Saw Blade Tooth-Back Hard Material Joining Without Post-Grinding
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Solution Overview
Problem
Existing methods for joining hard material bodies to saw blade teeth are limited by the space available on the tooth face and require additional processing steps to form a cutting geometry, with the back of the tooth being an underutilized area for attachment.
Innovation Solution
Joining hard material bodies to the back of the tooth, using a welding device with a welding electrode and forming a welding initiation approach on either the tooth or the hard material body to enhance electrical contact resistance and facilitate resistance welding, allowing for efficient attachment without the need for further grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If hard material bodies are attached to the tooth face, then the cutting geometry can be formed, but the available space is limited by tooth height and distance to the preceding tooth
Solution Approach 1:
The patent applies inversion by attaching the hard material body to the tooth back instead of the traditional tooth face. This reverses the attachment location from the front surface to the rear surface of the tooth, thereby utilizing previously unused space and eliminating the need for post-attachment grinding to form cutting geometry.
2Strength
If resistance welding is used to join hard material bodies to teeth, then a strong bond is achieved, but welding initiation requires sufficient electrical contact resistance
Solution Approach 1:
The patent applies local quality by creating a welding initiation approach with specific geometric features (protrusions or recesses) at the contact point between the hard material body and tooth. This localized geometric modification increases electrical contact resistance precisely where needed for welding initiation, while maintaining the overall strength of the bond through resistance welding.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for effective attachment of hard material bodies to the back of the tooth, eliminating the need for additional grinding and optimizing the cutting and sliding properties of the saw blade, while ensuring a strong and durable bond.
Implementation Method 1
the welding objects are melted at the welding point by supplying energy
Implementation Method 2
the respective hard material body and the respective tooth are joined to one another by resistance welding
Implementation Method 3
which is favorable for the heat input into the workpieces by initiating a welding pulse
Implementation Method 4
the weld initiation approach is melted more and more and thereby fuses with the pressed hard material body
Data Source
Figure 1
Figure 2
Figure 3~6
AI summary
The invention relates to a method for joining hard material bodies (4) to teeth (6) of a saw blade (8), in particular of a band saw blade or circular saw blade, wherein each tooth has a tooth face (110) and a tooth back (100), and the method has the following steps: bringing each tooth (6) of the saw blade (8) into a working region (10); guiding each hard material body (4) towards the tooth (6) located in the working region (10); advancing a joining device (24) into the working region (10); joining the hard material body (4) to the tooth (6) located in the working region (10); and withdrawing the joining device (24) out of the working region (10). According to the invention, each hard material body (4) is joined to the tooth back (100) of each tooth (6).