Broach embedded with hard alloy

Abstract

The utility model provides a broach embedded with hard alloy, and relates to the technical field of broaches. The broach embedded with the hard alloy comprises a broach rod, a blade part is integrally formed on the broach rod, a mounting rod is arranged at the tail end of the broach rod, and an alloy broach block and a pressing piece are arranged on the mounting rod; the alloy cutter block is arranged on the mounting rod in a sleeving manner, an external thread is constructed on the mounting rod, an internal thread which can be in threaded connection with the external thread is arranged on the pressing piece, and the pressing piece can rotate in the direction close to the cutter rod so as to press the alloy cutter block on a step surface between the mounting rod and the cutter rod; the alloy cutter block is provided with a cutting edge matched with a forming hole in a workpiece in shape. According to the broach embedded with the hard alloy, the service life of the broach can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of broaches, and particularly to a broach with inlaid cemented carbide. Background Art

[0002] A broach is a multi-tooth tool. During broaching, since the latter tooth is higher than the former tooth, metal can be cut off layer by layer from the workpiece to obtain the required surface of the workpiece. The broaching process is widely used in the machining of holes.

[0003] In the current broach, the cutting edge is usually integrally formed on the tool shank. After the cutting edge is worn to a certain extent, the broach will be scrapped as a whole. The price of the broach is usually relatively high, resulting in a high processing cost of the workpiece. Summary of the Utility Model

[0004] Therefore, the utility model provides a broach with inlaid cemented carbide to at least partially solve the technical problem of the short service life of the existing broach.

[0005] The technical solution of the utility model is as follows:

[0006] A broach with inlaid cemented carbide includes a tool shank. A cutting edge is integrally formed on the tool shank. An installation rod is provided at the tail end of the tool shank. An alloy cutter block and a pressing member are provided on the installation rod. The alloy cutter block is sleeved on the installation rod. External threads are formed on the installation rod. An internal threaded hole is provided on the pressing member. The internal threaded hole can be screwed with the external threads, and the alloy cutter block is pressed by the pressing member on the step surface between the installation rod and the tool shank. The alloy cutter block is provided with a cutting edge matching the shape of the hole to be machined on the workpiece.

[0007] Further, an insertion hole is opened on the end surface at the tail end of the tool shank, and the installation rod is inserted into the insertion hole with interference fit.

[0008] Further, a first pressing block and a second pressing block are sleeved on the installation rod. The first pressing block is located between the alloy cutter block and the step surface, and the second pressing block is located between the pressing member and the alloy cutter block.

[0009] Further, the installation rod includes a large-diameter section and a small-diameter section connected in series. The first pressing block, the alloy cutter block, and the second pressing block are all sleeved on the large-diameter section, and the external threads are formed on the small-diameter section.

[0010] Further, two opposite first planes are formed on the outer peripheral surface of the large-diameter section. The wall surface of the inner hole of the alloy cutter block is attached to the outer peripheral surface of the large-diameter section.

[0011] Further, the material of the alloy cutter block is YG8.

[0012] Further, the alloy cutter block is conical, and the outer diameter of the end face of the alloy cutter block close to one end of the cutter bar is greater than the outer diameter of the end face of the other end of the alloy cutter block.

[0013] Further, a through hole penetrating the pressing member is provided on the bottom surface of the internal thread hole, and a central hole is formed on one end of the mounting rod away from the cutter bar.

[0014] Further, a rear support handle matching the cutter bar is formed at the end of the pressing member.

[0015] Further, at least two opposite second planes are formed on the outer periphery of the pressing member.

[0016] The working principle and beneficial effects of the present utility model are as follows:

[0017] The broach with inlaid cemented carbide provided by the present utility model is provided with a detachable and replaceable alloy cutter block at the tail end of the cutter bar. The alloy cutter block is used to complete the forming cutting of the hole to be machined on the workpiece. By replacing the alloy cutter block, while ensuring the forming of the hole to be machined on the workpiece, the cutting edge on the broach can be fully utilized to extend the service life of the broach and reduce the processing cost of the workpiece. Description of the Drawings

[0018] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments.

[0019] Figure 1 is an exploded view of the broach with inlaid cemented carbide provided by the embodiment of the present utility model;

[0020] Figure 2 is Figure 1 a partial enlarged view of part A in

[0021] In the figure: 100, cutter bar, 110, cutting edge; 101, insertion hole; 200, mounting rod; 210, external thread, 220, large diameter section; 221, first plane; 201, central hole; 300, alloy cutter block; 310, first pressing block; 320, second pressing block; 400, pressing member; 401, through hole; 410, second plane. Specific Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0023] This embodiment provides a broach with inlaid cemented carbide. Refer to Figure 1 As shown, it includes a tool shank 100, and a cutting edge 110 is integrally formed on the tool shank 100. An installation rod 200 is provided at the tail end of the tool shank 100, and a cemented carbide tool block 300 and a pressing member 400 are provided on the installation rod 200; the cemented carbide tool block 300 is sleeved on the installation rod 200, an external thread 210 is formed on the installation rod 200, and an internal thread hole is provided on the pressing member 400. The internal thread hole can be screwed with the external thread 210 so that the cemented carbide tool block 300 is pressed against the step surface between the installation rod 200 and the tool shank 100 by the pressing member 400; a cutting edge matching the shape of the formed hole on the workpiece is provided on the cemented carbide tool block 300.

[0024] Generally speaking, for the broach with inlaid cemented carbide in this embodiment, after the original cutting edge on the broach is worn, a replaceable cemented carbide tool block 300 can be installed at the end of the broach, so that the worn cutting edge can perform preliminary cutting on the hole to be machined on the workpiece, and the cutting edge of the cemented carbide tool block 300 can cut and form the hole to be machined on the workpiece. By setting the cemented carbide tool block 300, the original cutting edge on the broach can be fully utilized, the service life of the broach can be extended, and the processing cost of the workpiece can be reduced. Among them, the structure of the end of the tool shank 100 and the cutting edge integrally formed on the tool shank 100 can refer to the existing broach, and its structure will not be described in detail here.

[0025] Refer to Figure 1 As shown, in this embodiment, an insertion hole 101 is opened at the tail end of the tool shank 100, and the aforementioned installation rod 200 is press-fitted into the insertion hole 101 to realize the fixation of the installation rod 200 on the tool shank 100. In some embodiments, the installation rod 200 and the tool shank 100 can also be connected by threads; in some embodiments, the installation rod 200 can also be welded and fixed on the tool shank 100. By setting the installation rod 200, it is convenient to install and replace the cemented carbide tool block 300 on the tool shank 100.

[0026] Refer to Figure 1 As shown, in this embodiment, a first pressing block 310 and a second pressing block 320 are also sleeved on the installation rod 200. Among them, the first pressing block 310 is located between the cemented carbide tool block 300 and the step surface, and the second pressing block 320 is located between the pressing member 400 and the cemented carbide tool block 300. In this embodiment, by setting the above-mentioned first pressing block 310 and second pressing block 320, the installation position of the cemented carbide tool block 300 can be conveniently adjusted by adjusting the thicknesses of the first pressing block 310 and the second pressing block 320.

[0027] Refer to Figure 1As shown, the mounting rod 200 of this embodiment includes a large-diameter section 220 and a small-diameter section connected in series. Among them, the first pressing block 310, the alloy tool block 300, and the second pressing block 320 are all sleeved on the large-diameter section 220, and the aforementioned external thread 210 is formed on the small-diameter section. In this embodiment, by setting the mounting rod 200 to be formed by connecting the large-diameter section 220 and the small-diameter section in series, it is convenient for the first pressing block 310, the alloy tool block 300, and the second pressing block 320 to pass through the small-diameter section and be sleeved on the large-diameter section 220.

[0028] In this embodiment, referring to Figure 1 As shown, on the outer peripheral surface of the large-diameter section 220, two opposite first planes 221 are formed, and the wall surface of the inner hole of the alloy tool block 300 is attached to the outer peripheral surface of the large-diameter section 220. In this embodiment, by setting the above two first planes 221 and providing planes on the inner hole of the alloy tool block 300 that are attached to the two first planes 221, the rotation of the alloy tool block 300 can be restricted.

[0029] The material of the alloy tool block 300 of this embodiment is YG8. In some embodiments, the material of the alloy tool block 300 can also be other cemented carbides.

[0030] In this embodiment, the alloy tool block 300 is conical, and the diameter of the end face of the alloy tool block 300 near the tool shank 100 is larger than the diameter of the other end face of the alloy tool block 300. In this embodiment, the side wall of the end face of the alloy tool block 300 near the tool shank 100 constitutes the cutting edge of the alloy tool block 300. By setting the alloy tool block 300 to be conical, it is beneficial for cutting the hole to be machined on the workpiece.

[0031] Referring to Figure 1 As shown, in this embodiment, a through hole 401 penetrating the pressing member 400 is provided on the bottom surface of the aforementioned internal thread hole, and a center hole 201 is formed on the end of the mounting rod 200 away from the tool shank 100.

[0032] In this embodiment, by setting the above through hole 401 and center hole 201, it is convenient to replace the alloy tool block 300. Specifically, since the broach is usually heavy, in order to facilitate rotating the pressing member 400 to replace the alloy tool block 300, the tool shank 100 needs to be fixed. In this embodiment, by setting the above through hole 401 and center hole 201, the end of the tool shank 100 can be clamped by a fixing device such as the chuck of an ordinary lathe, and the center hole 201 of the mounting rod 200 can be tightened by a center, so as to fix the tool shank 100.

[0033] Referring to Figure 1As shown, a rear support handle matching the tool bar 100 is constructed at the end of the pressing member 400. In this embodiment, by arranging the rear support handle on the pressing member 400, after connecting the pressing member 400 with the tool bar 100, the functions of the whole scraper can be complete. No additional components are required, thus the structure of the broach can be simplified.

[0034] Reference Figure 1 As shown, at least two opposite second planes 410 are constructed on the outer periphery of the pressing member 400. In this embodiment, by arranging the two second planes 410, it is convenient to clamp the two second planes 410 with a tool to rotate the pressing member 400, so as to conveniently replace the above-mentioned alloy tool block 300.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A broach inlaid with cemented carbide, comprising a tool bar (100), wherein a blade portion (110) is integrally formed on the tool bar (100), characterized in that: The rear end of the tool rod (100) is provided with a mounting rod (200), and the mounting rod (200) is provided with an alloy blade block (300) and a clamping piece (400). The alloy blade block (300) is sleeved on the mounting rod (200), and the mounting rod (200) is provided with an external thread (210). The clamping piece (400) is provided with an internal thread hole, and the internal thread hole can be screwed with the external thread (210). The clamping piece (400) presses the alloy blade block (300) onto the step surface between the mounting rod (200) and the tool rod (100), and the alloy blade block (300) is provided with a cutting edge that matches the shape of the hole to be processed on the workpiece.

2. The carbide-embedded broach according to claim 1, characterized in that: An insertion hole (101) is provided on the end surface of the rear end of the knife rod (100), and the mounting rod (200) is inserted into the insertion hole (101) with interference fit.

3. The carbide-embedded broach according to claim 1, characterized in that: A first pressing block (310) and a second pressing block (320) are sleeved on the mounting rod (200); the first pressing block (310) is located between the alloy blade block (300) and the step surface; and the second pressing block (320) is located between the clamping member (400) and the alloy blade block (300).

4. The carbide-embedded broach according to claim 3, characterized in that: The mounting rod (200) comprises a large diameter section (220) and a small diameter section connected in series; the first pressing block (310), the alloy blade block (300) and the second pressing block (320) are all sleeved on the large diameter section (220), and the external thread (210) is constructed on the small diameter section.

5. The carbide-embedded broach according to claim 4, characterized in that: Two opposite first planes (221) are constructed on the outer peripheral surface of the large-diameter section (220); and the wall surface of the inner hole of the alloy blade block (300) fits the outer peripheral surface of the large-diameter section (220).

6. The carbide-embedded broach according to claim 1, characterized in that: The alloy blade block (300) is made of YG8.

7. The carbide-embedded broach according to claim 1, characterized in that: The alloy blade block (300) is conical, and the outer diameter of an end surface of the alloy blade block (300) close to one end of the blade rod (100) is greater than the outer diameter of an end surface of the other end of the alloy blade block (300).

8. The carbide-embedded broach according to claim 1, characterized in that: A through hole (401) penetrating the clamping member (400) is provided on the bottom surface of the internal threaded hole, and a center hole (201) is formed on one end of the mounting rod (200) away from the knife rod (100).

9. The carbide-embedded broach according to any one of claims 1 to 8, characterized in that: The end of the pressing piece (400) is configured with a rear support handle matching the knife rod (100).

10. The carbide-embedded broach according to claim 9, characterized in that: At least two opposite second planes (410) are formed on the outer circumference of the pressing piece (400).

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