided with a spline, the tool holder body is hollow inside, and a groove is provided on its inner wall, the spline and the groove can be matched, and a stop mechanism is provided in the tool holder body, and the stop mechanism is configured to limit the displacement of the second tool head frame at the tool holder body; The stop mechanism comprises a front pull rod, a stop block, a rear pull rod and a stop block, the front pull rod, the stop block and the rear pull rod are centrally aligned and fixedly connected as a whole, the inner wall of the tool holder body is provided with an internal thread, the outer wall of the stop block is provided with an external thread, and the internal thread and the external thread can cooperate; The second cutter head frame is hollow inside, and the front pull rod can pass through the inside of the second cutter head frame. The other end of the front pull rod is provided with a thread and a nut. The front pull rod and the nut are configured to make the second cutter head frame close to one side of the stop block. The outer wall of the stop block is provided with a spline, and the spline can cooperate with the groove on the inner wall of the knife seat body. A through hole is provided in the middle of the stop block, and the rear pull rod can pass through the through hole of the stop block. The rear pull rod is provided with a thread and a nut. The rear pull rod and its nut are configured to keep the stop block tightly against one side of the stop block.

2. The double-blade positioning tool holder according to claim 1, characterized in that: The first blade head is provided with an arc-shaped cutting cavity.

3. A double-blade positioning tool holder according to claim 1 or 2, characterized in that: The second blade head is provided with an arc-shaped cutting cavity.

Images