High speed steel broach

Abstract

The utility model discloses a high speed steel broaching tool, including tool mechanism and tooth changing mechanism, the tool mechanism includes broach and a plurality of teeth, a plurality of teeth all are inserted with broach, tooth changing mechanism, the tooth changing mechanism includes a plurality of ferrules of detachable sleeve connection in the outside of broach, a plurality of positioning pins of swing joint between the broach and ferrule. In the utility model, when the local tooth appears abrasion, prepare new tooth, then, pull out the positioning pin on the ferrule outside the abrasion tooth, then, straighten the ferrule and operate the mechanical transmission rod to move downward, and the ferrule can pull out the abrasion tooth, after taking down the stop rod on the abrasion tooth, can carry out the dismounting and replacement operation of new and old teeth, then, loosen the action force to the ferrule, and the ferrule will restore to the original state and reengage with the broach, finally, reinsert the positioning pin, complete the replacement of local tooth, thereby effectively reduce the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of broaching tool technology, specifically a high-speed steel broaching tool. Background Technology

[0002] A broach is a forming tool used for broaching. Its surface has multiple rows of teeth, the size and shape of which increase and change from the entry point to the exit point. When the broach performs a broaching motion, each tooth cuts a certain thickness of metal from the workpiece, ultimately obtaining the required size and shape. Broaches are commonly used in batch and mass production to machine round holes, spline holes, keyways, planes, and shaped surfaces, offering high productivity.

[0003] For traditional solid broaches, when localized wear occurs (especially on critical finishing teeth), the entire tool must be regrinded due to its indivisible structure. This 'one problem affects the whole' maintenance method, significantly increasing operating costs. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A high-speed steel broaching tool includes a tool mechanism and a tooth changing mechanism. The tool mechanism includes a broach and multiple cutting teeth, all of which are inserted into the broach. The tooth changing mechanism includes multiple sleeves detachably sleeved on the outside of the broach, multiple positioning pins movably connected between the broach and the sleeves, and two stop rods vertically penetrating the cutting teeth. Both stop rods are fitted between the broach and the sleeves, and the inner end of the cutting teeth penetrates through the sleeves.

[0007] By adopting the above technical solution, when a local cutting tooth wears out, a new cutting tooth is prepared; then, the locating pin on the outer sleeve of the worn cutting tooth is pulled out; next, the sleeve is straightened and the mechanical transmission rod is operated to move downwards, and the sleeve can pull out the worn cutting tooth; after removing the stop bar on the worn cutting tooth, the old and new cutting teeth can be replaced; then, the force on the sleeve is released, and the sleeve will return to its original state and re-engage with the broach; finally, the locating pin is reinserted to complete the replacement of the local cutting tooth, thereby effectively reducing maintenance costs.

[0008] In a preferred embodiment, this utility model can be further configured as follows: multiple blades are equally spaced and arranged in a ring to form multiple circles, and the multiple circles of blades are equally spaced and arranged in a row.

[0009] In a preferred embodiment, the present invention can be further configured such that: the cutting tooth is composed of a tooth block and an insert, the length of the insert is greater than the length of the tooth block, the insert is inserted into the puller, and the cross-section of the cutting tooth is T-shaped.

[0010] In a preferred embodiment, the present invention can be further configured such that both ends of the sleeve are bent inward, and the sleeve is made of an elastic metal material.

[0011] In a preferred embodiment, the present invention can be further configured such that a plurality of locating pins are arranged in a matrix, the locating pins being made of metal material.

[0012] In a preferred embodiment, the present invention can be further configured such that: a retaining plate is attached to both the top and bottom of the blade teeth, the retaining plate has protrusions on both sides, and the retaining plate is engaged with the sleeve.

[0013] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0014] 1. In this utility model, when a local cutting tooth wears out, a new cutting tooth is prepared; then, the locating pin on the outer sleeve of the worn cutting tooth is pulled out; next, the sleeve is straightened and the mechanical transmission rod is operated to move downward, so that the sleeve can pull out the worn cutting tooth; after removing the stop bar on the worn cutting tooth, the old and new cutting teeth can be replaced; then, the force on the sleeve is released, and the sleeve will return to its original state and re-engage with the puller; finally, the locating pin is reinserted to complete the replacement of the local cutting tooth, thereby effectively reducing maintenance costs.

[0015] 2. In this utility model, the clamping plate and the protrusion cooperate to reinforce the clamping sleeve, and also stabilize the cutting teeth, reducing the probability of the cutting teeth falling off during use, so that the broach can stably process gears under tens of tons of pulling force. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the cutting tool mechanism of this utility model;

[0018] Figure 3 This is a perspective view of the cutting teeth of this utility model;

[0019] Figure 4 This is a schematic diagram of the gear-changing mechanism of this utility model;

[0020] Figure 5 This utility model Figure 4 Enlarged view of the A-section structure;

[0021] Figure 6 This is a perspective view of the card plate of this utility model.

[0022] Figure label:

[0023] 100. Cutting tool mechanism; 110. Broach; 120. Cutting tooth; 121. Tooth block; 122. Insert bar;

[0024] 200. Gear changing mechanism; 210. Sleeve; 220. Locating pin; 230. Stop bar;

[0025] 300, pallet;

[0026] 400. Protrusion. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of a high-speed steel broaching tool provided by this utility model.

[0030] Example 1:

[0031] Combination Figure 1-6 As shown, the present invention provides a high-speed steel broaching tool, including a tool mechanism 100 and a tooth changing mechanism 200. The tool mechanism 100 includes a broach 110 and a plurality of cutting teeth 120, all of which are inserted into the broach 110.

[0032] The tooth changing mechanism 200 includes multiple sleeves 210 detachably sleeved on the outside of the pull cutter 110, multiple positioning pins 220 movably connected between the pull cutter 110 and the sleeves 210, and two stop rods 230 vertically penetrating the cutter teeth 120. The two stop rods 230 are both in contact with the pull cutter 110 and the sleeves 210, and the inner end of the cutter teeth 120 penetrates the sleeves 210.

[0033] Furthermore, multiple cutting teeth 120 are evenly spaced and arranged in a ring to form multiple circles, and the multiple circles of cutting teeth 120 are evenly spaced and arranged in a row. The layout design of the cutting teeth 120 ensures that the gear to be processed can be formed smoothly.

[0034] Furthermore, the cutting tooth 120 is composed of a tooth block 121 and an insert 122. The length of the insert 122 is greater than the length of the tooth block 121. The insert 122 is inserted into the puller 110. The cross-section of the cutting tooth 120 is T-shaped. The structural design of the cutting tooth 120 provides conditions for inserting and removing the cutting tooth 120.

[0035] Furthermore, the two ends of the sleeve 210 are bent inward. The sleeve 210 is made of elastic metal material. The shape design of the sleeve 210 can be firmly clamped to the outside of the puller 110. Then, the elastic metal material is used to give the sleeve 210 the property of restoring its shape, so that it fits tightly with the puller 110.

[0036] Example 2:

[0037] Combination Figure 1-2 As shown, based on Embodiment 1, multiple positioning pins 220 are arranged in a matrix. The positioning pins 220 are made of metal material. The layout design of the positioning pins 220 can improve the connection between the sleeve 210 and the puller 110.

[0038] Example 3:

[0039] Combination Figure 4-6 As shown in the above embodiment, the top and bottom of the blade tooth 120 are both fitted with a retaining plate 300, and both sides of the retaining plate 300 are provided with protrusions 400. The retaining plate 300 is engaged with the sleeve 210. The retaining plate 300 and the protrusions 400 cooperate to reinforce the sleeve 210 and stabilize the blade tooth 120, reducing the probability of the blade tooth 120 falling off during use.

[0040] The working principle and usage process of this utility model are as follows: When the local cutting tooth 120 is worn, prepare a new cutting tooth 120; then, pull out the positioning pin 220 on the outer sleeve 210 of the worn cutting tooth 120; next, straighten the sleeve 210 and operate the mechanical transmission rod to move downward, so that the sleeve 210 can pull out the worn cutting tooth 120; after removing the stop bar 230 on the worn cutting tooth 120, the old and new cutting teeth 120 can be replaced; then, release the force on the sleeve 210, the sleeve 210 will return to its original state and re-engage with the puller 110; finally, reinsert the positioning pin 220 to complete the replacement of the local cutting tooth 120, thereby effectively reducing maintenance costs.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high speed steel broach tool characterized by, include: A cutting tool mechanism (100) includes a broach (110) and a plurality of cutting teeth (120), all of which are inserted into the broach (110); The tooth changing mechanism (200) includes multiple sleeves (210) detachably sleeved on the outside of the pull cutter (110), multiple positioning pins (220) movably connected between the pull cutter (110) and the sleeves (210), and two stop rods (230) vertically penetrating the cutter teeth (120). The two stop rods (230) are both in contact with the pull cutter (110) and the sleeves (210), and the inner end of the cutter teeth (120) penetrates the sleeves (210).

2. A high speed steel broach tool according to claim 1, characterized in that Multiple cutting teeth (120) are evenly spaced and arranged in a ring to form multiple circles, and the multiple circles of cutting teeth (120) are evenly spaced and arranged in a row.

3. A high speed steel broach tool according to claim 1 wherein, The cutting tooth (120) is composed of a tooth block (121) and a insert (122). The length of the insert (122) is greater than the length of the tooth block (121). The insert (122) is inserted into the puller (110). The cross-section of the cutting tooth (120) is T-shaped.

4. A high-speed steel broaching tool according to claim 1, characterized in that, The sleeve (210) is bent inward at both ends and is made of elastic metal material.

5. A high-speed steel broaching tool according to claim 1, characterized in that, Multiple locating pins (220) are arranged in a matrix, and the locating pins (220) are made of metal.

6. A high-speed steel broaching tool according to claim 1, characterized in that, The top and bottom of the blade (120) are fitted with a retaining plate (300), and both sides of the retaining plate (300) are provided with protrusions (400), and the retaining plate (300) is engaged with the sleeve (210).

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