Grinding head

Abstract

The utility model discloses a grinding machining head which comprises a machine head shell, a machining groove is formed in the first end of the machine head shell, a connecting ring is arranged at the second end of the machine head shell, a cutting groove is formed in the inner wall of the machining groove, and a chip groove and a grinding hole which are staggered in position are formed in the side wall of the machine head shell. The grinding piece comprises a grinding disc and a rotating shaft, the grinding disc is in clearance fit with the inner wall of the machining groove, the first end of the rotating shaft is fixedly connected with the grinding disc, and the second end of the rotating shaft extends into the connecting ring; and the protective cover is arranged on the outer wall of the machine head shell in a sleeving mode and rotationally connected to the outer wall of the machine head shell, alignment holes are formed in the circumferential side wall of the protective cover, and the alignment holes communicate with the corresponding polishing holes. According to the grinding machining head, abrasive dust and a cut tungsten electrode end can be discharged from the opening of the chip discharging groove, the abrasive dust and the tungsten electrode end are prevented from being retained in the machining groove to interfere with rotation of the grinding disc, and it is guaranteed that a grinding piece works stably.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a grinding processing head. Background Art

[0002] The grinding shape and grinding quality of the tungsten electrode for welding have a great influence on the welding quality of the welded workpiece. Traditionally, tungsten electrode grinding is carried out on a rotating electric grinding tool such as a grinding wheel machine or an angle grinder. The operator holds the tungsten electrode in hand and contacts the rotating grinding disc at a certain angle, while rotating the tungsten electrode along the axis of the tungsten electrode until a satisfactory end is ground out. For example, the utility model patent with the announcement number CN202240801U discloses a portable tungsten electrode grinder head, including a head and a high-speed motor. A diamond grinding disc is provided inside the head, and the diamond grinding disc is driven by a high-speed motor. The head is provided with a grinding hole for tungsten electrode grinding and a grinding hole for tungsten electrode flattening. However, when the grinder head is in use, sparks easily fly into and out of the head, affecting the grinding operation. The grinding chips are difficult to clean, and the grinding chips and the cut tungsten pole are easily retained in the head, interfering with the work of the grinding disc. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the above-mentioned technology and to design a grinding processing head. The protective cover can be removed for cleaning to prevent grinding chips and tungsten extremes from being retained in the processing groove and interfering with the rotation of the grinding disc, thereby ensuring stable operation of the grinding part and being more convenient to use.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a grinding head, comprising:

[0005] A handpiece shell, wherein a machining groove is provided on the first end of the handpiece shell, a connecting ring is provided on the second end of the handpiece shell, the machining groove is communicated with the connecting ring, a cutting groove is provided on the inner wall of the machining groove, the cutting groove extends along the axial direction of the machining groove and passes through the first end of the handpiece shell, and a chip removal groove and a grinding hole are provided on the side wall of the handpiece shell at staggered positions, the chip removal groove and the grinding hole are both communicated with the machining groove, and the grinding hole is for inserting a tungsten electrode;

[0006] A grinding member, comprising a grinding disc and a rotating shaft, wherein the grinding disc is clearance-matched with the inner wall of the processing groove, a first end of the rotating shaft is fixedly connected to the grinding disc, and a second end of the rotating shaft extends into the connecting ring;

[0007] A protective cover is sleeved and rotatably connected to the outer wall of the machine head shell to cover the chip removal groove and the processing groove. The circumferential side wall of the protective cover is provided with an alignment hole, and the alignment hole is connected to the corresponding grinding hole.

[0008] Preferably, the polishing hole passes through the side wall of the head shell.

[0009] Preferably, a mounting hole is passed through the head shell, the mounting hole is detachably connected to a guide sleeve, and the polishing hole is formed on the inner wall of the guide sleeve.

[0010] Preferably, a limiting ring is provided on the inner wall of the mounting hole close to the processing groove, and the limiting ring is coaxially arranged and communicated with the polishing hole.

[0011] Preferably, the outer wall of the guide sleeve is threadedly engaged with the inner wall of the mounting hole, and a driving groove is provided on the end of the guide sleeve.

[0012] Preferably, a plurality of the grinding holes are provided, and the plurality of the grinding holes are arranged at intervals along the circumference of the processing groove.

[0013] Preferably, the polishing holes are provided in at least two groups, the inclination angles of the two groups of polishing holes are different, and the positions of the two groups of polishing holes are staggered.

[0014] Preferably, a holding ring is provided on the circumferential outer wall of the head shell close to the connecting ring, a sealing ring is embedded in the circumferential outer wall of the holding ring, and the inner wall of the protective cover is tightly pressed against the outer wall of the sealing ring.

[0015] Preferably, friction lines are formed on the circumferential outer wall of the holding ring.

[0016] Preferably, the protective cover is made of transparent material.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this solution, a protective cover is provided on the machine head housing to cover the chip removal groove and the processing groove. The user can rotate the protective cover to make the alignment hole correspond to the grinding hole, thereby inserting the tungsten electrode into the grinding hole. The rotating shaft is connected to the output shaft of the external rotating motor to drive the grinding disk to rotate. The end of the tungsten electrode extending into the processing groove abuts against the grinding disk to perform the grinding operation. During the grinding process, flying sparks and grinding chips are blocked by the processing groove and the protective cover to prevent flying sparks and grinding chips from affecting the user's operation. After the grinding operation is completed, the user can remove the protective cover to clean the processing groove and the protective cover.

[0019] 2. In this solution, the cutting groove is opened on the inner wall of the processing groove. When cutting the tungsten electrode, the user needs to remove the protective cover so that the tungsten electrode can be inserted into the cutting groove from the opening of the processing groove. The grinding disk cuts the end of the tungsten electrode extending out of the cutting groove. The grinding chips generated by the grinding operation and the cut tungsten end can be discharged from the opening of the chip groove, avoiding the grinding chips and tungsten end being retained in the processing groove and interfering with the rotation of the grinding disk, thereby ensuring the stable operation of the grinding part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the processing head in Example 1;

[0021] Figure 2 is a cross-sectional view of the processing head in Example 1;

[0022] Figure 3 is a schematic structural diagram of the processing head in Example 2;

[0023] Figure 4 It is a cross-sectional view of the processing head in the second embodiment.

[0024] In the figure: 1. Machine head shell; 101. Processing groove; 102. Connecting ring; 103. Cutting groove; 104. Chip removal groove; 105. Grinding hole; 106. Mounting hole; 107. Limiting ring; 108. Holding ring; 109. Sealing ring; 110. Friction pattern; 2. Grinding part; 21. Grinding disc; 22. Rotating shaft; 3. Protective cover; 301. Alignment hole; 4. Guide sleeve; 401. Drive groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the following embodiments and accompanying drawings.

[0026] Example 1:

[0027] refer to Figure 1 、 Figure 2 , a grinding processing head includes a head shell 1, a grinding part 2 and a protective cover 3. The head shell 1 is cylindrical, and a processing groove 101 is provided at the first end of the head shell 1, and a connecting ring 102 is provided at the second end of the head shell 1. The connecting ring 102 is integrally formed with the head shell 1, and the processing groove 101 is connected to the connecting ring 102 and is coaxially arranged. The inner wall of the processing groove 101 is provided with a cutting groove 103, which extends along the axial direction of the processing groove 101 and passes through the first end of the head shell 1. The side wall of the head shell 1 is provided with a chip groove 104 and a plurality of grinding holes 105. The chip groove 104 passes through the middle side wall of the head shell 1 and is connected to the processing groove 101. A plurality of grinding holes 105 pass through the circumferential side wall of the first end of the head shell 1 and are connected to the processing groove 101, and the plurality of grinding holes 105 are arranged at intervals along the circumference of the processing groove 101, and the grinding holes 105 are for tungsten electrodes to be inserted.

[0028] Preferably, the grinding holes 105 are set to three groups, the positions of the grinding holes 105 in each group are staggered, and the inclination angles of the grinding holes 105 in each group are different. In this embodiment, the inclination angles of the three groups of grinding holes 105 are 15°, 22.5°, and 32°, respectively, and there are 6 grinding holes 105 in each group, and the diameters of the 6 grinding holes 105 in each group are φ1, φ1.6, φ2, φ2.4, φ3.2, and φ4, respectively.

[0029] The grinding member 2 includes a grinding disc 21 and a rotating shaft 22. The grinding disc 21 is located in the processing groove 101 and is exposed on the opening of the chip groove 104. The grinding disc 21 is clearance-matched with the inner wall of the processing groove 101. The rotating shaft 22 is exposed in the opening area of the chip groove 104. The first end of the rotating shaft 22 is fixedly connected to the middle of the grinding disc 21. The second end of the rotating shaft 22 extends into the connecting ring 102. The inner ring wall of the connecting ring 102 can be a threaded section so that an external rotating motor can be connected. The rotating shaft 22 is connected to the output shaft of the external rotating motor to drive the grinding disc 21 to rotate.

[0030] A grip ring 108 is provided on the circumferential outer wall of the machine head housing 1 near the connecting ring 102. Friction grooves 110 are formed on the circumferential outer wall of the grip ring 108 to facilitate the user's grip of the machine head housing 1. A protective cover 3 is sleeved on the outer wall of the machine head housing 1 to cover the chip removal groove 104 and the processing groove 101. The circumferential side wall of the protective cover 3 is provided with a waist-shaped alignment hole 301.

[0031] When grinding the tungsten electrode, the user can rotate the protective cover 3 to align the alignment hole 301 with the grinding hole 105. Preferably, the inner diameter of the protective cover 3 is larger than the outer diameter of the head shell 1. Two symmetrically arranged sealing rings 109 are embedded in the circumferential outer wall of the holding ring 108. The inner wall of the protective cover 3 and the outer wall of the sealing ring 109 are tightly abutted to position the protective cover 3, thereby preventing the protective cover 3 from shifting during the grinding operation of the processing head. Preferably, the protective cover 3 is made of a transparent material, which can be acrylic material, so that the user can observe the head shell 1.

[0032] When the alignment hole 301 is connected to its corresponding grinding hole 105, the user can insert the tungsten electrode into the corresponding grinding hole 105, and the end of the tungsten electrode extends into the processing groove 101 and abuts against the grinding disk 21 to perform the grinding operation. During the grinding process, the flying sparks and grinding chips are blocked by the processing groove 101 and the protective cover 3 to prevent the flying sparks and grinding chips from affecting the user's operation. After the grinding operation is completed, the user can remove the protective cover 3 to clean the processing groove 101 and the protective cover 3, and the user can also directly insert the tungsten electrode into the corresponding grinding hole 105 after removing the protective cover 3 to perform the grinding operation. The grinding chips generated by grinding fall into the chip groove 104 through the gap between the grinding disk 21 and the inner wall of the processing groove 101, and are discharged from the opening of the chip groove 104 to prevent the grinding chips from being retained in the processing groove 101 and interfering with the rotation of the grinding disk 21.

[0033] When cutting the tungsten electrode, the user needs to remove the protective cover 3 so that the tungsten electrode can be inserted from the opening of the processing groove 101 into the cutting groove 103. The grinding disc 21 cuts the end of the tungsten electrode extending out of the cutting groove 103. The cut tungsten end can be discharged from the opening of the chip groove 104 to avoid the tungsten end remaining in the processing groove 101 and interfering with the rotation of the grinding disc 21, thereby ensuring the stable operation of the grinding part 2.

[0034] Example 2:

[0035] refer to Figure 3 、 Figure 4 , different from the first embodiment, a mounting hole 106 is passed through the head shell 1, and a limiting ring 107 is provided on the inner wall of the mounting hole 106 near the processing groove 101. The mounting hole 106 is detachably connected to the guide sleeve 4, and the grinding hole 105 is formed on the inner wall of the guide sleeve 4. The limiting ring 107 is coaxially arranged and connected to the grinding hole 105. Preferably, the inner diameter of the limiting ring 107 is larger than the inner diameter of the grinding hole 105. The end of the tungsten electrode to be ground passes through the grinding hole 105 and the corresponding limiting ring 107 in sequence and extends into the processing groove 101.

[0036] The outer wall of the guide sleeve 4 is threadedly matched with the inner wall of the mounting hole 106, and a drive groove 401 is provided on the end of the guide sleeve 4. The drive groove 401 is suitable for a flat-head screwdriver or a cross screwdriver, so that the user can insert the guide sleeve 4 into the mounting hole 106 for screwing on or off, making it convenient for the user to replace the grinding hole 105, thereby improving the practicality of the processing head.

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A grinding head, characterized in that: include: A machine head shell (1), wherein a machining groove (101) is provided at the first end of the machine head shell (1), a connecting ring (102) is provided at the second end of the machine head shell (1), the machining groove (101) is communicated with the connecting ring (102), a cutting groove (103) is provided on the inner wall of the machining groove (101), the cutting groove (103) extends along the axial direction of the machining groove (101) and passes through the first end of the machine head shell (1), a side wall of the machine head shell (1) is provided with a chip removal groove (104) and a grinding hole (105) at staggered positions, the chip removal groove (104) and the grinding hole (105) are both communicated with the machining groove (101), and the grinding hole (105) is for inserting a tungsten electrode; A grinding member (2), the grinding member (2) comprising a grinding disc (21) and a rotating shaft (22), the grinding disc (21) being loosely fitted with an inner wall of the processing groove (101), a first end of the rotating shaft (22) being fixedly connected to the grinding disc (21), and a second end of the rotating shaft (22) extending into the connecting ring (102); A protective cover (3) is sleeved and rotatably connected to the outer wall of the machine head shell (1) to cover the chip removal groove (104) and the processing groove (101); the circumferential side wall of the protective cover (3) is provided with an alignment hole (301), and the alignment hole (301) is connected to the corresponding grinding hole (105).

2. A grinding head according to claim 1, characterized in that: The grinding hole (105) passes through the side wall of the head shell (1).

3. A grinding head according to claim 1, characterized in that: The head shell (1) is provided with a mounting hole (106), the mounting hole (106) is detachably connected to a guide sleeve (4), and the grinding hole (105) is formed on the inner wall of the guide sleeve (4).

4. A grinding head according to claim 3, characterized in that: A limiting ring (107) is provided on the inner wall of the mounting hole (106) close to the processing groove (101), and the limiting ring (107) is coaxially arranged with and communicated with the grinding hole (105).

5. A grinding head according to claim 3, characterized in that: The outer wall of the guide sleeve (4) is threadedly engaged with the inner wall of the mounting hole (106), and a driving groove (401) is provided on the end of the guide sleeve (4).

6. A grinding head according to claim 1, characterized in that: A plurality of the grinding holes (105) are provided, and the plurality of the grinding holes (105) are spaced apart along the circumference of the processing groove (101).

7. A grinding head according to claim 6, characterized in that: The grinding holes (105) are provided in at least two groups, the two groups of grinding holes (105) have different inclination angles, and the positions of the two groups of grinding holes (105) are staggered.

8. The grinding head according to claim 1, wherein: A holding ring (108) is provided on the circumferential outer wall of the head shell (1) close to the connecting ring (102), a sealing ring (109) is embedded in the circumferential outer wall of the holding ring (108), and the inner wall of the protective cover (3) is tightly pressed against the outer wall of the sealing ring (109).

9. A grinding head according to claim 8, characterized in that: The circumferential outer wall of the gripping ring (108) is formed with friction lines (110).

10. The grinding head according to claim 1, wherein: The protective cover (3) is made of transparent material.

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